Contents

Carrier 50BVW Installation Manual PDF

1 of 76
1 of 76

Summary of Content for Carrier 50BVW Installation Manual PDF

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500119-01 Printed in U.S.A. Form 50BV-5SI Pg 1 7-16 Replaces: 50BV-4SI

Installation, Start-Up, Service and Controls Operation and Troubleshooting

CONTENTS Page

SAFETY CONSIDERATIONS. . . . . . . . . . . . . . . . . . . . . . 2 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2, 3 MAJOR SYSTEM COMPONENTS . . . . . . . . . . . . . . . . . 3 Constant Volume (CV) Units . . . . . . . . . . . . . . . . . . . . . 3 Variable Air Volume (VAV) Units . . . . . . . . . . . . . . . . . 3 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-24 Step 1 Complete Pre-Installation Checks . . . . . . 3 EXAMINE THE UNIT UNIT STORAGE MODULAR UNITS Step 2 Rig and Place Unit . . . . . . . . . . . . . . . . . . . . . 4 REMOVE PACKAGING UNIT LOCATION UNIT PLACEMENT ACOUSTICAL CONSIDERATIONS ASSEMBLING MODULAR UNITS Step 3 Install Ductwork . . . . . . . . . . . . . . . . . . . . . . . 14 DUCT STATIC PRESSURE PROBE AND TUBING

(VAV Only) DUCT HIGH-STATIC (DHS) LIMIT SWITCH (VAV Only) Step 4 Make Piping Connections . . . . . . . . . . . . . 15 CONDENSER WATER PIPING (Water-Cooled Only) EVAPORATOR CONDENSATE DRAIN HOT WATER HEATING COIL (Optional) WATERSIDE ECONOMIZER (Optional) Step 5 Complete Electrical Connections. . . . . . 18 POWER WIRING CONTROL WIRING (CV Only) REMOTE CONDENSER FAN CONTACTOR WIRING CONTROL WIRING (VAV Only) SUPPLY AIR TEMPERATURE SENSOR (SAT) SMOKE DETECTOR/FIRE ALARM SHUTDOWN (FSD) REMOTE OCCUPANCY (ROCC) RETURN AIR TEMPERATURE SENSOR (RAS) START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-35 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 CRANKCASE HEATERS CONFIRM THE INPUT POWER PHASE SEQUENCE INTERNAL WIRING RETURN-AIR FILTERS COMPRESSOR MOUNTING REFRIGERANT SERVICE PORTS CV Unit Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 EVAPORATOR FAN COOLING CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36-53 Unit Protection Module (UPM) . . . . . . . . . . . . . . . . . . . 36 GENERAL DESCRIPTION FEATURES AND SAFETIES Sequence of Operation, CV Units 50BVC,Q,T,V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 WATER ECONOMIZER COOLING Y CALL (COOLING OR HEATING)

Page I/O Flex 6126 Controller Specifications, VAV Units Only 50BVJ,W . . . . . . . . . . . . . . . . . . 39 POWER PHYSICAL ENVIRONMENTAL OPERATING RANGE DIGITAL OUTPUTS ANALOG OUTPUTS UNIVERSAL INPUTS STANDARD COMMUNICATION PORTS RNET PORT LOCAL ACCESS PORT XNET PORT BACNET SUPPORT STATUS INDICATION BATTERY PROTECTION LISTED BY WEIGHT OVERALL DIMENSIONS MOUNTING HOLE DIMENSIONS Addressing the I/O Flex 6126 Controller . . . . . . . . . 39 Wiring Inputs and Outputs . . . . . . . . . . . . . . . . . . . . . . 39 Input I/O Flex 6126 Controller . . . . . . . . . . . . . . . . . 40 BINARY OUTPUTS ANALOG OUTPUTS TO WIRE FIELD ACCESSORIES ON THE I/O FLEX 6126

CONTROLLER OR I/O FLEX EX8160 EXPANDER I/O Flex EX8160 Expander Module . . . . . . . . . . . . . . 43 GENERAL DESCRIPTION BACVIEW6

Water to Air Operation, VAV Units Only 50BVJ,W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 Sequence of Operation, VAV Units Only 50BVJ,W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 CONTROL SOURCE (RUN CONDITIONS) EXTERNAL CONTROL SOURCE DIGITAL INPUT BAS MANUAL ON INTERNAL CONTROL SOURCE (KEYPAD) Unit Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 COOLING ONLY COOLING ONLY WITH HOT GAS RE-HEAT Fan Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 START/STOP FANS VARIABLE FREQUENCY DRIVE (VFD) FAN SUPPLY AND RETURN FAN OPERATION FAN OPERATION DURING DISCHARGE (SUPPLY AIR

TEMPERATURE) AIR CONTROL (DAC) VFD CONTROL FAN OPERATION DURING SMOKE EVENT FAN HISTORY STATISTICS

Omnizone 50BV020-064

Water-Cooled Indoor Self-Contained Systems

2

Page Digital Inputs For Monitoring . . . . . . . . . . . . . . . . . . . . 46 FILTER STATUS (DFS) WATER DIFFERENTIAL PRESSURE SWITCH (DPS) SMOKE DETECTOR STATUS (SDS) COMPRESSOR STATUS Cooling Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 COOLING COOLING MODE DISCHARGE AIR CONTROL WITH MODULATING RE-

HEAT DISCHARGE AIR TEMPERATURE (DAT) SENSOR HIGH DISCHARGE AIR TEMPERATURE CONDITION

(COOLING) HIGH STATIC LOCK WATERSIDE ECONOMIZER MODE LEAVING WATER TEMPERATURE (LWT) UPM Fault Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 COMMUNICATION LEDS COMPLIANCE SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53, 54 Compressor Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 Fan Motor Replacement . . . . . . . . . . . . . . . . . . . . . . . . . 53 MAINTENANCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54-56 Cleaning Unit Exterior . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Coil Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Air Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Condensate Drains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Water-Cooled Condensers . . . . . . . . . . . . . . . . . . . . . . 54 GRAVITY FLOW METHOD FORCED CIRCULATION METHOD Fan Motor Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 Fan Bearing Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . 55 Fan Sheaves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 ALIGNMENT Evaporator Fan Performance Adjustment . . . . . . . 55 BELT TENSION ADJUSTMENT Compressor Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . 56-58 SCHEMATICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58-63 SENSORS AND INTEGRATION POINTS . . . . . . 64-73 START-UP CHECKLIST. . . . . . . . . . . . . . . . . . CL-1, CL-2

SAFETY CONSIDERATIONS Installing, starting up, and servicing air-conditioning

components and equipment can be dangerous. Only trained, qualified installers and service mechanics should install, start up, and service this equipment.

When working on the equipment, observe precautions in the literature and on tags, stickers, and labels attached to the equipment. Follow all safety codes. Wear safety glasses and work gloves.

GENERAL

Omnizone 50BV indoor packaged units are very flexible for a variety of applications. These self-contained units are available as water-cooled units. The 50BV units are available with either constant volume (CV) or variable air volume (VAV) controls. In addition, the 50BV unit is available as a water- cooled heat pump. Finally, Omnizone 50BV units are available in two cabinet styles. Unit sizes 020-034 are constructed in a single-piece, unpainted galvanized cabinet. Unit sizes 034-064 are available as modular units, and can be taken apart for easier

WARNING

Before performing service or maintenance operations on unit, turn off main power switch to unit and open all dis- connects. More than one disconnect switch may be required to deenergize this equipment. Electric shock hazard can cause injury or death.

CAUTION

Use care in handling, rigging, and setting bulky equipment.

WARNING

DO NOT USE TORCH to remove any component. System contains oil and refrigerant under pressure. To remove a component, wear protective gloves and goggles and proceed as follows: a. Shut off electrical power to unit. b. Recover refrigerant to relieve all pressure from sys-

tem using both high-pressure and low pressure ports. c. Traces of vapor should be displaced with nitrogen

and the work area should be well ventilated. Refrig- erant in contact with an open flame produces toxic gases.

d. Cut component connection tubing with tubing cutter and remove component from unit. Use a pan to catch any oil that may come out of the lines and as a gage for how much oil to add to the system.

e. Carefully unsweat remaining tubing stubs when nec- essary. Oil can ignite when exposed to torch flame.

Failure to follow these procedures may result in personal injury or death.

CAUTION

DO NOT re-use compressor oil or any oil that has been exposed to the atmosphere. Dispose of oil per local codes and regulations. DO NOT leave refrigerant system open to air any longer than the actual time required to service the equipment. Seal circuits being serviced and charge with dry nitrogen to prevent oil contamination when timely repairs cannot be completed. Failure to follow these proce- dures may result in damage to equipment.

3

installation. Modular units are built using an unpainted, galva- nized steel cabinet with steel framework, and can be easily dis- assembled without breaking the refrigerant lines. See Table 1 for a model number reference by application.

Each unit contains multiple scroll compressors piped in separate refrigerant circuits. Each water-cooled circuit includes a coaxial (tube-in-tube) condenser, TXV (thermostatic expan- sion valve), individual evaporator coils, and all interconnecting piping. Water-cooled units are shipped fully charged with refrigerant. Remote air-cooled units are shipped with a nitrogen holding charge.

Each unit is equipped with one or two forward-curved cen- trifugal blowers, to ensure quiet air delivery to the conditioned space. Constant volume units operate at a single, adjustable fan speed and provide zone temperature control using a standard commercial thermostat. For VAV applications, the unit is sup- plied with a variable frequency drive(s) (VFD) that automati- cally adjusts blower speed to maintain a constant, adjustable duct static pressure. Compressors are automatically staged to provide supply air temperature control (VAV applications) or zone temperature control using a two-stage commercial ther- mostat (CV applications).

The 50BV units have removable access panels for easy servicing. These panels allow access to controls, compressors, condensers, VFD(s) (if applicable), evaporator motors, blow- ers, belts, pulleys, and refrigeration components.

MAJOR SYSTEM COMPONENTS

Constant Volume (CV) Units MAIN CONTROL BOARD (MCB) The main control board for the 50BVC, Q, T, and V units provides both controls and diagnostics including: Condensate Overflow Protection prevents unit operation in

the event that the drain pan clogs. Random Start provides a programmable start with a range

of 30 to 60 seconds. Anti-short Cycle Timer provides a 5-minute delay to pre-

vent compressor short cycling. Low Pressure Bypass Timer bypasses the low-pressure

switch for 120 seconds to avoid nuisance trips during cold start-up.

Brownout/Surge/Power Interruption Protection will shut down the main control board functions if the secondary voltage falls below 18 volts or goes above 30 volts. A blink code will flash while in fault mode. This will automatically reset when the voltage returns to the valid range.

Alarm Output contacts provide remote fault indication. Test/Service Pin is a jumper that reduces all time delay

settings to 6 seconds during troubleshooting or operation verification.

Reset occurs after a 5-minute delay when a fault condition occurs. When the timer expires, the unit will restart. If the same condition occurs a second time, the unit will be locked out.

Lockout Reset requires that the unit power be cycled at the unit controller via either the thermostat or unit disconnect.

NOTE: The refrigerant circuits on dual compressor models are completely independent. If either stage has a fault condi- tion the remaining stage will continue to operate without interruption. A freeze or condensate overflow lockout will shut down both refrigerant circuits. LEDs are provided for diagnostic purposes. Freeze protection will shut down the compressor circuit if

the refrigerant liquid temperature to the water to refrigerant heat exchanger falls below 26 F for 30 seconds continuous. This trip point can be lowered to 15 F for geothermal appli- cations employing antifreeze by cutting the JP1 and JP2 jumpers on the board.

Variable Air Volume (VAV) Units The 50BVJ and W units come equipped with a Carrier I/O Flex 6126 controller and a VFD. NOTE: The VAV units utilize face split coils and should not be operated below 50% of nominal airflow to prevent coil freezing.

INSTALLATION Omnizone 50BV units are intended for indoor installa-

tion only. Determine building alterations required to run piping, wiring, and ductwork. Read all installation instructions before installing the unit.

Step 1 Complete Pre-Installation Checks EXAMINE THE UNIT Examine the unit for shipping damage. File a claim with the transit company if damage is found. Check the shipment for completeness. Verify that the nameplate electrical requirements match the available power supply. UNIT STORAGE The 50BV units are designed and pack- aged for indoor storage and use only. If the equipment is not needed for immediate installation upon its arrival at the job site, it should be left in its shipping carton and stored in a clean, dry area. Units must only be stored or moved in the normal upright position, as indicated by the UP arrows on each carton, at all times. DO NOT STACK UNITS. MODULAR UNITS The 50BVT, V, W units are shipped in multiple sections for easy movement and installation. The sepa- rate modules of the High Boy units will pass through a standard 36-in. steel framed door or service elevator. The modules of a Low Boy unit will not. Circuit integrity is maintained because none of the refrigerant piping requires disconnection. Water pip- ing connections are made with the use of heavy-duty bronze- bodied unions so no field welding or brazing is required. NOTE: High-boy units ship as two pieces (air-conditioning/ filter section and blower section) and can be disassembled into 6 pieces. Low-boy units ship complete and will not fit through a 36 in. door. The low-boy units filter section is integral to unit and cannot be disassembled.

Table 1 Model Number Reference By Application Type

LEGEND *All units are cooling only unless specified.

MODEL TYPE* AVAILABLE CAPACITY CONSTRUCTION CONTROLS 50BVC Water-Cooled 18 to 30 nominal tons Single-piece CV 50BVQ Water-Cooled Heat Pump 18 to 30 nominal tons Single-piece CV 50BVJ Water-Cooled 18 to 30 nominal tons Single-piece VAV 50BVT Water-Cooled 30 to 60 nominal tons Modular CV 50BVV Water-Cooled Heat Pump 30 to 60 nominal tons Modular CV 50BVW Water-Cooled 30 to 60 nominal tons Modular VAV

CV Constant Volume VAV Variable Air Volume

4

Step 2 Rig and Place Unit Use proper lifting and handling practices to avoid damage to the unit. Move modular units with a fork truck using the baserails provided, or use spreader bars and lifting straps as shown in Fig. 1.

For single piece units, use spreader bars and rigging straps if lifting with a crane to avoid damage to the unit. Otherwise, move with a fork truck using the shipping pallet.

Refer to Fig. 2-8 for unit dimensions. Refer to Tables 2 and 3 for physical data.

REMOVE PACKAGING Remove all protective plastic; remove and discard unit top cover protector, filter cover, controller display protector, and water piping connection packaging. UNIT LOCATION Locate the unit in an indoor area that allows easy removal of the filters, access panels, and accessories. Make certain enough space is available for service personnel to perform maintenance or repairs. Provide sufficient room to make all water, duct, and electrical connections. If the unit is located in a small mechanical equipment room, make sure adequate space is available for air to return freely to the unit. These units are not approved for outdoor installations and must be installed inside the structure. Do not locate in areas that are subject to freezing. UNIT PLACEMENT Ensure that the floor is structurally strong enough to support the weight of the equipment with minimum deflection. A good, level floor is required for proper unit operation and to ensure proper fit-up and alignment of all bolt-together and union-coupled modules on modular units. ACOUSTICAL CONSIDERATIONS Proper acoustical considerations are a critical part of every systems design and operation. Each system design and installation should be reviewed for its own unique requirements. For job specific requirements, contact an acoustical consultant for guidance and recommendations.

In general, to reduce noise, consider the following: Locate mechanical room and ducts away from noise-sen-

sitive locations. Whenever possible, work with the archi- tect to locate the equipment rooms around the perimeters of restrooms, hallways, fire escapes, stair wells, etc., to reduce noise transmission. This allows not only for isola- tion from radiated sound but also enables the contractor to route duct systems around sensitive locations.

Construct the equipment room of concrete block or use a double offset stud wall with interwoven insulation. Seal all penetrations.

Design the system for low total static pressure. Use suitable vibration isolation pads or isolation springs

according to the design engineers specifications. A flexible canvas duct connector is recommended on

both the supply and return air sides of units to be connected to system ductwork.

Use a minimum of 15 ft of return ductwork between the last air terminal or diffuser and the unit.

Insulate supply and return ducts with 2-in., 3-lb density insulation.

Round duct is recommended. If rectangular ductwork is used, keep aspect ratios as small as possible (i.e., as close to square as possible).

Avoid any direct line of sight from return air grilles into the units return. If return air is to be ducted to an equipment room, an elbow should be installed within the equipment room.

Running a return air drop to near the floor of the room will aid in sound attenuation.

Do not exceed the recommended supply duct velocity of 2,000 fpm.

Do not exceed the recommended return duct velocity of 1,000 fpm.

Use turning vanes on 90-degree elbows. Place isolation springs under each corner and under each

compressor if utilized. ASSEMBLING MODULAR UNITS 50BVT,V,W unit sizes 034-064 ship in pieces. Reassemble the unit. Use the loose hardware provided in the main air-conditioning sec- tion and the instructions below. 1. The filter/economizer section ships bolted to the main air-

conditioning section and can be removed in the field (high-boy unit only). When reattaching the filter/econo- mizer section to the main air-conditioning section, place the filter side of the filter/economizer section facing out and away from the main air-conditioning section.

2. If the unit has 2 filter/economizer and 2 main air- conditioning sections (unit sizes 044-064), bolt the remaining filter/economizer section and main air- conditioning section together, as in Step 1 (high-boy unit only).

3. For units with 2 filter/economizer and 2 main air- conditioning sections, use the provided unions to assem- ble the water connections between the 2 additional sections joined in Step 2.

4. For units with multiple air-conditioning sections, connect the condensate drain hoses from the B side of the unit to the drain manifold on the A side of the unit.

5. For unit sizes 044-064, connect power wiring from the main terminal block in the A side of the unit to the power terminal block in the B side of the unit.

6. For VAV units only, install the duct static pressure sensor 3 to 6 ft downstream in the ductwork from the unit dis- charge outlet. To avoid improper operation, ensure the sensor is not installed in a place with fully developed air- flow (no turbulence).

Fig. 1 Modular Unit Rigging

USE SPREADER BAR TO PREVENT DAMAGE TO UNIT

4 X 4 ABOVE AND BELOW RETURN DUCT CONNECTIONS

CAUTION

Remove all shipping blocks, if any, under blower housing or damage to the fan may occur.

5

Fig. 2 50BVC,J,Q020-034 Dimensions (Without Waterside Economizer or Hot Water Coil)*

STANDARD BLOWER ORIENTATION

OPTIONAL BLOWER ORIENTATION

STANDARD BLOWER ORIENTATION

OPTIONAL BLOWER ORIENTATION

20.00

L L

L L

K 32.00 [813]

32.00 [813]

19.00 [483]

19.00 [483]

A50-9184

Shows recommended minimum service clearances.

NOTES: 1. Dimensions in inches [mm]. 2. 50BVJ units are rear return, top supply only. 3. Compressor, controls, and condenser access are through front panels. 4. Field power connections are 1 3/4 inches. Control connections are 7/8 inches. 5. Optional blower orientation is selected in model number nomenclature as option 9 in FIOP section (digits 15 and 16).

50BV(C)(Q)(J) UNIT NOMINAL SIZE

020 024 028 034

A 14.75 [375] 14.75 [375] 14.75 [375] 18.88 [479]

B 8.50 [216] 8.50 [216] 8.50 [216] 8.75 222] C 2.75 [70] 2.75 [70] 2.75 [70] 2.75 [70] D 40.00 [1016] 40.00 [1016] 40.00 [1016] 61.00 [1549] E 20.00 [508] 20.00 [508] 20.00 [508] 30.00 [762] F 38.00 [965] 38.00 [965] 38.00 [965] 58.00 [1473] G 62.00 [1575] 62.00 [1575] 62.00 [1575] 86.50 [2197] H 4.00 [101] 4.00 [101] 4.00 [101] 4.00 [101] J 18.75 [476] 18.75 [476] 18.75 [476] 18.75 [476] K 3.25 [83] 3.25 [83] 3.25 [83] 3.50 [89] L 33.00 [838] 33.00 [838] 33.00 [838] 32.00 [813]

WATER CONN. 2 FPT 2 FPT 2 FPT 2 FPT CONDENSATE

CONN. 1-1/4 FPT 1-1/4 FPT 1-1/4 FPT 1-1/4 FPT

FILTER QTY & SIZE

(4) 20 x 34-1/2 x 1

(4) 20 x 34-1/2 x 1

(4) 20 x 34-1/2 x 1

(4) 30 x 34-1/2 x 1

*For further detailed drawings, please consult the latest version of SCUBuilder.

6

Fig. 3 50BVT,V,W034 (High-Boy) Dimensions

REAR VIEW RETURN AIR VIEW

LEFT SIDE VIEW

FRONT VIEW

60.63

EVAPORATOR ACCESS

BLOWER SECTION ACCESS

LEFT SIDE VIEW

FILTER ACCESS

DX EVAPORATOR

FRONT DISCHARGE

COMPRESSOR ACCESS

COMPRESSOR ACCESS

EVAPORATOR ACCESS

EVAPORATOR ACCESS

ACTUAL

16.5 X 29.75

DRAIN* PRE-COOLING

CONDENSATE*

H20 OUT*

H20 IN*

1.25

WATER CONNECTIONS

NOMINAL

17 X 30

1.25

2.5

2.5

FILTERS **4 INCHES THICK

QUANTITY

*F.P.T. TYPE CONNECTION

8

LIFTING SUPPORT RAIL

2.50

CONDENSATE DRAIN

WATER OUT

31.00

13.25 17.50

51.63

LOW VOLTAGE

HIGH VOLTAGE

CONTROL BOX

ELECTRICAL BOX ELECTRICAL BOX ACCESS

119.75

2.00

VFD BOX

BLOWER SECTION ACCESS

23.75 18.75

49.75

21.75

9.88

90.25

69.50

ECONO. COIL

2.88

11.2515.50

5.00

PRE-COOLING DRAIN

WATER IN

HOT WATER COIL

HOT WATER OUT

HOT WATER IN

23.25

HW IN/OUT (SWEAT)

1.38

BLOWER SECTION REMOVABLE FOR SHIPPING

BLOWER SECTION REMOVABLE FOR SHIPPING

A50-9185

NOTES: 1. Dimensions in inches. 2. All units are rear return airflow configuration. 3. Constant volume units are available with front or rear air supply 4. VAV units (50BVW) are available with rear supply only. 5. Recommended minimum service clearances are as follows:

a. Front and rear 30 in. (762 mm) b. Left or right side 65 in. (1651 mm) for coil removal c. Side opposite coil removal 20 in. (508 mm)

6. Optional hot water coil connections may add up to 3 in. on both the left and right side of the unit, increasing the unit width by 6 inches.

CONNECTIONS

REPLACEMENT FILTERS : EIGHT (8) AT 17 x 27 x 4 INCHES.

A WATER OUT 2-1/2 IN. FPT

B WATER IN 2-1/2 IN. FPT

C CONDENSATE DRAIN 1-1/4 IN. FPT

D ECONOMIZER (PRE-COOLING) DRAIN 1-1/4 IN. FPT

7

Fig. 4 50BVT,V,W034 (Low-Boy) Dimensions

A50-9186

DRAIN* PRE-COOLING

CONDENSATE*

H20 OUT*

H20 IN*

1.25

WATER CONNECTIONS

1.25

2.5

2.5

HW IN/OUT (SWEAT)

1.38

NOTES: 1. Dimensions in inches. 2. All units are rear return airflow configuration. 3. Recommended minimum service clearances are as follows:

a. Front and rear 30 in. (762 mm) b. Left or right side 65 in. (1651 mm) for coil removal c. Side opposite coil removal 20 in. (508 mm)

4. Optional hot water coil connections may add up to 3 in. on both the left and right side of the unit, increasing the unit width by 6 inches.

CONNECTIONS

REPLACEMENT FILTERS : EIGHT (8) AT 17 x 27 x 4 INCHES.

A WATER OUT 2-1/2 IN. FPT

B WATER IN 2-1/2 IN. FPT

C CONDENSATE DRAIN 1-1/4 IN. FPT

D ECONOMIZER (PRE-COOLING) DRAIN 1-1/4 IN. FPT

8

Fig. 5 50BVT,V,W044-064 (High-Boy) Dimensions

REAR VIEW RETURN AIR

LEFT SIDE VIEW

FRONT VIEW

60.63

EVAPORATOR ACCESS

BLOWER SECTION ACCESS

FILTER ACCESS

DX EVAPORATOR

FRONT DISCHARGE

COMPRESSOR ACCESS

COMPRESSOR ACCESS

EVAPORATOR ACCESS

EVAPORATOR ACCESS

ACTUAL

16.5 X 29.75 X 4

NOMINAL

17 X 30 X 4

FILTERS

QUANTITY

*F.P.T. Type Connection

16

LIFTING SUPPORT RAIL

2.50 CONDENSATE DRAIN

WATER OUT

31.00

13.25 17.50

51.63

LOW VOLTAGE

HIGH VOLTAGE

ELECTRICAL BOX ELECTRICAL BOX ACCESS

2.00

VFD BOX

2.88

BLOWER SECTION ACCESS

23.75 18.75

49.75

21.75 9.88

90.25

COMPRESSOR ACCESS

BLOWER SECTION ACCESS

COMPRESSOR ACCESS

EVAPORATOR ACCESS

EVAPORATOR ACCESS

CONTROL BOX

ELECTRICAL BOX ELECTRICAL BOX ACCESS

49.75

21.759.88

ECONO COIL

11.2515.50

5.00

PRE-COOLING DRAIN

WATER IN

HOT WATER COIL

HOT WATER OUT

HOT WATER IN

23.25

119.75

69.50

139.00

BLOWER SECTION REMOVABLE FOR SHIPPING

BLOWER SECTION REMOVABLE FOR SHIPPING

CONDENSING SECTION REMOVABLE FOR SHIPPING

CONDENSING SECTION REMOVABLE FOR SHIPPING

WATER CONNECTIONS

Model 44 54 64 H2O IN* 2.5 3.0 3.0 H2O OUT* 2.5 3.0 3.0

Condensate* 1.25 1.25 1.25 Pre-Cooling Drain* 1.25 1.25 1.25

A50-9187

1.38 1.38 1.38 HW IN/OUT (Sweat)

NOTE: Optional hot water coil connections may add up to 3 in. on both the left and right side of the unit, increasing the unit width by 6 inches.

9

ACTUAL

16.5 X 29.75 X 4

NOMINAL

17 X 30 X 4

FILTERS

QUANTITY

*F.P.T. Type Connection

16

A50-9188

WATER CONNECTIONS

Model 44 54 64 H2O IN* 2.5 3.0 3.0 H2O OUT* 2.5 3.0 3.0

Condensate* 1.25 1.25 1.25 Pre-Cooling Drain* 1.25 1.25 1.25

1.38 1.38 1.38 HW IN/OUT (Sweat)

Fig. 6 50BVT,V,W044-064 (Low-Boy) Dimensions

CONNECTIONS

REPLACEMENT FILTERS : SIXTEEN (16) AT 17 x 27 x 4 INCHES.

UNIT SIZE 044 054 064

A WATER OUT 2-1/2 IN. FPT 3 IN. FPT 3 IN. FPT

B WATER IN 2-1/2 IN. FPT 3 IN. FPT 3 IN. FPT

C CONDENSATE DRAIN 1-1/4 IN. FPT

1-1/4 IN. FPT

1-1/4 IN. FPT

D ECONOMIZER (PRE-COOLING) DRAIN 1-1/4 IN. FPT

1-1/4 IN. FPT

1-1/4 IN. FPT

NOTES: 1. Dimensions in inches. 2. All units are rear return airflow configuration. 3. Recommended minimum service clearances are as follows:

a. Front and rear 30 in. (762 mm) b. Left and right sides 65 in. (1651 mm) for coil removal

4. Optional hot water coil connections may add up to 3 in. on both the left and right side of the unit, increasing the unit width by 6 inches.

10

Table 2 Physical Data 50BVC,J,Q

LEGEND

UNIT 50BVC,J,Q 020 024 028 034 NOMINAL CAPACITY (Tons) 18 20 25 30 OPERATING WEIGHT (lb)

50BVC,Q50BVJ 11921227 13781413 14281473 16801725 COMPRESSOR Copeland Scroll

Quantity 2 2 2 2 Number of Refrigerant Circuits 2 2 2 2 Oil (oz) Ckt 1Ckt 2 8585 110110 110110 140140

REFRIGERANT TYPE R-410A Expansion Device TXV TXV TXV TXV Operating Charge (oz) per Ckt 130 145 145 288

CONDENSER (50BVC,Q,J only) Tube-in-Tube Coaxial Quantity of Manifolded Circuits 2 2 2 2 Nominal Flow Rate (gpm) 54 60 75 90 Water Flow Range (gpm) 36-72 40-80 50-100 60-120 Max Water Working Pressure (psig) 400 400 400 400 Max Refrig. Working Pressure (psig) 450 450 450 450 Min Entering Water Temp (F) 50 50 50 50 Max Entering Water Temp (F) 110 110 110 110 Waterside Volume (gal) 3.6 4.0 5.0 6.0

EVAPORATOR COIL RowsFins/in. 314 314 314 314 Total Face Area (sq ft) 18.1 18.1 18.1 22.0

EVAPORATOR FAN QuantitySize 215x15 215x15 215x15 215x15 Type Drive Belt Belt Belt Belt Nominal cfm 7200 8000 10,000 12,000 Std Motor QtyhpFrame Size 21.556 2256H 2356HZ 2556HZ Alt 1 Motor QtyhpFrame Size 2256H 2356HZ 2556HZ Alt 2 Motor QtyhpFrame Size 2356HZ 2556HZ Alt 3 Motor QtyhpFrame Size 2556HZ Motor Nominal rpm (1.5, 2, 3, hp) 1725 1725 1725 Motor Nominal rpm (5 hp) 3450 3450 3450 3450 Fan Drive rpm Range

Std Fan Drive (1.5, 2, 3 hp) 753-952 753-952 753-952 Std Fan Drive (5 hp) 967-1290 967-1290 967-1290 967-1290 Med Static Fan Drive (1.5, 2, 3 hp) 872-1071 872-1071 872-1071

Motor Bearing Type Ball Ball Ball Ball Maximum Allowable rpm 1300 1300 1300 1300 Motor Pulley Pitch Diameter

Std Fan Drive (1.5, 2, 3 hp) 3.7-4.7 3.7-4.7 3.7-4.7 Std Fan Drive (5 hp) 2.9-3.9 2.9-3.9 2.9-3.9 2.9-3.9 Med Static Fan Drive (1.5, 2, 3 hp) 4.3-5.3 4.3-5.3 4.3-5.3

Motor Shaft Diameter (in.) (1.5, 2 hp) 5/8 5/8 Motor Shaft Diameter (in.) (3, 5 hp) 7/8 7/8 7/8 7/8 Belt, QtyTypeLength (in.)

