Carrier 48LC 14 26 Installation Instructions PDF

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53480310-01 Printed in U.S.A. Form 48LC-14-26-07SI Pg 1 1-2021 Replaces: 48LC-14-26-06SI

Installation Instructions NOTE: Read the entire instruction manual before starting the installation.

CONTENTS Page

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Rated Indoor Airflow (cfm) . . . . . . . . . . . . . . . . . . . . . 2 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Jobsite Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Step 1 Plan for Unit Location . . . . . . . . . . . . . . . 19 ROOF MOUNT Step 2 Plan for Sequence of Unit Installation . . 19 CURB-MOUNTED INSTALLATION PAD-MOUNTED INSTALLATION FRAME-MOUNTED INSTALLATION Step 3 Inspect Unit . . . . . . . . . . . . . . . . . . . . . . . . 19 Step 4 Provide Unit Support . . . . . . . . . . . . . . . . 19 ROOF CURB MOUNT SLAB MOUNT (HORIZONTAL UNITS ONLY) ALTERNATE UNIT SUPPORT (IN LIEU OF CURB OR

SLAB MOUNT) Step 5 Field Fabricate Ductwork . . . . . . . . . . . . . 23 Step 6 Rig and Place Unit . . . . . . . . . . . . . . . . . . 23 POSITIONING ON CURB Step 7 Horizontal Duct Connection . . . . . . . . . . 24 Step 8 Install Outside Air Hood Factory

Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Step 9 Assemble Barometric Hood . . . . . . . . . . . 26 BAROMETRIC HOOD (VERTICAL CONFIGURATION) BAROMETRIC HOOD (HORIZONTAL

CONFIGURATION) Step 10 Install Flue Hood and Combustion Air

Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Step 11 Install Gas Piping . . . . . . . . . . . . . . . . . . 28 GAS SUPPLY LINE FACTORY-OPTION THRU-BASE CONNECTIONS Step 12 Install External Condensate Trap and

Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Step 13 Make Electrical Connections . . . . . . . . . 30 FIELD POWER SUPPLY UNITS WITHOUT FACTORY-INSTALLED NON-

FUSED DISCONNECT OR HACR UNITS WITH FACTORY-INSTALLED NON-FUSED

DISCONNECT OR HACR ALL UNITS CONVENIENCE OUTLETS HACR FACTORY-OPTION THRU-BASE CONNECTIONS UNITS WITHOUT THRU-BASE CONNECTIONS FIELD CONTROL WIRING THERMOSTAT UNIT WITHOUT THRU-BASE CONNECTION KIT HEAT ANTICIPATOR SETTINGS

TRANSFORMER CONNECTION FOR 208-V POWER SUPPLY

RTU Open Controller (Factory-Installed Option) . .41 SystemVu Controller (Factory-Installed Option) . 42 Humidi-MiZer System Control Connections . . . . .42 HUMIDI-MIZER SYSTEM SPACE RH CONTROLLER Integrated Staging Control (ISC) Board . . . . . . . . . .43 ISC BOARD - SEQUENCE OF OPERATION EconoMi$er X (Factory Option) . . . . . . . . . . . . . . .46 SYSTEM COMPONENTS SPECIFICATIONS INPUTS OUTPUTS ENVIRONMENTAL ECONOMIZER MODULE WIRING DETAILS INTERFACE OVERVIEW SETUP AND CONFIGURATION ENTHALPY SETTINGS TWO-SPEED FAN OPERATION CHECKOUT TROUBLESHOOTING Staged Air Volume (SAV) with Variable Frequency

Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60 MULTI-SPEED VFD DISPLAY KIT (FIELD-

INSTALLED OPTION) CONNECTING THE KEYPAD TO THE VFD PROGRAM THE VFD FOR INDOOR FAN CONTROL Smoke Detectors . . . . . . . . . . . . . . . . . . . . . . . . . . . .74 RETURN AIR SENSOR TUBE INSTALLATION SMOKE DETECTOR TEST MAGNET ADDITIONAL APPLICATION DATA Step 14 Install Accessories . . . . . . . . . . . . . . . . .75 Step 15 Check Belt Tension . . . . . . . . . . . . . . . . .75 BELT FORCE DEFLECTION METHOD BELT TENSION METHOD START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . .CL-1

SAFETY CONSIDERATIONS Installation and servicing of air-conditioning equipment can be hazardous due to system pressure and electrical components. Only trained and qualified service personnel should install, repair, or service air-conditioning equipment. Untrained personnel can perform basic maintenance functions of cleaning coils and filters and replacing filters. All other operations should be performed by trained service personnel. When working on air-conditioning equipment, observe precautions in the literature, tags and labels attached to the unit, and other safety precautions that may apply. Follow all safety codes, including ANSI (American National Standards Institute) Z223.1. Wear safety glasses and work gloves. Use quenching cloth for unbrazing operations. Have fire extinguisher available for all brazing operations.

WeatherExpert 48LC 14-26 Single Package Rooftop

Gas Heat/Electric Cooling Unit with Puron (R-410A) Refrigerant

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It is important to recognize safety information. This is the safety- alert symbol . When you see this symbol on the unit and in instructions or manuals, be alert to the potential for personal injury. Understand the signal words DANGER, WARNING, CAUTION, and NOTE. These words are used with the safety-alert symbol. DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING signifies hazards which could result in personal injury or death. CAUTION is used to identify unsafe practices, which may result in minor personal injury or product and property damage. NOTE is used to highlight suggestions which will result in enhanced installation, reliability, or operation.

GENERAL For unit options, see Fig. 1. For unit dimensions, see Fig. 2-16. For unit operating weights, see Table 2.

Rated Indoor Airflow (cfm) Table 1 lists the rated indoor airflow used for the AHRI efficiency rating for the units covered in this document.

WARNING

FIRE, EXPLOSION HAZARD Failure to follow this warning could result in death, serious personal injury and/or property damage. Disconnect gas piping from unit when pressure testing at pressure greater than 0.5 psig (3450 Pa). Pressures greater than 0.5 psig will cause gas valve damage resulting in hazardous condition. If gas valve is subjected to pressure greater than 0.5 psig, it must be replaced before use. When pressure testing field-supplied gas piping at pressures of 0.5 psig or less, a unit connected to such piping must be isolated by closing the manual gas valve(s).

WARNING

CARBON-MONOXIDE POISONING HAZARD Failure to follow instructions could result in severe personal injury or death due to carbon-monoxide poisoning, if combus- tion products infiltrate into the building. Check that all openings in the outside wall around the vent (and air intake) pipe(s) are sealed to prevent infiltration of combustion products into the building. Check that furnace vent (and air intake) terminal(s) are not ob- structed in any way during all seasons.

AVERTISSEMENT

RISQUE DINTOXICATION AU MONOXYDE DE CARBONE Si ces directives ne sont pas suivies, cela peut entraner des blessures graves ou une intoxication au monoxyde de carbone pouvant causer la mort, si des produits de combustion sinfil- trent dans le btiment. Vrifier que toutes les ouvertures pratiques dans le mur ex- trieur autour du ou des tuyaux dvent (et de la prise dair) sont scelles de manire empcher linfiltration de produits de combustion dans le btiment. Veiller ce que la ou les sorties de lvent de lappareil de chauffage (et la prise dair) ne soient, en aucune faon, ob- strues, quelle que soit la saison.

DANGER

ELECTRICAL SHOCK HAZARD Failure to follow this warning will result in personal injury or death. Before performing service or maintenance operations on unit, turn off main power switch to unit and install lock(s) and lock- out tag(s). Ensure electrical service to rooftop unit agrees with voltage and amperage listed on the unit rating plate. Unit may have more than one power switch.

WARNING

PERSONAL INJURY AND ENVIRONMENTAL HAZARD Failure to follow this warning could cause personal injury or death. Relieve pressure and recover all refrigerant before system re- pair or final unit disposal. Wear safety glasses and gloves when handling refrigerants. Keep torches and other ignition sources away from refriger- ants and oils.

CAUTION

PERSONAL INJURY HAZARD Failure to follow this caution may result in personal injury. Sheet metal parts may have sharp edges or burrs. Use care and wear appropriate protective clothing, safety glasses and gloves when handling parts and servicing air conditioning equipment.

Table 1 Rated Indoor Airflow

MODEL NUMBER FULL LOAD AIRFLOW (CFM) 48LC**14 4375 48LC**17 4875 48LC**20 5690 48LC**24 6500 48LC**26 7500

Table 2 Operating Weights

48LC** UNIT LB (KG)

14 17 20 24 26 Base Unit 1853 (842.3) 2095 (952.3) 2201 (1000.7) 2347 (1067.0) 2492 (1132.6) Economizer 246 (112) 246 (112) 246 (112) 246 (112) 246 (112) Powered Outlet 35 (16) 35 (16) 35 (16) 35 (16) 35 (16) Curb 14-in. (356 mm) 240 (109) 240 (109) 255 (116) 255 (116) 273 (124) 24-in. (610 mm) 340 (154) 340 (154) 355 (161) 355 (161) 355 (161)

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Fig. 1 48LC**14-26 Model Number Nomenclature

4 8 L C D 0 2 4 A 1 A 5 - 0 A 0 A 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

Model Series - WeatherExpert

LC - Ultra High Efficiency

Unit Heat Type 48 - Gas Heat Packaged Rooftop

Cooling Tons 14 - 12.5 ton 17 - 15 ton 20 - 17.5 ton 24 - 20 ton 26 - 23 ton

Heat Options D = Low Gas Heat E = Medium Gas Heat F = High Gas Heat S = Low Heat w/ Stainless Steel Exchanger R = Medium Heat w/ Stainless Steel Exchanger T = High Heat w/ Stainless Steel Exchanger

Sensor Options A = None B = RA Smoke Detector C = SA Smoke Detector D = RA + SA Smoke Detector E = CO2

F = RA Smoke Detector and CO2

G = SA Smoke Detector and CO2

H = RA + SA Smoke Detector and CO2

Indoor Fan Motor Options 1 = Standard Static / Vertical Supply, Return Air Flow 2 = Medium Static / Vertical Supply, Return Air Flow 3 = High Static / Vertical Supply, Return Air Flow 4 = Ultra High Static / Vertical Supply, Return Air Flow 5 = Standard Static / Horizontal Supply, Return Air Flow 6 = Medium Static / Horizontal Supply, Return Air Flow 7 = High Static / Horizontal Supply, Return Air Flow 8 = Ultra High Static / Horizontal Supply, Return Air Flow

Refrig. Systems Options 0 = Three stage cooling capacity control with TXV A = Three stage cooling capacity control with TXV and Humidi-MiZer system

Coil Options: Fin/Tube (Condenser Evaporator Hail Guard) A = Al/Cu Al/Cu B = Precoat Al/Cu Al/Cu C = E-coat Al/Cu Al/Cu D = E-coat Al/Cu E-coat Al/Cu E = Cu/Cu Al/Cu F = Cu/Cu Cu/Cu M = Al/Cu Al/Cu Louvered Hail Guard N = Precoat Al/Cu Al/Cu Louvered Hail Guard P = E-coat Al/Cu Al/Cu Louvered Hail Guard Q = E-coat Al/Cu E-coat Al/Cu Louvered Hail Guard R = Cu/Cu Al/Cu Louvered Hail Guard S = Cu/Cu Cu/Cu Louvered Hail Guard

Voltage 1 = 575/3/60 5 = 208-230/3/60 6 = 460/3/60

Design Revision - = Factory Design Revision

Base Unit Controls 0 = Electro-mechanical Controls 1 = RTU Open Multi-Protocol Controller 4 = SystemVu Controller

Intake / Exhaust Options A = None B = Temperature Low Leak Economizer with Barometric Relief C = Temperature Low Leak Economizer with Centrifugal Power Exhaust - Vertical Only E = Enthalpy Low Leak Economizer with Barometric Relief F = Enthalpy Low Leak Economizer with Centrifugal Power Exhaust - Vertical Only N = Temperature Ultra Low Leak Economizer with Barometric Relief P = Temperature Ultra Low Leak Economizer with Centrifugal Power Exhaust - Vertical Only R = Enthalpy Ultra Low Leak Economizer with Barometric Relief S = Enthalpy Ultra Low Leak Economizer with Centrifugal Power Exhaust - Vertical Only

Service Options 0 = None 1 = Unpowered Convenience Outlet 2 = Powered Convenience Outlet 3 = Hinged Panels 4 = Hinged Panels and Unpowered Convenience Outlet 5 = Hinged Panels and Powered Convenience Outlet

Packaging 0 = Standard 1 = LTL

Electrical Options A = None B = HACR Circuit Breaker C = Non-Fused Disconnect

Example: Position:

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Fig. 2 48LC**14 Vertical Airflow

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Fig. 3 48LC**14 Horizontal Airflow

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Fig. 4 48LC**14 Back View and Condensate Drain Location

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Fig. 5 48LC**14 Corner Weights and Clearances

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Fig. 6 48LC**14 Bottom View

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Fig. 7 48LC**17-20 Vertical Airflow

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Fig. 8 48LC**17-20 Horizontal Airflow

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Fig. 9 48LC**17-20 Back View and Condensate Drain Location

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Fig. 10 48LC**17-20 Corner Weights and Clearances

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Fig. 11 48LC**17-20 Bottom View

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Fig. 12 48LC**24-26 Vertical Airflow

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Fig. 13 48LC**24-26 Horizontal Airflow

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Fig. 14 48LC**24-26 Back View and Condensate Drain Location

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Fig. 15 48LC**24-26 Corner Weights and Clearances

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Fig. 16 48LC**24-26 Bottom View

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INSTALLATION

Jobsite Survey Complete the following checks before installation. 1. Consult local building codes and the NEC (National Elec-

trical Code) ANSI/NFPA 70 for special installation requirements.