Std Fan Drive (1.5, 2 hp) 1B39 1B39 Std Fan Drive (3 hp) 2B39 2B39 2B39 Std Fan Drive (5 hp) 2...BX42 2...BX42 2...BX42 2...BX42 Med Static Fan Drive (1.5, 2 hp) 1B40 1B40 Med Static Fan Drive (3 hp) 2B40 2B40 2B40

Pulley Center Line Distance (in.) 10.1-10.9 10.1-10.9 10.1-10.9 10.1-10.9 Speed Change Per Full Turn of

Moveable Pulley Flange (rpm) Std Fan Drive (1.5, 2, 3 hp) 33 33 33 Std Fan Drive (5 hp) 54 54 54 54 Med Static Fan Drive (1.5, 2, 3 hp) 33 33 33

Fan Shaft Diameter (in.) 1 1 1 1 HIGH PRESSURE SWITCHES (psig)

Cutout 600 10 600 10 600 10 600 10 Reset (Auto) 500 10 500 10 500 10 500 10

LOW PRESSURE SWITCHES (psig) Cutout 40 3 40 3 40 3 40 3 Reset (Auto) 60 5 60 5 60 5 60 5

RETURN AIR FILTERS QuantitySize (in.) 420x34.5x1 420x34.5x1 420x34.5x1 430x34.5x1

TXV Thermostatic Expansion Valve

11

Table 3 Physical Data 50BVT,V,W

LEGEND

UNIT 50BVT,V,W,X 034 044 054 064 NOMINAL CAPACITY (Tons) 30 40 50 60 OPERATING WEIGHT (lb)

50BVT,V50BVW 25802645 43344404 51985298 52305330 COMPRESSOR Copeland Scroll

Quantity 2 4 4 4 Number of Refrigerant Circuits 2 4 4 4 Oil (oz)

Circuit 1Circuit 2 140140 110110 140140 140140 Circuit 3Circuit 4 110110 140140 140140

REFRIGERANT TYPE R-410A Expansion Device TXV TXV TXV TXV Operating Charge (oz per Ckt) 288 160 288 288

CONDENSER (50BVT,V,W only) Tube-in-Tube Coaxial Quantity of Manifolded Circuits 2 4 4 4 Nominal Flow Rate (gpm) 90 120 150 180 Water Flow Range (gpm) 60-120 80-160 100-200 120-240 Max Water Working Pressure (psig) 400 400 400 400 Max Refrig. Working Pressure (psig) 450 450 450 450 Min Entering Water Temp (F) 50 50 50 50 Max Entering Water Temp (F) 110 110 110 110 Waterside Volume (gal) 6.0 9.0 11.3 13.5

EVAPORATOR COIL RowsFins/in. 412 312 412 412 Total Face Area (sq ft) 23.2 46.4 46.4 46.4

EVAPORATOR FAN QuantitySize 118x18 218x18 218x18 218x18 Type Drive Belt Belt Belt Belt Nominal cfm 12,000 16,000 20,000 24,000 Motor Option 1 QtyhpFrame Size 17.5213T 27.5213T 27.5213T 27.5213T Motor Option 2 QtyhpFrame Size 110215T 210215T 210215T 210215T Motor Option 3 QtyhpFrame Size 115254T 215254T 215254T 215254T Motor Option 4 QtyhpFrame Size 120256T 220256T 220256T Motor Nominal rpm 1750 1750 1750 1750 Fan Drive RPM Range

Standard (7.5 hp) 780-960 780-960 780-960 780-960 Standard (10, 15, 20 hp), Med Static (7.5 hp) 805-991 805-991 805-991 805-991 Med Static (10, 15, 20 hp), High Static (7.5 hp) 960-1146 960-1146 960-1146 960-1146 High Static (10, 15, 20 hp) 1119-1335 1119-1335 1119-1335 1119-1335

Motor Bearing Type Ball Ball Ball Ball Maximum Allowable rpm 1450 1450 1450 1450 Motor Pulley Pitch Diameter

Std Fan Drive (7.5 hp) 5.2-6.4 5.2-6.4 5.2-6.4 5.2-6.4 Std Fan Drive (10, 15, 20 hp), Med Static (7.5 hp) 4.8-6.0 4.8-6.0 4.8-6.0 4.8-6.0 Med Static Fan Drive (10, 15, 20 hp), High Static (7.5 hp) 5.8-7.0 5.8-7.0 5.8-7.0 5.8-7.0 High Static Fan Drive (10, 15, 20 hp) 5.8-7.0 5.8-7.0 5.8-7.0 5.8-7.0

Motor Shaft Diameter (in.) (7.5, 10 hp) 13/8 13/8 13/8 13/8 Motor Shaft Diameter (in.) (15, 20 hp) 15/8 15/8 15/8 15/8 Belt, QtyTypeLength (in.)

Std Fan Drive (7.5 hp) 2B48 2...B...48 2B48 2B48 Std Fan Drive (10, 15, 20 hp), Med Static (7.5 hp) 2B46 2B46 2B46 2B46 Med Static Fan Drive (10, 15, 20 hp), (High Static 7.5 hp) 2B48 2B48 2B48 2B48 High Static Fan Drive (10, 15, 20 hp) 2B45 2B45 2B45 2B45

Pulley Center Line Distance (in.) 10.2-11.4 10.2-11.4 10.2-11.4 10.2-11.4 Speed Change Per Full Turn of Moveable Pulley Flange (rpm)

Std Fan Drive (7.5 hp) 36 36 36 36 Std Fan Drive (10, 15, 20 hp), Med Static (7.5 hp) 31 31 31 31 Med Static Fan Drive (10, 15, 20 hp), High Static (7.5 hp) 31 31 31 31 High Static Fan Drive (10, 15, 20 hp) 36 36 36 36

Fan Shaft Diameter (in.) 17/16 17/16 17/16 17/16

HIGH PRESSURE SWITCHES (psig) Cutout 600 10 600 10 600 10 600 10 Reset (Auto) 500 10 500 10 500 10 500 10

LOW PRESSURE SWITCHES (psig) Cutout 40 3 40 3 40 3 40 3 Reset (Auto) 60 5 60 5 60 5 60 5

RETURN AIR FILTERS QuantitySize (in.) 817x27x4 1617x27x4 1617x27x4 1617x27x4

TXV Thermostatic Expansion Valve

12

Fig. 7 50BVC,J,Q020-028 with Optional Waterside Economizer Dimensions

NOTES: 1. Dimensions in inches [mm]. 2. Refer to base unit certified drawing for additional unit dimensions, service

clearance, and alternate airflow configurations.

22.93 [608]

A50-9189

13

Fig. 8 50BVC,J,Q034 with Optional Waterside Economizer Dimensions

NOTES: 1. Dimensions in inches [mm]. 2. Refer to base unit certified drawing for additional unit dimensions, service

clearances, and alternate airflow configurations.

50BV(C)(Q)(J) 034

a50-9190

14

Step 3 Install Ductwork The VAV units must use a pair of pants configuration as shown in Fig. 9. Refer to the Carrier System Design Manual or ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engi- neers) standards for the recommended duct connection to unit with 2 fans.

A supply air outlet collar and return air duct flange are pro- vided on all units to facilitate duct connections. Refer to dimen- sional drawings (Fig. 2-8) for connection sizes and locations.

A flexible canvas duct connector is recommended on both supply and return air sides of the units to be connected to the system ductwork.

All metal ductwork should be adequately insulated to avoid heat loss or gain and to prevent condensation from forming on the duct walls. Uninsulated ductwork is not recommended, as the units performance will be adversely affected.

Do not connect discharge ducts directly to the blower outlet(s). The factory filter should be left in place on a free return system.

If the unit will be installed in a new installation, the duct system should be designed in accordance with the System De- sign Manual, Part 2 and with ASHRAE (American Society of Heating, Refrigeration and Air-Conditioning Engineers) proce- dures for duct sizing. If the unit will be connected to an existing duct system, check that the existing duct system has the capaci- ty to handle the required airflow for the unit application at an acceptable system static pressure. If the existing duct system is too small, larger ductwork must be installed.

The duct system and diffusers should be sized to handle the design airflow volumes quietly. To maximize sound attenuation

of the units blower(s), the supply and return air plenums should be insulated for a length of at least 15 ft from the unit. Direct line of sight from return air grilles into the units return should be avoided. If return air is to be ducted to an equipment room, an elbow should be installed within the equipment room. Running a return air drop to near the floor of the room will aid in sound attenuation. Avoid transmitting vibrations generated by the movement of air in the ducting to the walls of the building. This is especially important where ductwork penetrates walls. The maximum recommended return air velocity is 1,000 fpm. Lower return air velocities will result in lower sound power levels. The use of round supply duct plenums should be considered, as it will significantly reduce low frequency sound at the equipment room. If rectangular supply plenums are used, the aspect ratio of the duct should be kept as small as possible (i.e., as close to square as possible). The large, flat surface areas associated with large aspect ratio duct systems will transmit sound to the space, and the potential for duct-generated noise is increased. The max- imum recommended supply air duct velocity is 2,000 fpm.

Units with two fans should have a properly designed pair of pants duct connection. An adequate straight length of ducting from the unit should be allowed before elbows are installed. If connecting an elbow directly to the fan outlet, a minimum straight length of 2 fan diameters from the fan outlet is recommended. Elbows should turn in the direction of fan ro- tation, if possible. Abrupt turns will generate air turbulence and excessive noise. Turning vanes should be used in all short radi- us bends. Ensure that ducting does not obstruct access to the unit for routine servicing. DUCT STATIC PRESSURE PROBE AND TUBING (VAV ONLY) On VAV systems, the duct static pressure sensor and tubing are field-mounted. The sensor tubing sensing point should be located near the end of the main supply trunk duct in a position free from turbulence effects and at least 10 duct diameters downstream and 4 duct diameters upstream from any major transitions or branch take-offs. Incorrectly placing the sensing point could result in improper operation of the entire VAV system.

Install the factory-supplied duct static pressure probe with the tip facing into the airflow. See Fig. 10.

Use 1/4-in. OD approved polyethylene tubing for up to 50 ft (3/8-in. OD for 50 to 100 ft) to connect the probe to the bulkhead fitting mounted above the unit display panel. Carefully route the tubing from the probe to this bulkhead fitting.

The static pressure control should be adjusted so that, at full airflow, all of the remote VAV terminal boxes receive the minimum static pressure required plus any downstream resis- tance. Control the system to the lowest static pressure set point that will satisfy airflow requirements. Lower static pressure set points reduce total required brake horsepower and reduce generated sound levels.

Fig. 9 Typical Fan Discharge Connections for Multiple Fan Units

A B

a50-8357.eps

NOTE: A = 11/2 to 21/2B

AIRFLOW

PROBE

TUBING

Fig. 10 Duct Static Pressure Probe

a50-7138ef

15

DUCT HIGH-STATIC (DHS) LIMIT SWITCH (VAV ONLY) The duct high static limit switch is a mechanical safety that prevents duct overpressurization. The switch is op- tional and is field-provided.

Step 4 Make Piping Connections CONDENSER WATER PIPING (WATER-COOLED ONLY) Always follow national and local codes when in- stalling water piping to ensure a safe and proper installation. Connections to the unit should incorporate vibration elimina- tors to reduce noise and vibration to the building, and shutoff valves to facilitate servicing.

Prior to connecting the unit(s) to the condenser water system, the system should be flushed to remove foreign material that could cause condenser fouling. Install a screen strainer with a minimum of 20 mesh ahead of the condenser inlet to prevent condenser fouling and internal condenser tube damage from foreign material.

Supply and return water piping must be at least as large as the unit connections, and larger for long runs. Refer to the System Design Manual, Part 3, and standard piping practice, when sizing, planning, and routing water piping. See dimension drawings (Fig. 2-8) for water connection sizes and locations.

Units are furnished standard with a copper heat exchanger. A cupronickel heat exchanger is also available as a factory-installed option. Copper is adequate for closed loop systems where good quality water is available. In conditions where scale formation or water treatment is questionable, the optional cupronickel heat exchanger should be used. Where the water is especially corrosive or could lead to excessive fouling, intermediate plate frame heat exchangers are recommended.

The unit is capable of operating with entering water tem- peratures as low as 50 F, without the need for head pressure control. If the entering water temperature is expected to be lower, or more stable unit operation is desired, a field-supplied water-regulating valve may be used.

This unit has multiple independent refrigerant circuits with separate condensers. The individual condensers are manifolded together on the waterside to provide easy, single-point water connections. In order to achieve proper head pressure control when a water-regulating valve is used, a temperature-actuated valve is recommended. This allows any of the independent refrigerant circuits to operate while still modulating condenser water flow in response to loop water temperature.

A glycol solution should be used if ambient temperatures are expected to fall below freezing or if the loop water tem- perature is below 50 F while operating. Refer to Table 4, which lists freezing points of glycol at different concentrations. A

minimum concentration of 20% is recommended. Water pressure drop will increase and unit performance will decrease with increasing glycol concentrations.

Units with factory-installed waterside economizers have cooling water passing through the economizer and condenser in series while operating in the economizer mode. During normal operation, water bypasses the economizer coil.

Table 4 Glycol Freezing Points

All manual flow valves used in the system should be of the ball valve design. Globe or gate valves must not be used due to high pressure drops and poor throttling characteristics.

Do not exceed recommended condenser fluid flow rates shown in Tables 5 and 6. Serious damage or erosion of the heat exchanger tubes could occur. Piping systems should not exceed 10 fps fluid velocities to ensure quietness and tube wall integri- ty. Refer to Tables 5 and 6 for condenser water pressure drop versus flow rate. Flow rates outside of the published range should not be used.

Table 5 Condenser Pressure Drop 50BVC,J,Q Units

Table 6 Condenser Pressure Drop 50BVT,V,W Units

IMPORTANT: Use tubing that complies with local codes. Improper location or installation of the supply duct pressure tubing will result in unsatisfactory unit operation and poor performance.

CAUTION

Galvanized pipe or fittings are not recommended with 50BV units due to the possibility of galvanic corrosion caused by dissimilar metals. When selecting piping materials, use only approved piping materials that meet applicable codes and that will handle the temperatures and pressures that may be experienced in the application. Piping systems will sweat if low temperature fluid is used in the system. For these applications, supply and return water piping should be insulated to protect from condensa- tion damage. The minimum recommended entering water temperature to the unit is 50 F.

% GLYCOL FREEZE POINT ( F)

ETHYLENE GLYCOL PROPLYLENE GLYCOL 20 18 19 30 7 9 40 7 5 50 28 27

FLOW RATE (GPM)

SIZE 020 SIZE 024 SIZE 028 SIZE 034 PRESSURE DROP (FT WG)

35 9.1 40 11.2 6.0 45 13.5 7.5 50 15.9 9.1 9.1 55 18.4 10.9 10.9 60 21.1 12.8 12.8 10.8 65 23.9 14.8 14.9 12.7 70 27.4 17.0 17.2 14.7 75 19.3 19.6 16.9 80 21.7 22.2 19.2 85 24.9 21.7 90 27.8 24.3 95 30.8 27.1

100 34.0 30.0 105 33.1 110 36.3 115 39.7 120 43.2

FLOW RATE (GPM)

SIZE 034 SIZE 044 SIZE 054 SIZE 064 PRESSURE DROP (FT WG)

60 8.7 70 11.9 80 15.5 6.3 90 19.6 8.0

100 24.2 9.9 6.0 110 29.3 12.0 7.3 120 34.9 14.3 8.7 8.7 130 16.7 10.2 10.2 140 19.4 11.8 11.8 150 22.3 13.6 13.6 160 25.3 15.5 15.5 170 17.4 17.4 180 19.6 19.6 190 21.8 21.8 200 24.2 24.2 210 26.6 220 29.2 230 31.9 240 34.8

16

Ball valves should be installed in the supply and return lines for unit isolation and water flow balancing.

Pressure and temperature ports are recommended in both the supply and return lines for system flow balancing. These openings should be 5 to 10 pipe diameters from the unit water connections. For thorough mixing and temperature stabiliza- tion, wells in the water piping should extend at least 1/2 pipe diameter into the pipe. Measuring the condenser waterside pressure drop and referring to Tables 5 and 6 can help to prop- erly set the water flow rate.

Improper fluid flow due to valving, piping, or improper pump operation constitutes abuse that may result in voiding of unit warranty. The manufacturer will not be responsible for damages or failures resulting from improper piping design or piping material selection. EVAPORATOR CONDENSATE DRAIN The conden- sate drain connection is 11/4-in. FPT and is located on the same side of the unit as the condenser water connections. See dimension drawings (Fig. 2-8) for exact location.

Drain lines should be pitched away from the unit with a minimum slope of 1/8-in. per foot and conform to all local and national codes.

A trap must be installed in the condensate line to ensure free condensate flow (units are not internally trapped). A vertical air vent is sometimes required to avoid air pockets.

Install a condensate-trapping drain line at the units drain connection. See Fig. 11 for correct drain layout.

When calculating trap depth, remember that it is not the total static pressure but the upstream or downstream static resistance that is trapped against. For instance, when calculat- ing the trap depth for a cooling coil condensate pan, trap against the coil pressure drop in that coil section and any other pressure drops upstream of it.

If calculating the trap depth for the cooling coil, use the total static pressure drop (coil plus any other components upstream of it) plus 1 in. (P1 = negative static pressure + 1 in.), as shown in Fig. 11.

Traps must store enough condensate to prevent losing the drain seal at start-up. The Minimum 1/2 P1 dimension ensures that enough condensate is stored.

Drain pans should be cleaned periodically to avoid the build-up of dirt and bacterial growth.

HOT WATER HEATING COIL (OPTIONAL) A factory- installed one or 2-row hot water heating coil is available as an op- tion. The coil is supplied with hot water from a boiler through sep- arate piping from the condenser water loop. All controls for heat- ing operation are field-supplied.

Piping should be in accordance with accepted industry stan- dards and all components rated for the system pressure expected. Pipe coils so that they will drain, and provide a drain and vent.

Always connect the supply to the top of the coil, and the return to the bottom. Refer to Fig. 2-8 for hot water supply and return piping locations.

Water coils should not be subjected to entering-air tempera- tures below 38 F to prevent coil freeze-up. If air temperatures across the coil are going to be below this value, use a glycol or brine solution. Use a solution with the lowest concentration that will match the coldest air expected. Excess concentrations will greatly reduce coil capacity.

The return air duct system should be carefully designed to get adequate mixing of the return air and outdoor air streams to prevent cold spots on the coil that could freeze.

A 2 or 3-way, field-supplied modulating control valve or a simple two-position on-off valve may be used to control water flow. Select the valve based on the control valve manufactur- ers recommendations for size and temperature rating. Select the control valve CV based on pressure drop and flow rate through the coil. This information is available from the SCU- Builder software program or Tables 7 and 8.

Pipe sizes should be selected based on the head pressure available from the pump. Water velocity should not exceed 8 fps. Design the piping system for approximately 3 ft of loss per 100 equivalent ft of pipe. The piping system should allow for expansion and minimize vibration between the unit and piping system. WATERSIDE ECONOMIZER (OPTIONAL) The option- al waterside economizer (pre-cooling coil) is factory-installed and piped internally, in series with the condenser water circuit (Fig. 12). A diverting valve and factory controls are included with the option. Only one set of field connections needs to be made for condenser water and economizer water. In addition, when unit is shipped with economizer option, the economizer drain must be connected to a separate trap. Follow the same steps for the economizer drain as described for evaporator condensate drain. An aquastat is used to modulate water flow through the economizer. The controller is mounted to the low voltage control box. Electrical connections are factory installed and wired. The remote bulb is shipped internal to the unit and requires field mounting. Care should be taken not to dent the bulb or miscali- bration may occur. The aquastat has a temperature range adjust- ment (30 F to 100 F) and is field set. See Fig. 2-8 for connection locations and sizes. See Tables 9 and 10 for economizer water- side pressure drop data.

1/2

P1

P1

NOTE: P1 equals negative static pressure plus 1 inch.

Fig. 11 Condensate Drain Layout

a39-2371ef

17

Table 7 Hot Water Pressure Drop 50BVC,J,Q Units

Table 8 Hot Water Pressure Drop 50BVT,V,W Units

Table 9 Economizer Pressure Drop Curve (ft wg), 50BVC,J,Q Units

Table 10 Economizer Pressure Drop Curve (ft wg), 50BVT,V,W Units

FLOW RATE (GPM)

SIZE 020 SIZE 024 SIZE 028 SIZE 034 PRESSURE DROP (FT WG)

10 0.7 0.7 0.7 15 1.5 1.5 1.5 20 2.6 2.6 2.6 25 4.0 4.0 4.0 30 5.8 5.8 5.8 0.1 35 7.8 7.8 7.8 0.1 40 10.2 10.2 10.2 0.1 45 12.9 12.9 12.9 0.2 50 15.8 15.8 15.8 0.2 55 0.3 60 0.3 65 0.4

FLOW RATE (GPM)

SIZE 034 SIZE 044 SIZE 054 SIZE 064 PRESSURE DROP (FT WG)

45 2.4 50 3.0 55 3.6 60 4.3 65 5.0 70 5.7 75 6.6 80 7.4 85 8.4 90 9.3 2.5 2.5 2.5

100 3.1 3.1 3.1 110 3.7 3.7 3.7 120 4.4 4.4 4.4 130 5.1 5.1 5.1 140 5.9 5.9 5.9 150 6.7 6.7 6.7 160 7.6 7.6 7.6 170 8.6 8.6 8.6 180 9.6 9.6 9.6

FLOW RATE (GPM)

SIZE 020 SIZE 024 SIZE 028 SIZE 034 PRESSURE DROP (FT WG)

35 8.9 40 11.5 11.0 45 14.4 13.8 50 17.6 16.9 16.9 55 21.1 20.4 20.4 60 24.9 24.1 24.1 3.5 65 29.0 28.1 28.2 4.1 70 34.4 32.5 32.5 4.7 75 37.1 37.2 5.4 80 42.1 42.1 6.1 85 47.4 6.9 90 52.9 7.7 95 58.7 8.5

100 64.9 9.4 105 10.3 110 11.3 115 12.3 120 13.4

FLOW RATE (GPM)

SIZE 034 SIZE 044 SIZE 054 SIZE 064 PRESSURE DROP (FT WG)

60 13.1 70 17.9 80 23.5 5.8 90 29.8 7.3

100 36.9 9.1 9.0 110 44.8 11.0 11.0 120 53.4 13.1 13.1 13.1 130 15.4 15.4 15.4 140 17.9 17.9 17.9 150 20.6 20.6 20.6 160 23.5 23.5 23.5 170 26.6 26.5 180 29.8 29.8 190 33.3 33.2 200 36.9 36.8 210 40.7 220 44.7 230 48.9 240 53.3

FLUID IN

N.O.

AQUASTAT MBV

BULB STRAPPED TO FLUID IN LINE (FIELD INSTALLED)

N.O.

N.C.

3-WAY MOTORIZED BALL VALVE

WATERSIDE ECONOMIZER

COIL

FLUID TO REFRIGERANT HEAT EXCHANGER

POSITIVE SHUT-OFF SOLENOID VALVE FOR VARIABLE SPEED PUMPING SYSTEM (FIELD INSTALLED)

a50-7269ef

Fig. 12 Optional Water Economizer

18

Step 5 Complete Electrical Connections Verify that electrical requirements listed on the unit nameplate match available power supply. The unit voltage must be within the range shown in Tables 11-13 and phases must be balanced within 2%. Contact the local power company for line voltage corrections. Never operate a motor where a phase imbalance in supply voltage is greater than 2%.

For an unbalanced 3-phase supply voltage, use the follow- ing formula to determine the percent of voltage imbalance: Percent Voltage Imbalance

Example: Supply voltage is 460-3-60. AB = 452 V BC = 464 V AC = 455 V

Determine maximum deviation from average voltage: (AB) 457 452 = 5 V (BC) 464 457 = 7 V (AC) 457 455 = 2 V Maximum deviation is 7 V. Determine percent of voltage imbalance: % Voltage Imbalance = 100 x

= 1.53% This amount of phase imbalance is satisfactory as it is be-

low the maximum allowable 2%.

POWER WIRING Properly sized fuses or HACR (Heat- ing, Air-Conditioning and Refrigeration) circuit breakers must be installed for branch circuit protection, according to the na- tional and applicable local codes. See unit nameplate and Ta- bles 11 and 12 for maximum overcurrent protection size.

These units are provided with single point, main power supply terminal blocks. Refer to Fig. 2-8 for conduit con- nection locations. Connect the power leads as indicated on the unit wiring diagrams (found in the Troubleshooting sec- tion) and be certain to connect the ground lead to the ground lug in the unit high voltage electrical box. Refer to Tables 11-13 for unit electrical data.

Modular Units For units with multiple main air- conditioning sections, connect the high voltage compressor power wiring to the line side of the high voltage terminal block in the second sections high voltage electrical box. This wiring is located in the upper portion of the compressor compartment.

Connect the low voltage wiring, located in the compressor compartment, between the two air-conditioning sections using the quick connects provided.

For the supply fan motor, connect the 3-phase high voltage wiring, coiled behind the high voltage panel, to the line side of the supply fan motor terminal block located in the fan compart- ment. For VAV units, connect the 3-phase high voltage wiring to the line side of VFD.

For units with multiple fans, connect the control power wiring with the quick connects provided at the fan compart- ment junction.

CONTROL WIRING (CV ONLY) A standard commer- cial thermostat controls constant volume units. These units turn compressors on or off in response to zone temperature. The 50BV units provide 2 stages of cooling.

50BVC,Q020-034 and 50BVT,V034 Only These models have 2 independent refrigerant circuits, each capable of being staged independently. Thermostat wiring is connected to the 6- position low voltage terminal block located in the unit electrical box. The 50BV units have a 24-vac control transformer, which provides power to the control circuit and to the thermostat. The thermostat connections and their functions are as follows:

C Transformer 24-vac Common O Reversing Valve (heat pumps only) Y1 1st Stage Compressor Contactor Y2 2nd Stage Compressor Contactor R Transformer 24-vac Hot G Indoor Fan Contactor Select an appropriate commercial thermostat that has 2 stag-

es of cooling control. If the unit is a heat pump, make sure the thermostat is capable of heat pump control.

Install the thermostat in the space where the temperature is being controlled, according to the instructions provided with the thermostat.

To wire the thermostat: 1. Connect the C terminal from the 50BV unit to the C

terminal on the thermostat. 2. Wire the Y1 and Y2 terminals from the 50BV unit

to the Y1 and Y2 terminals, respectively, at the thermostat.

3. Make a connection between the G terminal on the unit and the G terminal on the thermostat.

4. Attach a wire from the R terminal at the unit to the R terminal at the thermostat.

5. 50BVQ and 50BVV ONLY: If the unit is a heat pump, connect a final wire from terminal O on the heat pump unit to the W1/O/B terminal at the thermostat. Configure the thermostat for heat pump operation using the installation instructions provided with the thermostat. Set the reversing valve polarity of the thermostat to O.

See Fig. 13 for typical thermostat wiring.

50BVT,V044-064 Only Unit sizes 044-064 have 4 inde- pendent refrigerant circuits. These units can be controlled using a standard commercial, 2-stage thermostat. In this case, the first stage of cooling will turn on compressors 1 and 2, and the second stage will turn on compressors 3 and 4. It is also possible to have 4 stages of cooling, using a suit- able field-supplied control method.

For 2-stage thermostat wiring, refer to Fig. 14. Jumpers must be installed between the G and O terminals in Modules A and B. A field-supplied, 24-v pilot relay should be used to en- ergize Y2 on Module B whenever Y1 is energized on Module A. Similarly, a field-supplied 24-v pilot relay should be in- stalled to energize Y4 on Module B whenever Y3 on Module A is energized (Y2 stage of thermostat calls for cooling).

Finally, verify that transformer phasing is consistent between Modules A and B.

= 100 x max voltage deviation from average voltage

average voltage

Average Voltage = 452 + 464 + 455

3

= 1371

3 = 457

IMPORTANT: If supply voltage phase imbalance is more than 2%, contact the local electric utility com- pany immediately.

7 457

WARNING

Before wiring the thermostat to the unit, make sure that main power to the unit has been disconnected. Failure to heed this warning could result in personal injury.

19

Table 11 Electrical Data 50BVC,Q

LEGEND

50BV UNIT SIZE (C, Q)

NOMINAL VOLTAGE (3 PH, 60 HZ)

VOLTAGE RANGE COMPRESSOR INDOOR FAN MOTOR

MIN CIRCUIT AMPS MAX FUSE FLA MIN MAX QUANTITY RLA LRA QUANTITY FLA HP

020

208/230 187 253 2 29.5 195

2 4.8 1 76.0 100 68.6

2 6.2 2 78.8 100 71.4

2 9.2 3 84.8 110 77.4

2 12.2 5 90.8 120 83.4

460 414 506 2 14.7 95

2 2.4 1 37.9 50 34.2

2 3.1 2 39.3 50 35.6

2 4.3 3 41.7 55 38.0

2 6.1 5 45.3 60 41.6

575 518 633 2 12.2 80

2 2.0 1 31.5 40 28.4

2 2.6 2 32.7 40 29.6

2 3.7 3 34.9 45 31.8

2 5.4 5 38.3 50 35.2

024

208/230 187 253 2 30.1 225

2 6.2 2 80.1 110 72.6

2 9.2 3 86.1 110 78.6

2 12.2 5 92.1 120 84.6

460 414 506 2 16.7 114

2 3.1 2 43.8 60 39.6

2 4.3 3 46.2 60 42.0

2 6.1 5 49.8 60 45.6

575 518 633 2 12.2 80

2 2.6 2 32.7 40 29.6

2 3.7 3 34.9 45 31.8

2 5.4 5 38.3 50 35.2

028

208/230 187 253 2 48.1 245 2 9.2 3 126.6 170 114.6

2 12.2 5 132.6 180 120.6

460 414 506 2 18.6 125 2 4.3 3 50.5 60 45.8

2 6.1 5 54.1 70 49.4

575 518 633 2 14.7 100 2 3.7 3 40.5 50 36.8

2 5.4 5 43.9 50 40.2

034

208/230 187 253 2 55.8 340 2 9.2 3 144.0 190 130.0

2 12.2 5 150.0 200 136.0

460 414 506 2 26.9 173 2 4.3 3 69.1 90 62.4

2 6.1 5 72.7 90 66.0

575 518 633 2 23.7 132 2 3.7 3 60.7 80 54.8

2 5.4 5 64.1 80 58.2

FLA Full Load Amps HP Horsepower LRA Locked Rotor Amps RLA Rated Load Amps

20

Table 12 Electrical Data 50BVJ

LEGEND

50BV UNIT SIZE (J)

NOMINAL VOLTAGE (3 PH, 60 HZ)

VOLTAGE RANGE COMPRESSOR INDOOR FAN MOTOR

MIN CIRCUIT AMPS MAX FUSE FLA MIN MAX QUANTITY RLA LRA QUANTITY FLA HP

020

208/230 187 253 2 29.5 195

2 6.2 2 78.8 100 71.4

2 8.8 3 84.0 110 76.6

2 13.5 5 93.4 120 86.0

460 414 506 2 14.7 95

2 3.1 2 39.3 50 35.6

2 4.3 3 41.7 55 38.0

2 6.2 5 45.5 60 41.8

024

208/230 187 253 2 30.1 225

2 6.2 2 80.1 110 72.6

2 8.8 3 85.3 110 77.8

2 13.5 5 94.7 120 87.2

460 414 506 2 16.7 114

2 3.1 2 43.8 60 39.6

2 4.3 3 46.2 60 42.0

2 6.2 5 50.0 60 45.8

028

208/230 187 253 2 48.1 245 2 8.8 3 125.8 170 113.8

2 13.5 5 135.2 180 123.2

460 414 506 2 18.6 125 2 3.1 2 48.1 60 43.4

2 4.3 3 50.5 60 45.8

034

208/230 187 253 2 55.8 340 2 8.8 3 143.2 200 129.2

2 13.5 5 152.6 200 138.6

460 414 506 2 26.9 173 2 3.1 2 66.7 90 60.0

2 4.3 3 69.1 90 62.4

FLA Full Load Amps HP Horsepower LRA Locked Rotor Amps RLA Rated Load Amps

21

Table 13 Electrical Data 50BVT,V,W

LEGEND

UNIT SIZE (T, V, W)

NOMINAL VOLTAGE

(3 PH, 60 HZ)

VOLTAGE RANGE COMPRESSOR INDOOR FAN MOTOR MIN

CIRCUIT AMPS

MAX FUSE FLA MIN MAX QUANTITY RLA LRA QUANTITY FLA HP

034

208/230 187 253 2 50.6 325

1 19.4 7.5 152.7 175 120.6

1 25.8 10 165.5 190 127.0

1 38.6 15 191.1 200 139.8

1 49.6 20 213.1 200 150.8

460 414 506 2 26.9 173

1 9.7 7.5 70.2 90 63.5

1 12.9 10 73.4 100 66.7

1 19.3 15 79.8 100 73.1

1 24.8 20 85.3 110 78.6

575 518 633 2 23.7 132

1 7.8 7.5 61.1 80 55.2

1 10.3 10 63.6 80 57.7

1 15.4 15 68.7 90 62.8

1 19.8 20 73.1 90 67.2

044

208/230 187 253 4 33.3 239

2 19.4 7.5 180.3 200 172.0

2 25.8 10 193.1 225 184.8

2 38.6 15 218.7 250 210.4

460 414 506 4 17.9 125

2 9.7 7.5 95.5 110 91.0

2 12.9 10 101.9 110 97.4

2 19.3 15 114.7 125 110.2

575 518 633 4 12.8 80

2 7.8 7.5 70.0 80 66.8

2 10.3 10 75.0 80 71.8

2 15.4 15 85.2 90 82.0

054

208/230 187 253 4 48.1 245

2 19.4 7.5 243.2 250 231.2

2 25.8 10 256.0 300 244.0

2 38.6 15 281.6 300 269.6

2 49.6 20 303.6 350 291.6

460 414 506 4 18.6 125

2 9.7 7.5 98.5 110 93.8

2 12.9 10 104.9 110 100.2

2 19.3 15 117.7 125 113.0

2 24.8 20 128.7 125 124.0

575 518 633 4 14.7 100

2 7.8 7.5 78.1 90 74.4

2 10.3 10 83.1 90 79.4

2 15.4 15 93.3 100 89.6

2 19.8 20 102.1 110 98.4

064

208/230 187 253 4 50.6 325

2 19.4 7.5 253.9 300 241.2

2 25.8 10 266.7 300 254.0

2 38.6 15 292.3 300 279.6

2 49.6 20 314.3 350 301.6

460 414 506 4 26.9 173

2 9.7 7.5 133.7 150 127.0

2 12.9 10.0 140.1 150 133.4

2 19.3 15.0 152.9 175 146.2

2 24.8 20.0 163.9 175 157.2

575 518 633 4 23.7 132

2 7.8 7.5 116.3 140 110.4

2 10.3 10.0 121.3 140 115.4

2 15.4 15.0 131.5 150 125.6

2 19.8 20.0 140.3 150 134.4

FLA Full Load Amps HP Horsepower LRA Locked Rotor Amps RLA Rated Load Amps

22

REMOTE CONDENSER FAN CONTACTOR WIR- ING For unit sizes 020-034, one remote condenser is re- quired. Install a field-supplied 24-v pilot relay (Aux relay) be- tween Y1 and C. This will energize the FC contactor on the re- mote condenser whenever there is a call for cooling.

For unit sizes 044-064, 2 remote condensers are required. Be sure to make piping connections so that compressors 1 and 2 are connected to condenser 1, and compressors 3 and 4 are connect- ed to condenser 2. Use an additional set of NO (normally open) contacts on PR1 to energize FC1 on condenser 1, and a set of NO contacts on PR2 to energize FC1 on condenser 2. CONTROL WIRING (VAV ONLY) The VAV units are designed to operate either with a building management system or stand alone (local control). See Table 14 for ca- ble recommendations. NOTE: Conductors and drain wire must be at least 20 AWG (American Wire Gage), stranded, and tinned copper. Individual conductors must be insulated with PVC, PVC/nylon, vinyl, Teflon*, or polyethylene. An aluminum/polyester 100% foil shield and an outer jacket of PVC, PVC/nylon, chrome vinyl, or Teflon with a minimum operating temperature range of 20 C to 60 C is required.

The communication bus shields must be tied together at each system element. If the communication bus is entirely within one building, the resulting continuous shield must be connected to ground at only one single point. If the communi- cation bus cable exits from one building and enters another

building, the shields must be connected to the grounds at a lightning suppressor in each building (one point only).

Wiring Control Devices Standard controls require no field wiring. Standard controls for VAV applications include: duct static pressure (DSP), compressor status (CHC1FLD), supply fan start/stop (SF), and supply fan speed (SPEED).

Field-installed devices and the factory-supplied supply air temperature sensor (required) will be wired in the field to the units direct digital control.

TYPICAL UNIT

C

G

Y1

O

R

Y2

24 VAC COMMON

FAN RELAY

COMPRESSOR RELAY

HEAT PUMP

24 VAC RETURN

2nd STAGE COMPRESSOR RELAY

Y2 R W1 Y1 G C

THERMOSTAT B O

Fig. 13 Typical Wiring Unit Sizes 020-034 (Two-Stage Cooling Units)

a50-7272ef

Fig. 14 Typical Wiring 40 to 60 Ton Units (Two-Stage Cooling)

a50-7273ef

LEGEND FC Fan Contactor PR Pilot Relay

C O Y1 Y3 R G C O Y2 Y4

C O Y1 Y2 R G

PR2

PR1

PR1

PR2

FIELD-SUPPLIED THERMOSTAT

UNIT MODULE A UNIT MODULE B

Remote Condenser Units Only

PR1

PR2

FC1-4 FC1-5

FC1-4 FC1-5

(#1)

(#2)

R G

*Teflon is a registered trademark of E.I. du Pont de Nemours and Company.

23

Table 14 Recommended Cables

SUPPLY AIR TEMPERATURE SENSOR (SAT) The supply air temperature sensor is used to measure the tempera- ture of the air leaving the unit. The sensor should be located in the supply air duct, about 1 ft from the unit discharge connec- tion (Fig. 15). On units with 2 fans, locate the sensor approxi- mately 5 duct diameters downstream from pair of pants duct connection, allowing for adequate mixing of supply air.

Mount the sensor as follows: 1. Remove the cover of the sensor junction box. 2. Drill a 7/16-in. hole at the selected location. 3. Install the sensor through the hole and secure using 2

no. 8 screws (provided). Do not overtighten. 4. Connect the sensor to the control box. Use an 18 or

20 AWG, 2 conductor, twisted pair cable. This cable is suitable for distances of up to 500 feet.

Connect the field wires to the supply air sensor using wire nuts or closed end style crimp connectors. Do not cut the sensor leads. Use the full length of lead supplied on the sensor.

In the control box, remove the jacket from the cable. Route the sensor wires over to the right side of the field terminal block (TB2). Strip the insulation back about 1/4-in. from each conductor. Connect the two wires to terminals 101 and 102 (SAT) on the terminal board. Polarity is not a consideration. See Table 15 for resistance vs. temperature values.

SMOKE DETECTOR/FIRE ALARM SHUTDOWN (FSD) To allow a smoke detector to shut the 50BV unit down, field terminate the sensor on IN-1 of the I/O Flex EX8160 expander. Use the BACview tool to enable its op- eration. REMOTE OCCUPANCY (ROCC) The 50BV unit may be commanded by another control system or a twist timer to become occupied and run when a set of dry contacts close. In order for this to occur, wire the NO dry contacts to UI-12 on the I/O Flex 6126 controller. From the BACview setup screen, configure the occupancy command to be Digital Input. RETURN AIR TEMPERATURE (RAT) SENSOR The return air temperature sensor is a 10K at 77 F temperature sen- sor used as the space control point. Refer to supply/discharge air control sequence of operation for the RAT functionality and configuration. Refer to Fig. 16.

MANUFACTURER PART NUMBER Alpha 2413 or 5463

American A22503 Belden 8772

Columbia 02525

39-312d Fig. 15 Supply-Air Temperature Sensor

Installation (Unit Discharge Location)

NOTE: All dimensions are in inches.

Fig. 16 Return Air Temperature Sensor

a50-7274ef

1.00

8.00

0.81 1.25

0.22 0.25

0.50

2.25

65

O0.187 O0.187 (2 HOLES)

24

Table 15 Thermistor Resistance vs Temperature Values for Supply-Air and Return Air Temperature Sensor (10,000 ohms)

START-UP

General Complete the Start-Up Checklist on page CL-1 before attempting system start-up. CRANKCASE HEATERS The 50BVT,V,W,34-064 units include crankcase heaters. Crankcase heaters are ener- gized as long as there is power to the unit.

Wait 24 hours before starting the compressors to permit warming by the crankcase heaters.

AFTER 24 hours, continue with the procedures below. CONFIRM THE INPUT POWER PHASE SEQUENCE The input power phase rotation sequence must be L1-L2-L3 = ABC (or forward or clockwise) as indicated with a phase rotation meter. Incorrect input phase rotation will cause the com- pressors to rotate in reverse, which results in no cooling capacity.

If the compressor is rotating in the wrong direction, it may: emit increased noise; shut down due to internal overload protection; have only a small decrease in suction pressure when it starts; or have only a small increase in discharge pressure when it starts. Also, no cooling will be produced at the evaporator. If any of these conditions occurs, refer to the Service section to correct the compressor rotation before continuing. INTERNAL WIRING Check all electrical connections in unit control boxes; tighten as required. RETURN-AIR FILTERS Check that correct filters are installed in filter tracks (see Tables 2 and 3). Do not operate unit without return-air filters. COMPRESSOR MOUNTING Compressors are internal- ly mounted on resilient rubber supports. Do not loosen or re- move compressor holddown bolts. REFRIGERANT SERVICE PORTS Each refrigerant sys- tem has a total of 2 Schrader-type service gage ports per circuit. One port is located on the suction line, and one on the compres- sor discharge line. Be sure that caps on the ports are tight.

TEMP (C)

TEMP (F)

RESISTANCE (OHMS)

TEMP (C)

TEMP (F)

RESISTANCE (OHMS)

TEMP (C)

TEMP (F)

RESISTANCE (OHMS)

-39 -39.44 323,839 37 2.78 28,365 113 45.00 4,367

-37 -38.33 300,974 39 3.89 26,834 115 46.11 4,182

-35 -37.22 279,880 41 5.00 25,395 117 47.22 4,006

-33 -36.11 260,410 43 6.11 24,042 119 48.33 3,838

-31 -35.00 242,427 45 7.22 22,770 121 49.44 3,679

-29 -33.89 225,809 47 8.33 21,573 123 50.56 3,525

-27 -32.78 210,443 49 9.44 20,446 125 51.67 3,380

-25 -31.67 196,227 51 10.56 19,376 127 52.78 3,242

-23 -30.56 183,068 53 11.67 18,378 129 53.89 3,111

-21 -29.44 170,775 55 12.78 17,437 131 55.00 2,985

-19 -28.33 159,488 57 13.89 16,550 133 56.11 2,865

-17 -27.22 149,024 59 15.00 15,714 135 57.22 2,751

-15 -26.11 139,316 61 16.11 14,925 137 58.33 2,642

-13 -25.00 130,306 63 17.22 14,180 139 59.44 2,538

-11 -23.89 121,939 65 18.33 13,478 141 60.56 2,438

-9 -22.78 114,165 67 19.44 12,814 143 61.67 2,343

-7 -21.67 106,939 69 20.56 12,182 145 62.78 2,252

-5 -20.56 100,218 71 21.67 11,590 147 63.89 2,165

-3 -19.44 93,909 73 22.78 11,030 149 65.00 2,082

-1 -18.33 88,090 75 23.89 10,501 151 66.11 2,003

1 -17.22 82,670 77 25.00 10,000 153 67.22 1,927

3 -16.11 77,620 79 26.11 9,526 155 68.33 1,855

5 -15.00 72,911 81 27.22 9,078 157 69.44 1,785

7 -13.89 68,518 83 28.33 8,653 159 70.56 1,718

9 -12.78 64,419 85 29.44 8,251 161 71.67 1,655

11 -11.67 60,592 87 30.56 7,866 163 72.78 1,594

13 -10.56 57,017 89 31.67 7,505 165 73.89 1,536

15 -9.44 53,647 91 32.78 7,163 167 75.00 1,480

17 -8.33 50,526 93 33.89 6,838 169 76.11 1,427

19 -7.22 47,606 95 35.00 6,530 171 77.22 1,375

21 -6.11 44,874 97 36.11 6,238 173 78.33 1,326

23 -5.00 42,317 99 37.22 5,960 175 79.44 1,279

25 -3.89 39,921 101 38.33 5,697 177 80.56 1,234

27 -2.78 37,676 103 39.44 5,447 179 81.67 1,190

29 -1.67 35,573 105 40.56 5,207 181 82.78 1,149

31 -0.56 33,599 107 41.67 4,981 183 83.89 1,109

33 0.56 31,732 109 42.78 4,766 185 85.00 1,070

35 1.67 29,996 111 43.89 4,561 187 86.11 1,034

IMPORTANT: On VAV units, fan rotation direction CANNOT be used for the phase sequence check; fan rotation for VAV units with a variable speed drive is independent of the unit input wiring sequence.

25

CV Unit Start-Up EVAPORATOR FAN Fan belt and variable pitch motor pulleys are factory installed. See Tables 16-23 for fan perfor- mance data. Be sure that fans rotate in the proper direction. COOLING Set the space thermostat to OFF position. Turn on unit power. Set space thermostat to COOL and the fan to AUTO. Adjust the thermostat temperature setting below room temperature. Compressor 1 starts on closure of contactor (com- pressors 1 and 2 on 4-circuit units with 2-stage thermostat).

Adjust the thermostat to an even lower setting until the ther- mostat energizes Y2 (the second cooling stage). Compressor 2 starts on closure of contactor (compressors 3 and 4 on 4-circuit units with 2-stage thermostat).

Adjust the thermostat temperature to a setting just below room temperature. The second stage of cooling should turn off.

Set the thermostat temperature above room temperature. All compressors and the unit fan should now be off.

Set the thermostat below room temperature and confirm that the compressors and fan turn off.

Table 16 Fan Performance 50BVC,Q020

LEGEND

NOTES: 1. Units are available with the following motor and drive combinations:

1.5, 2, 3, 5 hp standard drive; 1.5, 2, 3 hp medium static drive. For 1.5, 2, 3 hp standard drives, the drive range is 753 to 952 rpm. For medium static drives, the drive range is 872 to 1071 rpm. For 5 hp standard drives, the drive range is 967 to 1290 rpm.

2. Italics indicates field-supplied drive required. 3. Do not operate in shaded area. 4. Static pressure losses must be applied to external static pres-

sure before entering the fan performance table. 5. Interpolation is permitted: extrapolation is not. 6. Fan performance is based on filter, unit casing, and wet coil

losses. 7. Bhp values are per fan. Watts values are per motor. Unit has

2 supply fans and 2 motors.

AIRFLOW (CFM)

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 0.2 0.4 0.6 0.8 1.0

RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP 4500 623 459 0.52 5000 638 545 0.61 5500 655 641 0.72 725 755 0.85 6000 608 641 0.72 676 755 0.85 742 878 0.99 807 1001 1.13 6500 636 755 0.85 699 878 0.99 761 1010 1.14 821 1142 1.29 7000 604 774 0.87 666 906 1.02 726 1029 1.16 784 1170 1.32 841 1311 1.48 7500 634 916 1.03 693 1057 1.19 750 1189 1.34 805 1330 1.50 858 1480 1.67 8000 667 1085 1.22 723 1226 1.38 777 1377 1.55 829 1526 1.72 880 1676 1.89 8500 700 1273 1.43 753 1423 1.60 804 1573 1.77 853 1732 1.95 902 1836 2.13 9000 735 1480 1.67 785 1638 1.84 833 1745 2.02 881 1908 2.21 927 2071 2.40

AIRFLOW (CFM)

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1.2 1.4 1.6 1.8 2.0

RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP 4500 5000 5500 6000 6500 881 1283 1.44 7000 897 1451 1.63 951 1601 1.80 7500 911 1629 1.83 963 1727 2.00 1014 1881 2.18 8000 930 1781 2.07 979 1935 2.24 1028 2098 2.43 1076 2260 2.62 1124 2422 2.81 8500 950 1989 2.31 997 2152 2.50 1043 2323 2.69 1089 2485 2.88 1134 2697 3.09 9000 973 2233 2.59 1018 2404 2.79 1062 2576 2.99 1106 2779 3.18 1149 2960 3.39

Bhp Brake Horsepower Input to Supply Fan Watts Input Power to Supply Fan Motor

26

Table 17 Fan Performance 50BVC,Q024

LEGEND

NOTES: 1. Units are available with the following motor and drive combina-

tions: 2, 3, and 5 hp standard drive; 2, 3 hp medium static drive. For 2, 3 hp standard drives, the drive range is 753 to 952 rpm. For medium static drives, the drive range is 872 to 1071 rpm. For 5 hp standard drives, the drive range is 967 to 1290 rpm.

2. Italics indicates field-supplied drive required. 3. Do not operate in shaded area. 4. Static pressure losses must be applied to external static pres-

sure before entering the fan performance table. 5. Interpolation is permitted: extrapolation is not. 6. Fan performance is based on filter, unit casing, and wet coil

losses. 7. Bhp values are per fan. Watts values are per motor. Unit has

2 supply fans and 2 motors.

AIRFLOW (CFM)

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 0.2 0.4 0.6 0.8 1.0

RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP 5,000 638 545 0.61 5,500 655 641 0.72 725 755 0.85 6,000 608 641 0.72 676 755 0.85 742 878 0.99 807 1001 1.13 6,500 636 755 0.85 699 878 0.99 761 1010 1.14 821 1142 1.29 7,000 604 774 0.87 666 906 1.02 726 1029 1.16 784 1170 1.32 841 1311 1.48 7,500 634 916 1.03 693 1057 1.19 750 1189 1.34 805 1330 1.50 858 1480 1.67 8,000 667 1085 1.22 723 1226 1.38 777 1377 1.55 829 1526 1.72 880 1676 1.89 8,500 700 1273 1.43 753 1423 1.60 804 1573 1.77 853 1732 1.95 902 1836 2.13 9,000 735 1480 1.67 785 1638 1.84 833 1745 2.02 881 1908 2.21 927 2071 2.40 9,500 769 1713 1.93 816 1827 2.12 863 1989 2.31 908 2152 2.50 952 2323 2.69

10,000 802 1908 2.21 848 2080 2.41 892 2251 2.61 936 2422 2.81 978 2624 3.01

AIRFLOW (CFM)

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1.2 1.4 1.6 1.8 2.0

RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP 5,000 5,500 6,000 6,500 881 1283 1.44 7,000 897 1451 1.63 951 1601 1.80 7,500 911 1629 1.83 963 1727 2.00 1014 1881 2.18 8,000 930 1781 2.07 979 1935 2.24 1028 2098 2.43 1076 2260 2.62 1124 2422 2.81 8,500 950 1989 2.31 997 2152 2.50 1043 2323 2.69 1089 2485 2.88 1134 2697 3.09 9,000 973 2233 2.59 1018 2404 2.79 1062 2576 2.99 1106 2779 3.18 1149 2960 3.39 9,500 996 2494 2.89 1039 2697 3.09 1081 2879 3.30 1123 3060 3.51 1165 3251 3.73

10,000 1020 2806 3.22 1061 2988 3.42 1102 3178 3.64 1142 3360 3.85 1182 3559 4.08

Bhp Brake Horsepower Input to Supply Fan Watts Input Power to Supply Fan Motor

27

Table 18 Fan Performance 50BVC,Q028

LEGEND

NOTES: 1. Units are available with 3 or 5 hp standard drive or 3 hp medium

static drive. For 3 hp standard drives, the drive range is 753 to 952 rpm. For medium static drives, the drive range is 872 to 1071 rpm. 5 hp standard drives have drive range of 967 to 1290 rpm.

2. Italics indicates field-supplied drive required. 3. Do not operate in shaded area. 4. Static pressure losses must be applied to external static pres-

sure before entering the fan performance table. 5. Interpolation is permitted: extrapolation is not. 6. Fan performance is based on filter, unit casing, and wet coil

losses. 7. Bhp values are per fan. Watts values are per motor. Unit has

2 supply fans and 2 motors.

AIRFLOW (CFM) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

0.2 0.4 0.6 0.8 1.0 RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP

6,250 624 678 0.79 689 797 0.92 753 917 1.06 815 1045 1.21 7,000 604 751 0.87 666 880 1.02 726 999 1.16 784 1136 1.32 841 1273 1.48 7,500 634 889 1.03 693 1027 1.19 750 1155 1.34 805 1291 1.50 858 1437 1.67 8,000 667 1054 1.22 723 1191 1.38 777 1337 1.55 829 1482 1.72 880 1627 1.89 8,500 700 1237 1.43 753 1382 1.60 804 1528 1.77 853 1682 1.95 902 1836 2.13 9,000 735 1437 1.67 785 1591 1.84 833 1745 2.02 881 1908 2.21 927 2071 2.40 9,500 769 1664 1.93 816 1827 2.12 863 1989 2.31 908 2152 2.50 952 2323 2.69

10,000 802 1908 2.21 848 2080 2.41 892 2251 2.61 936 2422 2.81 978 2624 3.01 10,500 835 2179 2.53 879 2350 2.73 921 2531 2.93 963 2742 3.14 1004 2924 3.35 11,000 870 2467 2.86 912 2688 3.08 952 2870 3.29 992 3060 3.51 1032 3251 3.73 11,500 904 2824 3.24 944 3015 3.46 983 3206 3.67 1022 3405 3.90 1060 3605 4.13 12,000 937 3169 3.63 976 3369 3.86 1014 3569 4.09 1051 3777 4.33 1088 3985 4.57 12,500 972 3550 4.07 1010 3759 4.31 1046 3967 4.55 1082 4184 4.80

AIRFLOW (CFM) AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

1.2 1.4 1.6 1.8 2.0 RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP

6,250 877 1173 1.36 7,000 897 1410 1.63 951 1555 1.80 7,500 911 1582 1.83 963 1727 2.00 1014 1881 2.18 8,000 930 1781 2.07 979 1935 2.24 1028 2098 2.43 1076 2260 2.62 1124 2422 2.81 8,500 950 1989 2.31 997 2152 2.50 1043 2323 2.69 1089 2485 2.88 1134 2697 3.09 9,000 973 2233 2.59 1018 2404 2.79 1062 2576 2.99 1106 2779 3.18 1149 2960 3.39 9,500 996 2494 2.89 1039 2697 3.09 1081 2879 3.30 1123 3060 3.51 1165 3251 3.73

10,000 1020 2806 3.22 1061 2988 3.42 1102 3178 3.64 1142 3360 3.85 1182 3559 4.08 10,500 1044 3106 3.56 1084 3296 3.78 1123 3496 4.01 1161 3686 4.23 1200 3886 4.45 11,000 1070 3451 3.95 1109 3641 4.17 1146 3840 4.40 1184 4049 4.64 1220 4248 4.87 11,500 1097 3804 4.36 1134 4012 4.60 1170 4221 4.84 1206 12,000 1124 4193 4.81 12,500

Bhp Brake Horsepower Input to Supply Fan Watts Input Power to Supply Fan Motor

28

Table 19 Fan Performance 50BVC,Q034

LEGEND

NOTES: 1. Unit is available with 5 hp standard drive only. The drive range

is 967 to 1290 rpm. 2. Italics indicates field-supplied drive required.

3. Do not operate in shaded area. 4. Static pressure losses must be applied to external static pres-

sure before entering the fan performance table. 5. Interpolation is permitted: extrapolation is not. 6. Fan performance is based on filter, unit casing, and wet coil

losses. 7. Bhp values are per fan. Watts values are per motor. Unit has

2 supply fans and 2 motors.

AIRFLOW (CFM)

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 0.2 0.4 0.6 0.8 1.0

RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP 9,000 639 1187 1.36 693 1334 1.53 745 1490 1.71 795 1646 1.89 843 1802 2.07 9,500 665 1362 1.56 717 1518 1.74 766 1674 1.92 814 1839 2.11 861 2004 2.30

10,000 693 1555 1.78 743 1720 1.97 791 1894 2.17 836 2058 2.36 881 2232 2.56 10,500 721 1775 2.03 769 1949 2.23 815 2122 2.43 859 2296 2.63 902 2478 2.84 11,000 749 2004 2.30 795 2186 2.51 840 2369 2.71 882 2551 2.92 924 2742 3.14 11,500 777 2259 2.59 822 2451 2.81 864 2642 3.03 906 2833 3.25 946 3024 3.47 12,000 805 2533 2.90 848 2733 3.13 889 2933 3.36 929 3133 3.59 968 3333 3.82 12,500 835 2842 3.26 877 3042 3.49 917 3251 3.73 955 3460 3.97 993 3668 4.20 13,000 865 3169 3.63 905 3378 3.87 944 3596 4.12 981 3813 4.37 1018 4021 4.61 13,500 894 3514 4.03 933 3741 4.29 971 3958 4.54 1007 4184 4.80 14,000 924 3895 4.46 961 4121 4.72 998 4356 4.99

AIRFLOW (CFM)

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1.2 1.4 1.6 1.8 2.0

RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP 9,000 890 1958 2.24 936 2122 2.43 982 2296 2.63 1026 2460 2.82 1071 2642 3.03 9,500 906 2168 2.48 950 2341 2.68 994 2515 2.88 1037 2688 3.08 1079 2870 3.29

10,000 925 2405 2.76 967 2578 2.96 1009 2760 3.16 1051 2942 3.37 1092 3124 3.58 10,500 944 2660 3.05 986 2842 3.26 1026 3024 3.47 1066 3215 3.68 1105 3405 3.90 11,000 965 2924 3.35 1004 3115 3.57 1043 3315 3.80 1082 3505 4.02 1120 3705 4.25 11,500 985 3224 3.69 1024 3414 3.91 1062 3614 4.14 1099 3813 4.37 1136 4021 4.61 12,000 1006 3532 4.05 1044 3732 4.28 1080 3940 4.52 1117 4148 4.75 1152 4356 4.99 12,500 1030 3877 4.44 1066 4085 4.68 1102 4302 4.93 13,000 1053 4239 4.86 13,500 14,000

Bhp Brake Horsepower Input to Supply Fan Watts Input Power to Supply Fan Motor

29

Table 20 Fan Performance 50BVT,V034

LEGEND

NOTES: 1. Unit is available with the following motor and drive combina-

tions: 7.5, 10, 15, 20 hp standard drive; 7.5, 10, 15, 20 hp medium-static drive; 7.5, 10, 15, 20 hp high-static drive. For 7.5 hp standard drives, the drive range is 780 to 960 rpm. For 10, 15, 20 hp standard and 7.5 hp medium-static drives, the drive range is 805 to 991 rpm. For 10, 15, 20 hp medium-static and 7.5 hp high-static drives the drive range is 960 to 1146 rpm. For 10, 15, 20 hp high-static drives the drive range is 1119 to 1335 rpm.