2. Determine unit location (from project plans) or select unit location.

3. Check for possible overhead obstructions which may inter- fere with unit lifting or rigging.

Step 1 Plan for Unit Location Select a location for the unit and its support system (curb or other) that provides for the minimum clearances required for safety. This includes the clearance to combustible surfaces, unit performance and service access below, around and above unit as specified in unit drawings. See Fig. 5, 10, and 15. NOTE: Consider also the effect of adjacent units. Be sure that the unit is installed such that snow will not block the combustion air intake or flue outlet. Unit may be installed directly on wood flooring or on Class A, B, or C roof-covering material when roof curb is used. Do not install unit in an indoor location. Do not locate air inlets near exhaust vents or other sources of contaminated air. For proper unit operation, adequate combustion and ventilation air must be provided in accordance with Section 5.3 (Air for Combustion and Ventilation) of the National Fuel Gas Code, ANSI Z223.1 (American National Standards Institute) and NFPA (National Fire Protection Association) 54 TIA-54-84-1. In Canada, installation must be in accordance with the CAN1-B149 installation codes for gas burning appliances. Although unit is weatherproof, avoid locations that permit water from higher level runoff and overhangs to fall onto the unit. Locate mechanical draft system flue assembly at least 4 ft (1.2 m) from any opening through which combustion products could enter the building, and at least 4 ft (1.2 m) from any adjacent building (or per local code). Locate the flue assembly at least 10 ft (3.05 m) from an adjacent units fresh air intake hood if within 3 ft (0.91 m) of same elevation (or per local code). When unit is located adja- cent to public walkways, flue assembly must be at least 7 ft (2.1 m) above grade. Select a unit mounting system that provides adequate height to al- low installation of condensate trap per requirements. Refer to Step 11 Install External Condensate Trap and Line for required trap dimensions. ROOF MOUNT Check building codes for weight distribution requirements. Unit operating weight is shown in Table 2.

Step 2 Plan for Sequence of Unit Installation The support method used for this unit will dictate different se- quences for the steps of unit installation. For example, on curb- mounted units, some accessories must be installed on the unit be- fore the unit is placed on the curb. Review the following for rec- ommended sequences for installation steps. CURB-MOUNTED INSTALLATION 1. Install curb 2. Install field-fabricated ductwork inside curb

3. Install thru-base service connection fittings (affects curb and unit)

4. Rig and place unit 5. Remove top skid 6. Install outside air hood 7. Install smoke detector tube 8. Install combustion air hood 9. Install flue hood 10. Install gas piping 11. Install condensate line trap and piping 12. Make electrical connections 13. Install other accessories

PAD-MOUNTED INSTALLATION 1. Prepare pad and unit supports 2. Rig and place unit 3. Remove duct covers and top skid 4. Install smoke detector return air sensor tube 5. Install field-fabricated ductwork at unit duct openings 6. Install outside air hood 7. Install combustion air hood 8. Install flue hood 9. Install gas piping 10. Install condensate line trap and piping 11. Make electrical connections 12. Install other accessories

FRAME-MOUNTED INSTALLATION Frame-mounted applications generally follow the sequence for a curb installation. Adapt as required to suit specific installation plan.

Step 3 Inspect Unit Inspect unit for transportation damage. File any claim with trans- portation agency. Confirm before installation of unit that voltage, amperage and cir- cuit protection requirements listed on unit data plate agree with power supply provided. On units with hinged panel option, check to be sure all latches are tight and in closed position. Locate the carton containing the outside air hood parts; see Fig. 21 and 24. Do not remove carton until unit has been rigged and locat- ed in final position.

Step 4 Provide Unit Support ROOF CURB MOUNT Accessory roof curb details and dimensions are shown in Fig. 17-19. Assemble and install accessory roof curb in accor- dance with instructions shipped with the curb. NOTE: The gasketing of the unit to the roof curb is critical for a watertight seal. Install gasket supplied with the roof curb as shown in Fig. 17-19. Improperly applied gasket can also result in air leaks and poor unit performance.

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Fig. 17 48LC**14 Roof Curb Details

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Fig. 18 48LC**17-20 Roof Curb Details

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Fig. 19 48LC**24-26 Roof Curb Details

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Curb should be level. This is necessary for unit drain to function properly. Unit leveling tolerances are shown in Fig. 20. Refer to Accessory Roof Curb Installation Instructions for additional infor- mation as required. Install insulation, cant strips, roofing felt, and counter flashing as shown. Ductwork must be attached to curb and not to the unit. Thru-the-base power connection must be installed before the unit is set on the roof curb. If field-installed thru-the-roof curb gas con- nections are desired, remove knockout in basepan located in the gas section; see Fig. 21 for location. Gas connections and power connections to the unit must be field-installed after the unit is in- stalled on the roof curb. If electric and control wiring is to be routed through the basepan, remove knockouts in basepan located in control box area of access panel; see Fig. 2-16 for basepan knockout locations. Attach the service connections to the basepan.

Fig. 20 Unit Leveling Tolerances

Fig. 21 Typical Access Panel and Compressor Locations

SLAB MOUNT (HORIZONTAL UNITS ONLY) Provide a level concrete slab that extends a minimum of 6-in. (150 mm) beyond unit cabinet. Install a gravel apron in front of condenser coil air inlet to prevent grass and foliage from obstruct- ing airflow. NOTE: Horizontal units may be installed on a roof curb if required.

ALTERNATE UNIT SUPPORT (IN LIEU OF CURB OR SLAB MOUNT) A non-combustible sleeper rail can be used in the unit curb sup- port area. If sleeper rails cannot be used, support the long sides of the unit with a minimum of 4 equally spaced 4-in. x 4-in. (102 mm x 102 mm) pads on each side. Locate pads so that they support the rails. Make sure to avoid the fork openings.

Step 5 Field Fabricate Ductwork Cabinet return-air static pressure (a negative condition) shall not exceed 0.5 in. wg (87 Pa) with economizer or without economizer. For vertical ducted applications, secure all ducts to roof curb and building structure. Do not connect ductwork to unit. Fabricate supply ductwork so that the cross sectional dimensions are equal to or greater than the unit supply duct opening dimen- sions for the first 18-in. (458 mm) of duct length from the unit basepan. Insulate and weatherproof all external ductwork, joints, and roof openings with counter flashing and mastic in accordance with ap- plicable codes. Ducts passing through unconditioned spaces must be insulated and covered with a vapor barrier. If a plenum return is used on a vertical unit, the return should be ducted through the roof deck to comply with applicable fire codes. A minimum clearance is not required around ductwork.

Step 6 Rig and Place Unit Keep unit upright and do not drop. Spreader bars are not re- quired if top crating is left on unit. Rollers may be used to move unit across a roof. Level by using unit frame as a reference. See Table 2 (on page 2) and Fig. 22 for additional information. Lifting holes are provided in base rails as shown in Fig. 22. Refer to rigging instructions on unit.

Before setting the unit onto the curb, recheck gasketing on curb.

A-B 0.25 (6)

B-C 0.5 (12)

A-C 0.5 (12)

MAXIMUM ALLOWABLE DIFFERENCE IN. (MM)

A

B

C

CONTROL BOX ACCESS PANEL

FILTER AND INDOOR COIL

ACCESS PANEL

INDOOR BLOWER ACCESS PANEL

GAS HEAT ACCESS PANEL COMPRESSOR

(EACH SIDE)

HOOD CARTON LOCATION (REAR ACCESS PANEL)

CAUTION

PROPERTY DAMAGE HAZARD Failure to follow this caution may result in damage to roofing materials. Membrane roofs can be cut by sharp sheet metal edges. Be careful when placing any sheet metal parts on such roof.

CAUTION

UNIT DAMAGE HAZARD Failure to follow this caution may result in equipment damage. All panels must be in place when rigging. Unit is not designed for handling by fork truck when packaging is removed. If using top crate as spreader bar, once unit is set, carefully lower wooden crate off building roof top to ground. Ensure that no people or obstructions are below prior to lowering the crate.

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Fig. 22 Rigging Details

POSITIONING ON CURB Position unit on roof curb so that the following clearances are maintained: 1/4-in. (6 mm) clearance between the roof curb and the base rail inside the right and left, 1/2-in. (12 mm) clearance be- tween the roof curb and the base rail inside the front and back. This will result in the distance between the roof curb and the base rail inside on the condenser end of the unit being approximately equal to Details A and B in Fig. 17-19. Do not attempt to slide unit on curb after unit is set. Doing so will result in damage to the roof curb seal. Although unit is weatherproof, guard against water from higher level runoff and overhangs. Flue vent discharge must have a minimum horizontal clearance of 48-in. (1220 mm) from electric and gas meters, gas regulators, and gas relief equipment. Minimum distance between unit and other electrically live parts is 48 in. (1220 mm). Flue gas can deteriorate building materials. Orient unit such that flue gas will not affect building materials. Locate mechanical draft system flue assembly at least 48-in. (1220 mm) from an adjacent building or combustible material. After unit is in position, remove rigging skids and shipping materials.

Step 7 Horizontal Duct Connection Refer to Fig. 3, 8, and 13 for locations and sizes of the horizontal duct connections. Note that there are two different return air duct connection locations one for unit without an economizer (on back side of unit) and a different one for unit equipped with an economizer (on left end, under the economizer hood). The supply air duct connection is on the back side. See Fig. 23 for top view depicting typical horizontal duct arrangements. Field-supplied (3/4-in.) flanges should be attached to horizontal duct openings (see Fig. 23) and all ductwork should be secured to the flanges. Insulate and weatherproof all external ductwork, joints, and roof or building openings with counter flashing and mastic in accordance with applicable codes.

NOTE: 48LC size 17 to 26 units are factory assembled as either dedicated horizontal or vertical units. These units cannot be field converted.

Fig. 23 Horizontal Duct Opening Dimensions

B

C

A

(914-1371) 36"-54"

DETAIL A

SEE DETAIL A

PLACE ALL SEAL STRIPS IN PLACE BEFORE PLACING UNIT ON ROOF CURB.

DUCT END

NOTES: 1. Dimensions in ( ) are millimeters. 2. Hook rigging shackles through holes in base rail, as shown in detail A. Holes in base rails are centered around the unit center of grav-

ity. Use wooden top to prevent rigging straps from damaging unit.

UNIT MAX WEIGHT

DIMENSIONS A B C

lb kg in. mm in. mm in. mm 48LC**14 2135 970 127.8 3249 59.1 1501 52.3 1328 48LC**17 2377 1080 141.5 3595 65.5 1664 60.3 1532 48LC**20 2483 1129 141.5 3595 65.5 1664 60.3 1532 48LC**24 2629 1195 157.8 4007 72.8 1849 60.3 1532 48LC**26 2774 1261 157.8 4007 72.8 1849 60.3 1532

RETURN AIR DUCT WITH

ECONOMIZER

RETURN AIR DUCT

WITHOUT ECONOMIZER

HORIZONTAL SUPPLY AIR

SUPPLY RETURN WITHOUT

ECONOMIZER

RETURN WITH

ECONOMIZER Location Back Back Left end Height

in. (mm) 157/8 (402) 493/8 (1253) 183/8 (467)

Width in. (mm) 293/4 (756) 233/8 (593) 615/8 (1564)

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Step 8 Install Outside Air Hood Factory Option The outside air hood for factory-option economizer is shipped in knock-down form and requires field assembly. The panel for the hood top is shipped on the end of the unit (see Fig. 24). The re- maining parts for the hood assembly (including side panels, filters and tracks) are shipped in a carton that is secured to the rear of the blower assembly. Access the carton location through rear panel (see Fig. 25). To remove the hood parts package: 1. Remove the back blower access panel. 2. Locate and cut the strap, being careful to not damage any

wiring. 3. Carefully lift the hood package carton through the back

blower access opening.

Fig. 24 Hood Top Shipping Position

Fig. 25 Hood Package Shipping Location

To assemble the outside air hood (see Fig. 26 for hood compo- nent locations): 1. Remove hood top panel from shipping position on unit end. 2. Install filters supports (Item #1) to the upper end panel using

the screws provided. 3. Install each deflector (Item #8) on to each filter support (Item

#1) using the screws provided. 4. Apply seal strip to mating flanges on side plates of hood

(Items #4 and #5). 5. Secure side panels (Items #4 and #5) to upper panel using the

screws provided. 6. Apply seal strip to mating flange of the hood (see Fig. 26). 7. Secure hood top (Item #3) to upper panel using the screws

provided. (On 44-in. chassis, remove the screws from across top cover of unit. The rear flange of hood top will slide behind unit top over flange.)

8. Secure side retainers (Item #6) to side panels (Items #4 and #5) using the screws provided, screwing from outside of the hood.

9. Secure each central retainer (Item #2) to the hood top (Item #3). Then align central retainers to holes located on fil- ter support (Item #1), so central retainer is perpendicular to hood and each filter support. Secure using screws provided.

10. Apply seal strip to top diverters (Item #7). 11. Secure top diverters (Item #7) to hood top (Item #3). 12. Install outdoor air screens by sliding them into each of the

four spaces created by the hood, filter support and central retainers. To do so, first insert the air screens into pocket cre- ated at the end of hood (Item #3), then fully put the air screen into place, and then slide them back into pocket created in the filter support (Item #1). Repeat this for each air screen (see Fig. 27). See Fig. 28 for completed hood assembly.

Fig. 26 Hood Part Identification and Seal Strip Application Areas

Fig. 27 Outdoor Air Screen Installation

HOOD TOP SHIPPING POSITION

HOOD PACKAGE

APPLY SEAL STRIP TO THE FRONT OF THIS FLANGE

APPLY SEAL STRIP TO THE BACK OF THIS FLANGE

APPLY SEAL STRIP TO THE BACK OF THIS FLANGE APPLY SEAL STRIP

TO THE BACK OF THIS FLANGE7

7 3

5 6 8 8

2 8

6

4

2

12

ITEM # DESCRIPTION QTY 1 Filter Supports 3 2 Central Retainer 3 3 Hood Top 1 4 Left Hood Side 1 5 Right Hood Side 1 6 Side Retainer 2 7 Top Diverters 2 8 Deflector 3

1. INSERT AIR SCREEN

2. SLIDE INTO POSITION

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Fig. 28 Completed Hood Assembly

Step 9 Assemble Barometric Hood The barometric hood can be assembled in vertical or horizontal configuration. Figure 29 illustrates the barometric hood parts.

Fig. 29 Barometric Hood Parts

BAROMETRIC HOOD (VERTICAL CONFIGURATION) 1. Remove the hood top panel from its shipping position on the

unit end (see Fig. 30).

Fig. 30 Shipping Location, Vertical Units

2. Remove the side panels located in the hood parts box (see Fig. 31).

Fig. 31 Barometric Hood Box Parts Location

3. Install parts as shown in the following exploded view (Fig. 32) using the seal strip and screws provided in the parts box.

Fig. 32 Barometric Hood Exploded View

Figure 33 illustrates the installed barometric hood parts.

Fig. 33 Installed Barometric Hood Side View and Isometric View

BAROMETRIC HOOD (HORIZONTAL CONFIGURATION) For horizontal return and field installed economizer, install the economizer as follows:

1. Install the field provided horizontal ductwork onto the unit. Duct height must be at least 19 1/2 inches high, however the duct can be no taller than the top of the relief opening in the bottom panel, or airflow into the outside air hood will be restricted. See Fig. 34.

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Fig. 34 Relief Damper

2. Cut a 16 in. x 36 in. opening in the return duct for the relief damper (see Fig. 34).

3. On the field installed economizer (CRECOMZR0**A00), a birdscreen or hardware cloth is shipped attached to the bot- tom panel used for vertical applications.

NOTE: This panel is not used for horizontal return applications. Remove the screen from the provided panel and install it over the relief opening cut in return duct. 4. Using the blade brackets, install the relief damper onto the

side of the return duct (see Fig. 35). The two brackets and relief damper are provided with the economizer.

Fig. 35 Installing CRBARHOD001A00 Over Relief Damper

5. Using the provided hardware, screw the CRBARHOD001A00 hood sides and top together (see Fig. 36).

Fig. 36 CRBARHOD001A00 Hood Sides and Top

Caulk the backside of the mating flanges to ensure a watertight seal. Install the CRBARHOD001A00 over the relief damper and screw to the return duct, as illustrated in Fig. 35.

Step 10 Install Flue Hood and Combustion Air Hood The flue hood is shipped screwed to the fan deck inside the burner compartment. Remove the burner access panel and then remove the flue hood from its shipping location. Using the screws provid- ed, install flue hood in the location shown in Fig. 37. The combustion air hood is attached to the back of the burner ac- cess panel. Remove the two screws securing the hood to the back of the burner access panel. Using the two screws, re-attach the hood to the front of the burner access panel as shown in Fig. 37.

Fig. 37 Flue Hood and Combustion Air Hood Details

FLUE HOOD COMBUSTION

AIR HOOD

28

Step 11 Install Gas Piping Installation of the gas piping must be in accordance with local building codes and with applicable national codes. In U.S.A., refer to NFPA 54/ANSI Z223.1 National Fuel Gas Code (NFGC). In Canada, installation must be accordance with the CAN/CSA B149.1 and CAN/CSA B149.2 installation codes for gas burning appliances. This unit is factory equipped for use with natural gas (NG) fuel at elevations up to 2000 ft (610 m) above sea level. Unit may be field converted for operation at elevations above 2000 ft (610 m) and/or for use with liquefied petroleum (LP) fuel. See accessory kit in- stallation instructions regarding these accessories. NOTE: Furnace gas input rate on rating plate is for installation up to 2000 ft (610 m) above sea level. In U.S.A. the input rating for altitudes above 2000 ft (610 m) must be derated by 4% for each 1000 ft (305 m) above sea level. For natural gas applications, gas pressure at unit gas connection must not be less than 5 in. wg (1246 Pa) or greater than 13 in. wg (3240 Pa) while the unit is operating (see Table 3). For liquified petroleum applications, the gas pressure must not be less than 11 in. wg (2740 Pa) or greater than 13 in. wg (3240 Pa) at the unit connection (see Table 4).

Manifold pressure is factory-adjusted for natural gas (NG) fuel use. Adjust as required to obtain best flame characteristics (see Table 5). Manifold pressure for liquid propane (LP) fuel must be adjusted to specified range (see Table 6). Follow instructions in the accessory kit to make initial readjustment.

Install a gas supply line that runs to the unit heating section. Refer to the NFPA 54/NFGC or equivalent code for gas pipe sizing data. Do not use a pipe smaller than the size specified. Size the gas sup- ply line to allow for a maximum pressure drop of 0.5 in. wg (124 Pa) between gas regulator source and unit gas valve connec- tion when unit is operating at high-fire flow rate. The gas supply line can approach the unit in two ways: horizontal- ly from outside the unit (across the roof), or through unit basepan. Observe clearance to gas line components per Fig. 38.

Fig. 38 Gas Piping Guide

GAS SUPPLY LINE The gas supply pipe enters the unit adjacent to the burner access panel on the front side of the unit, through the grommeted hole. The gas connection to the unit is made to the 3/4-in. FPT gas inlet port on the unit gas valve. Table 7 lists typical 3/4-in. NPT (National Pipe Thread) field sup- plied pipe fittings required for Thru-Base gas supply, starting from the unit gas valve (see Fig. 39). Pipe gas supply into 90 degree elbow Item 15 (see Table 7) through the hole in the unit basepan. For typical 3/4-in. NPT field supplied fittings required for NON Thru-Base gas supply starting from the unit gas valve, omit Items 14 and 15 from Table 7 and pipe gas supply into TEE. See Fig. 40.

* NIBCO is a registered trademark of NIBCO Inc.

Table 3 Natural Gas Supply Line Pressure Ranges

UNIT MODEL UNIT SIZE MIN MAX

48LC** 14, 17, 20, 24, 26 5.0 in. wg (1246 Pa)

13.0 in. wg (3240 Pa)

Table 4 Liquid Propane Supply Line Pressure Ranges

UNIT MODEL UNIT SIZE MIN MAX

48LC** 14, 17, 20, 24, 26 11.0 in. wg (2740 Pa)

13.0 in. wg (3240 Pa)

Table 5 Natural Gas Manifold Pressure Ranges

UNIT MODEL UNIT SIZE HIGH FIRE LOW FIRE

48LC** 14, 17, 20, 24, 26 3.0 in. wg (747 Pa)

2.0 in. wg (498 Pa)

Table 6 Liquid Propane Manifold Pressure Ranges

UNIT MODEL UNIT SIZE HIGH FIRE LOW FIRE

48LC** 14, 17, 20, 24, 26 11.0 in. wg (2740 Pa)

7.3 in. wg (1818 Pa)

48LCS* 14 only 9.8 in. wg (2441 Pa)

6.5 in. wg (1619 Pa)

CAUTION

EQUIPMENT DAMAGE Failure to follow this caution may result in equipment damage. When connecting the gas line to the unit gas valve, the installer MUST use a backup wrench to prevent damage to the valve.

Table 7 Typical 3/4-in. NPT Field-Supplied Piping Parts

ITEM QTY DESCRIPTION 1 1 90 degree Street Elbow 2 1 5-in. Long Nipple 3 1 Ground-Joint Union 4 1 3-in. Long Nipple 5 1 90 degree Elbow 6 1 12-in. Long Nipple 7 1 90 degree Elbow 8 1 3-in. Long Nipple 9 1 TEE

10 1 4-in. Long Nipple (Sediment Trap) 11 1 Cap 12 1 31/2-in. Long Nipple 13 1 NIBCO* Ball Valve (GB30) 14 1 8-in. Long Nipple 15 1 90 degree Elbow

LEGEND

*Field supplied. NOTE: Follow all local codes.

NFGC National Fuel Gas Code

STEEL PIPE NOMINAL DIAMETER

(in.)

SPACING OF SUPPORTS X DIMENSION

(ft) 1/2

3/4 or 1 11/4 or larger

6 8

10

X

BASE UNIT

BASE RAIL ROOF CURB

9 MINIMUM CLEARANCE FOR PANEL REMOVAL

MANUAL GAS SHUTOFF VALVE*

GAS REGULATOR*

48 MINIMUM

DRIP LEG PER NFGC*

FIELD- FABRICATED SUPPORT*

FROM GAS METER

29

Fig. 39 Gas Supply Line Piping with Thru-Base

Fig. 40 Gas Supply Line Piping

FACTORY-OPTION THRU-BASE CONNECTIONS Electrical Connections Knockouts are located in the control box area. Remove the appro- priate size knockout for high voltage connection. Use the field supplied connector depending on wiring or conduit being utilized. Remove the 7/8-in. (22 mm) knockout and appropriate connector for low voltage wiring. If non-unit powered convenience outlet is being utilized, remove the 7/8-in. (22 mm) knockout and utilize ap- propriate connector for 115 volt line. See Step 12 Make Electri- cal Connections for details. Gas Connections Remove the knockout in the base pan and route 3/4-in. gas line up through the opening. Install an elbow and route gas line through opening in panel after first removing plastic bushing. Install a gas shut off followed by a drip leg and ground-joint union. Route gas line into gas section through the grommet (Part #: KA56SL112) at the gas inlet and into the gas valve. See Fig. 39 and Table 7. If a regulator is installed, it must be located 4 feet (1.22 meters) from the flue outlet.

Some municipal codes require that the manual shutoff valve be lo- cated upstream of the sediment trap. See Fig. 40 for typical piping arrangements for gas piping that has been routed through the side- wall of the base pan. When installing the gas supply line, observe local codes pertaining to gas pipe installations. Refer to the NFPA 54/ANSI Z223.1 NFGC latest edition (in Canada, CAN/CSA B149.1). In the ab- sence of local building codes, adhere to the following pertinent recommendations: 1. Avoid low spots in long runs of pipe. Grade all pipe 1/4-in. in

every 15 ft (7 mm in every 5 m) to prevent traps. Grade all horizontal runs downward to risers. Use risers to connect to heating section and to meter.

2. Protect all segments of piping system against physical and thermal damage. Support all piping with appropriate straps, hangers, etc. Use a minimum of one hanger every 6 ft (1.8 m). For pipe sizes larger than 1/2-in., follow recommen- dations of national codes.

3. Apply joint compound (pipe dope) sparingly and only to male threads of joint when making pipe connections. Use only pipe dope that is resistant to action of liquefied petro- leum gases as specified by local and/or national codes. If using PTFE (Teflon1) tape, ensure the material is Double Density type and is labeled for use on gas lines. Apply tape per manufacturers instructions.

4. Pressure-test all gas piping in accordance with local and national plumbing and gas codes before connecting piping to unit.

NOTE: Pressure test the gas supply system after the gas supply piping is connected to the gas valve. The supply piping must be disconnected from the gas valve during the testing of the piping systems when test pressure is in excess of 0.5 psig (3450 Pa). Pres- sure test the gas supply piping system at pressures equal to or less than 0.5 psig (3450 Pa). The unit heating section must be isolated from the gas piping system by closing the external main manual shutoff valve and slightly opening the ground-joint union. Check for gas leaks at the field-installed and factory-installed gas lines after all piping connections have been completed. Use soap-and-water solution (or method specified by local codes and/or regulations).

NOTE: If orifice hole appears damaged or it is suspected to have been redrilled, check orifice hole with a numbered drill bit of cor- rect size. Never redrill an orifice. A burr-free and squarely aligned orifice hole is essential for proper flame characteristics. See Fig. 41.

15

14 13

12 11

10

9

8

7

6 5 4 3 2

1

13

12

11

10

9

8

7

6 5 4 3 2

1

1. Teflon is a registered trademark of DuPont.

WARNING

Failure to follow this warning could result in personal injury, death and/or property damage. Connect gas pipe to unit using a backup wrench to

avoid damaging gas controls. Never purge a gas line into a combustion chamber. Never test for gas leaks with an open flame. Use a

commercially available soap solution made specifically for the detection of leaks to check all connections.

Use proper length of pipe to avoid stress on gas control manifold.

30

Fig. 41 Orifice Hole

Step 12 Install External Condensate Trap and Line The unit has one 3/4-in. condensate drain connection on the end of the condensate pan (see Fig. 42). See Fig. 4, 9, and 14 for the loca- tion of the condensate drain connection. The piping for the condensate drain and external trap can be com- pleted after the unit is in place. Hand tighten fittings to the drain pan fitting. Provide adequate support for the drain line. Failure to do so can result in damage to the drain pan. See Fig. 43. All units must have an external trap for condensate drainage. Install a trap at least 4-in. (102 mm) deep and protect against freeze-up. If drain line is installed downstream from the external trap, pitch the line away from the unit at 1-in. per 10 ft (25 mm in 3 m) of run. Do not use a pipe size smaller than the unit connection (3/4-in.).

Fig. 42 Condensate Drain Pan Connection

Fig. 43 Condensate Drain Piping Details

Step 13 Make Electrical Connections

NOTE: Field-supplied wiring shall conform with the limitations of minimum 63F (33C) rise. FIELD POWER SUPPLY If equipped with optional powered convenience outlet: the power source leads to the convenience outlets transformer primary are not factory connected. Installer must connect these leads accord- ing to required operation of the convenience outlet. If an always- energized convenience outlet operation is desired, connect the source leads to the line side of the unit-mounted disconnect. (Check with local codes to ensure this method is acceptable in your area.) If a de-energize via unit disconnect switch operation of the convenience outlet is desired, connect the source leads to the load side of the unit disconnect. On a unit without a unit-mounted disconnect or HACR, connect the source leads to the terminal block with unit field power leads. See Fig. 44.

BURNER ORIFICE

CONDENSATE DRAIN CONNECTION

WARNING

Failure to follow this warning could result in personal injury or death. Do not use gas piping as an electrical ground. Unit cabinet must have an uninterrupted, unbroken electrical ground to minimize the possibility of personal injury if an electrical fault should occur. This ground may consist of elec- trical wire connected to unit ground lug in control compart- ment, or conduit approved for electrical ground when installed in accordance with NEC (National Electrical Code); ANSI/ NFPA 70, latest edition (in Canada, Canadian Electrical Code CSA [Canadian Standards Association] C22.1), and local elec- trical codes.