2. Italics indicates field-supplied drive required. 3. Do not operate in shaded area. 4. Static pressure losses must be applied to external static pres-

sure before entering the fan performance table. 5. Interpolation is permitted: extrapolation is not. 6. Fan performance is based on filter, unit casing, and wet coil

losses. 7. This unit has one supply fan and one fan motor.

AIRFLOW (CFM)

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 0.2 0.4 0.6 0.8 1.0

RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP 9,000 564 3,167 3.76 605 3,483 4.13 645 3,798 4.51 683 4,112 4.88 718 4,392 5.21 9,500 590 3,666 4.35 629 3,999 4.74 667 4,331 5.14 704 4,671 5.54 738 4,977 5.90

10,000 617 4,226 5.01 655 4,584 5.44 691 4,933 5.85 726 5,282 6.27 761 5,654 6.71 10,500 643 4,820 5.72 678 5,194 6.16 713 5,583 6.62 747 5,963 7.07 780 6,263 7.51 11,000 669 5,503 6.53 704 5,901 7.00 737 6,298 7.47 770 6,612 7.93 802 7,005 8.40 11,500 696 6,236 7.40 729 6,577 7.89 761 6,987 8.38 792 7,388 8.86 823 7,798 9.36 12,000 722 6,952 8.34 754 7,380 8.85 784 7,798 9.36 815 8,225 9.87 845 8,510 10.38 12,500 750 7,816 9.38 780 8,260 9.91 810 8,561 10.44 839 8,990 10.97 868 9,427 11.50 13,000 777 8,595 10.49 806 9,050 11.04 835 9,504 11.59 863 9,949 12.14 891 10,403 12.69 13,500 804 9,572 11.68 832 10,043 12.25 860 10,514 12.83 887 10,985 13.40 914 11,447 13.96 14,000 832 10,634 12.97 859 11,122 13.57 886 11,610 14.16 912 12,097 14.76 938 12,585 15.35 14,500 859 11,747 14.33 885 12,217 14.90 911 12,756 15.56 936 13,260 16.18 962 13,765 16.79 15,000 886 12,953 15.80 911 13,474 16.44 936 13,996 17.07 961 14,517 17.71 986 15,038 18.34

AIRFLOW (CFM)

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1.2 1.4 1.6 1.8 2.0

RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP 9,000 751 4,663 5.53 785 4,933 5.85 817 5,212 6.18 849 5,512 6.54 881 5,804 6.89 9,500 771 5,264 6.25 802 5,574 6.61 834 5,866 6.96 864 6,166 7.31 895 6,394 7.67

10,000 792 5,963 7.07 822 6,272 7.44 852 6,498 7.80 882 6,804 8.16 911 7,118 8.54 10,500 812 6,603 7.92 841 6,926 8.31 870 7,240 8.69 899 7,563 9.07 927 7,885 9.46 11,000 833 7,388 8.86 861 7,720 9.26 889 8,051 9.66 917 8,253 10.07 944 8,578 10.46 11,500 854 8,199 9.84 882 8,441 10.30 909 8,784 10.72 936 9,127 11.13 962 9,469 11.55 12,000 874 8,921 10.88 903 9,332 11.38 930 9,701 11.83 955 10,060 12.27 981 10,420 12.71 12,500 896 9,855 12.02 924 10,283 12.54 951 10,702 13.06 976 11,079 13.51 1001 11,456 13.97 13,000 919 10,857 13.24 945 11,302 13.79 972 11,747 14.33 997 12,166 14.84 1022 12,551 15.31 13,500 941 11,918 14.54 967 12,380 15.10 993 12,850 15.67 1018 13,303 16.23 1042 13,722 16.74 14,000 964 13,064 15.94 990 13,551 16.53 1015 14,030 17.11 1040 14,517 17.71 1064 14,979 18.27 14,500 987 14,269 17.41 1011 14,765 18.01 1036 15,261 18.62 1060 15,765 19.23 1084 16,260 19.83 15,000 1010 15,560 18.98 1034 16,081 19.62

Bhp Brake Horsepower Input to Supply Fan Watts Input Power to Supply Fan Motor

30

Table 20 Fan Performance 50BVT,V034 (cont)

LEGEND

NOTES: 1. Unit is available with the following motor and drive combina-

tions: 7.5, 10, 15, 20 hp standard drive; 7.5, 10, 15, 20 hp medium-static drive; 7.5, 10, 15, 20 hp high-static drive. For 7.5 hp standard drives, the drive range is 780 to 960 rpm. For 10, 15, 20 hp standard and 7.5 hp medium-static drives, the drive range is 805 to 991 rpm. For 10, 15, 20 hp medium-static and 7.5 hp high-static drives the drive range is 960 to 1146 rpm. For 10, 15, 20 hp high-static drives the drive range is 1119 to 1335 rpm.

2. Italics indicates field-supplied drive required. 3. Do not operate in shaded area. 4. Static pressure losses must be applied to external static pres-

sure before entering the fan performance table. 5. Interpolation is permitted: extrapolation is not. 6. Fan performance is based on filter, unit casing, and wet coil

losses. 7. This unit has one supply fan and one fan motor.

AIRFLOW (CFM)

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 2.2 2.4 2.6 2.8 3.0

RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP 9,000 912 6,095 7.23 943 6,324 7.59 974 6,629 7.95 1005 6,943 8.33 1035 7,266 8.72 9,500 925 6,690 8.03 955 6,996 8.39 984 7,310 8.77 1013 7,624 9.15 1042 7,955 9.54

10,000 940 7,423 8.91 969 7,746 9.29 997 8,060 9.67 1025 8,253 10.07 1053 8,578 10.46 10,500 955 8,199 9.84 982 8,390 10.23 1010 8,715 10.63 1037 9,041 11.03 1063 9,375 11.44 11,000 971 8,913 10.87 998 9,238 11.27 1024 9,572 11.68 1050 9,915 12.09 1076 10,257 12.51 11,500 988 9,812 11.97 1014 10,155 12.39 1040 10,506 12.82 1065 10,848 13.23 1090 11,207 13.67 12,000 1006 10,771 13.14 1031 11,130 13.58 1056 11,490 14.02 1080 11,849 14.45 1104 12,217 14.90 12,500 1025 11,824 14.42 1050 12,191 14.87 1074 12,568 15.33 1097 12,944 15.79 1121 13,320 16.25 13,000 1045 12,936 15.78 1069 13,320 16.25 1092 13,714 16.73 1115 14,098 17.20 1138 14,492 17.68 13,500 1065 14,124 17.23 1088 14,526 17.72 1110 14,927 18.21 1133 15,329 18.70 1155 15,731 19.19 14,000 1086 15,397 18.78 1108 15,816 19.29 1131 16,235 19.80 14,500 15,000

AIRFLOW (CFM)

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 3.2 3.4 3.6 3.8 4.0

RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP 9,000 1065 7,606 9.13 1095 7,946 9.53 9,500 1071 8,286 9.94 1100 8,493 10.36 1128 8,835 10.78 1157 9,195 11.22 1185 9,564 11.67

10,000 1081 8,904 10.86 1108 9,247 11.28 1136 9,598 11.71 1163 9,958 12.15 1190 10,326 12.60 10,500 1090 9,718 11.85 1116 10,060 12.27 1143 10,411 12.70 1169 10,771 13.14 1195 11,139 13.59 11,000 1102 10,608 12.94 1127 10,959 13.37 1153 11,319 13.81 1178 11,678 14.25 1203 12,046 14.69 11,500 1115 11,558 14.10 1139 11,918 14.54 1164 12,286 14.99 1188 12,653 15.43 1212 13,038 15.90 12,000 1128 12,585 15.35 1152 12,953 15.80 1176 13,329 16.26 1200 13,705 16.72 1223 14,090 17.19 12,500 1144 13,697 16.71 1167 14,073 17.17 1190 14,457 17.64 1213 14,850 18.12 1236 15,235 18.58 13,000 1160 14,876 18.15 1183 15,269 18.63 1205 15,662 19.11 1227 16,064 19.60 13,500 1177 16,132 19.68 14,000 14,500 15,000

Bhp Brake Horsepower Input to Supply Fan Watts Input Power to Supply Fan Motor

31

Table 21 Fan Performance 50BVT,V044

LEGEND

NOTES: 1. Unit is available with the following motor and drive com-

binations: 7.5, 10, 15 hp standard drive; 7.5, 10, 15 hp medium- static drive; 7.5, 10, 15 hp high-static drive. For 7.5 hp standard drives, the drive range is 780 to 960 rpm. For 10, 15 hp standard and 7.5 hp medium-static drives, the drive range is 805 to 991 rpm. For 10, 15 hp medium-static and 7.5 hp high-static drives the drive range is 960 to 1146 rpm. For 10, 15 hp high-static drives the drive range is 1119 to 1335 rpm.

2. Italics indicates field-supplied drive required. 3. Do not operate in shaded area. 4. Static pressure losses must be applied to external static pres-

sure before entering the fan performance table. 5. Interpolation is permitted: extrapolation is not. 6. Fan performance is based on filter, unit casing, and wet coil

losses. 7. Bhp values are per fan. Watts values are per motor. Unit has

2 supply fans and 2 motors.

AIRFLOW (CFM)

AVAILABLE EXTERNAL STATIC PRESSURE (Iin. wg) 0.2 0.4 0.6 0.8 1.0

RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP 12,000 403 1057 1.25 461 1271 1.51 512 1458 1.73 561 1644 1.95 608 1838 2.18 12,500 413 1173 1.39 470 1395 1.66 519 1591 1.89 567 1785 2.12 613 1980 2.35 13,000 423 1280 1.52 478 1520 1.80 527 1723 2.04 573 1927 2.29 618 2130 2.53 13,500 436 1422 1.69 489 1661 1.97 537 1883 2.23 582 2086 2.47 626 2297 2.73 14,000 446 1546 1.83 498 1803 2.14 546 2033 2.41 589 2253 2.67 632 2465 2.92 14,500 459 1706 2.02 509 1962 2.33 557 2209 2.62 599 2438 2.89 640 2658 3.15 15,000 469 1847 2.19 518 2121 2.52 565 2385 2.83 607 2614 3.10 647 2843 3.37 16,000 495 2200 2.61 541 2482 2.94 585 2772 3.29 627 3036 3.60 665 3272 3.88 17,000 518 2570 3.05 562 2878 3.41 604 3176 3.77 645 3474 4.12 681 3736 4.43 17,500 531 2781 3.30 573 3097 3.67 614 3404 4.04 654 3710 4.40 691 3990 4.73 18,000 543 3001 3.56 584 3325 3.94 625 3640 4.32 664 3955 4.69 700 4252 5.04 19,000 568 3474 4.12 607 3815 4.53 646 4147 4.92 684 4488 5.32 720 4820 5.72 19,500 580 3728 4.42 619 4077 4.84 657 4418 5.24 693 4767 5.66 729 5107 6.06

AIRFLOW (CFM)

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1.2 1.4 1.6 1.8 2.0

RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP 12,000 654 2042 2.42 700 2262 2.68 12,500 657 2183 2.59 702 2403 2.85 745 2640 3.13 13,000 661 2341 2.78 704 2561 3.04 746 2790 3.31 13,500 668 2517 2.99 709 2737 3.25 750 2974 3.53 791 3220 3.82 14,000 673 2693 3.19 713 2913 3.46 753 3150 3.74 792 3395 4.03 14,500 680 2886 3.42 719 3115 3.69 758 3351 3.98 796 3605 4.28 834 3859 4.33 15,000 686 3079 3.65 724 3316 3.93 762 3553 4.21 799 3806 4.52 836 4069 4.57 16,000 702 3518 4.17 739 3771 4.47 774 4016 4.76 810 4278 5.08 844 4540 5.11 17,000 717 3990 4.73 752 4252 5.04 786 4514 5.36 820 4785 5.68 853 5055 5.70 17,500 726 4252 5.04 760 4523 5.37 794 4793 5.69 827 5064 6.01 859 5353 6.02 18,000 735 4523 5.37 768 4802 5.70 801 5072 6.02 833 5371 6.37 865 5662 6.37 19,000 753 5107 6.06 785 5415 6.42 816 5707 6.77 848 5998 7.12 878 6298 7.09 19,500 762 5433 6.45 794 5733 6.80 825 6033 7.16 855 6263 7.51 885 6568 7.48

AIRFLOW (CFM)

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 2.2 2.4 2.6 2.8 3.0

RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP 12,000 12,500 13,000 13,500 14,000 14,500 871 4130 4.90 15,000 872 4340 5.15 16,000 879 4811 5.71 913 5099 6.05 947 5415 6.42 980 5724 6.79 17,000 886 5353 6.35 919 5645 6.70 951 5945 7.05 983 6254 7.42 1015 6507 7.81 17,500 891 5645 6.70 923 5936 7.04 955 6245 7.41 986 6481 7.78 1017 6795 8.15 18,000 897 5945 7.05 928 6245 7.41 959 6481 7.78 989 6786 8.14 1020 7109 8.53 19,000 908 6525 7.83 938 6830 8.19 968 7135 8.56 997 7449 8.94 1027 7772 9.32 19,500 915 6865 8.24 944 7170 8.60 973 7484 8.98 1002 7807 9.37 1031 8129 9.75

Bhp Brake Horsepower Input to Supply Fan Watts Input Power to Supply Fan Motor

32

Table 22 Fan Performance 50BVT,V054

LEGEND

NOTES: 1. Unit is available with the following motor and drive com-

binations: 7.5, 10, 15, 20 hp standard drive; 7.5, 10, 15, 20 hp medium-static drive; 7.5, 10, 15, 20 hp high-static drive. For 7.5 hp standard drives, the drive range is 780 to 960 rpm. For 10, 15, 20 hp standard and 7.5 hp medium-static drives, the drive range is 805 to 991 rpm. For 10, 15, 20 hp medium-static and 7.5 hp high-static drives the drive range is 960 to 1146 rpm. For 10, 15, 20 hp high-static drives the drive range is 1119 to 1335 rpm.

2. Italics indicates field-supplied drive required. 3. Do not operate in shaded area. 4. Static pressure losses must be applied to external static pres-

sure before entering the fan performance table. 5. Interpolation is permitted: extrapolation is not. 6. Fan performance is based on filter, unit casing, and wet coil

losses. 7. Bhp values are per fan. Watts values are per motor. Unit has

2 supply fans and 2 motors.

AIRFLOW (CFM)

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 0.2 0.4 0.6 0.8 1.0

RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP 15,000 489 1953 2.32 537 2227 2.64 582 2473 2.93 623 2711 3.22 663 2939 3.49 16,000 513 2315 2.75 559 2596 3.08 603 2878 3.41 642 3132 3.72 680 3369 4.00 17,000 540 2728 3.24 583 3027 3.59 624 3325 3.94 663 3605 4.28 699 3868 4.59 18,000 564 3167 3.76 605 3483 4.13 645 3798 4.51 683 4112 4.88 718 4392 5.21 18,500 578 3413 4.05 618 3745 4.44 657 4069 4.83 694 4392 5.21 729 4680 5.55 19,000 590 3666 4.35 629 3999 4.74 667 4331 5.14 704 4671 5.54 738 4977 5.90 19,500 604 3938 4.67 642 4278 5.08 679 4628 5.49 715 4968 5.89 749 5299 6.29 20,000 617 4226 5.01 655 4584 5.44 691 4933 5.85 726 5282 6.27 761 5654 6.71 20,500 629 4505 5.34 665 4872 5.78 701 5238 6.21 736 5618 6.67 770 5980 7.09 21,000 643 4820 5.72 678 5194 6.16 713 5583 6.62 747 5963 7.07 780 6263 7.51 22,000 669 5503 6.53 704 5901 7.00 737 6298 7.47 770 6612 7.93 802 7005 8.40 23,000 696 6236 7.40 729 6577 7.89 761 6987 8.38 792 7388 8.86 823 7798 9.36 24,000 722 6952 8.34 754 7380 8.85 784 7798 9.36 815 8225 9.87 845 8510 10.38

AIRFLOW (CFM)

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1.2 1.4 1.6 1.8 2.0

RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP 15,000 701 3167 3.76 739 3413 4.05 777 3658 4.34 814 3,911 4.64 850 4,174 4.95 16,000 717 3623 4.30 753 3868 4.59 789 4121 4.89 824 4,383 5.20 858 4,654 5.52 17,000 734 4121 4.89 769 4383 5.20 803 4645 5.51 837 4,915 5.83 870 5,194 6.16 18,000 751 4663 5.53 785 4933 5.85 817 5212 6.18 849 5,512 6.54 881 5,804 6.89 18,500 762 4968 5.89 794 5247 6.22 826 5548 6.58 857 5,839 6.93 889 6,130 7.27 19,000 771 5264 6.25 802 5574 6.61 834 5866 6.96 864 6,166 7.31 895 6,394 7.67 19,500 781 5618 6.67 812 5919 7.02 843 6219 7.38 873 6,446 7.73 903 6,743 8.09 20,000 792 5963 7.07 822 6272 7.44 852 6498 7.80 882 6,804 8.16 911 7,118 8.54 20,500 801 6307 7.48 831 6542 7.85 860 6856 8.23 890 7,170 8.60 918 7,484 8.98 21,000 812 6603 7.92 841 6926 8.31 870 7240 8.69 899 7,563 9.07 927 7,885 9.46 22,000 833 7388 8.86 861 7720 9.26 889 8051 9.66 917 8,253 10.07 944 8,578 10.46 23,000 854 8199 9.84 882 8441 10.30 909 8784 10.72 936 9,127 11.13 962 9,469 11.55 24,000 874 8921 10.88 903 9332 11.38 930 9701 11.83 955 10,060 12.27 981 10,420 12.71

Bhp Brake Horsepower Input to Supply Fan Watts Input Power to Supply Fan Motor

33

Table 22 Fan Performance 50BVT,V054 (cont)

LEGEND

NOTES: 1. Unit is available with the following motor and drive combina-

tions: 7.5, 10, 15, 20 hp standard drive; 7.5, 10, 15, 20 hp medium-static drive; 7.5, 10, 15, 20 hp high-static drive. For 7.5 hp standard drives, the drive range is 780 to 960 rpm. For 10, 15, 20 hp standard and 7.5 hp medium-static drives, the drive range is 805 to 991 rpm. For 10, 15, 20 hp medium-static and 7.5 hp high-static drives the drive range is 960 to 1146 rpm. For 10, 15, 20 hp high-static drives the drive range is 1119 to 1335 rpm.

2. Italics indicates field-supplied drive required. 3. Do not operate in shaded area. 4. Static pressure losses must be applied to external static pres-

sure before entering the fan performance table. 5. Interpolation is permitted: extrapolation is not. 6. Fan performance is based on filter, unit casing, and wet coil

losses. 7. Bhp values are per fan. Watts values are per motor. Unit has

2 supply fans and 2 motors.

AIRFLOW (CFM)

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 2.2 2.4 2.6 2.8 3.0

RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP 15,000 886 4,444 5.27 922 4,741 5.62 958 5,046 5.99 993 5,380 6.38 16,000 893 4,924 5.84 927 5,212 6.18 961 5,539 6.57 994 5,857 6.95 17,000 903 5,495 6.52 935 5,795 6.87 967 6,095 7.23 999 6,341 7.61 1031 6,664 8.00 18,000 912 6,095 7.23 943 6,324 7.59 974 6,629 7.95 1005 6,943 8.33 1035 7,266 8.72 18,500 919 6,359 7.63 950 6,664 8.00 980 6,970 8.36 1010 7,284 8.74 1039 7,606 9.13 19,000 925 6,690 8.03 955 6,996 8.39 984 7,310 8.77 1013 7,624 9.15 1042 7,955 9.54 19,500 932 7,048 8.46 962 7,362 8.83 991 7,676 9.21 1019 7,999 9.60 1047 8,330 9.99 20,000 940 7,423 8.91 969 7,746 9.29 997 8,060 9.67 1025 8,253 10.07 1053 8,578 10.46 20,500 946 7,798 9.36 975 8,121 9.74 1003 8,304 10.13 1030 8,630 10.53 1057 8,955 10.92 21,000 955 8,199 9.84 982 8,390 10.23 1010 8,715 10.63 1037 9,041 11.03 1063 9,375 11.44 22,000 971 8,913 10.87 998 9,238 11.27 1024 9,572 11.68 1050 9,915 12.09 1076 10,257 12.51 23,000 988 9,812 11.97 1014 10,155 12.39 1040 10,506 12.82 1065 10,848 13.23 1090 11,207 13.67 24,000 1006 10,771 13.14 1031 11,130 13.58 1056 11,490 14.02 1080 11,849 14.45 1104 12,217 14.90

AIRFLOW (CFM)

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 3.2 3.4 3.6 3.8 4.0

RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP 15,000 16,000 17,000 1062 7,005 8.40 1093 7,353 8.82 18,000 1065 7,606 9.13 1095 7,946 9.53 18,500 1069 7,946 9.53 1098 8,286 9.94 1127 8,501 10.37 1156 8,861 10.81 19,000 1071 8,286 9.94 1100 8,493 10.36 1128 8,835 10.78 1157 9,195 11.22 1185 9,564 11.67 19,500 1076 8,518 10.39 1104 8,861 10.81 1132 9,212 11.24 1159 9,572 11.68 1187 9,932 12.12 20,000 1081 8,904 10.86 1108 9,247 11.28 1136 9,598 11.71 1163 9,958 12.15 1190 10,326 12.60 20,500 1084 9,298 11.34 1112 9,641 11.76 1138 9,992 12.19 1165 10,343 12.62 1191 10,711 13.07 21,000 1090 9,718 11.85 1116 10,060 12.27 1143 10,411 12.70 1169 10,771 13.14 1195 11,139 13.59 22,000 1102 10,608 12.94 1127 10,959 13.37 1153 11,319 13.81 1178 11,678 14.25 1203 12,046 14.69 23,000 1115 11,558 14.10 1139 11,918 14.54 1164 12,286 14.99 1188 12,653 15.43 1212 13,038 15.90 24,000 1128 12,585 15.35 1152 12,953 15.80 1176 13,329 16.26 1200 13,705 16.72 1223 14,090 17.19

Bhp Brake Horsepower Input to Supply Fan Watts Input Power to Supply Fan Motor

34

Table 23 Fan Performance 50BVT,V064

LEGEND

NOTES: 1. Unit is available with the following motor and drive combina-

tions: 7.5, 10, 15, 20 hp standard drive; 7.5, 10, 15, 20 hp medium-static drive; 7.5, 10, 15, 20 hp high-static drive. For 7.5 hp standard drives, the drive range is 780 to 960 rpm. For 10, 15, 20 hp standard and 7.5 hp medium-static drives, the drive range is 805 to 991 rpm. For 10, 15, 20 hp medium-static and 7.5 hp high-static drives the drive range is 960 to 1146 rpm. For 10, 15, 20 hp high-static drives the drive range is 1119 to 1335 rpm.

2. Italics indicates field-supplied drive required. 3. Do not operate in shaded area. 4. Static pressure losses must be applied to external static pres-

sure before entering the fan performance table. 5. Interpolation is permitted: extrapolation is not. 6. Fan performance is based on filter, unit casing, and wet coil

losses. 7. Bhp values are per fan. Watts values are per motor. Unit has

2 supply fans and 2 motors.

AIRFLOW (CFM)

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 0.2 0.4 0.6 0.8 1.0

RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP 18,000 564 3,167 3.76 605 3,483 4.13 645 3,798 4.51 683 4,112 4.88 718 4,392 5.21 19,000 590 3,666 4.35 629 3,999 4.74 667 4,331 5.14 704 4,671 5.54 738 4,977 5.90 20,000 617 4,226 5.01 655 4,584 5.44 691 4,933 5.85 726 5,282 6.27 761 5,654 6.71 21,000 643 4,820 5.72 678 5,194 6.16 713 5,583 6.62 747 5,963 7.07 780 6,263 7.51 22,000 669 5,503 6.53 704 5,901 7.00 737 6,298 7.47 770 6,612 7.93 802 7,005 8.40 23,000 696 6,236 7.40 729 6,577 7.89 761 6,987 8.38 792 7,388 8.86 823 7,798 9.36 24,000 722 6,952 8.34 754 7,380 8.85 784 7,798 9.36 815 8,225 9.87 845 8,510 10.38 25,000 750 7,816 9.38 780 8,260 9.91 810 8,561 10.44 839 8,990 10.97 868 9,427 11.50 26,000 777 8,595 10.49 806 9,050 11.04 835 9,504 11.59 863 9,949 12.14 891 10,403 12.69 27,000 804 9,572 11.68 832 10,043 12.25 860 10,514 12.83 887 10,985 13.40 914 11,447 13.96 28,000 832 10,634 12.97 859 11,122 13.57 886 11,610 14.16 912 12,097 14.76 938 12,585 15.35 29,000 859 11,747 14.33 885 12,251 14.94 911 12,756 15.56 936 13,260 16.18 962 13,765 16.79

AIRFLOW (CFM)

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1.2 1.4 1.6 1.8 2.0

RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP 18,000 751 4,663 5.53 785 4,933 5.85 817 5,212 6.18 849 5,512 6.54 881 5,804 6.89 19,000 771 5,264 6.25 802 5,574 6.61 834 5,866 6.96 864 6,166 7.31 895 6,394 7.67 20,000 792 5,963 7.07 822 6,272 7.44 852 6,498 7.80 882 6,804 8.16 911 7,118 8.54 21,000 812 6,603 7.92 841 6,926 8.31 870 7,240 8.69 899 7,563 9.07 927 7,885 9.46 22,000 833 7,388 8.86 861 7,720 9.26 889 8,051 9.66 917 8,253 10.07 944 8,578 10.46 23,000 854 8,199 9.84 882 8,441 10.30 909 8,784 10.72 936 9,127 11.13 962 9,469 11.55 24,000 874 8,921 10.88 903 9,332 11.38 930 9,701 11.83 955 10,060 12.27 981 10,420 12.71 25,000 896 9,855 12.02 924 10,283 12.54 951 10,702 13.06 976 11,079 13.51 1001 11,456 13.97 26,000 919 10,857 13.24 945 11,302 13.79 972 11,747 14.33 997 12,166 14.84 1022 12,551 15.31 27,000 941 11,918 14.54 967 12,380 15.10 993 12,850 15.67 1018 13,303 16.23 1042 13,722 16.74 28,000 964 13,064 15.94 990 13,551 16.53 1015 14,030 17.11 1040 14,517 17.71 1064 14,979 18.27 29,000 987 14,269 17.41 1011 14,765 18.01 1036 15,261 18.62 1060 15,765 19.23 1084 16,260 19.83

Bhp Brake Horsepower Input to Supply Fan Watts Input Power to Supply Fan Motor

35

Table 23 Fan Performance 50BVT,V064 (cont)

LEGEND

NOTES: 1. Unit is available with the following motor and drive combina-

tions: 7.5, 10, 15, 20 hp standard drive; 7.5, 10, 15, 20 hp medium-static drive; 7.5, 10, 15, 20 hp high-static drive. For 7.5 hp standard drives, the drive range is 780 to 960 rpm. For 10, 15, 20 hp standard and 7.5 hp medium-static drives, the drive range is 805 to 991 rpm. For 10, 15, 20 hp medium-static and 7.5 hp high-static drives the drive range is 960 to

1146 rpm. For 10, 15, 20 hp high-static drives the drive range is 1119 to 1335 rpm.

2. Italics indicates field-supplied drive required. 3. Do not operate in shaded area. 4. Static pressure losses must be applied to external static pres-

sure before entering the fan performance table. 5. Interpolation is permitted: extrapolation is not. 6. Fan performance is based on filter, unit casing, and wet coil

losses. 7. Bhp values are per fan. Watts values are per motor. Unit has

2 supply fans and 2 motors.