NOTE: Trap should be deep enough to offset maximum unit static difference. A 4-in. (102 mm) trap is recommended.

MINIMUM PITCH 1 (25 mm) PER 10 (3 m) OF LINE

BASE RAIL

OPEN VENT

TO ROOF DRAIN

DRAIN PLUG

ROOF CURB

SEE NOTE

3 (76 mm) MIN

31

Fig. 44 Location of TB1

Field power wires are connected to the unit at line-side pressure lugs on the terminal block (see wiring diagram label for control box component arrangement) or at factory-installed option non- fused disconnect switch or HACR breaker. Use copper conductors only. See Fig. 45.

NOTE: Make field power connections directly to line connection pressure lugs only. See Fig. 46-50 for wiring diagrams.

Fig. 45 Disconnect Switch and Unit

LOAD SIDE

SEE DETAIL A

DETAIL A

LINE SIDE

BLK YEL

BLU

CONTROL BOX

L3 L2

L1

WARNING

FIRE HAZARD Failure to follow this warning could result in personal injury, death, or property damage. Do not connect aluminum wire between disconnect switch and unit. Use only copper wire.

COPPER

WIRE ONLY

ELECTRIC DISCONNECT

SWITCH

ALUMINUM WIRE

32

Fig. 46 48LC**14-26 Electro-mechanical Control Wiring Diagram

33

Fig. 47 48LC**14-26 RTU Open Control Wiring Diagram

34

Fig. 48 48LC**14-26 SystemVu Control Wiring Diagram

35

Fig. 49 48LC Typical Power Wiring Diagram, Electro-mechanical and RTU Open Controls, (Sizes 14-20 208/230v Shown)

36

Fig. 50 48LC Typical Power Wiring Diagram, SystemVu Controls (Size 26 208/230V Shown)

37

UNITS WITHOUT FACTORY-INSTALLED NON-FUSED DISCONNECT OR HACR When installing units, provide a disconnect switch per NEC (National Electrical Code) of adequate size. Disconnect sizing data is provided on the unit informative plate. Locate on unit cabinet or within sight of the unit per national or local codes. Do not cover unit informative plate if mounting the disconnect on the unit cabinet. UNITS WITH FACTORY-INSTALLED NON-FUSED DIS- CONNECT OR HACR The factory-installed option non-fused disconnect switch (NFD) or HACR is located in the main control box. The manual switch handle and shaft are shipped in the control box and must be mounted on the corner post adjacent to the control box (see Fig. 51 or 52). Note that the tape covering the hole for the shaft in the cor- ner post must be removed prior to handle and shaft installation. To field install the NFD shaft and handle: 1. Open the control box panel. 2. Make sure the NFD shipped from the factory is at OFF posi-

tion (the arrow on the black handle knob or on the silver metal collar is at OFF).

3. Insert the shaft with the cross pin on the top of the shaft in the horizontal position.

4. Measure the tip of the shaft to the outside surface of the cor- ner post to be 0.88-in.

5. Tighten the locking screw to secure the shaft to the NFD. 6. Turn the handle to OFF position with red arrow pointing at

OFF. 7. Install the handle on to the corner post vertically with the red

arrow pointing up. 8. Secure the handle to the corner post with (2) screws and lock

washers supplied. To field install the HACR shaft and handle: 1. Open the control box panel. 2. Make sure the HACR shipped from the factory is at OFF

position (the white arrow pointing at OFF). 3. Insert the shaft with the cross pin on the top of the shaft in the

horizontal position. 4. Measure the tip of the shaft to the outside surface of the cor-

ner post to be 0.88-in. 5. Tighten the locking screw to secure the shaft to the HACR. 6. Turn the handle to OFF position with red arrow pointing at

OFF. 7. Install the handle on to the corner post vertically with the red

arrow pointing up. 8. Secure the handle to the corner post with (2) screws and lock

washers supplied.

Fig. 51 Handle and Shaft Assembly for NFD

Fig. 52 Handle and Shaft Assembly for HACR

38

ALL UNITS All field wiring must comply with NEC and all local code requirements. Size wire based on MCA (Minimum Circuit Amps) on the unit in- formative plate. See Fig. 53 for power wiring connections to the unit power terminal block and equipment ground. Maximum wire size is 2/0 AWG per pole.

Fig. 53 Power Wiring Connections

Provide a ground-fault and short-circuit over-current protection device (fuse or breaker) per NEC Article 440 (or local codes). Re- fer to unit informative data plate for MOCP (Maximum Over-cur- rent Protection) device size. NOTE: Units ordered with factory-installed HACR do not need additional ground-fault and short circuit over current protection device unless required by local codes.

Voltage to compressor terminals during operation must be within voltage range indicated on unit nameplate. On 3-phase units, volt- ages between phases must be balanced within 2% and the current within 10%. Use the formula shown below to determine the per- cent of voltage imbalance.

Example: Supply voltage is 230-3-60

Determine maximum deviation from average voltage. (AB) 227-224 = 3 v (BC) 231-227 = 4 v (AC) 227-226 = 1 v Maximum deviation is 4 v. Determine percent of voltage imbalance.

This amount of phase imbalance is satisfactory as it is below the maxi- mum allowable 2%.

11 13

L1 L2 L3 Ground (GR)

TB1

208/230-3-60 460-3-60 575-3-60

T1 T2 T3

L1 L2 L3

L1 L2 L3

Factory Wiring

Disconnect per NEC

Optional Disconnect

Switch or HACR

12 Equip GR Lug

Ground (GR)

Equip GR Lug

Units Without Disconnect or HACR Option

Units With Disconnect or HACR Option

% Voltage Imbalance = 100 x

max voltage deviation from average voltage average voltage

AB = 224 v BC = 231 v AC = 226 v

Average Voltage = (224 + 231 + 226)

= 681

= 227 3 3

% Voltage Imbalance = 100x 4

= 1.78% 227

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

CAUTION

UNIT DAMAGE HAZARD Failure to follow this caution may result in equipment damage. Operation on improper line voltage or excessive phase imbal- ance constitutes abuse and may cause damage to electrical components. Such operation would invalidate any applicable Carrier warranty.

A B C

MOTOR

39

CONVENIENCE OUTLETS

Two types of convenience outlets are offered on 48LC models: non-unit powered and unit-powered. Both types provide a 125-v GFCI (ground-fault circuit-interrupter) duplex receptacle rated at 15-A behind a hinged access cover, located on the corner panel of the unit. See Fig. 54.

Fig. 54 Convenience Outlet Location

Installing Weatherproof Cover A weatherproof while-in-use cover for the factory-installed conve- nience outlets is now required by UL standards. This cover cannot be factory-mounted due to its depth; it must be installed at unit in- stallation. For shipment, the convenience outlet is covered with a blank cover plate. The weatherproof cover kit is shipped in the units control box. The kit includes the hinged cover, a backing plate and gasket. DISCONNECT ALL POWER TO UNIT AND CONVE- NIENCE OUTLET. LOCK-OUT AND TAG-OUT ALL POWER. Remove the blank cover plate at the convenience outlet; discard the blank cover. Loosen the two screws at the GFCI duplex outlet, until approxi- mately 1/2-in. (13 mm) under screw heads is exposed. Press the gasket over the screw heads. Slip the backing plate over the screw heads at the keyhole slots and align with the gasket; tighten the two screws until snug (do not over-tighten).

Mount the weatherproof cover to the backing plate as shown in Fig. 55. Remove two slot fillers in the bottom of the cover to per- mit service tool cords to exit the cover. Check for full closing and latching.

Fig. 55 Weatherproof Cover Installation

Non-unit powered type This type requires the field installation of a general-purpose 125-v 15-A circuit powered from a source elsewhere in the building. Ob- serve national and local codes when selecting wire size, fuse or breaker requirements and disconnect switch size and location. Route 125-v power supply conductors into the bottom of the utili- ty box containing the duplex receptacle. Unit-powered type A unit-mounted transformer is factory-installed to stepdown the main power supply voltage to the unit to 115-v at the duplex re- ceptacle. This option also includes a manual switch with fuse, lo- cated in a control box and mounted on a bracket behind the conve- nience outlet; access is through the units control box access panel. See Fig. 54. The primary leads to the convenience outlet transformer are not factory-connected. If local codes permit, the transformer primary leads can be connected at the line-side terminals on the unit- mounted non-fused disconnect switch; this will provide service power to the unit when the unit disconnect switch is open. See Fig. 56. Test the GFCI receptacle by pressing the TEST button on the face of the receptacle to trip and open the receptacle. Check for proper grounding wires and power line phasing if the GFCI receptacle does not trip as required. Press the RESET button to clear the tripped condition. Using unit-mounted convenience outlets Units with unit-mounted convenience outlet circuits will often re- quire that two disconnects be opened to de-energize all power to the unit. Treat all units as electrically energized until the conve- nience outlet power is also checked and de-energization is confirmed. Observe National Electrical Code Article 210, Branch Circuits, for use of convenience outlets. See Fig. 57.

WARNING

ELECTRICAL OPERATION HAZARD Failure to follow this warning could result in personal injury or death. Units with convenience outlet circuits may use multiple disconnects. Check convenience outlet for power status before opening unit for service. Locate its disconnect switch, if appropriate, and open it. Lock-out and tag-out this switch, if necessary.

CONVENIENCE OUTLET

ELECTRIC DISCONNECT

SWITCH

CONTROL BOX ACCESS PANEL

COVER - WHILE-IN-USE WEATHERPROOF

BASEPLATE FOR GFCI RECEPTACLE

GASKET

GFCI RECEPTACLE NOT INCLUDED

TOP

TO P

TOP

WET LOCATIONS

W ET LOCATIONS

40

Fig. 56 Powered Convenience Outlet Wiring

Fig. 57 Convenience Outlet Utilization Notice

HACR The amp rating of the HACR factory-installed option is based on the size, voltage, indoor motor and other electrical options of the unit as shipped from the factory. If field-installed accessories are added or changed in the field (i.e., power exhaust), the HACR may no longer be of the proper amp rating and therefore will need to be removed from the unit. See Fig. 58. See unit nameplate and label on factory-installed HACR for the amp rating of the HACR that was shipped with the unit from the factory. See unit name- plates for the proper fuse, HACR or maximum over-current pro- tection device required on the unit with field-installed accessories.

Fig. 58 HACR Caution Label

FACTORY-OPTION THRU-BASE CONNECTIONS All units are equipped with the ability to bring utilities through the base. Gas is brought up through an embossed area located in the gas section behind the gas entrance post. Access is gained through the gas access panel. A knock out must be removed to accomplish this. The electrical entrance is located in the control box area and can be accessed through the control box access panel. An embossed area is provided with three knock outs. High voltage is brought through the multi knock out by removing the appropriate size for the size of the fitting required. A 7/8-in. knock out is provided for low voltage. An additional 7/8-in. knock out is provided for a 115 v line which is used when the unit is equipped with the non-unit powered convenience outlet option. All required fittings are field supplied. Install fittings when access to both top and bottom of the base pan is available. See electrical and gas connections for routing and connection information. UNITS WITHOUT THRU-BASE CONNECTIONS 1. Install liquid tight conduit between disconnect and control

box. 2. Pull correctly rated high voltage wires through the conduit. 3. Install power lines to terminal connections as shown in

Fig. 53.

FIELD CONTROL WIRING The 48LC unit requires an external temperature control device such as a thermostat (field-supplied). THERMOSTAT Install a Carrier approved accessory 3-stage thermostat according to installation instructions included with the accessory. If a 3-stage cooling thermostat is not available use a 2-stage cooling thermo- stat instead, but note that this will limit cooling to just 2 stages. Locate the thermostat accessory on a solid wall in the conditioned space to sense average temperature in accordance with the ther- mostat installation instructions. If the thermostat contains a logic circuit requiring 24-v power, use a thermostat cable or equivalent single leads of different colors with minimum of eight leads. If the thermostat does not require a 24-v source (no C connection required), use a thermostat cable or equivalent with minimum of seven leads. Check the thermostat installation instructions for additional features which might re- quire additional conductors in the cable.

UNIT VOLTAGE

CONNECT AS

PRIMARY CONNECTIONS

TRANSFORMER TERMINALS

208, 230 240 L1: RED +YEL L2: BLU + GRA

H1 + H3 H2 + H4

460 480 L1: RED Splice BLU + YEL L2: GRA

H1 H2 + H3

H4

575 600 L1: RED L2: GRA

H1 H2

2.050HE501288

NOTICE/AVIS Convenience Outlet Utilization

Maximum Intermittent Use 15 - Amps Maximum Continuous Use 8 - Amps

Observe a 50% limit on the circuit Loading above 8 - Amps

Utilisation de la prise utilitaire Usage intermittent maximum 15 - Amps

Usage continu maximum 8 - Amps Observez une limite de 50% sur le circuit

Chargement au-dessus de 8 - Amps

41

For wire runs up to 50 ft (15 m), use no. 18 AWG (American Wire Gage) insulated wire (95F [35C] minimum). For 50 to 75 ft (15 to 23 m), use no. 16 AWG insulated wire (35C minimum). For over 75 ft (23 m), use no. 14 AWG insulated wire (95F [35C] minimum). All wire sizes larger than no. 18 AWG cannot be directly connected to the thermostat and will require a junction box and splice at the thermostat. UNIT WITHOUT THRU-BASE CONNECTION KIT Correctly rated low voltage wire can be routed through the rubber grommet located on the corner post adjacent to the control box ac- cess panel. Route wire through the grommet and then route the wire behind the corner post utilizing the factory provided wire ties secured to the control box. This will ensure separation of the field low voltage wire and the high voltage circuit. Route the low volt- age wire to the Integrated Staging Control (ISC) board. See Fig. 59. NOTE: If utilizing the through the base connections, route the low voltage wire through the wire ties to the Integrated Staging Con- trol (ISC) board (see Fig. 60).

Fig. 59 Typical Low-Voltage Control Connections

Fig. 60 Field Control Wiring Raceway

HEAT ANTICIPATOR SETTINGS Set heat anticipator settings at 0.14 amp for the first stage and 0.14 amp for second-stage heating. TRANSFORMER CONNECTION FOR 208-V POWER SUPPLY All units except 208/230-v units are factory wired for the voltage shown on the nameplate. If the 208/230-v unit is to be connected to a 208-v power supply, the control transformer must be rewired by moving the black wire with the 1/4-in. female spade connector from the 230-v connection and moving it to the 208-v 1/4-in. male terminal on the primary side of the transformer. Refer to unit label diagram for additional information.

RTU Open Controller (Factory-Installed Option) For details on operating 48LC*014-26 units equipped with the factory-installed RTU Open option, refer to the 48/50LC 07-26 Factory Installed Option RTU Open Multi-Protocol Controller Controls, Start-up, Operation and Troubleshooting manual.

C

G

C

G

O/B/Y2 Y2

RR

Y1 Y1

Y3 Y3

(Note 1) (Notes 2, 3 & 4)

(Note 3 & 4)

W1W1

W2 W2

T H E R M O S T A T

Note 1: Typical multi-function marking. Follow manufacturers configuration Instructions to select Y2.

Note 2: Y2 to Y3 connection required for 2-stage cooling operation and when integrated economizer function is desired.

Note 3: To Connect a 2-Stage Thermostat: Y2 to Y3 connection required for 2-stage cooling operation which provides low and high cooling states.

Note 4: SystemVu controller is default configured for 3-stage cooling and 2-stage heating thermostats; it can be configured for other thermostat types.

Field Wiring

Integrated Staging Control (ISC) Board or

SystemVuTM Controller

Typical Thermostat Connections

RUBBER GROMMET

CORNER POST

WIRE TIES

THRU THE BASE CONNECTION

42

SystemVu Controller (Factory-Installed Option) For details on operating 48LC*014-26 units equipped with the factory-installed SystemVu control option, refer to the 48/50LC 07-26 Single Package Rooftop Units with SystemVu Controls Version 2.X Controls, Start-up, Operation and Troubleshooting manual.

Humidi-MiZer System Control Connections NOTE: It is suggested to ensure the Auto-Changeover function of an installed thermostat is enabled when used in conjunction with the Humidi-MiZer Adaptive Dehumidification system. HUMIDI-MIZER SYSTEM SPACE RH CONTROLLER The Humidi-MiZer dehumidification system requires a field-sup- plied and installed space relative humidity control device. This de- vice may be a separate humidistat control (contact closes on rise in space RH above control setpoint) or a combination thermostat-hu- midistat control device with isolated contact set for dehumidifica- tion control. See Fig. 61. NOTE: Use of a humidistat device is not permitted on 48LC units equipped with RTU Open control; these units require use of a field-supplied RH sensor (33ZCSENSRH-02 or 33ZHCSEN- DRH-02), or a ZS series sensor with humidity sensing. System- Vu controls requires a Space Humidistat (HL38MG029) or a Wall Mount Space Humidity Sensor (33ZCSENSRH-01) or a Duct Mount Humidity Sensor (33ZCSENDRH-01).

To connect the Carrier humidistat (HL38MG029): 1. Route the humidistat 2-conductor cable (field-supplied)

through the hole provided in the unit corner post. 2. Feed wires through the raceway built into the corner post (see

Fig. 60) to the 24-v barrier located on the left side of the con- trol box. The raceway provides the ETL-required clearance between high-voltage and low-voltage wiring.

3. Use wire nuts to connect humidistat cable to two PINK leads in the low-voltage wiring as shown in Fig. 62.

NOTE: 48LC**14-26 units require a 3-stage cooling thermo- stat device and are not compatible with Carriers Edge Pro thermidistat.

Fig. 61 Accessory Field-Installed Humidistat

Fig. 62 Typical Humidi-MiZer Adaptive Dehumidification System Humidistat Wiring

% RELATIVE HUMIDITY

Humidistat

43

Integrated Staging Control (ISC) Board

Fig. 63 Integrated Staging Control (ISC) Board

DDC Control

Indoor Fan On Status

IGC Board

Power Plug

Phase Monitor Relay

Auxilary Shutdown

Condensate OverflowEconomizer

Occupancy

Status Code LEDs

Thermostat

DDC Control

Remote Shutdown

Smoke Shutdown

Smoke Alarm

Low Ambient Outdoor Fan

Control

Compressors

Reheat

Low-Pressure Switch

High-Pressure Switch

Indoor Fan Motor

Outdoor Fan Motors

44

NOTES: 1. Green LED Blinking at 1HZ indicates normal operation. 2. Solid red LED indicates an error exists, see above LED configuration.

ISC BOARD - SEQUENCE OF OPERATION General The Carrier Integrated Staging Control (ISC) is intended for use with a standard thermostat or direct digital controls (DDC) capa- ble of three cooling stages. After initial power to the board, a Green LED will blink with a 1 second duty cycle indicating the unit is running properly. In the event of the ISC board failing, the Green LED will be OFF or continuously ON. When the unit is not running properly, the Green LED will blink along with Red LED lights. The Red LED light configuration will indicate the type of error the board has identified. See Fig. 63 for LED locations and Table 8 for a list of status codes. The ISC board can be remotely shutdown by removing Jumper 4 and wiring to the Remote Shutdown terminal. The Smoke Control Module can shutdown the unit by removing Jumper 3 and wiring to the Smoke Shutdown terminal. The Smoke Alarm terminal on the ISC Board provides a pass through connection should a smoke alarm signal be connected. In the case of the RTU Open option, the RTU Open controller provides the signal which is passed through the ISC board to the Smoke Alarm terminal. The crankcase heater will run at all times except when the com- pressors are running. An auxiliary power supply (24Vac) available at TB-4 Terminal is provided to power auxiliary equipment. An optional Phase Monitor Relay can be wired to the PMR terminal by removing Jumper 5. An optional Condensate Flow Switch can be wired to the COFS Terminal by removing Jumper 7. Ventilation In the Ventilation/Fan Mode (G on the thermostat), the indoor- fan will run at low speed and the damper will operate at mini- mum position. Cooling In the Cooling Mode, the small and large compressors will be se- quenced to maintain the thermostat temperature setpoint. Table 9 shows the cooling operation based on the following conditions. The outdoor fan and VFD controlled indoor-fan will operate at low, medium and high speed. The indoor-fan speed (rpm) is fac- tory set by the CFM and static pressure requirements for the unit installed.

Humidi-MiZer System (Optional) In the Dehumidification Mode, both compressors will run and In- door airflow will be rise to High Speed. At subcooler reheating mode (reheat-1), during part load condi- tions when the room temperature and humidity are above the set point, the unit initiates the sub-cooling mode of operation; a call for cooling and dehumidification. RDV (Reheat Discharge Valve) and TWV (Three Way Valve) close; Indoor and Outdoor airflow will rise until reaching 100% of Speed. At hot-gas-bypass reheating mode (reheat-2), when there is a call for dehumidification without a call for cooling, a portion of the hot gas from the compressor bypasses the condenser coil when RDV opens and hot gas is fed into the liquid line, TWV closes in this mode and the system provides mainly latent cooling. Indoor air- flow will rise until reaching 100% of Speed, Outdoor airflow will run at High speed as long as outdoor temperature is above 80F (26.7C); when operating in this mode below 80F (26.7C) OAT, the system outdoor fan will operate as shown in Table 10 based on size.

Table 8 Status Code Descriptions for ISC Board LEDs

ERROR # ERROR NAME LED INDICATION

LED01 LED02 LED03 LED04 LED05 1 Check Smoke Detector/PMR/AUX. RED

Blinking Green LED (see

Note 1)

2 Check HPS/LPS/COFS. RED RED 3 Call for Y3 with no call for Y1. Check Y1 wiring. RED 4 Call for Y3 with no call for Y1/Y2. Check Y1 wiring. RED RED 5 Call for Y2 with no call for Y1. Check Y1 wiring. RED RED 6 Call for W2 with no call for W1. Check W1 wiring. RED RED 7 Call for heat (W1/W2) and cooling (Y1/Y2/Y3). Check thermostat wiring. RED RED RED RED 8 Call for heat (W1/W2) with no IFM. Check G wiring. RED RED RED 9 Call for cooling (Y1/Y2/Y3) with no G. Check G wiring. RED RED RED

10 Call for heat (W1/W2) and cooling (Y1/Y2/Y3) with no G. Check thermostat and G wiring. RED RED RED

11 Check ISC Board and the thermostat wiring. RED RED RED

12 Call for Economizer Y1 Feedback (ECON) from economizer with no call for Y1 from thermostat. Check thermostat and economizer wiring. RED

13 Check ISC Board and the thermostat wiring. RED RED 14 Check ISC Board and the thermostat wiring. RED 15 Check ISC Board and the thermostat wiring. RED RED

Table 9 Cooling Operation

INPUT OUTPUT

Thermostat Compressor C1

Compressor C2

Indoor Fan

Speed

Outdoor Fan

Speed First Stage

Cooling (Y1) On Off Low Low (700 rpm)

Second Stage Cooling (Y2) Off On Medium Medium

(800 rpm) Third Stage Cooling (Y3) On On High High

(1000 rpm)

Table 10 Outdoor Fan System

48LC UNIT RPM NUMBER OF FANS ON

NUMBER OF FANS OFF

14 250 3 0 17 250 4 0 20 160 4 0 24 250 6 0 26 250 6 0

45

Economizer (Optional) When the economizer is in Free Cooling Mode and a demand for cooling exists (Y1 on the thermostat), the economizer will modu- late the outdoor-air damper to provide a 50F (10C) to 55F (13C) mixed-air temperature into the zone and run the indoor-fan at high speed. As mixed-air temperature fluctuates above 55F (13C) or below 50F (10C) dampers will be modulated (open or close) to bring the mixed-air temperature back within control. Upon more call for cooling (Y2 on the thermostat), the outdoor-air damper will maintain its current position, compressor C1 will run and the outdoor-fan will run at low speed. If there is further de- mand for cooling, the outdoor-air damper will maintain its current position, compressor C2 will run and the outdoor-fan will run at medium speed. The VFD controlled indoor-fan will operate at high speed regardless of the cooling demand. If the increase in cooling capacity causes the mixed-air tempera- ture to drop below 45F (7C), the outdoor-air damper will return to the minimum position. If the mixed-air temperature continues to fall, the outdoor-air damper will close. Control returns to nor- mal once the mixed-air temperature rises above 48F (9C). The power exhaust fans will be energized and de-energized, if in- stalled, as the outdoor-air damper opens and closes. If field-installed accessory CO2 sensors are connected to the econ- omizer, a demand controlled ventilation strategy will begin to op- erate. As the CO2 level in the zone increases above the CO2 set- point, the minimum position of the damper will be increased pro- portionally. As the CO2 level decreases because of the increase of fresh air, the outdoor-air damper will be proportionally closed. For economizer operation, there must be a thermostat call for the fan (G). If the unit is occupied and the fan is on, the damper will oper- ate at minimum position. Otherwise, the damper will be closed. Low Ambient Cooling Operation Down to 40F (4C) In Low Ambient RTU conditions when the temperature is be- tween 55F (13C) and 40F (4C), the Low Ambient Switch (LAS) will be active and the outdoor fans will run to the pre-set factory outdoor-fan speed. When the temperature is greater than 65F (18C), the Low Ambient Switch will deactivate and the out- door fans will run in the standard cooling mode. If the Outdoor Fan Select Switch (see Fig. 64) is in the ON position, the outdoor fans will run in the Fan Cycle Speed Mode (FCS) set to 250 rpm. If the Outdoor Fan Select Switch is in the OFF position, the out- door fans will run in the Minimum Fan Speed Mode (MIN) set to 160 rpm regardless of the cooling demand. 48LC**14-26 units have a SPST normally open Low Ambient Switch wired across the TS and OF terminal and a jumper placed across the PS terminal (see Fig. 65). When the LAS is active, the switch will close making contact to the OF terminal. This is done for units that require all outdoor fans to run at the same pre-set fac- tory Low Ambient Speed. Table 11 shows the operation of the outdoor fan for each unit.

Fig. 64 Outdoor Fan Speed Select Switch

Fig. 65 Schematic of SPST Low Ambient Switch

Heating In the Heating Mode (W1 and G on the thermostat), the ISC board sends power to W on the IGC board. Assuming the unit is con- trolled through a room thermostat set for fan auto, the indoor-fan motor will energize and the outdoor-air dampers will open to their minimum position. The ISC board upon seeing W1 and G ON will turn the indoor fan to high speed. The IGC board starts its gas ignition process. A check is made to ensure that the rollout switch and limit switch are closed. If the check was successful, the induced draft motor is energized, and when its speed is satisfactory, as proven by the flue gas pressure switch, the ignition activation period begins. The burners will ig- nite within 5 seconds. If the burners do not light, there is a 22 second delay before another 5 second attempt. This sequence is repeated for 15 minutes or until the burners light. If, after the 15 minutes, the burners still have not lit, heating is locked out. To reset the control, break 24VAC power to the thermostat. When gas ignition occurs, the IGC board will continue to monitor the condition of the rollout switch, the limit switches, the flue gas pressure switch, as well as the flame sensor. When W1 is turned OFF, the IGC board turns off the gas valve. The IGC board has a delay time before it turns IFO=OFF. At this time, the ISC board sees W1=OFF and IFO=ON. The ISC will keep the indoor fan ON high speed. Once the IGC board delay times out, the ISC board will see W1=OFF and IFO=OFF, which then turns the indoor fan OFF. If the call for W1 lasted less than 1 minute, the heating cycle will not terminate until 1 minute after W1 became active. If the unit is controlled through a room thermostat set for fan auto, the indoor fan motor will continue to operate for an additional 45 seconds then stop. If the over temperature limit opens after the indoor mo- tor is stopped, but within 10 minutes of W1 becoming inactive, on the next cycle the time will be extended by 15 seconds. The maxi- mum delay is 3 minutes. Once modified, the fan OFF delay will not change back to 45 seconds unless power is reset to the control. A LED indicator is provided on the IGC to monitor operation. When additional heat is required, W2 closes and initiates power to the second stage of the main gas valve. When the thermostat is sat- isfied, the gas valve closes, interrupting the flow of gas to the main burners.