AIRFLOW (CFM)

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 2.2 2.4 2.6 2.8 3.0

RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP 18,000 912 6,095 7.23 943 6,324 7.59 974 6,629 7.95 1005 6,943 8.33 1035 7,266 8.72 19,000 925 6,690 8.03 955 6,996 8.39 984 7,310 8.77 1013 7,624 9.15 1042 7,955 9.54 20,000 940 7,423 8.91 969 7,746 9.29 997 8,060 9.67 1025 8,253 10.07 1053 8,578 10.46 21,000 955 8,199 9.84 982 8,390 10.23 1010 8,715 10.63 1037 9,041 11.03 1063 9,375 11.44 22,000 971 8,913 10.87 998 9,238 11.27 1024 9,572 11.68 1050 9,915 12.09 1076 10,257 12.51 23,000 988 9,812 11.97 1014 10,155 12.39 1040 10,506 12.82 1065 10,848 13.23 1090 11,207 13.67 24,000 1006 10,771 13.14 1031 11,130 13.58 1056 11,490 14.02 1080 11,849 14.45 1104 12,217 14.90 25,000 1025 11,824 14.42 1050 12,191 14.87 1074 12,568 15.33 1097 12,944 15.79 1121 13,320 16.25 26,000 1045 12,936 15.78 1069 13,320 16.25 1092 13,714 16.73 1115 14,098 17.20 1138 14,492 17.68 27,000 1065 14,124 17.23 1088 14,526 17.72 1110 14,927 18.21 1133 15,329 18.70 1155 15,731 19.19 28,000 1086 15,397 18.78 1108 15,816 19.29 1131 16,235 19.80 29,000

AIRFLOW (CFM)

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 3.2 3.4 3.6 3.8 4.0

RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP RPM WATTS BHP 18,000 1065 7,606 9.13 1095 7,946 9.53 19,000 1071 8,286 9.94 1100 8,493 10.36 1128 8,835 10.78 1157 9,195 11.22 1185 9,564 11.67 20,000 1081 8,904 10.86 1108 9,247 11.28 1136 9,598 11.71 1163 9,958 12.15 1190 10,326 12.60 21,000 1090 9,718 11.85 1116 10,060 12.27 1143 10,411 12.70 1169 10,771 13.14 1195 11,139 13.59 22,000 1102 10,608 12.94 1127 10,959 13.37 1153 11,319 13.81 1178 11,678 14.25 1203 12,046 14.69 23,000 1115 11,558 14.10 1139 11,918 14.54 1164 12,286 14.99 1188 12,653 15.43 1212 13,038 15.90 24,000 1128 12,585 15.35 1152 12,953 15.80 1176 13,329 16.26 1200 13,705 16.72 1223 14,090 17.19 25,000 1144 13,697 16.71 1167 14,073 17.17 1190 14,457 17.64 1213 14,850 18.12 1236 15,235 18.58 26,000 1160 14,876 18.15 1183 15,269 18.63 1205 15,662 19.11 1227 16,064 19.60 27,000 1177 16,132 19.68 28,000 29,000

Bhp Brake Horsepower Input to Supply Fan Watts Input Power to Supply Fan Motor

36

CONTROLS

Unit Protection Module (UPM) GENERAL DESCRIPTION The Unit Protection Module (UPM) as shown in Fig. 17 is a printed circuit board (PCB) that interfaces with the thermostat for constant volume units or the digital direct controller.

The main purpose of this device is to protect the com- pressors by monitoring the different states of switches and sensors of each refrigerant circuit. This device provides time delays and protects the unit against freezing of the wa- ter and refrigerant heat exchangers as well as condensate overflow when the appropriate sensors are installed. FEATURES AND SAFETIES Alarm output is Normal- ly Open (NO) dry contact. If 24 vac output is needed, R must be wired to the ALR-COM terminal; 24 vac will be available on the ALR-OUT terminal when the unit is in alarm condition. If pulse is selected, the alarm output will be pulsed.

Power Random Start-Up This feature prevents multiple units sharing same electrical circuit or network from starting at the same time. It assures that units sharing the same electri- cal circuit do not demand high inrush currents simultaneously when starting back up after a power failure.

If the controller has been completely powered down for more than 28 milliseconds, a random delay is initiated. If the controller is set to normal operation (test switch set to NO), then typically the unit will start within the time range of 270 to 300 seconds.

In order for the random sequence to initiate the unit pow- er must be removed completely.

Anti-Short Cycle Delay This feature protects the com- pressor short cycling if the Y call is set and removed. The anti-short cycle delay is 300 seconds on break during normal operation. NOTE: If the board is set to test mode through the TEST DIP switch, the delay will be 5 seconds.

High and Low Pressure Protection The UPM monitors the state of the high and low pressure switch inputs of each refrigerant circuit, HP1, LP1, HP2, and LP2. These switches must be closed for the controller to energize the compressor output (CC1 and CC2). The CC output will only be energized when the switches are closed and the anti-short cycle (and/or random start-up when applicable) has expired.

High Pressure Protection If the HP1 or HP2 switches are open upon a Y1 or Y2 call, the UPM will not energize the re- spective CC1 or CC2 outputs; the corresponding compressor will remain off, the fault LED will flash 1 time for the HP1 and 3 times for HP2, and the alarm contact will remain off.

If a compressor is running in normal mode on a Y call (Y1 or Y2 or both) and the high pressure switch opens, the UPM will shut down the compressor output and will keep it off un- til the switch closes and the anti-short cycle has expired. The

IMPORTANT: If the board is set to TEST mode through the TEST DIP switch, SW1 delay will be 10 seconds.

Fig. 17 Two-Stage Unit Protection Module

Dimensions are in inches.

37

controller will keep track of the number of times the switch opens; if, within a 1-hour period, the switch opens the num- ber of times set via the DIP switch, the controller will shut down the compressor and perform a hard lockout condition. Under this condition the alarm contact will be energized.

The UPM allows the user to configure the counts that the HP will be allowed to open within 1 hour before the UPM per- forms a hard lockout on the compressor. The user can select ei- ther two or four times by changing switch 4 on the DIP switch SW1 on the UPM board.

Low Pressure Protection If the LP1 or LP2 switches are open upon a Y1 or Y2 call (Y1 or Y2 or both) the UPM will not energize the CC1 or CC2 outputs; the corresponding compressor will remain off, the fault LED will flash two times for the LP1 and 4 times for the LP2, and the alarm con- tact will remain off.

If the compressor is running in normal mode on a Y call (Y1 or Y2 or both) and the low pressure switch opens, the UPM will keep the compressor running for 2 minutes. If the condition remains after this period of time, the compressor will shut down and the UPM will start a soft lockout. The UPM will flash 2 times for the LP1 and 4 times for the LP2 and the alarm contact will remain off.

If the switches close, the UPM will start the compressor af- ter the anti-short cycle has expired and UPM will energize the compressor output.

Ground The UPM controller takes its ground reference from the unit chassis which is connected to the controller via the C-GND spade terminal.

DIP Switch Settings The DIP switch is used to configure most of the available features of the UPM as follows: Alarm mode, Constant or Pulse Reset mode, Y signal or R signal Lockout mode, 2 or 4 strikes Test mode, Normal or Test operation

The settings shown in Fig. 18 are factory default. The unit wiring diagram is the ultimate guide for factory DIP switch de- fault settings.

The following table is available on the UPM board as well and it depicts the switch position and its associated functionality (Table 24).

Table 24 UPM Dip Switch Configuration

Selectable Alarm Mode The UPM controller can be con- figured to have either a constant signal or a pulse.

If constant (CONT) is selected the UPM will provide a closed contact until the alarm is cleared.

If pulsed (PULSE) is selected the UPM will sequence the alarm contact with the fault LED flashes.

Freeze Protection The default setting for the freeze limit trip is 30 F; this can be changed to 15 F by cutting the R17 for Compressor 1 and R77 for Compressor 2 resistor located on top of the DIP switch SW1. The UPM controller will con- stantly monitor the refrigerant temperature with the sensor mounted close to the condensing water coil between the ther- mal expansion valve and water coil as shown in Fig. 19.

If temperature drops below or remains at the freeze limit trip for 30 seconds, the controller will shut the compressor down and enter into a soft lockout condition. Both the status LED and the Alarm contact will be active. The LED will flash 5 times the code associated with this alarm condition.

Brownout Protection The UPM controller will constantly monitor the power supply. If the nominal voltage drops below 25% of its value (18 VAC approximately), the unit will enter brownout protection mode. The compressor CC outputs will be de-energized and the unit will enter the soft lockout mode. The controller will not monitor the power supply during the first 500 milliseconds of compressor start-up to avoid noise and false alarms. Once the UPM detects a brownout condi- tion, its fault LED will flash 7 times as error code indication.

Condensation Overflow The UPM controller continuous- ly monitors the drain pan for high condensate water level. To do so it utilizes a sensor which, when condensate sensor op- tion is present, identifies an alarm condition when the sen- sors impedance drops below 230,000 15%. Once the UPM senses this resistance value, it enters into a hard lockout and reports the corresponding code via its status LED (6 flashes). To exit the hard lockout, water has to return to its normal lev- el and UPM has to be reset by removing the power from the Y terminal (R if set on the DIP switch). The compressors will be turned on after anti-short cycle expires.

IMPORTANT: To exit the hard lockout the controller must be reset from the Y or R terminal by removing the power from the selected terminal. The user can choose which will be the reset point via the DIP switch SW1.

Fig. 18 Dip Switch Settings

O N 1

2 3

4 LOCKOUT

RESET

ALARM

TEST

4 LOCKOUT 4 2 3 RESET R Y 2 ALARM CONT PULSE 1 TEST YES NO

Fig. 19 Freeze Sensor Location

FREEZE SENSOR

38

Sequence of Operation, CV Units 50BVC,Q,T,V The following sequence of operation ap- plies to constant volume units.

Cooling is initiated when the set point in the remote thermo- stat is not met (space temperature is higher than set point). The unit sequence of operation is as follows:

Contact closure at the G terminal will provide power to the supply fan contactor energizing the supply fan. The supply fan will be off during unoccupied schedule, depending upon the features of the thermostat used.

The O terminal energizes the reversing valve (heat pump units only). Typically Y1 will also be energized at this time for cooling operation. The second stage of cooling Y2 will be initialized after a minimum run time and there is a differential from set point plus a deadband or a proportional plus integral calculation based upon demand and length of time space tem- perature is greater than set point.

Additional assurance is provided by a delay on make timer in the second-stage compressor contactor circuit to avoid dual compressor in-rush starting current.

Heating mode (heat pump models only) follows the same sequence as above except that the reversing valve is not energized.

The UPM sequence of operation illustrated in Fig. 20 ap- plies for both refrigerant circuits. The second compressor is en- ergized 10 seconds after the first if both Y1 and Y2 signals are applied simultaneously. WATER ECONOMIZER COOLING The unit diverts condenser inlet waterflow through an optional economizer coil to pre-cool evaporator entering airflow. If the entering water temperature is colder than the setting on the aquastat and the re- turn-air temperature is warmer than the setting on the return air thermostat, the two-position diverting valve will direct water to the economizer coil.

Economizer water flow is in series with the condensers allowing compressor operation while the economizer is operating. Y CALL (COOLING OR HEATING) The UPM will en- ergize the compressors output (CC) in an event of a Y Call from a thermostat or controller (after the random start-up and/ or the anti-short cycle delays have elapsed). The Y input termi- nal must be energized with a 24 VAC signal.

Fig. 20 UPM Sequence of Operation (SOO) Flow Chart

39

I/O Flex 6126 Controller Specifications, VAV Units Only 50BVJ,W POWER 24 vac 10%, 50 to 60 Hz, 20 va power con- sumption (26 va with BACview tool attached):

26 Vdc (25 V min, 30 V max) Single Class II 100 va or less

PHYSICAL Rugged aluminum housing, removable screw terminals with custom silk-screening available. ENVIRONMENTAL OPERATING RANGE -20 to 140 F (-29 to 60 C), 10 to 95% relative humidity, non-condensing. DIGITAL OUTPUTS 6 binary outputs relay contacts rated at 5A max at 250 VAC. Configured normally open or normally closed.

ANALOG OUTPUTS 6 analog outputs, 1 and 2 are con- figurable for 0 to 10V or 0 to 20mA; 3 through 6 are 0 to 10V only.

UNIVERSAL INPUTS 12 universal inputs are used to monitor input from various sensors. These universal inputs can be set for one of three different sensor input types:

1. Voltage (0 to 10 V), 2. Temperature (resistance temperature detector or thermis-

tor) or discrete contact, or 3. Current (0 to 20 mA). Inputs 1 and 2 may be used for pulse counting.

STANDARD COMMUNICATION PORTS Comm Port:

P1: Communication with the ARC156 networks P2a: Configurable for EIA-232 or EIA-485 (2 wire or

4 wire). Network protocol selectable for BACnet (MS/TP or PTP), Modbus, N2, LonWorks SLTA, or modem.

P2b: Configurable for LonWorks plug-in or Ethernet. RNET PORT Supports up to four RS Standard sensors and one RS Plus, RS Pro for averaging or high/low select control. The sensors can share the Rnet port with BACview.

LOCAL ACCESS PORT For local communication with a laptop computer running virtual BACview.

XNET PORT For communication with the I/O Flex EX8160 expander.

BACNET* SUPPORT Conforms to the Advanced Appli- cation Controller (B-AAC) Standard Device Profile as defined in ANSI/ASHRAE Standard 135-2004 (BACnet) Annex L.

STATUS INDICATION Visual (LED) status of network communication, running, errors, power, transmit/receive for Port 1 and Port 2a and for each of the 12 outputs.

BATTERY 10-year Lithium 3 v coin cell battery, CR2032, provides a minimum of 10,000 hours of data retention during power outages.

PROTECTION Incoming power and network connections are protected by non-replaceable internal solid-state poly- switches that reset themselves when the condition that causes a fault returns to normal. The power, network, input, and output connections are also protected against voltage transient and surge events.

LISTED BY UL-916 (PAZX), CUL-916 (PAZX7), FCC Part 15-Subpart B-Class A, CE EN50082-1997.

WEIGHT 1lb, 3 oz (0.5 kg).

OVERALL DIMENSIONS 5 in. (width) by 113/4 in. (height) by 2 in. (recommended panel depth). 127 mm (width) by 299 mm (height) by 51 mm (recommended panel depth).

MOUNTING HOLE DIMENSIONS Four mounting holes, two above and below.

Width: 4 in. (102 mm) Height: 113/8 in. (289 mm)

Addressing the I/O Flex 6126 Controller The I/O Flex 6126 controllers two rotary switches determine the I/O Flex 6126 controllers MAC address when it is placed on a BACnet/ARC 156 or BACnet MS/TP network. The ro- tary switches define the MAC address portion of the devices BACnet address, which is composed of the network address and the MAC address. They also set the slave address on a Modbus or N2 network, when less than 100.

If the I/O Flex 6126 controller has been wired for power, when changing its address in the field the power switch must be cycled or the screw terminal connector from its power ter- minals labeled Gnd and Hot. The controller reads the address each time power is applied to it.

Using the rotary switches; set the controllers address. Set the Tens (10s) switch to the tens digit of the address, and set the Ones (1s) switch to the ones digit. See Fig. 21. EXAMPLE: If the controllers address is 01, point the arrow on the Tens (10s) switch to 0 and the arrow on the Ones (1s) switch to 1.

NOTE: The I/O Flex 6126 controller recognizes its address only after power has been cycled.

Wiring Inputs and Outputs Refer to Table 25 for wiring inputs and outputs.

Fig. 21 Address Rotary Switch

*BACnet is a registered trademark of ASHRAE.

40

Table 25 Input Wiring Specifications

LEGEND

Input I/O Flex 6126 Controller The I/O Flex 6126 controller has 12 inputs that accept the signal types described below. See Table 26.

Table 26 I/O Flex 6126 Controller Inputs

BINARY OUTPUTS The I/O Flex 6126 controller has 6 binary outputs that can be connected to a maximum of 24 VAC/VDC inputs. Each output is a dry contact rated at 1A, 24 V maximum and is normally open. To size output wiring, consider the following when field installing accessories:

Total loop distance from the power supply to the control- ler, and then to the controlled device

NOTE: Include the total distance of actual wire. For 2-con- ductor wires, this is twice the cable length.

Acceptable voltage drop in the wire from the controller to the controlled device

Resistance (ohms) of the chosen wire gage Maximum current (amps) the controlled device requires

to operate

ANALOG OUTPUTS The I/O Flex 6126 controller has 6 analog outputs that support voltage or current devices. The controlled device must share the same ground as the control- ler and have the following input impedance:

0 to 10 VDC min 500 ohms 0 to 20 mA min 800 ohms

See Table 27 for a detailed list of standard inputs and outputs.

TO WIRE FIELD ACCESSORIES ON THE I/O FLEX 6126 CONTROLLER OR I/O FLEX EX8160 EXPANDER

1. Turn off power to the I/O Flex 6126 controller. 2. Connect the input or output wiring to the screw termi-

nals on the controller:

Connect the shield wire to the GND terminal with the ground wire.

For a loop-powered 4 to 20 mA sensor, wire the sen- sors positive terminal to the + terminal on the I/O Flex 6126 controllers Aux Power Out Port. Wire the sensors negative terminal to an inputs + terminal.

3. Set the appropriate jumpers on the I/O Flex 6126 controller.

4. Connect the binary output wiring to the screw termi- nals on the I/O Flex 6126 controller and to the con- trolled device (Fig. 22).

INPUT MAXIMUM LENGTH MINIMUM GAGE SHIELDING

0-5 VDC 0-10 VDC

1000 feet (305 meters) 26 AWG Shielded

0-20 mA 3000 feet (914 meters) 26 AWG Shielded or unshielded

Thermistor Dry contact Pulse counter

1000 feet (305 meters) 22 AWG Shielded

RTD 100 feet (30 meters) 22 AWG Shielded

ZS sensor BACview Equipment Touch

500 feet (152 meters)

18 AWG, 4 conductor if BACview is connected to the Rnet 22 AWG, 4 conductor if only RS room sensors are connected to the Rnet Shielded or unshielded

AWG American Wire Gage RTD Resistance Temperature Detector

INPUT SIGNAL TYPE SUPPORTED DESCRIPTION

All

Thermistor RTD

010 Vdc 4-20 mA

Type 2 (10 K ohm at 77 F). Input voltages should be from 0.489 VDC to 3.825 VDC

for thermistors.

All Dry contact

A 5 VDC wetting voltage detects contact position, resulting in a

0.5 mA maximum sense current when the contacts are closed.

UI-1, UI-2 0-20 mA Pulse input

The input impedance of the I/O Flex 6126 controller is approximately 1 Mohm.

USE TYPE DESCRIPTION

Any Input

Thermistor Dry Contact

0-5 Vdc 010 Vdc

0-20 mA RTD

Set each inputs Universal Input Mode Select jumper to the type of signal the input

will receive

Aux Power Out Port

Loop-pow- ered

4-20 mA Set the Select jumper to

+5V or +24V as required by the sensor.

Fig. 22 Binary Output Diagram

41

Table 27 50BVJ,W Standard I/O Table

LEGEND * Inputs and outputs are optional. Sensors not provided. 50BV units

do not contain a return fan; return fan control is available for return fan separate from 50BV unit.

Read-only points. No effect on Sequence of Operation.

NOTE: Transformers common terminals are tied together.

INPUT /OUTPUT TYPE TYPICAL DEVICE TYPE OF I/O CONNECTION

PIN NUMBERS

I/O TYPE CONFIG

I/O FLEX 6126 Controller

Inputs

Occupancy Override * Dry Contact (N.O) UI (0-10 V, RTD Therm/Dry, 0-20 mA) UI-12 - 19 & 20 DI

Duct Static Pressure Sensor 0 -5 VDC UI (0-10 V, RTD Therm/Dry, 0-20 mA) UI-11 -17 & 18 AI

Compressor Status (compressor 4) IEM 2 UI (0-10 V, RTD Therm/Dry, 0-20 mA) UI-10 - 16 & 17 DI

Compressor Status (Compressors 1-3) IEM 1 UI (0-10 V, RTD Therm/Dry, 0-20 mA) UI-09 - 14 & 15 DI

Return Air Sensors 10K Type II UI (0-10 V, RTD Therm/Dry, 0-20 mA) UI-08 - 13 & 14 AI

Entering Water Temperature (required for Economizer) 10K Type II UI (0-10 V, RTD Therm/Dry, 0-20 mA) UI-07 - 11 & 12 AI

Supply Air Temperature Sensor 10K Type II UI (0-10 V, RTD Therm/Dry, 0-20 mA) UI-06 - 10 & 11 AI

Relative Humidity Sensor* 0-5 VDC UI (0-10 V, RTD Therm/Dry, 0-20 mA) UI-05 - 8 & 9 AI

CO2 Sensor (Required for demand control ventilation)* 0-5 VDC UI (0-10 V, RTD Therm/Dry, 0-20 mA) UI-04 - 7 & 8 AI

Leaving Water Temperature Sensor (standard) 10K Type II UI (0-10 V, RTD Therm/Dry, 0-20 mA) UI-03 - 5 & 6 AI

UPM II - Compressors 2 & 4 UI Pulse Counting (0-20 mA) UI-02 - 2 & 4 DI - pulse

UPM II - Compressors 1 & 3 UI Pulse Counting (0-20 mA) UI-01 - 2 & 3 DI - pulse

Outputs

Open AO (0-10 V) AO-6 - 11 & 12 AO

Open AO (0-10 V) AO-5 - 9 & 10 AO

Return Fan Speed (VFD Drive Terminal Strip)* ABB ACH550-UH AO (0-10 V) AO-4 - 7 & 8 AO

Open AO (0-10 V) AO-3 - 5 & 6 AO

Modulating Hot Gas Re-heat Valves AO (4-20mA/0-10 V) AO-2 - 3 & 4 AO

Fan Speed - (VFD Drive Terminal Strip AI-1) ABB ACH550-UH AO (4-20mA/0-10 V) AO-1 - 1 & 2 AO

Compressor Stage 4 Command (Y4) BO (Relay 5A at 250Vac) BO-6 - 16-18 BO

Compressor Stage 3 Command (Y3) BO (Relay 5A at 250Vac) BO-5 - 13-15 BO

Compressor Stage 2 Command (Y2) BO (Relay 5A at 250Vac) BO-4 - 10-12 BO

Compressor Stage 1 Command (Y1) BO (Relay 5A at 250Vac) BO-3 - 7-9 BO

Open BO (Relay 5A at 250Vac) BO-2 - 4-6 BO

Supply Fan Enable signal (VFD Drive Terminal Strip) ABB ACH550-UH BO (Relay 5A at 250Vac) BO-1 - 1-3 BO

Xnet Remote Expansion I/O Flex EX8160 expander I/O Expansion Board Xnet Comm-Port

AI Analog Input AO Analog Output BI Digital Input BO Digital Output UI Universal Input

42

Table 27 50BVJ,W Standard I/O Table (cont)

LEGEND * Inputs and outputs are optional. Sensors not provided. 50BV units

do not contain a return fan; return fan control is available for return fan separate from 50BV unit.

Read-only points. No effect on Sequence of Operation.

NOTE: Transformers common terminals are tied together.

INPUT /OUTPUT TYPE TYPICAL DEVICE TYPE OF I/O CONNECTION

PIN NUMBERS

I/O TYPE CONFIG

I/O FLEX EX8160 Expander

Inputs

Open UI (0-5 V, Therm Dry) IN-16 - 15 & 16 UI

Open UI (0-5 V, Therm Dry) IN-15 - 13 & 14 UI

Open UI (0-5 V, Therm Dry) IN-14 - 11 & 12 UI

Open UI (0-5 V, Therm Dry) IN-13 - 9 & 10 UI

Open UI (0-5 V, Therm Dry) IN-16 - 15 & 16 UI

Condenser Water Valve end switch (optional) UI (0-5 V, Therm Dry) IN-11 - 5 & 6 UI

Return Static Sensor 0 -5 VDC UI (0-5 V, Therm Dry) IN-10 - 3 & 4 AI

Open UI (0-5 V, Therm Dry) IN-9 - 1 & 2 DI

Supply Duct High Static* BI (Dry contact) IN-8 - 15 & 16 DI

Supply Fan Thermal Overload* BI (Dry contact) IN-7 - 13 & 14 DI

Water Flow Proving switch BI (Dry contact) IN-6 - 11 & 12 DI

Return Fan Thermal Overload (optional)* BI (Dry contact) IN-5 - 9 & 10 DI

Filter Input* BI (Dry contact) IN-4 - 7 & 8 DI

Return Plenum High Static* BI (Dry contact) IN-3 - 5 & 6 DI

Return Fan Status Switch* BI (Dry contact) IN-2 - 3 & 4 DI

Smoke Detector Input* BI (Dry contact) IN-1 - 1 & 2 DI

Outputs

Open BO (Dry contact) BO-8 - 15 & 16 DO

Open BO (Dry contact) BO-7 - 13 & 14 DO

Open BO (Dry contact) BO-6 - 11 & 12 DO

Open BO (Dry contact) BO-5 - 9 & 10 DO

Return Fan Enable * BO (Dry contact) BO-4 - 7 & 8 DO

Damper Command start/stop* BO (Dry contact) BO-3 - 5 & 6 DO

Economizer Valve Command BO (Dry contact) BO-2 - 3 & 4 DO

Condenser water valve Command (start/stop) BO (Dry contact) BO-1 - 1 & 2 DO

AI Analog Input AO Analog Output BI Digital Input BO Digital Output UI Universal Input

43

5. Connect the analog output wiring to the screw terminals on the I/O Flex 6126 controller and to the controlled de- vice (Fig. 23).

6. Set the AO Mode Select jumper to the type of device the output is being wired to.

7. Turn on the I/O Flex 6126 controllers power (Fig. 24).

I/O Flex EX8160 Expander Module GENERAL DESCRIPTION The I/O Flex EX8160 ex- pander expands the input/output capability of the I/O Flex 6126 controller. The I/O Flex 6126 controller supports one I/O Flex EX8160 expander.

The I/O Flex EX8160 expander is mounted onto the I/O Flex 6126 controller enclosure.

The expander may also be mounted separately within the mounting enclosure. Screw the I/O Flex EX8160 expander into an enclosed panel using the mounting holes provided on the cover plate. Be sure to leave about 2 inches (5 centimeters) on each side for wiring. Connect the I/O Flex EX8160 expander to the I/O Flex 6126 controller before applying power to either one. See Fig. 25. Connecting I/O Flex EX8160 Expander and I/O Flex 6126 Controller 1. Turn off the power to both the I/O Flex EX8160 expander

and the I/O Flex 6126 controller. 2. Wire the screw terminals connecting each devices

XNET Remote Expansion connector.

3. Turn on the power to both the I/O Flex EX8160 expander and the I/O Flex 6126 controller.

BACVIEW6 The BACview6 tool is a keypad/display unit that is required to connect to the I/O Flex 6126 controller to view or edit certain property values and the controllers real time clock.

Connect the BACview6 tool to the I/O Flex 6126 control- lers Rnet port. The I/O Flex 6126 controller can share the Rnet with RS sensors and a second I/O Flex 6126 controller, with no more than 6 devices total on the Rnet. Wire the devices in a daisy-chain or hybrid configuration.

The BACview6 tool can be used with the I/O Flex 6126 controller with a 4-pin Rnet port. For instructions on using/pro- gramming the BACview6 tool, refer to the BACview6 pro- grammers guide.

Water to Air Operation, VAV Units Only 50BVJ,W GENERAL DESCRIPTION The factory-mounted I/O Flex 6126 controller and I/O Flex EX8160 expander are fac- tory configured with the Water to Air application program and factory installed in the unit to be job site ready to run.

The unit will operate in a 100% stand-alone control mode or connect to a Building Automation System (BAS) using open protocols including BACnet (ARCNET and MS/TP), Modbus* RTU, or LonWorks. The controllers also support communications for BACview keypad/display panels. KEY FEATURES AND BENEFITS

Point count: 6 digital outputs, 12 universal inputs, and 6 analog outputs.

Point count: 8 digital outputs, 8 digital inputs and 8 analog inputs

Built-in protocol support: BACnet (ARCNET and MS/TP) and Modbus.

Built-in local access support: BACview6 keyboard/display. On-board lithium battery holds controller time clock settings Program archived in non-volatile memory allows unit to

be ready after long periods of power outages. Parameter settings archived in nonvolatile memory allows

unit configuration to be available after long periods of power outages.

CONTROL AND STATUS PARAMETERS AND ALARMS

Control BACview occupancy schedule System control: Schedule, Manual ON, BAS command

or DI Enable Unit blower control Compressor 1 control Compressor 2 control Compressor 3 control Compressor 4 control Unit Enable manual control (optional) Humidity control (modulating hot gas re-heat optional) Condenser water valve control (flex required) Economizer control Damper control

Status Cooling control status Cooling demand percentage (0 to 100%) Discharge air temperature Return air temperature Leaving water temperature Entering water temperature Unit filter status (optional) Fan-Hours runtime counter (filter replacement indicator) Fan starts counter Compressor 1 starts counter Compressor 2 starts counter Compressor 3 starts counter Compressor 4 starts counter

Fig. 23 Analog Output Diagram

* Modbus is a registered trademark of Schneider Electric. LonWorks is a registered trademark of Echelon Corporation.

44

Fig. 24 I/O Flex 6126 Controller Input Modes and Diagram

45

Alarms Leaving water temperature high/low trip Discharge air temperature high/low trip Entering water temperature high/low trip Sensor failure alarm Unit filter runtime trip (optional) Comp 1 runtime trip Comp 2 runtime trip Comp 3 runtime trip Comp 4 runtime trip Freeze stat sensor UPM alarm (optional) Low pressure sensor UPM alarm High pressure sensor UPM alarm Low pressure sensor UPM alarm High pressure sensor UPM alarm Condensate overflow UPM alarm High/low voltage UPM alarm

Sequence of Operation, VAV Units Only 50BVJ,W See the integration points list on page 65 for specific points and values.

CONTROL SOURCE (RUN CONDITIONS) The unit may have external or internal control sources to initiate heating or cooling operation.

EXTERNAL CONTROL SOURCE The unit may be controlled from the following external sources:

Digital input BAS Building Automation System Manual on

DIGITAL INPUT Provides a method of running the unit by providing a contact closure (On/Off) to UI-12. Digital in- put provides a simple interface for enabling unit operation. Once enabled, the unit will run until the occupied set point has been satisfied.

BAS Provides a network interface to the heat pump. The I/O Flex 6126 controller supports the following building au- tomation protocols:

MANUAL ON Places the unit in manual run mode; the unit will operate until the set point is satisfied.

INTERNAL CONTROL SOURCE (KEYPAD) All con- trollers are provided with a battery backup real time clock. When configured for Keypad, the internal scheduler uses the local time and user schedule to initiate unit operation. Occupied Schedule: 56 F supply air set point (adjustable).

Unit Mode The Unit Mode is used to configure the heat pump per its specific design configuration and applica- tion. A unit mode may be selected from the following:

Cooling only Cooling only with hot gas re-heat

COOLING ONLY The unit is configured for mechanical cooling.