OF SPEED SELECT

ON FCS

MIN

OFF

Table 11 Low Ambient Temperature Outdoor Fan Control

48LC UNIT

NO. OF FANS ON

NO. OF FANS OFF SWITCH

OUTDOOR FAN SELECT SWITCH

RPM

14 3 0 SPST Up 250 17 4 0 SPST Up 250 20 4 0 SPST Up 250 24 6 0 SPST Up 250 26 6 0 SPST Up 250

JUMPER ON

LAS SPST

PS PS

TS OF

46

EconoMi$er X (Factory Option) The EconoMi$er X system is an expandable economizer con- trol system, which includes a W7220 economizer module (con- troller) with an LCD and keypad (see Fig. 66). The W7220 module can be configured with optional sensors.

Fig. 66 W7220 Economizer Module

The W7220 economizer module can be used as a stand-alone economizer module wired directly to a commercial set-back space thermostat and sensors to provide outside air dry-bulb economizer control. The W7220 economizer module can be connected to optional sensors for single or differential enthalpy control. The W7220 economizer module provides power and communications for the sensors. The W7220 economizer module automatically detects sensors by polling to determine which sensors are present. If a sensor loses communications after it has been detected, the W7220 economizer controller indicates a device fail error on its LCD. SYSTEM COMPONENTS The EconoMi$er X system includes an economizer module, 20k mixed air sensor, damper actuator, and either a 20k out- door air temperature sensor or S-Bus enthalpy sensors. Economizer Module The module is the core of the EconoMi$er X system. The module is mounted in the units control box, and includes the user interface for the system. The W7220 economizer module provides the basic inputs and outputs to provide simple economizer control. When used with the optional sensors, the economizer module provides more advanced economizer functionality. S-Bus Enthalpy Control Sensors The sensor is a combination temperature and humidity sensor which is powered by and communicates on the S-Bus. Up to three sensors may be configured with the W7220 economizer module. CO2 Sensor (optional) The CO2 sensor can be added for Demand Controlled Ventila- tion (DCV). SPECIFICATIONS W7220 Economizer Module The module is designed for use with 2 to 10 vdc or bus com- municating actuator. The module includes terminals for CO2

sensor, Mixed Air sensor, and an Outdoor Dry Bulb sensor. En- thalpy and other options are available with bus sensors. User Interface Provides status for normal operation, setup parameters, check- out tests, and alarm and error conditions with a 2-line 16 char- acter LCD display and four button keypad. Electrical Rated Voltage 20 to 30 vac RMS, 50/60 Hz Transformer 100 va maximum system input Nominal Power Consumption (at 24 vac, 60 Hz)

11.5 VA without sensors or actuators Relay Digital Output Rating at 30 vac (maximum power

from Class 2 input only) 1.5A run: 3.5A inrush at 0.45PF (200,000 cycles) or 7.5A inrush at 0.45PF (100,000 cycles)

External Sensors Power Output 21 vdc 5% at 48mA

INPUTS Sensors NOTE: A Mixed Air (MA) analog sensor is required on all W7220 units; either an Outdoor Air (OA) sensor for dry bulb change over or an OA bus sensor for outdoor enthalpy change over is required in addition to the MA sensor. An additional Return Air (RA) bus sensor can be added to the system for dif- ferential enthalpy or dry bulb changeover. For differential dry bulb changeover, a 20k ohm sensor is required in the OA and a bus sensor in the RA. DIP switch on RA bus sensor must be set in the RA position. Dry Bulb Temperature (optional) and Mixed Air (required), 20k NTC 2-wire (18 to 22 AWG); Temperature range 40F to 150F (40C to 66C) Temperature accuracy: 0F/+2F Temperature and Humidity, C7400S1000 (optional) S-Bus; 2-wire (18 to 22 AWG) Temperature: range 40F to 150F (40C to 65C) Temperature accuracy: 0F/+2F (18C/17C) Humidity: range 0 to 100% RH with 5% accuracy. NOTE: Up to three (3) S-Bus sensors may be connected to the W7220 economizer module for outdoor air (OA), return air (RA) and discharge (supply) air (DA). 4 Binary Inputs 1-wire 24 vac + common GND (see page 47 for wiring details). 24 vac power supply 20 to 30 vac 50/60Hz; 100 VA Class 2 transformer. OUTPUTS Actuator Signal 2 to 10 vdc; minimum actuator impedance is 2k ohm; bus two- wire output for bus communicating actuators. Exhaust fan, Y1, Y2 and AUX1 O All Relay Outputs (at 30 vac): Running: 1.5A maximum Inrush: 7.5A maximum

IMPORTANT: All inputs and outputs must be Class 2 wiring.

47

ENVIRONMENTAL Operating Temperature 40F to 150F (40C to 65C). Exception of display operation down to 4F (20C) with full recovery at 4F (20C) from exposure to 40F (40C) Storage Temperature 40F to 150F (40C to 65C) Shipping Temperature 40F to 150F (40C to 65C) Relative Humidity 5% to 95% RH non-condensing ECONOMIZER MODULE WIRING DETAILS Use Fig. 67 and Tables 12 and 13 to locate the wiring terminals for the Economizer module. NOTE: The four terminal blocks are removable. Slide out each terminal block, wire it, and then slide it back into place.

Fig. 67 W7220 Wiring Terminals

*Sylk is a trademark of Honeywell International Inc.

S-Bus Sensor Wiring The labels on the sensors and controller are color coded for ease of installation. Orange labeled sensors can only be wired to orange terminals on the controller. Brown labeled sensors can only be wired to S-bus (brown) terminals. Use Fig. 68 and Table 14 to locate the wiring terminals for each S-Bus and en- thalpy control sensor.

NA

AUX2-

OCC

E-GND

EXH1

AUX1-O

Y2-

Y1-

Y2-O

Y1-O

C

R

50048848-002 Rev. A

NA

A2

OCC

EX

A1

Y2I

Y2O

Y1I

Y1O

C

R

MAT

MAT

OAT

OAT

S-BUS

S-BUS

IAQ 2-10

IAQCOM

IAQ 24V

ACT 2-10

ACT COM

ACT 24V

MA MA

OA OA

SB SB

SB SB

SB SB

V C R

V C R

NA

50040839-001 Rev. G

HJW10 www.energy.ca.gov

Certified FDD Product California Title 24, Part 6

Table 12 Economizer Module (Left Hand Terminal Blocks)

LABEL TYPE DESCRIPTION Top Left Terminal Block

MAT MAT

20k NTC and COM

Mixed Air Temperature Sensor (Polarity Insensitive Connection)

OAT OAT

20k NTC and COM

Outdoor Air Temperature Sensor (Polarity Insensitive Connection)

S-BUS S-BUS

S-BUS (Sylk* Bus)

Enthalpy Control Sensor (Polarity Insensitive Connection)

Bottom Left Terminal Block

IAQ 2-10 2-10 vdc Air Quality Sensor Input (e.g. CO2 sensor)

IAQ COM COM Air Quality Sensor Common IAQ 24V 24 vac Air Quality Sensor 24 vac Source ACT 2-10 2-10 vdc Damper Actuator Output (2-10 vdc) ACT COM COM Damper Actuator Output Common ACT 24v 24 vac Damper Actuator 24 vac Source

Table 13 Economizer Module (Right Hand Terminal Blocks)

LABEL TYPE DESCRIPTION Top Right Terminal Blocks

AUX2 I 24 vac IN The first terminal is not used.

OCC 24 vac IN

Shut Down (SD) or HEAT (W) Conventional only and Heat Pump Changeover (O-B) in Heat Pump mode.

E-GND E-GND Occupied/Unoccupied Input EXH1 24 vac OUT Exhaust Fan 1 Output

AUX1 O 24 vac OUT

Programmable: Exhaust fan 2 output or ERV or System alarm output

Bottom Right Terminal Blocks

Y2-I 24 vac IN Y2 in - Cooling Stage 2 Input from space thermostat

Y2-O 24 vac OUT Y2 out - Cooling Stage 2 Output to stage 2 mechanical cooling

Y1-I 24 vac IN Y1 in - Cooling Stage 2 Input from space thermostat

Y1-O 24 vac OUT Y1 out - Cooling Stage 2 Output to stage 2 mechanical cooling

C COM 24 vac Common R 24 vac 24 vac Power (hot)

48

Fig. 68 S-Bus Sensor DIP Switches

Use Fig. 68 and Table 15 to set the DIP switches for the desired use of the sensor.

NOTE: When an S-Bus sensor is connected to an existing net- work, it will take 60 minutes for the network to recognize and auto-configure itself to use the new sensor. During the 60 minute setup period, no alarms for sensor fail- ures (except SAT) will be issued and no economizing function will be available. CO2 Sensor Wiring When using a CO2 sensor, the black and brown common wires are internally connected and only one is connected to IAQ COM on the W7220. Use the power from the W7220 to pow- er the CO2 sensor OR make sure the ground for the power sup- plies are common. See Fig. 69 for CO2 sensor wiring.

Fig. 69 CO2 Sensor Wiring

INTERFACE OVERVIEW This section describes how to use the EconoMi$er user inter- face for: Keypad and menu navigation Settings and parameter changes Menu structure and selection

User Interface The user interface consists of a 2-line LCD display and a 4-button keypad on the front of the economizer controller. Keypad Use the four navigation buttons (see Fig. 70) to scroll through the menus and menu items, select menu items, and to change parameter and configuration settings. To use the keypad when working with menus: Press the (Up arrow) button to move to the previous

menu. Press the (Down arrow) button to move to the next

menu. Press the (Enter) button to display the first item in the

currently displayed menu. Press the (Menu Up/Exit) button to exit a menus item

and return to the list of menus.

Fig. 70 W7220 Controller Navigation Buttons

Table 14 HH57AC081 Sensor Wiring Terminations

TERMINAL TYPE DESCRIPTION

NUMBER LABEL

1 S-BUS S-BUS

S-BUS Communications (Enthalpy Control

Sensor Bus)

2 S-BUS S-BUS

S-BUS Communications (Enthalpy Control

Sensor Bus)

Table 15 HH57AC081 Sensor DIP Switch

USE DIP SWITCH POSITIONS FOR SWITCHES 1, 2, AND 3

1 2 3 DA OFF ON OFF RA ON OFF OFF OA OFF OFF OFF

DIP SWITCH LABEL

DIP SWITCHES (3)

S-BUS 2 PIN SIDE CONNECTOR

S-BUS TERMINALS (1 AND 2)

CO2 SENSOR

24V

ANALOG OUT

L1 (HOT) L2

RED

BLACK

YELLOW

BROWN

ORANGE

GREEN

+

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

1

1

49

To use the keypad when working with Setpoints, System and Advanced Settings, Checkout tests and Alarms: 1. Navigate to the desired menu. 2. Press the (Enter) button to display the first item in the

currently displayed menu. 3. Use the and buttons to scroll to the desired

parameter. 4. Press the (Enter) button to display the value of the

currently displayed item. 5. Press the button to increase (change) the displayed

parameter value. 6. Press the button to decrease (change) the displayed

parameter value. NOTE: When values are displayed, pressing and holding the or button causes the display to automatically increment or decrement. 1. Press the (Enter) button to accept the displayed value

and store it in nonvolatile RAM. CHANGE STORED displays.

2. Press the (Enter) button to return to the current menu parameter.

3. Press the (Menu Up/Exit) button to return to the previ- ous menu.

Menu Structure Table 16 illustrates the complete hierarchy of menus and parame- ters for the EconoMi$er X system.

The Menus in display order are: STATUS SETPOINTS SYSTEM SETUP ADVANCED SETUP CHECKOUT ALARMS

NOTE: Some parameters in the menus use the letters MA or MAT, indicating a mixed air temperature sensor location before the cooling coil. This unit application has the control sensor locat- ed after the cooling coil, in the fan section, where it is designated as (Cooling) Supply Air Temperature or SAT sensor. SETUP AND CONFIGURATION Before being placed into service, the W7220 Economizer mod- ule must be set up and configured for the installed system.

The setup process uses a hierarchical menu structure that is easy to use. Press the and arrow buttons to move forward and backward through the menus and presses the button to se- lect and confirm setup item changes. Time-Out and Screensaver When no buttons have been pressed for 10 minutes, the LCD displays a screen saver, which cycles through the Status items. Each Status items displays in turn and cycles to the next item after 5 seconds.

IMPORTANT: During setup, the economizer module is live at all times.

50

Table 16 W7220 Menu Structure*

MENU PARAMETER PARAMETER

DEFAULT VALUE

PARAMETER RANGE AND INCREMENT

EXPANDED PARAMETER NAME Notes

STATUS

ECON AVAIL NO YES/NO FIRST STAGE COOLING DEMAND (Y1IN) YES = economizing available; the system can use outside air for free cooling when required

ECONOMIZING NO YES/NO FIRST STAGE COOLING RELAY OUTPUT YES = outside air being used for first stage cooling

OCCUPIED NO YES/NO

OCCUPIED YES = OCC signal received from space thermostat or unitary controller YES = 24 vac on terminal OCC NO = 0 vac on terminal OCC

HEAT PUMP N/A** COOL

HEAT

HEAT PUMP MODE Displays COOL or HEAT when system is set to heat pump (Non-conventional)

COOL Y1IN OFF ON/OFF

FIRST STAGE COOLING DEMAND (Y1-IN) Y1I signal from space thermostat or unitary controller for cooling stage 1. ON = 24 vac on terminal Y1I OFF = 0 vac on terminal Y1I

COOL Y1OUT OFF ON/OFF FIRST STAGE COOLING RELAY OUTPUT Cool stage 1 Relay Output to stage 1 mechanical cooling (Y1OUT terminal)

COOL Y2IN OFF ON/OFF

SECOND STAGE COOLING DEMAND (Y2IN) Y2I signal from space thermostat or unitary controller for second stage cooling. ON = 24 vac on terminal Y2I OFF = 0 vac on terminal Y2I

COOL Y2OUT OFF ON/OFF SECOND STAGE COOLING RELAY OUTPUT Cool Stage 2 Relay Output to mechanical cooling (Y2OUT terminal)

MA TEMP _ _ . _ F (or _ _ . _ C)

40F to 150F (40C to 66C)

SUPPLY AIR TEMPERATURE, Cooling Mode Displays value of measured mixed air from MAT sensor. Displays _ _ . _ F if not connected, short or out of range.

DA TEMP _ _ . _ F (or _ _ . _ C)

40F to 150F (40C to 66C)

DISCHARGE AIR TEMPERATURE, after Heating section Displays when Discharge Air Sylk Bus sensor is connected and displays measured discharge temperature. Displays _ _ . _F if sensor sends invalid value, if not connected, short or out of range.

OA TEMP _ _ . _ F (or _ _ . _ C)

40F to 140F (40C to 60C)

OUTSIDE AIR TEMP Displays measured value of outdoor air temperature. Displays _ _ . _F if sensor sends invalid value, short or out of range.

OA HUM _ _ % 0 to 100% OUTSIDE AIR RELATIVE HUMIDITY Displays measured value of outdoor humidity from OA Sylk Bus sensor. Displays _ _% if not connected short, or out of range.

RA TEMP _ _ . _ F (or _ _ . _ C)

0F to 140F (18C to 60C)

RETURN AIR TEMPERATURE Displays measured value of return air temperature from RAT Sylk Bus sensor. Displays _ _ . _ F if sensor sends invalid value, if not connected, short or out of range

RA HUM _ _ % 0 to 100%

RETURN AIR RELATIVE HUMIDITY Displays measured value of return air humidity from RA Sylk Bus sensor. Displays _ _% if sensor sends invalid value, if not connected, short or out of range

IN CO2 _ _ _ ppm 0 to 2000 ppm SPACE/RETURN AIR CO2 Displays value of measured CO2 from CO2 sensor. Invalid if not connected, short or out of range. May be adjusted in Advanced menu by Zero offset and Span.

DCV STATUS N/A ON/OFF DEMAND CONTROLLED VENTILATION STATUS Displays ON if above set point and OFF if below set point, and ONLY if a CO2 sensor is connected.

DAMPER OUT 2.0v 2.0 to 10.0v Displays voltage output to the damper actuator.*** ACT POS N/A 0 to 100% Displays actual position of actuator

ACT COUNT N/A 1 to 65,535 Displays number of times actuator has cycled. 1 cycle equals 180 degrees of actuator movement in any direction.

ACTUATOR N/A OK/Alarm (on Alarm menu) Displays ERROR if voltage or torque is below actuator range.

EXH1 OUT OFF ON/OFF

EXHAUST STAGE 1 RELAY OUTPUT Displays ON when damper position reaches programmed percentage set point. Output of EXH1 terminal: ON = relay closed OFF = relay open

51

STATUS (cont)

EXH2 OUT OFF ON/OFF

EXHAUST STAGE 2 RELAY OUTPUT Output of AUX1 O terminal Displays ON when damper position reaches programmed percentage set point. ON = 24 vac output OFF = No output Displays only if AUX1 O = EXH2

ERV OFF ON/OFF ENERGY RECOVERY VENTILATOR Output of AUX1 O terminal; displays only if AUX1 O = ERV ON = 24 vac output OFF = No Output

MECH COOL ON or

HEAT STAGES ON 0 0, 1, or 2

Displays stage of mechanical cooling that is active.

Displays the stage of heat pump heating that is active.

FAN SPEED N/A LOW or HIGH SUPPLY FAN SPEED Displays speed setting of fan on a 2-speed fan unit.

W (HEAT IN) N/A ON/OFF HEAT DEMAND STATUS Displays status of heat demand on a 2-speed fan unit.

SETPOINTS

MAT SET 53F (12C) 38F to 70F

(3C to 21C); increment by 1

degree

SUPPLY AIR SETPOINT The economizer will modulate the OA damper to maintain the mixed air temperature at the set point

LOW T LOCK 32F (0C) 45F to 80F

(43C to 27C); increment by 1F

COMPRESSOR LOW TEMPERATURE LOCKOUT Set point determines outdoor temperature when the mechanical cooling cannot be turned on. Commonly referred to as the Compressor lockout. At or below the set point, the Y1-O and Y2- O will not be energized on the controller.

DRYBLB SET 63F (17C) 48F to 80F

(9C to 27C); increment by 1F

OA DRY BULB TEMPERATURE CHANGEOVER SETPOINT Dry bulb set point will only appear if using dry bulb changeover. Set point determines where the economizer will assume outdoor air temperature is good for free cooling; e.g.; at 63F unit will economize at 62F and below and not economize at 64F and above. There is a 2F deadband.

ENTH CURVE ES3 ES1,ES2,ES3,ES4, or ES5

ENTHALPY CHANGEOVER CURVE ES curve will only appear if using enthalpy changeover. Enthalpy boundary curves for economizing using single enthalpy. See page 58 for description of enthalpy curves.

DCV SET 1100ppm 500 to 2000 ppm; increment by 100

DEMAND CONTROLLED VENTILATION Displays only if CO2 sensor is connected. Set point for Demand Controlled Ventilation of space. Above the set point, the OA dampers will modulate open to bring in additional OA to maintain a space ppm level below the set point.

MIN POS 2.8 V 2 to 10 vdc

VENTILATION MINIMUM POSITION Displays ONLY if a CO2 sensor is NOT connected. With 2-speed fan units, MIN POS L (low speed fan) and MIN POS H (high speed fan) settings are required. Default for MIN POS L is 3.2V and MIN POS H is 2.8V.

VENTMAX 2.8 V

2 to 10 vdc

DCV MAXIMUM DAMPER POSITION Displays only if a CO2 sensor is connected. Used for Vbz (ventilation max cfm) set point. VENTMAX is the same setting as MIN POS would be if unit did not have CO2 sensor.

100 to 9990 cfm; increment by 10

If OA, MA, RA, and CO2 sensors are connected and DCV CAL ENABLE is set to AUTO mode, the OA dampers are controlled by CFM and displays from 100 to 9990 CFM.

2 to 10 vdc With 2-speed fan units, VENTMAX L (low speed fan) and VENTMAX H (high speed fan) settings are required. Default for VENTMAX L is 3.2V and VENTMAX H is 2.8V

VENTMIN 2.25 V

2 to 10 vdc or 100 to 9990 cfm

increment by 10

DCV MINIMUM DAMPER POSITION Displays only if a CO2 sensor is connected. Used for Va (ventilation min cfm) set point. This is the ventilation for less than maximum occupancy of the space.

100 to 9990 cfm; increment by 10

If OA, MA, RA, and CO2 sensors are connected and DCV CAL ENABLE is set to AUTO mode, the OA dampers are controlled by CFM and displays from 100 to 9990 CFM.

2 to 10 vdc With 2-speed fan units VENTMIN L (low speed fan) and VENTMIN H (high speed fan) settings are required. Default for VENTMIN L is 2.5V and VENTMIN H is 2.25V

ERV OAT SP 32F (0C) 0F to 50F

(18C to 10C); increment by 1F

ENERGY RECOVERY VENTILATOR UNIT OUTDOOR AIR TEMPERATURE SETPOINT Only when AUX1 O = ERV

Table 16 W7220 Menu Structure* (cont)

MENU PARAMETER PARAMETER

DEFAULT VALUE

PARAMETER RANGE AND INCREMENT

EXPANDED PARAMETER NAME Notes

52

SETPOINTS (cont)

EXH1 SET 50% 0 to 100%; increment by 1

EXHAUST FAN STAGE 1 SETPOINT Set point for OA damper position when exhaust fan 1 is powered by the economizer. With 2-speed fan units, Exh1 L (low speed fan) and Exh1 H (high speed fan) settings are required. Default for Exh1 L is 65% and Exh1 H is 50%

EXH2 SET 75% 0 to 100%; increment by 1

EXHAUST FAN STAGE 2 SETPOINT Set point for OA damper position when exhaust fan 2 is powered by the economizer. Only used when AUX1 O is set to EHX2. With 2-speed fan units, Exh2 L (low speed fan) and Exh2 H (high speed fan) settings are required. Default for Exh2 L is 80% and Exh2 H is 75%

SYSTEM SETUP

INSTALL 01/01/10 N/A Display order = MM/DD/YY Setting order = DD, MM, then YY

UNITS DEG F F or C Sets economizer controller in degrees Fahrenheit or Celsius

EQUIPMENT CONV CONV

or HP

CONV = conventional; HP O/B = Enable Heat Pump mode. Use AUX2 I for Heat Pump input from thermostat or controller.

AUX2 IN W Shutdown (SD)

Heat (W1) HP(O) HP(B)

In CONV mode: SD = Enables configuration of shutdown (default); W = Informs controller that system is in heating mode. NOTE: If using 2-speed fan mode, you must program CONV mode for W. Shutdown is not available in 2-speed fan mode. In HP O/B mode: HP(O) = energize heat pump on Cool (default); HP(B) = energize heat pump on heat.

FAN SPEED 2 speed 1 speed/2 speed

Sets the economizer controller for operation of 1 speed or 2 speed supply fan. The controller does not control the fan, but positions the OA and RA dampers to heating or cooling mode. NOTE: 2-speed fan option also needs Heat (W1) programmed in AUX 2 In.

FAN CFM 5000 cfm 100 to 15000 cfm; increment by 100

UNIT DESIGN AIRFLOW (CFM) Enter only if using DCVCAL ENA = AUTO This is the capacity of the RTU. The value is found on the nameplate label for the specific unit.

AUX1 OUT NONE NONE ERV EXH2 SYS

Select OUTPUT for AUX1 O relay NONE = not configured (output is not used) ERV = Energy Recovery Ventilator

EXH2 = second damper position 24 vac out for second exhaust fan SYS = use output as an alarm signal

OCC INPUT INPUT or ALWAYS

OCCUPIED MODE BY EXTERNAL SIGNAL When using a setback thermostat with occupancy out (24 vac), the 24 vac is input INPUT to the OCC terminal. If no occupancy output from the thermostat, then change program to ALWAYS OR add a jumper from terminal R to OCC terminal.

FACTORY DEFAULT NO NO or YES Resets all set points to factory defaults when set to YES. LCD will briefly flash YES and change to NO but all parameters will change to the factory default values.

ADVANCED SETUP

MA LO SET 45F (7C) 35F to 65F

(2C to 18C); Increment by 1F

SUPPLY AIR TEMPERATURE LOW LIMIT Temperature to activate Freeze Protection (close damper or modulate to MIN POS if temp falls below set value).

FREEZE POS CLO CLO or MIN FREEZE PROTECTION DAMPER POSITION Damper position when freeze protection is active (closed or MIN POS).

CO2 ZERO 0ppm 0 to 500 ppm; Increment by 10 CO2 ppm level to match CO2 sensor start level.

CO2 SPAN 2000ppm 1000 to 3000 ppm; Increment by 50

CO2 ppm span to match CO2 sensor; e.g.: 500-1500 sensor output would be 500 CO2 zero and 1000 CO2 span.

STG3 DLY 2.0h 0 min, 5 min,

15 min, then 15 min intervals. Up to 4 hrs or OFF

COOLING STAGE 3 DELAY Delay after stage 2 cool has been active. Turns on second stage of cooling when economizer is first stage call and mechanical cooling is second stage call. Allows three stages of cooling, 1 economizer and 2 mechanical. OFF = no Stage 3 cooling

SD DMPR POS CLO CLO or OPN

Indicates shutdown signal from space thermostat or unitary controller. When controller receives 24 vac input on the SD terminal in conventional mode, the OA damper will open if programmed for OPN and OA damper will close if programmed for CLO. All other controls, e.g., fans, etc. will shut off.

DA LO ALM 45F (7C) NONE

35F to 65F (2C to 18C);

Increment by 5F

Used for alarm for when the DA air temperature is too low. Set lower range of alarm, below this temperature the alarm will show on the display.

Table 16 W7220 Menu Structure* (cont)

MENU PARAMETER PARAMETER

DEFAULT VALUE

PARAMETER RANGE AND INCREMENT

EXPANDED PARAMETER NAME Notes

53

ADVANCED SETUP (cont)

DA HI ALM 80F (27C) NONE

70F to 180F (21C to 82C);

Increment by 5F

Used for alarm for when the DA air temperature is too high. Sets upper range of alarm; above this temperature, the alarm will show on the display.

DCVCAL ENA MAN MAN (manual) AUTO

Turns on the DCV automatic control of the dampers. Resets ventilation based on the RA, OA, and MA sensor conditions. Requires all (RA, OA, MA, CO2) sensors. This operation is not operable with a 2-speed fan unit.

MAT T CAL 0.0F 2.5F SUPPLY AIR TEMPERATURE CALIBRATION Allows for the operator to adjust for an out of calibration temperature sensor.

OAS T CAL 0.0F 2.5F OUTSIDE AIR TEMPERATURE CALIBRATION Allows for the operator to adjust for an out of calibration temperature sensor.

OA H CAL 0% RH 10% RH OUTSIDE AIR HUMIDITY CALIBRATION Allows for operator to adjust for an out of calibration humidity sensor.

RA T CAL 0.0F 2.5F RETURN AIR TEMPERATURE CALIBRATION Allows for the operator to adjust for an out of calibration temperature sensor.

RA H CAL 0% RH 10% RH RETURN AIR HUMIDITY CALIBRATION Allows for operator to adjust for an out of calibration humidity sensor.

DA T CAL 0.0F 2.5F DISCHARGE AIR TEMPERATURE CALIBRATION Allows for the operator to adjust for an out of calibration temperature sensor.

2SP FAN DELAY 5 Minutes 0 to 20 minutes in

1 minute increments

TIME DELAY ON SECOND STAGE ECONOMIZING When in economizing mode, this is the delay for the high speed fan to try to satisfy the call for second stage cooling before the first stage mechanical cooling is enabled.