COOLING ONLY WITH HOT GAS RE-HEAT The unit is configured for cooling only with active humidity control. Please see Discharge Air Control with Modulating Re-Heat for additional details.

Fan Modes The Fan mode option is used to select the type of fan hardware being used with the unit. Fan hardware is application specific and will determine the behavior for the specific application for which it is being applied.

The Fan option may be configured with one of the follow- ing options: Supply Air Fan (SAF) Start/Stop (also known as On/Off

signaling) Variable Frequency Drive (or Variable Fan used in VAV

applications) Return Fan interlock with Supply Fan (If SAF runs RAF

runs)

START/STOP FANS The fan enable signal is provided on BO-1 of the I/O Flex 6126 controller; operation is inter- locked with cooling and re-heat operations. The return air fan can be enabled via the BACview tool, and it will be commanded 5 seconds after the supply fan has been en- gaged at all times.

The supply fan can also be set to stop if the return fan is in alarm via the BACview tool. VARIABLE FREQUENCY DRIVE (VFD) FAN The VFD uses an analog signal (0 to 10V) to control the speed of the blower. This signal is output from Analog Output 1 (AO- 1) of the I/O Flex 6126 controller.

Fig. 25 Flex and Expansion XNET Connection

COMMUNICATION PROTOCOL

BACnet Building Automation and Control network

Modbus Common open industrial protocol standard

LonWorks LonWorks Automation and control network (Card required)

46

The supply and return air fan speeds are modulated by inde- pendent PID loops to maintain independent static pressure set points; the factory-provided duct static pressure sensor is re- quired as input (connected to UI 11 for supply and IN-10 for re- turn) on the I/O Flex 6126 controller and the I/O Flex EX8160 expander, for the VFD blower option. Units do not allow for mounting of the Return Fan VFD inside the equipment and re- quire the VFD equipment to be mounted close to the unit. An inside wall in the mechanical room close to the unit is typically used for mounting an external VFD. See Table 28 for VFD fac- tory default settings. SUPPLY AND RETURN FAN OPERATION When the unit control is set for occupied operation the fan will run continuously as the default behavior. If the return fan is en- abled, it will follow the operation of the supply fan mode which may be modified to cycle only during mechanical op- eration. During unoccupied operation the fan will only cycle during a call to maintain a cooling set point.

FAN OPERATION DURING DISCHARGE (SUPPLY AIR TEMPERATURE) AIR CONTROL (DAC) For DAC ap- plications, the fans speed is calculated as a demand percent calculated based on the PID static pressure sensor value and the static pressure set point.

If static pressure reset strategies are utilized the minimum fan speed recommended is 40% of nominal CFM. If the fan de- mand is less than 40% of nominal CFM (20% for the return fan) the PID loop will be disregarded and the fan will run at the minimum value.

Units configured for discharge air control will run only when the controller is in occupancy mode. VFD CONTROL The following applies for VFD Control:

Variable frequency drive fan control requires a static pressure measurement. A duct static pressure sensor is factory supplied to be installed in the field.

The static pressure sensor uses inches of water column as the unit of measure.

The static pressure sensor is configured for UI-11 port of the I/O Flex 6126 controller for the supply duct and IN-10 for the return air duct.

The static pressure set point is user configurable and is used by the static pressure PID control.

The minimum VFD fan speed is user configurable and is set during the test and balance phase of the commission- ing phase.

A high static pressure alarm will be generated for a static pressure exceeding the maximum static pressure trip point for a minimum of 10 minutes.

The static pressure sensor will be range-validated and a sen- sor failure alarm will be generated for a missing sensor.

The VFD output may be switched to a constant value for a smoke event if enabled.

FAN OPERATION DURING SMOKE EVENT The speed of the fan during a smoke event is user configurable for VFD en- abled units (defaults to 100%).

FAN HISTORY STATISTICS The controller will collect fan history statistics and sum the total number of fan start events that occurred in the preceding 1-hour period. The fan history may be reset by the user. Fan history reset may be per- formed locally at the unit with a BACview terminal.

Digital Inputs for Monitoring The controller soft- ware may be configured to provide digital inputs for monitor- ing unit faults and alarms. The equipment integrator must con- figure the input for the appropriate installed option and desired

function. The functional options may be configured via a local terminal or building automation system.

FILTER STATUS (DFS) The I/O Flex 6126 controller has the option of providing a filter alarm for indicating that the filter needs servicing. The filter-status service option may be implemented with hardware or with fan run time. The filter switch hardware is connected directly to IN-4 on the I/O Flex EX8160 expander with a contact closure indicating a service event.

The following applies to the filter status:

The filter status (replacement) may be configured for accumulated running time.

The total fan run time prior to filter service is user con- figurable, factory default 2000 hrs.

The filter timer may be reset upon the filter being serviced.

WATER DIFFERENTIAL PRESSURE SWITCH (DPS) The differential pressure switch is applied to a unit for which the flow of water through the heat exchange must be confirmed prior to the unit operating. The differential pressure switch hardware is connected directly to IN-6.

In addition, the following applies to the DPS option:

An alarm notification is set if the DPS is asserted True (no flow condition).

A DPS alarm will terminate compressor operation. Three DPS events will hard lockout the unit. The DPS hard lockout condition which will keep the unit

off can be cleared by a reset via the BACview tool. A sum of all DPS events will be logged for a 1-hour period.

SMOKE DETECTOR STATUS (SDS) The unit may be set up to receive a smoke event via a contact closure. The smoke detector input is available for field wiring on IN-1 of the I/O Flex EX8160 expander.

The response to a smoke event must be determined by safe- ty regulations and jurisdiction of the local governing body. The smoke detector response must be enabled and set up upon sys- tem start-up. The default behavior for a smoke event will termi- nate the operation of the unit (fan and compressor).

The unit may be configured for operation during a smoke event for specific safety applications. Variable Frequency Drive configured units can be configured for a specific fan speed during a smoke event.

A smoke detector contact closure on IN-1 will produce a Smoke Alert. COMPRESSOR STATUS The unit is equipped with com- pressor status current transducers and Input Expansion Mod- ules (IEM) and will verify that the compressor stages are run- ning by monitoring the status of the current switches. If the compressor fails (no current flow) an individual alarm per com- pressor stage will occur.

The controller will identify the compressor operating in the following three modes: Auto (no alarm) Hand mode Failed

Cooling Operation The controller will maintain the supply air temperature and set point by staging the compres- sor(s). To prevent short-cycling, there is a 10-minute delay be- tween compressor stages. Additionally, there will be a 3-minute delay (adjustable) to prove water flow prior to Compressor 1 operation when the unit is first powered on. The compressor will run subject to internal safeties and controls provided by the UPM board.

47

Table 28 VFD Factory Default Settings

*Refer to Motor name plate.

ABB 550 DRIVE FACTORY CONFIGURATION VFD 1

GROUP NUMBER PARAMETER NUMBER DESCRIPTION VALUE

99

9902 Application Macro HVAC Default

9904 Motor control Mode Scalar

9905 Motor Nominal Voltage

9906 Motor Nominal Current

9907 Motor Nominal Frequency

9908 Motor Nominal Speed

9909 Motor Nominal Power

10

1001 EXT1 Commands DI1 - Start/Stop

1002 EXT2 Commands N/A

1003 Direction Forward

11

1103 REF1 Select AI-1

1104 REF1 Minimum 0Hz at 60Hz/ 0Hz at 50Hz

1105 REF 1 Maximum 60 Hz at 60Hz / 50 Hz at 50Hz

12

1201 Constant Speed Select NOT SEL

1202 Constant Speed Value (Field Programmable) 6Hz - Motor Nominal Frequency

13

1301 Minimum AI-1 0%

1302 Maximum AI-1 100%

1303 Filter AI-1 1 Sec

1304 Minimum AI-2 0%

1305 Maximum AI-2 100%

1306 Filter AI-2 1 Sec

14

1401 Relay Output 1 Ready

1402 Relay Output 2 Run

1403 Relay Output 3 Fault (Inverted)

15

1507 AO2 Content AI-1 (Used to control VFD2 Refer-

1508 AO2 Content Min 0%

1509 AO2 Content Max 100%

1510 Minimum AO2 0.0mA

1511 Maximum AO2 20.0mA

1512 Filter AO2 1 Sec

16

1601 Run Enable DI-1

1608 Start Enable 1 DI-4

1609 Start Enable 2 N/A

20

2002 Minimum Fan Speed 0

2003 Maximum Current 30% higher that Motor (s) FLA

2007 Minimum Frequency 0Hz

2008 Maximum Frequency 60Hz / 50Hz (Per motor frequency rat-

21 2101 Start Function Fly Start

2102 Stop Function Coast

22 2202 Accelerate Time 30 Seconds

2203 Decelerate Time 30 Seconds

26

2605 Volt/ Freq Ratio Square

2606 Switching Frequency 4Khz

2607 Switching Frequency Control ON

48

Table 28 VFD Factory Default Settings (cont)

ABB 550 DRIVE FACTORY CONFIGURATION VFD 1

GROUP NUMBER PARAMETER NUMBER DESCRIPTION VALUE

30

3006 Motor Thermal Time 1050s

3007 Motor Load Curve 100%

3008 Zero Speed Load 70%

3009 Break Point Frequency 35Hz

3010 Stall Function NOT SEL

3011 Stall Frequency 20 Hz

3012 Stall Time 20 Sec

3017 Earth Fault Enabled

31

3101 Number of Retries 5

3102 Trial Time 30Sec

3103 Delay Time 6 Sec

3104 AR Overcurrent Enabled

3105 AR Overvoltage Enabled

3106 AR Undervoltage Enabled

3107 AR AI

3108 AR External Fault (0) Disabled

34

3401 Signal Parameter 1 Output Freq

3402 Signal 1 Minimum 0

3403 Signal 1 Maximum 60 / 50 (Maximum motor operating Hertz)

3404 Output 1 DPS Form 0

3405 Output 1 DSP Unit % SP

3406 Output 1 Minimum 0

3407 Output 1 Maximum 100

3408 Signal Parameter 2 Current (Motor Current Measured by the Drive)

3409 Signal 2 Minimum 0

3410 Signal 2 Maximum FLA + 15% A

3411 Output 2 DPS Form 0

3412 Output DSP Unit A (2)

3413 Output 2 Minimum 0

3414 Output 2 Maximum FLA + 15% A

3415 Signal Parameter 3 AI-1

3416 Signal 3 Minimum 0

3417 Signal 3 Maximum 10

3418 Output 3 DPS Form 0

3419 Output DSP Unit V (2)

3420 Output 3 Minimum 0

3421 Output 3 Maximum 10

40

4001 Gain 2.5

4002 Integration Time 3Sec

4005 Error Value Inver NO

4006 Units %

4007 Display Format x.xxx

4010 Setpoint Select Internal

4012 Setpoint Minimum 0V

4013 Setpoint Maximum 10V

4027 PID1 Parameter Set SET1

49

Table 28 VFD Factory Default Settings (cont)

DRIVE FACTORY CONFIGURATION VFD 2

GROUP NUMBER PARAMETER NUMBER DESCRIPTION VALUE

99

9902 Application Macro HVAC Default

9904 Motor control Mode Scalar

9905 Motor Nominal Voltage *

9906 Motor Nominal Current *

9907 Motor Nominal Frequency *

9908 Motor Nominal Speed *

9909 Motor Nominal Power *

10

1001 EXT1 Commands DI1 - Start/Stop

1002 EXT2 Commands N/A

1003 Direction Forward

11

1103 REF1 Select AI-1

1104 REF1 Minimum 0Hz at 60Hz/ 0Hz at 50Hz

1105 REF 1 Maximum 60 Hz at 60Hz / 50 Hz at 50Hz

12 1201 Constant Speed Select NOT SEL

1202 Constant Speed Value (Field Programmable) 6Hz - Motor Nominal Frequency

13

1301 Minimum AI-1 0% 1302 Maximum AI-1 100%

1303 Filter AI-1 1 Sec

1304 Minimum AI-2 0% 1305 Maximum AI-2 100%

1306 Filter AI-2 1 Sec

14

1401 Relay Output 1 Ready

1402 Relay Output 2 Run

1403 Relay Output 3 Fault (Inverted)

15

1507 AO2 Content AI-1

1508 AO2 Content Min 0%

1509 AO2 Content Max 100%

1510 Minimum AO2 0.0mA

1511 Maximum AO2 20.0mA

1512 Filter AO2 1 Sec

16

1601 Run Enable DI-1

1608 Start Enable 1 DI-4

1609 Start Enable 2 N/A

20

2002 Minimum Fan Speed 0

2003 Maximum Current 30% higher that Motor (s) FLA

2007 Minimum Frequency 0Hz

2008 Maximum Frequency 60Hz / 50Hz (Per motor frequency rating)

21 2101 Start Function Fly Start

2102 Stop Function Coast

22 2202 Accelerate Time 30 Seconds

2203 Decelerate Time 30 Seconds

26

2605 Volt/ Freq Ratio Square

2606 Switching Frequency 4Khz

2607 Switching Frequency Control ON

*Refer to Motor name plate.

50

Table 28 VFD Factory Default Settings (cont)

DRIVE FACTORY CONFIGURATION VFD 2

GROUP NUMBER PARAMETER NUMBER DESCRIPTION VALUE

30

3006 Motor Thermal Time 1050s

3007 Motor Load Curve 100%

3008 Zero Speed Load 70%

3009 Break Point Frequency 35Hz

3010 Stall Function NOT SEL

3011 Stall Frequency 20 Hz

3012 Stall Time 20 Sec

3017 Earth Fault Enaled

31

3101 Number of Retries 5

3102 Trial Time 30Sec

3103 Delay Time 6 Sec

3104 AR Overcurrent Enabled

3105 AR Overvoltage Enabled

3106 AR Under voltage Enabled

3107 AR AI

3108 AR External Fault (0) Disabled

34

3401 Signal Parameter 1 Output Freq

3402 Signal 1 Minimum 0

3403 Signal 1 Maximum 60 / 50 (Maximum motor operating Hertz)

3404 Output 1 DPS Form 0

3405 Output 1 DSP Unit % SP

3406 Output 1 Minimum 0

3407 Output 1 Maximum 100

3408 Signal Parameter 2 Current (Motor Current Measured by the Drive)

3409 Signal 2 Minimum 0

3410 Signal 2 Maximum FLA + 15% A

3411 Output 2 DPS Form 0

3412 Output DSP Unit A (2)

3413 Output 2 Minimum 0

3414 Output 2 Maximum FLA + 15% A

3415 Signal Parameter 3 AI-1

3416 Signal 3 Minimum 0

3417 Signal 3 Maximum 20mA

3418 Output 3 DPS Form 0

3419 Output DSP Unit mA(2)

3420 Output 3 Minimum 0

3421 Output 3 Maximum 20

40

4001 Gain 2.5

4002 Integration Time 3Sec

4005 Error Value Inver NO

4006 Units %

4007 Display Format x.xxx

4010 Setpoint Select Internal

4012 Setpoint Minimum 0V

4013 Setpoint Maximum 10V

4027 PID1 Parameter Set SET1

*Refer to Motor name plate.

51

For discharge air control applications the minimum on- times and off-times in Table 29 are applicable:

Table 29 Discharge Air Control

If for any reason the compressor alarms reset, the unit com- pressors will start within 10 seconds of each other. COOLING Cooling will be enabled whenever:

Unit is in occupied mode The fan output is on The loop valve is open

COOLING MODE When commanded into cooling mode, the unit will energize the condenser water valve and wait for its valve end switch to be made prior to energizing the compressors.

Once the valve has been proved open the unit will com- mand the compressor to stage according to the cooling percent- age required. This value is provided via a reverse acting PID loop which compares the supply air temperature (SAT) value and the SAT cooling set point (AV:66).

The unit monitors return air temperature to assure air enter- ing the unit is greater than 60 F (adjustable) prior to running in the cooling with modulating hot gas reheat, when the controller is set to operate with multiple reset points. If the controller is set to operate with single return temperature reset the factory default value will be the free cooling value 50 F (adjustable).

If at any time the cooling set point is greater than the return air temperature (RAT) the unit will enter into economizer assist mode. Compressors will be staged as follows:

Compressor 1 will run:

When the fan is running AND the condenser valve is proved. AND the cooling demand is greater than 25%

Compressor 2 will run:

When compressor one has run for 10 minutes AND the cooling demand is greater than 50%

Compressor 3 will run:

When compressor two has run for 10 minutes AND the cooling demand is greater than 75%

Compressor 4 will run:

When compressor 2 has run for 10 minutes AND the cooling demand is greater than 90% When the unit runs in cooling mode the hot gas re-heat valve

will be enabled and modulated to maintain supply air tempera- ture set point, factory default is 55 F (AV:93, adjustable) 4 F. DISCHARGE AIR CONTROL WITH MODULATING RE-HEAT When in cooling mode, if the unit is equipped with modulating hot gas re-heat, the hot gas re-heat will be enabled and modulated to maintain supply air temperature set point, factory default is 55 F (adjustable) 4 F.

The cooling stages can be reset based on a single point or multiple return air temperature (RAT) values as follows:

All values have a hysteresis of 2.0 F. If discharge air set point reset is required, when the value of

the discharge air set point is greater than the value of the return air reset for a particular compressor, the return limit will have to be adjusted via the BACnet tool to compensate for the de- mand changes and release. The particular compressor stage or the unit must be set to a single reset point and the discharge set point reset can be adjusted as needed.

Any of the following alarms will immediately shut down all compressor stages. Refer to the sensor section or the integra- tion points list for default values: Leaving water high Leaving water low Entering later low Fan alarms Low static pressure Water differential pressure switch (DPS) Smoke

DISCHARGE AIR TEMPERATURE (DAT) SENSOR The DAT sensor is shipped loose in the electrical controls box com- partment and is to be field installed in the supply duct work and terminated on UI-6 of the I/O Flex 6126 controller.

The sensor should be installed where the air flow pattern is laminar to avoid temperature stratification. If supplemental heating is to be installed then the DAT sensor should be mount- ed downstream of the discharge side of the heating coil. HIGH DISCHARGE AIR TEMPERATURE CONDITION (COOLING) DAT measurements are tested for a high limit trip above 70 F. An alarm is asserted for high discharge air temperature under the following conditions:

DAT is above the high limit for 5 minutes Fan operation asserted Cooling mode Valid DAT sensor measurement

HIGH STATIC LOCK The controller will monitor the static pressure high limit switch (if installed) and will incre- ment a counter every time the static pressure switch trips. A High Static Alarm will be generated, and will reset automat- ically. Upon receiving the alarm 3 times, the unit will lock out to protect the ductwork and prevent cycling of major unit components.

If the lock state is reached in addition to the high static alarm, code 100 will be set and broadcast over the BACnet net- work via the Systems Status point (AV: 16).

Since the controller interprets this as an issue that needs technical assistance, the unit can only be reset from its HMI BACview tool.

COMPR 1 COMPR 2 COMPR 3 COMPR 4

Min ON

Min OFF

Min ON

Min OFF

Min ON

Min OFF

Min ON

Min OFF

10 5 10 5 10 5 7 5

Single: Free Cooling 50 F < RAT Mechanical Cooling RAT > 50 F (enabled) Multiple: Free Cooling 50 F < 59F Mechanical Cooling (Comp 1) 60 F < 69 F (adj.) Mechanical Cooling (Comp 2) 70 F < 77 F (adj.) Mechanical Cooling (Comp 3) 78 F < 83 F (adj.) Mechanical Cooling (Comp 4) RAT > 83 F (adj.)

52

WATERSIDE ECONOMIZER MODE If the entering water temperature is less than the set point 55 F (adjustable) the unit will transition to economizer mode:

Disable mechanical cooling stage 1 operation for mini- mum of 12 minutes.

Enable economizer valve. Waterside economizer will operate until the entering

water temperature reset value is reached; default is 58 F (adjustable).

When in economizer mode, if the entering water tempera- ture reaches the reset value in less than 5 minutes, the first stage of mechanical cooling operation will be disabled for at least 5 minutes.

In economizer operation, if the unit requires additional stag- es of mechanical cooling, the controller will command them according to the unit demand percentage calculated by the Cooling PID. If additional stages of cooling were running those will be maintained.

The fan will continue to modulate to meet the static pressure set point, the economizer valve will be commanded to open, and the economizer will be treated as the first stage of cooling. LEAVING WATER TEMPERATURE (LWT) The con- troller will monitor the leaving water temperature. Alarms will be provided as follows:

High Leaving Water Temp: If compressor(s) is running and the leaving water temperature is greater than 135 F (adjustable).

Low Leaving Water Temp: If compressor(s) is running and the leaving water temperature is less than 33 F (adjustable).

Leaving Water Sensor Failure: If leaving water sensor outside of normal operating limits. Should a High or

Low Leaving Water Temperature Alarm occur, the call for cooling will be removed.

UPM Fault Monitor The controller will monitor both Unit Protection Modules (UPM1 and UPM2) fault inputs.

Upon hard lockout alarm, compressors are disabled by the UPM board.

Alarms will be provided through BACnet point current alarm (AV:17) as follows: HP1: High Pressure Alarm (circuit 1) HP2: High Pressure Alarm (circuit 2) LP1: Low Pressure Alarm (circuit 1) LP2: Low Pressure Alarm (circuit 2) HP3: High Pressure Alarm (circuit 3) HP4: High Pressure Alarm (circuit 4) LP3: Low Pressure Alarm (circuit 3) LP4: Low Pressure Alarm (circuit 4) FRE: Freeze Alarm FRE2: Freeze Alarm CON: Condensate Alarm B RN: Brownout Alarm

Troubleshooting COMMUNICATION LEDS The LEDs indicate if the controller is speaking to the devices on the network. The LEDs should reflect communication traffic based on the baud rate set. The higher the baud rate the more solid the LEDs become.

The Run and Error LEDs indicate controller and network status. See Table 30 for Communication LEDs and Table 31 for Run and Error LEDs.

Table 30 Communication LEDs

NOTE: The I/O Flex 6126 controller is protected by internal solid- state polyswitches on the incoming power and network connections. These polyswitches are not replaceable, but they will reset them- selves if the condition that caused the fault returns to normal.

LEDS STATUS

POWER Lights when power is being supplied to the controller.

RX Lights when the controller receives data from the network segment; there is an Rx LED for Ports 1 and 2.

TX Lights when the controller transits data from the network segment; there is an Tx LED for Ports 1 and 2.

RUN Lights based on controller health.

ERROR Lights based on controller health.

53

Table 31 Run and Error LEDs

COMPLIANCE SERVICE

Compressor Rotation To determine whether or not the compressor is rotating in the proper direction: 1. Connect service gages to suction and discharge pressure

fittings. 2. Energize the compressor.

The suction pressure should drop and the discharge pres- sure should rise, as is normal on any start-up. If the suc- tion pressure does not drop and the discharge pressure does not rise to normal levels:

3. Turn off power to the unit and tag disconnect. 4. Reverse any 2 of the unit power leads.

Reapply power to the unit. The suction and discharge pressure levels should now move to their normal start-up levels. Also, check that the fan is rotating in the proper direction.

Incorrect wiring can lead to improper phase sequence re- sulting in scroll compressor failure due to reverse rotation. Signs of reverse rotation include: Excessive noise Reverse rotation of 3 phase indoor fan Rapid temperature rise on suction tube No pressure differential No cooling

Correct immediately. Shut off power at disconnect and switch any 2 power leads at unit terminal block or pigtails.

Fan Motor Replacement If required, replace the fan motor with an equal or better type and efficiency motor with equal horsepower. The motor must be rated for a VFD or in- verter application. Do not change the horsepower unless there is a system design requirement change and VFD size analysis.

IF RUN LED SHOWS... AND ERROR LED SHOWS... STATUS IS...

2 flashes per second

Off Normal

2 flashes, alternating with Run LED Five minute auto-restart delay after system error

3 flashes, then off The controller has just been formatted

4 flashes, then pause Two or more devices on this network have the same ARC156 network address

1 flash per second The controller is alone on the network

On Exec halted after frequent system errors or control programs halted

5 flashes per second On Exec start-up aborted, boot is running

Off Firmware transfer in progress, boot is running

7 flashes per second 7 flashes per second, alternating with Run LED Ten-second recovery period after burnout

14 flashes per second 14 flashes per second, alternating with Run LED Burnout

Alternating flashes with Error LED Alternating flashes with the Run LED The controller files have been archived

On On

Failure. Try the following solutions: Turn the I/O Flex 6126 controller off, then on. Format the I/O Flex 6126 controller. Download memory to the I/O Flex 6126 controller. Replace the I/O Flex 6126 controller.

CAUTION

This unit uses a microprocessor control system. Do not short or jumper between terminations on circuit boards or modules; control or board failure may result. Be aware of electrostatic discharge (static electricity) when handling or making contact with circuit boards or module connections. Always touch a chassis (grounded) part to dissipate body electrostatic charge before working inside control center. Use extreme care when handling tools near boards and when connecting or disconnecting terminal plugs. Circuit boards can easily be damaged. Always hold boards by the edges and avoid touching components and connections. This equipment uses, and can radiate, radio frequency energy. If not installed and used in accordance with the instruction manual, it may cause interference to radio communications. It has been tested and found to comply with the limits for a Class A computing device pursuant to International Standard in North America EN61000-2/3 which are designed to provide reasonable protection against such interference when operated in a commercial environment. Operation of this equipment in a residential area is likely to cause interference, in which case the user, at his own expense, will be required to take whatever mea- sures may be required to correct the interference. Always store and transport replacement or defective boards in an anti-static shipping bag.

CAUTION Improper phase sequence will cause scroll compressor failure due to reverse rotation.

54

CHECK/CHANGE VFD OUTPUT CURRENT LIMIT The VFD provides additional fan motor protection by limiting the output current to a programmed value. This value has been factory set according to the factory-installed motor and VFD sizing options.

If the VFD and/or motor is replaced, the VFD setup mode parameter "tHr1" should be reprogrammed to the following calculated values for optimum motor protection and operating range: For VFD size about equal to motor: tHr1 = 100*motor nameplate Amps / VFD rated output Amps

MAINTENANCE

Cleaning Unit Exterior Unit exterior panels should be wiped down using a damp soft cloth or sponge with a mix- ture of warm water and a mild detergent.

Coil Cleaning Hot water, steam, and direct expansion coils must be cleaned at least once a year to maintain peak per- formance. Dirty coils can contribute to decreased heating or cooling capacity and efficiency, increased operating costs, and compressor problems on direct expansion systems. Dirt, grease, and other oils can also reduce the wettability of the coil surfaces, which can result in moisture blow-off from cooling coils and resulting water leakage problems. If the grime on the surface of the coils becomes wet, which commonly occurs with cooling coils, microbial growth (mold) can result, causing foul odors and health-related indoor air quality problems.

Coils can become dirty over a period of time, especially if air filter maintenance is neglected. Coils should be in- spected regularly and cleaned when necessary. Clean coils with a vacuum cleaner, fresh water, compressed air, or a bristle brush (not wire). Do not use high-pressure water or airdamage to fins may result. Backflush coil to remove debris. Commercial coil cleaners may also be used to help remove grease and dirt. Steam cleaning is NOT recom- mended. After cleaning, use a fin comb of the correct fin spacing when straightening mashed or bent coil fins.

Units installed in corrosive environments should be cleaned as part of a planned maintenance schedule. In this type of application, all accumulations of dirt should be cleaned off the coil.

Inspection Check coil baffles for tight fit to prevent air from bypassing the coil. Check panels for air leakage, particu- larly those sealing the fan and coil compartments. Check for loose electrical connections, compressor oil levels, proper re- frigerant charge, and refrigerant piping leaks. Before start-up, be sure all optional service valves are open.

Air Filters The 50BV single-piece units come with 1-in. filters. The standard 1-in. filters provide lower pressure drop and longer filter service intervals. The 50BV modular units come with 4-in. filters.

Inspect air filters every 30 days and replace filters as necessary.

Replacement filters should have a minimum efficiency rat- ing of MERV 6 per ASHRAE rating procedures and be rated for up to 625 fpm velocity. Job requirements or local codes may specify higher minimum ratings.

Condensate Drains Clean the drain line and unit drain pan at the start of each cooling season. Check flow by pouring water into the drain.

Water-Cooled Condensers Water-cooled condens- ers may require cleaning of scale (water deposits) due to im- properly maintained closed-loop water systems. Sludge build-

up may need to be cleaned in an open tower system due to in- ducted contaminants.

Local water conditions may cause excessive fouling or pit- ting of tubes. Condenser tubes should be cleaned at least once a year, or more often if the water is contaminated.

Proper water treatment can minimize tube fouling and pitting. If such conditions are anticipated, water treatment analysis is recommended. Refer to the System Design Manual, Part 5, for general water conditioning information.

Isolate the supply and return water connections when re- moving piping to the condenser.

Clean condensers with an inhibited hydrochloric acid solu- tion. The acid can stain hands and clothing and attack concrete, and, without inhibitor, can attack steel. Cover surroundings to guard against splashing. Vapors from vent pipe are not harmful, but take care to prevent liquid from being carried over by gases.

Warm solution acts faster, but cold solution is just as effec- tive if applied for a longer period. GRAVITY FLOW METHOD (FIG. 26) Do not add solu- tion faster than the vent can exhaust the generated gases.

When condenser is full, allow the solution to remain over- night; then drain the condenser and flush with clean water. Fol- low acid manufacturers instructions. FORCED CIRCULATION METHOD (FIG. 27) Fully open the vent pipe when filling the condenser. The vent may be closed when the condenser is full and the pump is operating.

Regulate the flow to the condenser with a supply line valve. If the pump is the non-overloading type, the valve may be fully closed while the pump is running.

For average scale deposit, allow the solution to remain in the condenser overnight. For heavy scale deposit, allow a full 24 hours. Drain the condenser and flush with clean water. Follow acid manufacturers instructions.

CAUTION

Follow all safety codes. Wear safety glasses and rubber gloves when using inhibited hydrochloric acid solution. Observe and follow acid manufacturers instructions.

Fig. 26 Gravity Flow Method

55

Fan Motor Lubrication The fan motor was properly lubricated at the time of manufacture. Lubricate the fan motor(s) with SAE-20 (Society of Automotive Engineers) non- detergent electric oil.

Fan Bearing Lubrication Inspect the fan bearings for proper lubrication every 6 month or 2500 hours of opera- tion, whichever comes first. Standard units have grease fittings on the fan shaft bearings, located on each side of the blower wheel. Lubricate bearings with a lithium-based grease (NLGI Grade 2).

Fan Sheaves Factory-supplied drives are pre-aligned and tensioned; however, it is recommended that the belt tension and alignment be checked before starting the unit. Always check the drive alignment after adjusting belt tension. To install sheaves on the fan or motor shaft: 1. Isolate power to the unit. 2. Remove side unit access panel(s). 3. Remove any rust-preventive coating on the fan shaft. 4. Make sure the shaft is clean and free of burrs. Add grease

or lubricant to bore of sheave before installing. 5. Mount sheave on the shaft; to prevent bearing damage, do

not use excessive force. Each factory-assembled fan, shaft, and drive sheave assem-

bly is precision aligned and balanced. If excessive unit vibration occurs after field replacement of sheaves, the unit should be rebalanced. To change the drive ratio, follow the steps in the Evaporator Fan Performance Adjustment section (page 55).

After 1 to 3 minutes of operation, check the belt tension. Also check tension frequently during the first 24 hours of oper- ation and adjust if necessary. Periodically check belt tension throughout the run-in period, which is normally the initial 72 hours of operation. ALIGNMENT Make sure that fan shafts and motor shafts are parallel and level. The most common causes of misalign- ment are nonparallel shafts and improperly located sheaves. Where shafts are not parallel, belts on one side are drawn tight- er and pull more than their share of the load. As a result, these belts wear out faster, requiring the entire set to be replaced be- fore it has given maximum service. If misalignment is in the

sheave, belts enter and leave the grooves at an angle, causing excessive belt and sheave wear.

Shaft Alignment Check shaft alignment by measuring the distance between the shafts at 3 or more locations. If the dis- tances are equal, then the shafts are parallel. Sheave Alignment 1. To check the location of the fixed sheaves on the shafts,

use a straightedge or a piece of string. If the sheaves are properly aligned, the string will touch them at the points indicated by the arrows in Fig. 28. Rotate each sheave a half revolution to determine whether the sheave is wob- bly or the drive shaft is bent. Correct any misalignment.

2. With sheaves aligned, tighten cap screws evenly and progressively. NOTE: There should be a 1/8-in. to 1/4-in. gap between the mating part hub and the bushing flange. If the gap is closed, the bushing is probably the wrong size.

3. With taper-lock bushed hubs, be sure the bushing bolts are tightened evenly to prevent side-to-side pulley wob- ble. Check by rotating sheaves and rechecking sheave alignment. When substituting field-supplied sheaves for factory-supplied sheaves, only the motor sheave should be changed.

Evaporator Fan Performance Adjustment To change fan speeds from factory settings: 1. Shut off unit power supply. 2. Loosen nuts on the 4 carriage bolts in the mounting

base. Using adjusting bolts and plate, slide the motor and remove the belt.

3. Loosen movable-pulley flange setscrew. 4. Screw the movable flange toward the fixed flange to

increase speed, and away from the fixed flange to decrease speed. Increasing the fan speed increases the load on the motor. Do not exceed the maximum speed specified in Tables 2 and 3.

5. Set the movable flange at nearest keyway of the pulley hub and tighten the setscrew. (See Tables 2 and 3 for speed change for each full turn of pulley flange.)

6. Replace and tighten the belts (see Belt Tension Adjust- ment section).

7. Restore power to the unit. To align fan and motor pulleys: 1. Loosen fan pulley setscrews.

IMPORTANT: PILLOW BLOCK STYLE FAN BEAR- INGS: Bearings have been prelubricated with high quality grease. Bearings must be relubricated once every 6 months or every 2500 hours of operation, whichever comes first.

Fig. 27 Forced Circulation Method

Fig. 28 Sheave Alignment

a50-7135tf

56

2. Slide fan pulley along fan shaft. 3. Make angular alignment by loosening motor from

mounting plate. 4. Restore power to unit.

BELT TENSION ADJUSTMENT Using a gage, apply 4 lb of force to the center of the belt and adjust the tension until a deflection of 1/64-in. is achieved for every inch of shaft center distance. See Fig. 29.

Ideal belt tension is the lowest value under which belt slip will not occur at peak load conditions.

Compressor Oil All units are factory charged with oil. It is not necessary to add oil unless compressor(s) is re- moved from the unit. If necessary, oil can be removed/charged via Schrader fitting. Operate the system at high evaporator tem- perature prior to oil recharge to assist oil return to the compres- sor(s) from other system components. If necessary, recharge the system as shown in Table 32.

Table 32 Oil Recharge

TROUBLESHOOTING Refer to Tables 33 and 34 to determine the possible cause of the problem and the associated procedure necessary to correct it.

BELT SPAN

LB FORCE

DEFLECTION

Fig. 29 Fan Belt Tension

a50-7136ef

50BV UNIT SIZE COMPRESSOR OIL CHARGE (OZ) OIL TYPE

C, Q, J

020 ZP94KCE 81

3MA-POE

024 ZP103KCE 106

028 ZP137KCE 106

034 ZP182KCE 106

T, V, W

034 ZP182KCE 106

044 ZP120KCE 106

054 ZP137KCE 106

064 ZP182KCE 106

57

Table 33 Unit Troubleshooting

LEGEND

PROBLEM POSSIBLE CAUSE CORRECTION PROCEDURE

Unit Will Not Start. Loss of unit power Check power source. Check fuses, circuit breakers, disconnect switch. Check electrical contacts.

Unit voltage not correct Check and correct.

Open fuse Check for short circuit in unit.

Open protection device Check relays (phase monitor option), contacts, pressure switches.

Unit or motor contactor out of order Test and replace if necessary.

Fan Does Not Operate. Contactor or relay overload or out of order Test and replace if necessary.

VFD not running Confirm VFD parameters set.

Motor defective Test and replace if necessary.

Broken belt Replace belt.

Loose electrical contact Tighten contact.

Compressor is Noisy, But Will Not Start.

Under voltage Check and correct.

Defect in compressor motor Replace compressor.

Missing phase Check and correct.

Compressor seized Check and replace if necessary.

Compressor Starts, But Does Not Continue to Run.

Compressor or contact defect Test and replace if necessary.

Unit is under charged Check and correct any leaks. Add refrigerant.

Unit is too big Check load calculation.

Compressor is overloaded Check protection device and replace. Check for missing phase. Check TXV. Check temperature in suction discharge line.

Unit is Noisy. Compressor noise Check TXV and replace if necessary. Compressor rotation incorrect; check and correct. Check internal noise.

Tube vibration or condenser water problem Check and correct.

Unit panel or part vibrating Check and tighten appropriate part.

Unit Runs Continuously, But Has Low Capacity.

Unit is too small Check load calculation.

Low refrigerant or noncondensing gas pres- ent

Check for leaks and add refrigerant or gas as necessary.

Compressor defect Check pressure and amps. Replace if necessary.

Insufficient flow of refrigerant in evaporator Check filter drier and replace if necessary. Check TXV and adjust or replace if necessary. Check position of TXV bulb and equalizer.

Oil in evaporator Drain evaporator.

Low airflow Check filters, and clean or replace as necessary. Check coils, and clean as necessary. Check for restrictions in ductwork. Check fan rotation and adjust. Check fan motor. Check belts for wear.

High Discharge Pressure. Low waterflow in condenser Purge air.

Dirty condenser tubes. Clean condenser.

High temperature in condenser water Check water tower fans and pumps.

Overcharged Check and reclaim excess charge. Adjust subcooling.

Noncondensing gas present Verify and correct.

TXV Thermostatic Expansion Valve VFD Variable Frequency Drive

58

Table 34 CV Units LED Diagnostic Codes

*Freeze protection and condensate overflow lockout require optional sensors. NOTE: The main control board has a red LED (light-emitting diode) for fault indication and will blink a code as described above. Count the number of blinks to determine the lockout condition.

SCHEMATICS

Refer to Fig. 30-34 for voltage and wiring schematics.

NO. OF BLINKS DESCRIPTION

1 1st Stage High-Pressure Lockout

2 1st Stage Low-Pressure Lockout

3 2nd Stage High-Pressure Lockout

4 2nd Stage Low-Pressure Lockout

5 Freeze Protection Lockout*

6 Condensate Overflow Lockout*

59

F ig

. 3 0

5

0B V

C ,Q

,T ,V

02 0-

03 4

C o

n st

an t

V o

lu m

e W

ir in

g S

ch em

at ic

T R

A N

S F

O R

M E

R P

R IM

A R

Y

L E

A D

C O

L O

R 12

0 W

hi te

20 8

R ed

24 0

O ra

ng e

27 7

B ro

w n

38 0

P ur

pl e

or Y

el lo

w 46

0 B

la ck

/R ed

57 5

G ra

y

U N

IT P

R O

T E

C T

IO N

M O

D U

LE (

U P

M -I

I) IN

C LU

D E

S B

U IL

T- IN

: 2 70

-3 00

S E

C O

N D

R A

N D

O M

S TA

R T

60

F ig

. 3 1

5

0B V

T ,V

04 4-

06 4

C o

n st

an t

V o

lu m

e W

ir in

g S

ch em

at ic

D D

C

U N

IT P

R O

T E

C T

IO N

M O

D U

LE (

U P

M -I

I) IN

C LU

D E

S B

U IL

T- IN

: 2 70

-3 00

S E

C O

N D

R A

N D

O M

S TA

R T

3 00

S E

C O

N D

D E

LA Y

O N

B R

E A

K

1

20 S

E C

O N

D L

O W

P R

E S

S U

R E

B Y

PA S

S

61

a5 0-

82 36

F ig

. 3 2

5

0B V

J, W

V ar

ia b

le A

ir V

o lu

m e

C o

n tr

o l W

ir in

g D

ia g

ra m

N O

T E

: J um

pe r

in st

al le

d fo

r co

nd en

se r

w at

er fl

ow s

w itc

h w

he n

no t s

up pl

ie d.

1 2 3 4 5S TA

N D

A R

D C

O M

P O

N E

N TS

:

C S

-

C O

M P

R E

S S

O R

S TA

TU S

(1 -4

) -

C U

R R

E N

T S

E N

S O

R (4

IN 4

S TA

G E

U N

IT S

) D

S S

-

D U

C T

S TA

TI C

S E

N S

O R

LW

TS -

L E

A VI

N G

W A

TE R

T E

M P

E R

A TU

R E

S E

N SO

R

R A

T -

R E

TU R

N A

IR T

E M

P E

R A

TU R

E S

E N

S O

R

S A

T -

S U

P P

LY A

IR T

E M

PE R

A TU

R E

S E

N S

O R

O P

TI O

N A

L C

O M

PO N

E N

TS :

[ ] I

N 4

- C O

2 SE

N S

O R

[

] I N

5 - R

E LA

TI V

E H

U M

ID IT

Y S

E N

S O

R

[ ] I

N 7

- E N

TE R

IN G

W A

TE R

T E

M P

S IG

N A

L C

O M

S IG

N A

L C

O M

5

23

2

1

1

4

21

62

a50-8215

F ig

. 3 3

5

0B V

J, W

V ar

ia b

le A

ir V

o lu

m e

C o

n tr

o l E

xp an

d er

M o

d u

le W

ir in

g D

ia g

ra m

+ 13

IN -7

IN -8

1516 14 G

nd

G nd + +

7 IN

-4

IN -6

IN -5

G nd

101112 G

nd +

89 G

nd+

IN -2

IN -3

IN -1

5 4

6 + G nd

G nd

13 2 ++ G nd

IN -1

0

IN -9

3 +G nd

4

G nd +

12

G nd

G nd +

78 6 +

5

G nd

G nd +

1112 10 +

9

G nd

G nd +

1516 14 +

13

IN -1

1

IN -1

2

IN -1

3

IN -1

4

IN -1

5

IN -1

6

E xp

an si

on R

em ot

e X

ne t

G nd

X ne

t - X

ne t +

12 B

O -1

B O

-2

B O

-3

B O

-4

B O

-6

B O

-5

345678910111213141516

B O

-7

B O

-8

B O

R at

in g

5A @

2 50

V A

C

B in

ar y

LE D

s

R un

E rr

or

24 V

-a c

O n

O ff

P ow

er

M ad

e in

U S

A

C on

du ct

or s

O nl

y U

se C

op pe

r 13

V A

24 V

ac , 5

0- 60

H zTh

er m

/

N /O

G nd

0- 5V

D ry

0- 5V

U ni

ve rs

al

O ut

pu t

E xp

an de

r A

dd re

ss

Tx R x

O pe

n E

ne rg

y M

an ag

em en

t E qu

ip m

en t

E 14

39 00

88 FO

R

TY P

E : 0

02 30

0

X ne

t B

au d 50

0k

62 .5

k

0- 5V

Th er

m /

D ry

In pu

ts 9

-1 6

D ig

ita l

In pu

ts 1

-8

2 14 356789101112131415162 14 356789101112131415162 14 35678910111213141516 2 13

S TA

N D

A R

D C

O M

P O

N E

N TS

:

R S

S - R

E TU

R N

S TA

TI C

S E

N S

O R

TO 2

4 V

A C

P O

W E

R O

N C

O N

TR O

LL E

R

RS S

0- 5

VD C

CO M

S TA

N D

A R

D C

O M

P O

N E

N TS

:

[ ]

C W

V S

- C O

N D

E N

S E

R W

A TE

R V

A LV

E S

TA TU

S [

] FA

- F IR

E A

LA R

M IN

P U

T [

] FS

S - F

IL TE

R S

TA TU

S S

W IT

C H

[ ]

R FS

- R

E TU

R N

F A

N S

TA TU

S S

W IT

C H

[ ]

R P

H S

- R

E LI

E F

P LE

N U

M H

IG H

S TA

TI C

[ ]

R FO

V - R

E TU

R N

F A

N M

O TO

R O

V E

R LO

A D

[ ]

S D

H S

- S U

P P

LY D

U C

T H

IG H

S TA

TI C

[ ]

S FO

V - S

U P

P LY

F A

N M

O TO

R O

V E

R LO

A D

1 2

TO X

ne t P

O R

T O

N I/

O 6

12 6

C O

N TR

O LL

E R

1 C

O N

TR O

LL E

R IS

P O

W E

R E

D FR

O M

TR A

N S

FO R

M E

R 3

D E

N O

TE S

F IE

LD T

E R

M IN

A TE

D C

O M

P O

N E

N TS

2

D E

N O

TE S

O P

TI O

N A

L W

IR IN

G D

E N

O TE

S O

P TI

O N

A L

W IR

IN G

TR A

N S

FO R

M E

R S

C O

M M

O N

T E

R M

IN A

LS A

R E

TI E

D T

O G

E TH

E R

TO 2

4 V

A C

R A

N D

C F

R O

M U

N IT

TR A

N S

FO R

M E

R

AB B

AC H

55 0-

U H

X1 T

ER M

IN AL

B LO

CK VF

D D

RI VE

T ER

M IN

AT IO

N D

ET AI

LS

X 1

TE R

M IN

A L

A N

A LO

G IN

P U

TS

1 S

C R

2 A

I1

3 A

G N

D

4 10

V D

C

5 A

I2

6 A

G N

D

7 A

O 1

8 A

O 2

9 A

G N

D

X 1

TE R

M IN

A L

D IG

IT A

L IN

P U

TS

1 24

V D

C

2 G

N D

3 D

C O

M

4 D

I1

5 D

I2

6 D

I3

7 D

I4

8 D

I5

9 D

I1 6

AO 4

G nd

TO A

O 3

O N

I/ O

6 12

6 C

O N

TR O

LL E

R

FA

3

3 R

E TU

R N

F A

N S

TA R

T S

TO P

C O

N D

E N

S E

R W

A TE

R V

A LV

E

E C

O N

O M

IZ E

R

D A

M P

E R

S TA

R T

S TO

P

SD H

S

SF O

V

FS S

CW VS

RD H

S

RF O

V

D PS

63

E C

O N

O M

IZ ER

V AL

VE

R E

TU R

N A

IR

O PE

N /

C LO

SE

D I

S U

P P

LY F

AN

D PS

T O

U TS

ID E

AI R

TE M

P S

EN SO

R

D ES

A C

T

D O

V A

LV E

D A

TS

D O

A I

D ES

A C

T

A I

LW T

V FD

V A

R IA

B LE

FR E

Q U

E N

C Y

D R

IV E

AO

D O

C O

2

A I

R A

TS

T A I

T A I

P A I

C

D O

V A

LV E

AO R H

E C

U N

IT M

O U

N TE

D D

D C

S P

S

1 2 D

O A

I E

C O

N O

M IZ

ER

M O

D U

LA TI

N G

H O

T G

A S

R EH

EA T

D X

1 2

1 | 2

W A

TE R

S ID

E E

C O

N O

M IZ

ER

H A ID

H S

FI LT

ER R

E H

EA T

O U

TS ID

E A

IR D

AM PE

R

C O

M PR

ES SO

R S

TA R

T/ ST

O P

FA N

S TA

R T/

ST O

P

E W

T

D U

C T

H U

M ID

IT Y

S EN

SO R

D U

C T

S TA

TI C

P R

E S

SU R

E S

EN SO

R

D U

C T

TE M

P S

EN SO

R D

U C

T TE

M P

S EN

SO R

O U

TS ID

E AI

R

3 D

O

4 D

O

FA N

S P

E ED

FI LT

E R

S TA

TU S

(O P

TI O

N A

L -

N O

T P

R O

V ID

E D

)

(O A

T S

E N

S O

R O

P TI

O N

A L

- N

O T

P R

O V

ID E

D .

C A

N B

E U

S E

D IN

P

LA C

E O

F R

A TS

)

IN S

ID E

AI R

(C O

2 S

E N

S O

R O

P TI

O N

A L

- N

O T

P R

O V

ID E

D )

(D H

S O

P TI

O N

A L

- N

O T

P R

O V

ID E

D )

F ig

. 3 4

5

0B V

J, W

S en

so r

S ch

em at

ic

64

SENSORS AND INTEGRATION POINTS Refer to Table 35 for factory-provided sensors and Table 36 for a detailed integration points list.

Table 35 Factory-Provided Sensors for VAV Units 50BVJ,W

*1 per compressor.

UNIT DESCRIPTION QTY SHIPPING LOCATION INSTALLATION LOCATION

50BVJ 020-034

Supply Air Temperature sensor 1 loose for field installation Supply air stream

Return Air Temperature Sensor 1 loose for field installation Return air stream

Entering Water Temperature 1 Installed Condenser entering water

Leaving Water Temperature 1 Installed Condenser leaving water

Duct Static Pressure Sensor 1 loose for field installation Supply air stream

Compressor Current Transducer * Installed Unit electrical box

50BVW 034-064

Supply Air Temperature Sensor 1 loose for field installation Supply air stream

Return Air Temperature Sensor 4 loose for field installation Return air stream

Entering Water Temperature 1 Installed Condenser entering water

Leaving Water Temperature 1 Installed Condenser leaving water

Duct Static Pressure Sensor 1 loose for field installation Supply air stream

Compressor Current Transducer * Installed Unit electrical box

65

Table 36 Integration Points List

PROTOCOL MAP MODBUS BACNET LONWORKS OPERATION

DISPLAY NAME READ/ WRITE

REGISTER TYPE

REGISTER NUMBER

REFERENCE NAME

OBJECT TYPE

OBJECT ID NV NAME SNVT DESCRIPTION

Alarm Status R Discrete Input 5 alm_status BV 24 nvoAlm- Status SNVT_switch(95)

Alarm Status of Unit (see Current Alarm for more information)

Allow CWV Alarm R/W Coil 1 allow_cwv_al rm BV 106 Select

Enable Condensate Water Valve Alarm Pass Through 0 = Off 1 = Enable CWV Alarm

BAS CO2 Sensor Value R/W Holding Regis-

ter (Float) 1 bas_co2_val AV 49 Select CO2 Sensor Value pro- vided by BAS in PPM

BAS DAT Sensor R/W Holding Regis- ter (Float) 3 bas_dat_val AV 90 Select

Discharge Air Tempera- ture (DAT) provided by BAS in F

BAS Return Air Temp R/W Holding Regis-

ter (Float) 5 bas_rat AV 29 Select Return Air Temperature Value provided by the BAS

BAS RH Sensor Value R/W Holding Regis-

ter (Float) 7 bas_rh_sen_ val AV 56 Select Relative Humidity (RH)

provided by BAS in %

BAS SD Input R/W Coil 2 bas_sd_in BV 91 Select Network Parameter to set the BAS Smoke Detector Alarm

Boilerless-Econo- mizer Status R Input Register

(Float) 1 econ_boil_- mode_stat AV 34 Select

Economizer Option Sta- tus 0 = Disabled 1 = Water Side Econo- mizer

BRN R Discrete Input 6 brn_2st BV 10 Select Network Alarm indicat- ing Brownout sense on UPM1

BRN R Discrete Input 7 brn_4st BV 58 Select Network Alarm indicat- ing Brownout sense on UPM2

BV Occupancy Command (BAS) R/W Coil 3 occupan-

cy_cmd BV 1 nviOc- cBASCmd SNVT_switch(95)

Network Parameter to set the Occupancy Command 0 = Unoccupied (Default) 1 = Occupied

C1_FAIL R Discrete Input 8 comp1_fail BV 150 Select

Network Alarm indicat- ing compressor com- manded to run but no current feedback is sensed

C1_HAND R Discrete Input 9 comp1_hand BV 151 Select

Network Alarm indicat- ing compressor is run- ning but the controller is not issuing an auto- matic command.

C2_FAIL R Discrete Input 10 comp2_fail BV 154 Select

Network Alarm indicat- ing compressor com- manded to run but no current feedback is sensed

C2_HAND R Discrete Input 11 comp2_hand BV 155 Select

Network Alarm indicat- ing compressor is run- ning but the controller is not issuing an auto- matic command.

C3_FAIL R Discrete Input 12 comp3_fail BV 157 Select

Network Alarm indicat- ing compressor com- manded to run but no current feedback is sensed

C3_HAND R Discrete Input 13 comp3_hand BV 158 Select

Network Alarm indicat- ing compressor is run- ning but the controller is not issuing an auto- matic command.

C4_FAIL R Discrete Input 14 comp4_fail BV 160 Select

Network Alarm indicat- ing compressor com- manded to run but no current feedback is sensed

C4_HAND R Discrete Input 15 comp4_hand BV 161 Select

Network Alarm indicat- ing compressor is run- ning but the controller is not issuing an auto- matic command.

See legend on page 73.

66

CMP1_RNTM R Discrete Input 16 comp1_rntm BV 35 Select

Compressor 1 Runtime Alarm Status, (8760 Hours) 0 = Off 1 = Timer Has Expired

CMP2_RNTM R Discrete Input 17 comp2_rntm BV 36 Select

Compressor 2 Runtime Alarm Status, (Hours) 0 = Off 1 = Timer Has Expired

CMP3_RNTM R Discrete Input 18 comp3_rntm BV 69 Select

Compressor 3 Runtime Alarm Status (Hours) 0 = Off 1 = Timer Has Expired

CMP4_RNTM R Discrete Input 19 comp4_rntm BV 71 Select

Compressor 4 Runtime Alarm Status (Hours) 0 = Off 1 = Timer Has Expired

Co2 Sensor Ena R/W Holding Regis- ter (Float) 9 co2_sen-

sor_ena AV 26 Select

Zone CO2 Sensor Enable Setup 0 = No CO2 (Default) 1 = CO2 Monitoring 2 = CO2 + Damper 3 = CO2 BAS Monitor- ing 4 = CO2 BAS + Damper 5 = Open Damper as Fan runs

Coil Configuration Status R Input Register

(Float) 3 coil_cfg_sta- tus AV 150 Select

Network Status of Coil Configuration 0 = Parallel 1 = Series

Comp Stage1 Out- put Cmd R Discrete Input 20 cmp_stg1_c

md BV 11 nvoC- mp1Cmd SNVT_switch(95)

Compressor Stage 1 Output Status 0 = Compressor Stage 1 Off 1 = Compressor 1 On

Comp Stage2 Out- put Cmd R Discrete Input 21 cmp_stg2_c

md BV 12 nvoC- mp2Cmd SNVT_switch(95)

Compressor Stage 2 Output Status 0 = Compressor 2 Off 1 = Compressor 2 On

Comp Stage3 Out- put Cmd R Discrete Input 22 cmp_stg3_c

md BV 66 nvoC- mp3Cmd SNVT_switch(95)

Compressor Stage 3 Output Status 0 = Compressor 3 Off 1 = Compressor 3 On

Comp Stage4 Out- put Cmd R Discrete Input 23 cmp_stg4_c

md BV 67 nvoC- mp4Cmd SNVT_switch(95)

Compressor Stage 2 Output Status 0 = Compressor 4 Off 1 = Compressor 4 On

Comp1 Runtime Rst R/W Coil 4 cmp1_rnt-

m_rst BV 13 nviC-

mp1Rn- tRst

SNVT_switch(95) Compressor 1 Runtime Reset. Momentary On/ Off required.

Comp2 Runtime Rst R/W Coil 5 cmp2_rnt-

m_rst BV 14 nviC-

mp2Rn- tRst

SNVT_switch(95) Compressor 2 Runtime Reset. Momentary On/ Off required.

Comp3 Runtime Rst R/W Coil 6 cmp3_rnt-

m_rst BV 68 nviC-

mp3Rn- tRst

SNVT_switch(95) Compressor 3 Runtime Reset. Momentary On/ Off required.

Comp4 Runtime Rst R/W Coil 7 cmp4_rnt-

m_rst BV 70 nviC-

mp4Rn- tRst

SNVT_switch(95) Compressor 4 Runtime Reset. Momentary On/ Off required.

Compressor 1 Sta- tus R Discrete Input 3 comp1_sta-

tus BV 152 Select Network Parameter indi- cating the status of Compressor 1

Compressor 2 Sta- tus R Discrete Input 2 comp2_sta-

tus BV 153 Select Network Parameter indi- cating the status of Compressor 2

Compressor 3 Sta- tus R Discrete Input 1 comp3_sta-

tus BV 156 Select Network Parameter indi- cating the status of Compressor 3

Compressor 4 Sta- tus R Discrete Input 4 comp4_sta-

tus BV 159 Select Network Parameter indi- cating the status of Compressor 4

compressor con- trol status R Input Register

(Float) 5 comp_c- trl_status AV 60 Select

Compressor Control Status 0 = Zone Control 1 = Discharge Air Con- trol

Table 36 Integration Points List (cont)

PROTOCOL MAP MODBUS BACNET LONWORKS OPERATION

DISPLAY NAME READ/ WRITE

REGISTER TYPE

REGISTER NUMBER

REFERENCE NAME

OBJECT TYPE

OBJECT ID NV NAME SNVT DESCRIPTION

See legend on page 73.

67

Compressor Stages R Input Register

(Float) 7 cmp_stgs AV 14 nvoCmp- Stgs

SNVT_count_inc( 9)

Compressor Stages Configured Status 1 = 1 Compressor 1 Stage 2 = 2 Compressor 2 Stages 3 = 3 Compressor 3 Stages (3 and 4 Stage units only) 4 = 4 Compressor 4 Stages (50BV Default)

Compressors mode R/W Holding Regis-

ter (Float) 11 comp_mode AV 70 Select

Compressor Mode Setup 0 = Zone 1 = Discharge Air Con- trol (Default)

CON R Discrete Input 24 con_2st BV 9 Select

UPM Board 1 Conden- sate Alarm 0 = Normal 1 = Condensate Alarm

CON2 R Discrete Input 25 con_4st BV 57 Select

UPM Board 2 Conden- sate Alarm 0 = Normal 1 = Condensate Alarm

Condenser Valve Status R Discrete Input 26 cond_vlv_sta

tus BV 105 Select

Condenser Valve Sta- tus (Closed to Enable Compressor Operation) 0 = Compressor Opera- tion Disabled 1 = Compressor Opera- tion Enabled

Continuous Fan R/W Coil 8 Cont_fan BV 18 Select

Run Fan continuously During Occupancy Mode Setup 0 = Cycle Fan with Com- pressor Operation 1 = Run Fan when Occupied (Default)

Control Source R/W Holding Regis- ter (Float) 13 ctrl_source AV 15 Select

Control Source for Occupancy Setup 0 = Digital Input 1 1 = Keypad Schedule 2 = BAS Occupancy Command 3 = Factory Use 4 = Manual On-Continu- ous (Default)

Cooling Econo R Discrete Input 27 clg_econ BV 63 Select

Network Parameter to set Cooling Econo tem- perature 0 = Hardwired Sensor (Default) 1 = BAS Sensor Value

Cooling Percent- age R Input Register

(Float) 9 clg_pct AV 13 nvoClgPct SNVT_count_inc( 9)

Network Status of Cool- ing Demand in percent- age (%)

Cooling Set point R/W Holding Regis- ter (Float) 57 sat_stpt_cl AV 66 Select

Network Parameter to set the Cooling Set point 55 F (Default)

CSAT_HI R Discrete Input 28 csat_hi BV 80 Select

Network Parameter to set CSAT HI 0 = Hardwired Sensor (Default) 1 = BAS Sensor Value

Current Alarm R Input Register (Float) 11 cur-

rent_alarm AV 17 nvoCurAl m

SNVT_count_inc( 9)

Alarm Status of unit: 0 = No Alarm 1-7 = UPM1 Fault Code 9-16 =UPM2 Fault Code 20 = Output Overridden via Keypad 30 = Sensor Failure 40 = Leaving Water Temp Alarm 50 = Zone Temp Alarm 60 = Discharge Air Tem- perature 70 = Filter Alarm/Com- pressors 1 & 2 Runtime 90 = High CO2 Level Alarm 100 = Supply Fan Locked 110 = Static Press Low

CWV Command R Discrete Input 29 cwv_com- mand BV 109 nvoCwvC

ommand SNVT_switch(95)

Condenser Water Valve Command Status 0 = Off 1 = On

Table 36 Integration Points List (cont)

PROTOCOL MAP MODBUS BACNET LONWORKS OPERATION

DISPLAY NAME READ/ WRITE

REGISTER TYPE

REGISTER NUMBER

REFERENCE NAME

OBJECT TYPE

OBJECT ID NV NAME SNVT DESCRIPTION

See legend on page 73.

68

CWV_FAIL R Discrete Input 30 cwv_fail BV 107 Select Condenser Water Valve Failure Alarm

CWV_HAND R Discrete Input 31 cwv_hand BV 108 Select

Condenser Hand Alarm Condenser Valve Com- mand Enabled without unit commanded

DA_SENS_FAIL R Discrete Input 32 da_sen BV 31 Select

Network Alarm Indicat- ing Discharge Air Sen- sor Failure 0 = Normal 1 = Alarm

Damper Output Cmd R Discrete Input 33 damper_cmd BV 49 nvoDamp-

erCmd SNVT_switch(95) Damper Output Status 0 = Closed 1 = Open

DAT Sensor Selec- tion R/W Holding Regis-

ter (Float) 15 dat_sel AV 81 Select

Discharge Air Tempera- ture Sensor Setup 0 = Hardwired Sensor (Default) 1= BAS Supplied DAT value

DAT Sensor Source Selection Status

R Input Register (Float) 13 dat_sel_sta AV 82 Select

Discharge Air Tempera- ture Sensor Selection Status 0 = Hardwired Sensor DAT 1 = BAS Supplied DAT

DAT_HI R Discrete Input 34 dat_hi BV 29 Select

Discharge Air Tempera- ture Sensor Alarm (Cooling) 0 = Normal 1 = High DAT (Default: >70 F)

Demand Level R/W Holding Regis- ter (Float) 17 demand_leve

l AV 64 Select Demand Level Set point Adjust in F

DO_LOCK R Discrete Input 35 do_lock BV 37 Select

Network Parameter to set DO LOCK 0 = Hardwired Sensor (Default) 1 = BAS Sensor Value

DPS Alarm R Discrete Input 36 DPS_alarm BV 77 Select

Network Parameter to set DPS Alarm 0 = Hardwired Sensor (Default) 1 = BAS Sensor Value

DX_RNTM R Discrete Input 37 dx_rntm BV 79 Select

Network Parameter to set DX RNTM 0 = Hardwired Sensor (Default) 1 = BAS Sensor Value

Eff HGR Mod Valve 1 R Input Register

(Float) 15 eff_hgr_- mod_vlv1 AV 28

nvoEffH- grMod-

Vlv1

SNVT_lev_per- cent(81)

Hot Gas Reheat Modu- lating Valve Output Sta- tus in %

Eff RA Fan Speed R Input Register (Float) 45 eff_ra_fan_-

speed AV 162 nvoEffRa- FanSpeed

SNVT_lev_per- cent(81)

Supply Air Fan Speed Network Status in %

Eff RA Static Pres- sure R Input Register

(Float) 47 eff_ra_sta_- press AV 163 nvoEffRa-

StaPress SNVT_count_inc(

9)

Network Status of the Supply Duct Static Pres- sure Sensor

Eff SA Fan Speed R Input Register (Float) 17 eff_sa_fan_-

speed AV 55 nvoEffSa- FanSpeed

SNVT_lev_per- cent(81)

Supply Air Fan Speed Network Status in %

Eff SA Static Pres- sure R Input Register

(Float) 19 eff_sa_sta_- press AV 53 nvoEffSa-

StaPress SNVT_-

press_p(113)

Network Status of the Supply Duct Static Pres- sure Sensor

Eff Zone Co2 Lev R Input Register (Float) 21 eff_zn_-

co2_lev AV 25 nvoEffZn- Co2Lev

SNVT_count_inc( 9)

Network Status of the CO2 Sensor Levels in PPM

Effect EW Temp R Input Register (Float) 23 eff_ewt AV 62 nvoEffEwt SNVT_-

temp_p(105)

Network Status of the Entering Water Tem- perature in F

Effect Leaving Wtr Temp R Input Register

(Float) 25 eff_lwt AV 11 nvoEffLwt SNVT_- temp_p(105)

Network Status of the Entering Water Tem- perature in F

Effect Outdoor Air Temp R Input Register

(Float) 27 eff_rat AV 75 nvoEffRat SNVT_- temp_p(105)

Network Status of the Return Air Temperature in F

ELW_SENS_FAIL R Discrete Input 38 elw_sen BV 72 Select

Network Parameter to set ELW sensor FAIL 0 = Hardwired Sensor (Default) 1 = BAS Sensor Value

Table 36 Integration Points List (cont)

PROTOCOL MAP MODBUS BACNET LONWORKS OPERATION

DISPLAY NAME READ/ WRITE

REGISTER TYPE

REGISTER NUMBER

REFERENCE NAME

OBJECT TYPE

OBJECT ID NV NAME SNVT DESCRIPTION

See legend on page 73.

69

Enabled Stages R Input Register (Float) 29 enabled_cl-

stages AV 68 Select Network Status of the number of Compressor Stages Enabled

Factory Test R/W Coil 14 fac_test_en- able BV 91000 Select Factory Reserved

Fan Mode Status R Input Register (Float) 31 fan_-

mode_status AV 51 Select

Network Status of the Fan Mode Selection 0 = Start / Stop Fan Operation 1 = Variable Frequency Drive Fan Operation

Fan Output Cmd R Discrete Input 39 fan_cmd BV 17 Select

Network Parameter to set Fan Output Cmd 0 = Hardwired Sensor (Default) 1 = BAS Sensor Value

Fan_mode R/W Holding Regis- ter (Float) 19 fan_mode AV 50 Select

Network Parameter to set Fan Mode of Opera- tion 1 = Standard Fan Con- figuration 2 = Variable Frequency Drive Configuration (VAV Default)

FILTER R Discrete Input 40 filter BV 40 Select Filter Status 0 = Normal 1 = Clean Filter

FRE R Discrete Input 41 frz_2st BV 8 Select

UPM Board 1 Freeze Alarm 0 = Normal 1 = Active Freeze Con- dition

FRE2 R Discrete Input 42 frz_4st BV 56 Select

UPM Board 2 Freeze Alarm 0 = Normal 1 = Active Freeze Con- dition

High Static Count Rst R/W Coil 23 rtn_sup_st-

c_ctr_rst BV 99 Select

Network Parameter to reset the high static alarm counter Momen- tary toggle ON/OFF to reset counter

HP1 R Discrete Input 43 hp1_2st BV 5 nvoHp1Al arm SNVT_switch(95)

UPM Board 1 High Pressure Alarm Status for Compressor 1 0 = Normal 1 = Active High Pres- sure 1 Alarm

HP2 R Discrete Input 44 hp2_2st BV 52 nvoHp2Al arm SNVT_switch(95)

UPM Board 2 High Pressure Alarm Status for Compressor 3 0 = Normal 1 = Active High Pres- sure 3 Alarm

HP3 R Discrete Input 45 hp3_3st BV 7 nvoHp3Al arm SNVT_switch(95)

UPM Board 1 High Pressure Alarm Status for Compressor 2 0 = Normal 1 = High Pressure 2 Alarm

HP4 R Discrete Input 46 hp4_4st BV 54 nvoHp4Al arm SNVT_switch(95)

UPM Board 2 High Pressure Alarm Status for Compressor 4 0 = Normal 1 = High Pressure 4 Alarm

INPUT_LOCK R Discrete Input 47 input_lock BV 38 Select

Network Parameter to set INPUT LOCK 0 = Hardwired Sensor (Default) 1 = BAS Sensor Value

Loop Enabled R/W Coil 9 loop_enabled BV 23 nviLoopEn a SNVT_switch(95)

Network Parameter to set Loop Enabled 0 = Hardwired Sensor (Default) 1 = BAS Sensor Value

LOW SP R Discrete Input 48 sta_- press_low BV 81 Select

Network Parameter to set LOW SP 0 = Single LOW Value 1 = Multiple LOW Val- ues (Default)

Table 36 Integration Points List (cont)

PROTOCOL MAP MODBUS BACNET LONWORKS OPERATION

DISPLAY NAME READ/ WRITE

REGISTER TYPE

REGISTER NUMBER

REFERENCE NAME

OBJECT TYPE

OBJECT ID NV NAME SNVT DESCRIPTION

See legend on page 73.

70

LP1 R Discrete Input 49 lp1_2st BV 4 nvoLp1Ala rm SNVT_switch(95)

UPM Board 1 Low Pres- sure Alarm Status for Compressor 1 0 = Normal 1 = LP1 Alarm Active

LP2 R Discrete Input 50 lp2_2st BV 53 nvoLp2Ala rm SNVT_switch(95)

UPM Board 2 Low Pres- sure Alarm Status for Compressor 3 0 = Normal 1 = LP3 Alarm Active

LP3 R Discrete Input 51 lp3_3st BV 6 nvoLp3Ala rm SNVT_switch(95)

UPM Board 1 Low Pres- sure Alarm Status for Compressor 2 0 = Normal 1 = LP2 Alarm Active

LP4 R Discrete Input 52 lp4_4st BV 55 nvoLp4Ala rm SNVT_switch(95)

UPM Board 2 Low Pres- sure Alarm Status for Compressor 4 0 = Normal 1 = LP4 Alarm Active

LVG_HI R Discrete Input 53 lvg_hi BV 32 Select

Leaving Water Tem- perature Alarm (High) 0 = Normal 1 = High LWT Alarm Active (Default: >135 F)

LVG_LO R Discrete Input 54 lvg_lo BV 33 Select

Leaving Water Tem- perature (LWT) Alarm (Low) 0 = Normal 1 = Low LWT Alarm Active (Default: <33 F)

LVG_SENS_FAIL R Discrete Input 55 lvg_sen BV 34 Select

Leaving Water Tem- perature Alarm (Sensor) 0 = Normal 1 = Sensor Failure (Check Sensor Hard- ware Configuration)

Mode Status R Input Register (Float) 33 mode_status AV 24

nvo- ModeSta-

tus

SNVT_count_inc( 9)

Unit Mode of Operation Selection Status 0 = Cooling only 5 = Cooling + Hot Gas Re-Heat

OAT Reset R/W Holding Regis- ter (Float) 21 oat_reset1 AV 80 nviO-

atReset1 SNVT_count_inc(

9)

Outside Air Tempera- ture (Free Cooling) Operation in F Default: 50 F

OAT Reset 2 R/W Holding Regis- ter (Float) 23 oat_reset2 AV 72 nviO-

atReset2 SNVT_count_inc(

9)

Outside Air Tempera- ture (Stage 1 Cooling) Operation in F Default: 60 F

OAT Reset 3 R/W Holding Regis- ter (Float) 25 oat_reset3 AV 74 nviO-

atReset3 SNVT_count_inc(

9)

Outside Air Tempera- ture (Stage 2 Cooling) Operation in F Default: 70 F

OAT Reset 4 R/W Holding Regis- ter (Float) 27 oat_reset4 AV 76 nviO-

atReset4 SNVT_count_inc(

9)

Outside Air Tempera- ture (Stage 3 Cooling) Operation in F Default: 78 F

OAT Reset 5 R/W Holding Regis- ter (Float) 29 oat_reset5 AV 79 nviO-

atReset5 SNVT_count_inc(

9)

Outside Air Tempera- ture (Stage 4 Cooling) Operation in F Default: 84 F

OAT Reset MA R/W Holding Regis- ter (Float) 31 oat_reset_ht AV 92 Select

Outside Air Mixed Air Temperature (Pre-Heat- ing) Operation in F Default: 40 F

Occupancy Status R Discrete Input 56 occ_status BV 21 nvoOc- cStatus SNVT_switch(95)

Network Parameter to set Occupancy Status 0 = Hardwired Sensor (Default) 1 = BAS Sensor Value

Outside Air Reset Mode Status R Input Register

(Float) 37 oat_rst_- mode_stat AV 89 Select

Return Air Temperature Reset Mode Status 0 = Single 1 = Multiple

Overload R Discrete Input 57 blwr_ovr- load_alm BV 75 Select

Network Alarm of Sup- ply Fan Motor Overload 0 = Normal 1 = Motor Overload Alarm

Table 36 Integration Points List (cont)

PROTOCOL MAP MODBUS BACNET LONWORKS OPERATION

DISPLAY NAME READ/ WRITE

REGISTER TYPE

REGISTER NUMBER

REFERENCE NAME

OBJECT TYPE

OBJECT ID NV NAME SNVT DESCRIPTION

See legend on page 73.

71

Overload Status R Discrete Input 58 blw_ovr- load_status BV 74 Select

Network Status of Sup- ply Fan Motor Overload 0 = Normal 1 = Motor Overload Alarm

Point Name R/W Holding Regis- ter (Float) 53 ao_two AV 92002 Select Factory Reserved

Point Name R/W Holding Regis- ter (Float) 55 ao_one AV 92001 Select Factory Reserved

Point Name R/W Coil 13 do_one BV 91001 Select Factory Reserved

Point Name R/W Coil 15 do_two BV 91002 Select Factory Reserved

Point Name R/W Coil 16 do_three BV 91003 Select Factory Reserved

Point Name R/W Coil 17 do_six BV 91006 Select Factory Reserved

Point Name R/W Coil 18 do_five BV 91005 Select Factory Reserved

Point Name R/W Coil 19 do_four BV 91004 Select Factory Reserved

Point Name R/W Coil 20 do_one_one BV 91007 Select Factory Reserved

Point Name R/W Coil 21 do_one_- three BV 91009 Select Factory Reserved

Point Name R/W Coil 22 do_one_two BV 91008 Select Factory Reserved

RA High Static R Discrete Input 76 raf_hi_stat- ic_alm BV 96 nvoRafHi-

StaticAl SNVT_switch(95)

Network Alarm indicat- ing return high return duct static 0 = Normal 1 = High Static Alarm

RA Static Press High Trip R/W Holding Regis-

ter (Float) 59 ra_sta_hi_trip AV 164 nviRaSta- HiTrip

SNVT_count_inc( 9)

Network Alarm indicat- ing status of high levels of static

RA Static Press Set point R/W Holding Regis-

ter (Float) 61 ra_sta_- press_stpt AV 165 nviRaSta-

PressStp SNVT_count_inc(

9)

Network Alarm indicat- ing status of press levels of static

RA_SENS_FAIL R Discrete Input 71 ras_sen BV 84 Select

Network Parameter to set RA SENSOR FAIL 0 = Hardwired Sensor (Default) 1 = BAS Sensor Value

RAS_HI R Discrete Input 72 ras_hi BV 83 Select

Network Parameter set RAS HI 0 = Hardwired Sensor (Default) 1 = BAS Sensor Value

RAT Reset Mode R/W Holding Regis- ter (Float) 33 rat_rst_mode AV 71 Select

Network Parameter to set Return Air Tempera- ture reset mode 0 = Single Reset Value 1 = Multiple Reset Val- ues (Default)

RAT Reset Selec- tion R/W Holding Regis-

ter (Float) 35 rat_sel AV 73 Select

Network Parameter to set Return Air Tempera- ture Selection 0 = Hardwired Sensor (Default) 1 = BAS Sensor Value

RAT Select R Input Register (Float) 35 rat_sel_sta AV 78 Select

Network Parameter to set Return Air Tempera- ture Select 0 = Single RAT Value 1 = Multiple RAT Val- ues (Default)

RAT SENS FAIL R Discrete Input 59 rat_sen BV 73 Select

Return Air Temperature Sensor Alarm 0 = Normal 1 = Sensor Failure (Check Sensor)

RAT_HI R Discrete Input 60 rat_hi BV 78 Select

Return Air Temperature Sensor Alarm 0 = Normal 1 = Sensor Value > 120F

Reset Fan Rntm R/W Coil 10 fan_rntm_rst BV 19 Select

Reset Fan Runtime. Momentary On/Off required. Toggled upon filter change.

Return Air Fan min speed R/W Holding Regis-

ter (Float) 63 raf_min_- speed AV 166 Select

Network Parameter to set Return Air Tempera- ture fan min speed 0 = Single min Value 1 = Multiple min Values (Default)

Table 36 Integration Points List (cont)

PROTOCOL MAP MODBUS BACNET LONWORKS OPERATION

DISPLAY NAME READ/ WRITE

REGISTER TYPE

REGISTER NUMBER

REFERENCE NAME

OBJECT TYPE

OBJECT ID NV NAME SNVT DESCRIPTION

See legend on page 73.

72

Return Fan Output Cmd R Discrete Input 73 rtn_fan_cmd BV 82 nvoRtn-

FanCmd SNVT_switch(95)

Network Parameter to set the return air fan minimum speed 40% (Factory Default)

Rev Valve Output Cmd R Discrete Input 61 rev_vlv_cmd BV 15 Select Network Status of the

Rev valve output

RF Overload R Discrete Input 74 rblwr_ovr- load_alm BV 86 Select

Network Alarm indicat- ing return fan motor overload trip 0 = Normal 1 = Overload Alarm

RF Overload Sta- tus R Discrete Input 75 rtn_blw_ovr-

load_status BV 98 Select

Network Status indicat- ing return fan motor overload trip 0 = Normal 1 = Overload Alarm

RH Sensor Sel R/W Holding Regis- ter (Float) 37 rh_sensor_-

sel AV 57 Select

Network Parameter to set RH sensor 0 = Single sensor Value 1 = Multiple sensor Val- ues (Default)

SA Static Press High Trip R/W Holding Regis-

ter (Float) 39 sa_sta_hi_tri p AV 54 Select

Network Parameter to set the high static pres- sure trip point Default 3.0 " of H2O

SA_CFG R Discrete Input 62 sa_config_er- ror BV 90 Select

Network Alarm indicat- ing Smoke detector con- figuration Error

SA_SENS_FAIL R Discrete Input 63 sas_sen BV 65 Select

Network Status Indicat- ing Supply Static Pres- sure Sensor Failure 0 = Normal 1 = Sensor Failed

SAS_HI R Discrete Input 64 sas_hi BV 64 nvoSasHi SNVT_switch(95)

Static Air Pressure Alarm (High) 0 = Normal 1 = High Static Pressure (Default: 3.0" H20)

Smk Det Alarm R Discrete Input 65 smoke BV 89 nvoSmoke SNVT_switch(95) Smoke Detector Alarm 0 = Normal 1 = Alarm

Smoke Detector Status R Discrete Input 66 smoke_sta-

tus BV 87 Select

Network Status of Smoke Detector 0 = Normal 1 = Smoke Alarm

Static Shutdown R Discrete Input 77 sa_stc_sht- dwn BV 16 Select

Network Alarm indicat- ing return high supply duct static 0 = Normal 1 = High Static Alarm

Static Press Set point R/W Holding Regis-

ter (Float) 41 sta_- press_stpt AV 52 nviSta-

PressStpt SNVT_-

press_p(113)

Network Parameter to set the Duct Static Pres- sure Set point in inches of H2O Setup

Static Pressure Shutdown R/W Holding Regis-

ter (Float) 43 st_press_trip AV 69 Select

Network Parameter to set Static Pressure Shutdown trip 0 = Single Pressure Value 1 = Multiple Pressure Values (Default)

Supply Air Tem- perature R Input Register

(Float) 39 eff_sat AV 10 nvoEffSA- Temp

SNVT_- temp_p(105)

Network Parameter to set Supply Air Tempera- ture 0 = Hardwired Sensor (Default) 1 = BAS Sensor Value

Supply Air Set Point Trip R/W Holding Regis-

ter (Float) 45 sat_hi_trip AV 63 Select

Network Parameter to set Supply Air Set point trip 0 = Single Set point Value 1 = Multiple Set point Values (Default)

Supply Air Set Point Differential R/W Holding Regis-

ter (Float) 47 sat_stpt_diff AV 65 Select

Network Parameter set Supply Air Set point dif- ferential 0 = Single Set point Value 1 = Multiple Set point Values (Default)

Table 36 Integration Points List (cont)

PROTOCOL MAP MODBUS BACNET LONWORKS OPERATION

DISPLAY NAME READ/ WRITE

REGISTER TYPE

REGISTER NUMBER

REFERENCE NAME

OBJECT TYPE

OBJECT ID NV NAME SNVT DESCRIPTION

See legend on page 73.

73

LEGEND

Supply Air Temp Set Point R Input Register

(Float) 41 sa_setpt AV 31 nviSAtStpt SNVT_- temp_p(105)

Network Parameter to set Supply Air Tempera- ture Set point 0 = Hardwired Sensor (Default) 1 = BAS Sensor Value

System Status R Input Register (Float) 43 sys_status AV 16 nvoSys-

Status SNVT_count_inc(

9)

General System Status 0 = Unoccupied 1 = Occupied 2 = Fan Only 4 = Cooling 5 = Transition to Cool 10 = Re-Heat

Unit_mode R/W Holding Regis- ter (Float) 49 unit_mode AV 23 Select

Network Parameter to configure Unit operating mode 0 = Cooling only 5 = Cooling + Hot Gas Re-Heat

UPM INPUT R Discrete Input 67 upm_input BV 39 Select

UPM Input Failure Alarm - Board 1 0 = UPM Connected 1 = UPM Connection Failure

UPM INPUT R Discrete Input 68 upm2_input BV 59 Select

UPM Input Failure Alarm - Board 1 0 = UPM Connected 1 = UPM Connection Failure

UPM Reset R/W Coil 11 upm_rst BV 25 Select UPM Board 1 Reset. Momentary On/Off required.

UPM Reset R/W Coil 12 upm2_rst BV 60 Select UPM Board 2 Reset. Momentary On/Off required.

ZN_CO2_fail R Discrete Input 69 zn_co2_fail BV 51 Select

CO2 Zone Sensor Alarm (Sensor) 0 = Normal 1 = Sensor Failure (Check Sensor Hard- ware)

ZN_CO2_HI R Discrete Input 70 zn_co2_hi BV 48 Select

CO2 Zone Sensor Alarm (High) 0 = Normal 1 = High CO2 Level (Default: >1995 PPM)

Zone Co2 High Trip R/W Holding Regis-

ter (Float) 51 zn_- co2_hi_trip AV 27 Select

Network Alarm indicat- ing status of high levels of CO2

Table 36 Integration Points List (cont)

PROTOCOL MAP MODBUS BACNET LONWORKS OPERATION

DISPLAY NAME READ/ WRITE

REGISTER TYPE

REGISTER NUMBER

REFERENCE NAME

OBJECT TYPE

OBJECT ID NV NAME SNVT DESCRIPTION

BAS Building Automaton System DAT Discharge Air Temperature LWT Leaving Water Temperature R Read UPM Unit Protection Module W Write

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500119-01 Printed in U.S.A. Form 50BV-5SI Pg 74 7-16 Replaces: 50BV-4SI

Carrier Corporation 2016 8733942606

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500119-01 Printed in U.S.A. Form 50BV-5SI Pg CL-1 7-16 Replaces: 50BV-4SI

START-UP CHECKLIST

(Fill out this form on Start-Up and file in job folder)

I. PRELIMINARY INFORMATION:

50BV UNIT: MODEL NO. ____________________ SERIAL NO. ____________________

START-UP DATE: ______________________________________

II. PRE-START-UP:

VERIFY ALL SHIPPING MATERIALS HAVE BEEN REMOVED FROM THE UNIT

IS THERE ANY SHIPPING DAMAGE? ________________ IF SO, WHERE ________________

_________________________________________________________

WILL THIS DAMAGE PREVENT UNIT START-UP? (Y/N) _______

CHECK POWER SUPPLY. DOES IT AGREE WITH UNIT? (Y/N) _______

HAS THE GROUND WIRE BEEN CONNECTED? (Y/N) _______

HAS THE CIRCUIT PROTECTION BEEN SIZED AND INSTALLED PROPERLY? (Y/N) _______

ARE THE POWER WIRES TO THE UNIT SIZED AND INSTALLED PROPERLY? (Y/N) _______

HAS THE CORRECT INPUT POWER PHASE SEQUENCE BEEN CONFIRMED WITH A METER? (Y/N) _______

HAS THE FAN AND MOTOR PULLEY BEEN CHECKED FOR PROPER ALIGNMENT AND DOES THE FAN BELT HAVE PROPER TENSION? (Y/N) _______

HAS WATER BEEN PLACED IN DRAIN PAN TO CONFIRM PROPER DRAINAGE? (Y/N) _______

ARE PROPER AIR FILTERS IN PLACE AND CLEAN? (Y/N) _______

VERIFY THAT THE UNIT IS INSTALLED WITHIN LEVELING TOLERANCES (Y/N) _______

CONTROLS

HAS THE DUCT STATIC PRESSURE PROBE BEEN INSTALLED? (Y/N) _______

HAVE CONTROL CONNECTIONS BEEN MADE AND CHECKED? (Y/N) _______

ARE ALL WIRING TERMINALS (including main power supply) TIGHT? (Y/N) _______

HAS AUTOMATIC RUN TEST BEEN COMPLETED? (Y/N) _______

HAS THE VFD CHECKOUT BEEN COMPLETED? (Y/N) _______

PIPING

HAVE LEAK CHECKS BEEN MADE AT COMPRESSOR, CONDENSER, EVAPORATOR, TXVs (Thermostatic Expansion Valves), SOLENOID VALVES, FILTER DRIERS, AND FUSIBLE PLUGS WITH A LEAK DETECTOR? (Y/N) _______

HAVE WATER AND STEAM VALVES BEEN OPENED (to fill piping and heat exchangers)? (Y/N) _______

HAS AIR PURGE BEEN PERFORMED? (Y/N) _______

NOTE: To avoid injury to personnel and damage to equipment or property when completing the procedures listed in this start-up checklist, use good judgment, follow safe practices, and adhere to the safety considerations/information as outlined in preced- ing sections of this Installation, Start-Up, Service and Controls Operation and Troubleshooting document.

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500119-01 Printed in U.S.A. Form 50BV-5SI Pg CL-2 7-16 Replaces: 50BV-4SI

Carrier Corporation 2016

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- --

- -

- -

- -

- -

- -

- -

- -

- -

- -

-

C U

T A

LO N

G D

O T

T E

D L

IN E

C U

T A

LO N

G D

O T

T E

D L

IN E

8733942606

ELECTRICAL

CHECK VOLTAGE IMBALANCE

LINE-TO-LINE VOLTS: AB V AC V BC V

(AB + AC + BC)/3 = AVERAGE VOLTAGE = V

MAXIMUM DEVIATION FROM AVERAGE VOLTAGE = V

VOLTAGE IMBALANCE = 100 X (MAX DEVIATION)/(AVERAGE VOLTAGE) = % (IF OVER 2% VOLT- AGE IMBALANCE, DO NOT ATTEMPT TO START SYSTEM; CALL LOCAL POWER COMPANY FOR ASSISTANCE.)

III. START-UP:

CHECK FAN SPEED AND RECORD.

AFTER AT LEAST 15 MINUTES RUNNING TIME, RECORD THE FOLLOWING MEASUREMENTS:

COMPRESSOR AMPS:

NOTES: _______________________________________________________________________________________

_______________________________________________________________________________________________

_______________________________________________________________________________________________

_______________________________________________________________________________________________

CIRCUIT 1 CIRCUIT 2 CIRCUIT 3 CIRCUIT 4

SUCTION PRESSURE

SATURATED SUCTION TEMP

SUCTION LINE TEMP

SUPERHEAT DEGREES

DISCHARGE PRESSURE

SATURATED CONDENSING

LIQUID LINE TEMP

SUBCOOLING DEGREES

LIQUID SIGHT GLASS (CLEAR/BUBBLES)

ENTERING CONDENSER-WATER TEMP

LEAVING CONDENSER-WATER TEMP

EVAP ENTERING-AIR DB (dry bulb) TEMP

EVAP ENTERING-AIR WB (wet bulb) TEMP

EVAP LEAVING-AIR DB TEMP

EVAP LEAVING-

Manualsnet FAQs

If you want to find out how the 50BVW Carrier works, you can view and download the Carrier 50BVW Installation Manual on the Manualsnet website.

Yes, we have the Installation Manual for Carrier 50BVW as well as other Carrier manuals. All you need to do is to use our search bar and find the user manual that you are looking for.

The Installation Manual should include all the details that are needed to use a Carrier 50BVW. Full manuals and user guide PDFs can be downloaded from Manualsnet.com.

The best way to navigate the Carrier 50BVW Installation Manual is by checking the Table of Contents at the top of the page where available. This allows you to navigate a manual by jumping to the section you are looking for.

This Carrier 50BVW Installation Manual consists of sections like Table of Contents, to name a few. For easier navigation, use the Table of Contents in the upper left corner.

You can download Carrier 50BVW Installation Manual free of charge simply by clicking the “download” button in the upper right corner of any manuals page. This feature allows you to download any manual in a couple of seconds and is generally in PDF format. You can also save a manual for later by adding it to your saved documents in the user profile.

To be able to print Carrier 50BVW Installation Manual, simply download the document to your computer. Once downloaded, open the PDF file and print the Carrier 50BVW Installation Manual as you would any other document. This can usually be achieved by clicking on “File” and then “Print” from the menu bar.