CHECKOUT***

DAMPER MINIMUM POSITION N/A N/A The checkout for the damper minimum position is based on the

system. See Table 17.

DAMPER OPEN N/A N/A Position damper to the full open position. Exhaust fan contacts enable during the DAMPER OPEN test. Make sure to pause in the mode to allow exhaust contacts to energize due to the delay in the system.

DAMPER CLOSE N/A N/A Positions damper to the fully closed position CONNECT Y1O N/A N/A Closes the Y1-O relay (Y1-O) CONNECT Y2O N/A N/A Closes the Y2-O relay (Y2-O)

CONNECT AUX1O N/A N/A

Energizes the AUX output. If Aux setting is: NONE no action taken ERV 24 vac out. Turns on or signals an ERV that the conditions are not good for economizing but are for ERV operation.

SYS 24 vac out. Issues a system alarm CONNECT EXH1 N/A N/A Closes the power exhaust fan 1 relay (EXH1)

ALARMS

Alarms display only when they are active. The menu title ALARMS(#) includes the number of active alarms in parenthesis ( ). When using SYLK bus sensors, SYLK will appear on the screen, and when using 20k OA temperature sensors, SENS T will

appear on the screen

MA T SENS ERR N/A N/A SUPPLY AIR TEMPERATURE SENSOR ERROR Mixed air sensor has failed or become disconnected - check wiring, then replace sensor if the alarm continues.

CO2 SENS ERR N/A N/A CO2 SENSOR ERROR CO2 sensor has failed, gone out of range or become disconnected - check wiring then replace sensor if the alarm continues.

OA SYLK T ERR N/A N/A OUTSIDE AIR S-BUS SENSOR ERROR Outdoor air enthalpy sensor has failed or become disconnected - check wiring, then replace sensor if the alarm continues.OA SYLK H ERR N/A N/A

RA SYLK T ERR N/A N/A RETURN AIR S-BUS SENSOR ERROR Return air enthalpy sensor has failed or become disconnected - check wiring, then replace sensor if the alarm continues.RA SYLK H ERR N/A N/A

DA SYLK T ERR N/A N/A DISCHARGE AIR S-BUS SENSOR ERROR Discharge air sensor has failed or become disconnected - check wiring, then replace sensor if the alarm continues.

OA SENS T ERR N/A N/A OUTSIDE AIR TEMPERATURE SENSOR ERROR Outdoor air temperature sensor has failed or become disconnected - check wiring, then replace if the alarm continues.

ACT ERROR N/A N/A

ACTUATOR ERROR Actuator has failed or become disconnected - check for stall, over voltage, under voltage and actuator count. Replace actuator if damper is movable and supply voltage is between 21.6 V and 26.4 V. Check actuator count on STATUS menu.

Table 16 W7220 Menu Structure* (cont)

MENU PARAMETER PARAMETER

DEFAULT VALUE

PARAMETER RANGE AND INCREMENT

EXPANDED PARAMETER NAME Notes

54

LEGEND

* Table 16 illustrates the complete hierarchy. Your menu parameters may be different depending on your configuration. For example, if you do not have a DCV (CO2) sensor, then none of the DCV parameters appear.

When values are displayed, pressing and holding the or button causes the display to automatically increment.

** N/A = Not Applicable. ERV Operation: When in cooling mode AND the conditions are NOT

OK for economizing - the ERV terminal will be energized. In the Heat- ing mode, the ERV terminal will be energized when the OA is below the ERV OAT set point in the set point menu.

*** After 10 minutes without a command or mode change, the controller will change to normal operation.

NOTES: 1. STATUS > OCCUPIED The factory-standard Occupancy

signal originates with a thermostat or other controller call for indoor fan operation at CTB terminal G. This signal passes through the Central Terminal Boards OCCUPANCY jumper to the ECONO connector and to the W7220s OCC input terminal. An external timeclock or relay is required to implement an Occupancy schedule on the economizer damper position.

2. STATUS > MA TEMP, SETPOINTS > MAT SET The W7220 menu parameters and labels include designations MA, MAT and Mixed Air for the economizer cooling control sensor. On these rooftop units, the economizer control sensor is located downstream of the evaporator/indoor coil in the supply fan section where this sensor is designated as Supply Air Temperature (SAT) sensor.

3. SETPOINTS > DRYBLB SET This point is not displayed if a Return Air (differential) temperature sensor or an Outdoor Air enthalpy sensor is connected.

4. SYSTEM SETUP parameters must be configured as noted for 2- Speed unit operation: EQUIPMENT = CONV AUX2 I = W FAN SPEED = 2SPEED

For damper minimum position settings and checkout menu read- ings, see Table 17. For dry bulb operation with a 1-speed fan, with or without DCV, see Tables 18 and 19. For enthalpy operation with a 1-speed fan, with or without DCV, see Tables 20 and 21. For dry bulb operation with a 2 speed indoor fan, with or without DCV, see Tables 22 and 23. For enthalpy operation with a 2 speed indoor fan, with or without DCV, see Tables 24 and 25.

ALARMS (cont)

FREEZE ALARM N/A N/A Check if outdoor temperature is below the LOW Temp Lockout on set point menu. Check if Mixed air temperature on STATUS menu is below the Lo Set point on Advanced menu. When conditions are back in normal range, the alarm will go away.

SHUTDOWN ACTIVE N/A N/A AUX2 IN is programmed for SHUTDOWN and 24 V has been applied to AUX2 IN terminal.

DMP CAL RUNNING N/A N/A

DAMPER CALIBRATION ROUTINE RUNNING If DCV Auto enable has been programmed, this alarm will display when the W7220 is completing a calibration on the dampers. Wait until the calibration is completed and the alarm will go away. Must have OA, MA and RA sensors for DCV calibration; set up is in the Advanced setup menu.

DA SENS ALM N/A N/A DISCHARGE AIR TEMPERATURE SENSOR ALARM Discharge air temperature is out of the range set in the ADVANCED SETUP Menu. Check the temperature of the discharge air.

SYS ALARM N/A N/A When AUX1-O is set to SYS and there is any alarm (e.g., failed sensors, etc.), the AUX1-O terminal has 24 vac out.

ACT UNDER V N/A N/A ACTUATOR VOLTAGE LOW Voltage received by actuator is above expected range.

ACT OVER V N/A N/A ACTUATOR VOLTAGE HIGH Voltage received by actuator is below expected range.

ACT STALLED N/A N/A ACTUATOR STALLED Actuator stopped before achieving commanded position.

Table 16 W7220 Menu Structure* (cont)

MENU PARAMETER PARAMETER

DEFAULT VALUE

PARAMETER RANGE AND INCREMENT

EXPANDED PARAMETER NAME Notes

CLO Compressor Lockout ERV Energy Recovery Ventilator LCD Liquid Crystal Display MA Mixed Air MAT Mixed Air Temperature N/A Not Applicable OA Outdoor Air OAT Outdoor Air Temperature OCC Occupied RA Return Air RAT Return Air Temperature RTU Rooftop Unit SYS System

55

*With stage 3 delay (STG3 DLY) in Advanced setup menu can turn on second stage of mechanical cooling Y2O after the delay if the call for YI and Y2I have not been satisfied.

*With stage 3 delay (STG3 DLY) in Advanced setup menu can turn on second stage of mechanical cooling Y2O after the delay if the call for YI and Y2I have not been satisfied.

Table 17 Damper Minimum Position Settings and Readings on Checkout Menu

DEMAND CONTROLLED VENTILATION (CO2 SENSOR)

FAN SPEED SETPOINTS CHECKOUT

NO 1

MIN POS VMAXHS N/A N/A

2 MIN POS H VMAXHS MIN POS L VMAXLS

YES

1 VENT MIN VMAXHS VENT MAX VMAXHS

2

VENT MIN H VMAXHS VENT MAX H VMAXLS VENT MIN L N/A VENT MAX L N/A

Table 18 Dry Bulb Operation without DCV (CO2 Sensor) 1 Speed Fan

DEMAND CONTROLLED

VENTILATION (DCV)

OUTSIDE AIR GOOD TO

ECONOMIZE Y1-I Y2-I FAN SPEED Y1-O Y2-O OCCUPIED UNOCCUPIED

NONE

No Off Off High 0-v/Off 0-v/Off MIN POS Closed On Off High 24-v/On 0-v/Off MIN POS Closed On On High 24-v/On 24-v/On MIN POS Closed

Yes

Off Off High 0-v/Off 0-v/Off MIN POS Closed

On Off High 0-v/Off 0-v/Off MIN POS to Full-Open

Closed to Full-Open

On On High 24-v/On 0-v/Off* MIN POS to Full-Open

Closed to Full-Open

Table 19 Dry Bulb Operation with DCV (CO2 Sensor) 1 Speed Fan

DEMAND CONTROLLED

VENTILATION (DCV)

OUTSIDE AIR GOOD TO

ECONOMIZE Y1-I Y2-I FAN SPEED Y1-O Y2-O OCCUPIED UNOCCUPIED

Below CO2 set

No Off Off High 0-v/Off 0-v/Off VENTMIN Closed On Off High 24-v/On 0-v/Off VENTMIN Closed On On High 24-v/On 24-v/On VENTMIN Closed

Yes

Off Off High 0-v/Off 0-v/Off VENTMIN Closed

On Off High 0-v/Off 0-v/Off VENTMIN to Full-Open

Closed to Full-Open

On On High 24-v/On 0-v/Off* VENTMIN to Full-Open

Closed to Full-Open

Above CO2 set

No

Off Off High 0-v/Off 0-v/Off VENTMIN to VENTMAX Closed

On Off High 24-v/On 0-v/Off VENTMIN to VENTMAX Closed

On On High 24-v/On 24-v/On VENTMIN to VENTMAX Closed

Yes

Off Off High 0-v/Off 0-v/Off VENTMIN to VENTMAX Closed

On Off High 0-v/Off 0-v/Off VENTMIN to Full-Open

Closed to Full-Open

On On High 24-v/On 0-v/Off* VENTMIN to Full-Open

Closed to Full-Open

56

*With stage 3 delay (STG3 DLY) in Advanced setup menu can turn on second stage of mechanical cooling Y2O after the delay if the call for YI and Y2I have not been satisfied.

*With 2SP FAN DELAY (Advanced Setup Menu) when in the economizing mode there is a delay for the high speed fan to try to satisfy the call for sec- ond stage cooling by turning on the fan to high and opening the OA damper 100% before the first stage mechanical cooling is enabled. With stage 3 delay (STG3 DLY) in Advanced setup menu can turn on second stage of mechanical cooling Y2O after the delay if the call for YI and Y2I have not been satisfied.

*With 2SP FAN DELAY (Advanced Setup Menu) when in the economizing mode there is a delay for the high speed fan to try to satisfy the call for sec- ond stage cooling by turning on the fan to high and opening the OA damper 100% before the first stage mechanical cooling is enabled. With stage 3 delay (STG3 DLY) in Advanced setup menu can turn on second stage of mechanical cooling Y2O after the delay if the call for YI and Y2I have not been satisfied.

Table 20 Enthalpy Operation without DCV (CO2 Sensor) 1 Speed Fan

DEMAND CONTROLLED

VENTILATION (DCV)

OUTSIDE AIR GOOD TO

ECONOMIZE Y1-I Y2-I FAN SPEED Y1-O Y2-O OCCUPIED UNOCCUPIED

NONE

No Off Off High 0-v/Off 0-v/Off MIN POS Closed On Off High 24-v/On 0-v/Off MIN POS Closed On On High 24-v/On 24-v/On MIN POS Closed

Yes

Off Off High 0-v/Off 0-v/Off MIN POS Closed

On Off High 0-v/Off 0-v/Off MIN POS to Full-Open

Closed to Full-Open

On On High 24-v/On 0-v/Off* MIN POS to Full-Open

Closed to Full-Open

Table 21 Enthalpy Operation with DCV (CO2 Sensor) 1 Speed Fan

DEMAND CONTROLLED

VENTILATION (DCV)

OUTSIDE AIR GOOD TO

ECONOMIZE Y1-I Y2-I FAN SPEED Y1-O Y2-O OCCUPIED UNOCCUPIED

Below CO2 set

No Off Off High 0-v/Off 0-v/Off VENTMIN Closed On Off High 24-v/On 0-v/Off VENTMIN Closed On On High 24-v/On 24-v/On VENTMIN Closed

Yes

Off Off High 0-v/Off 0-v/Off VENTMIN Closed

On Off High 0-v/Off 0-v/Off VENTMIN to Full-Open

Closed to Full-Open

On On High 24-v/On 0-v/Off VENTMIN to Full-Open

Closed to Full-Open

Above CO2 set

No

Off Off High 0-v/Off 0-v/Off VENTMIN to VENTMAX Closed

On Off High 24-v/On 0-v/Off VENTMIN L to VENTMAX Closed

On On High 24-v/On 24-v/On VENTMIN H to VENTMAX Closed

Yes

Off Off High 0-v/Off 0-v/Off VENTMIN L to VENTMAX Closed

On Off High 0-v/Off 0-v/Off VENTMIN to Full-Open

Closed to Full-Open

On On High DELAY* 24-v/On 0-v/Off VENTMIN to

Full-Open Closed to Full-Open

Table 22 Dry Bulb Operation without DCV (CO2 Sensor) 2 Speed Fan

DEMAND CONTROLLED

VENTILATION (DCV)

OUTSIDE AIR GOOD TO

ECONOMIZE Y1-I Y2-I FAN SPEED Y1-O Y2-O OCCUPIED UNOCCUPIED

NONE

No Off Off Low 0-v/Off 0-v/Off MIN POS L Closed On Off Low 24-v/On 0-v/Off MIN POS L Closed On On High 24-v/On 24-v/On MIN POS H Closed

Yes

Off Off Low 0-v/Off 0-v/Off MIN POS L Closed

On Off Low 0-v/Off 0-v/Off MIN POS L to Full-Open

Closed to Full-Open

On On High DELAY* 24-v/On 0-v/Off MIN POS H

to Full-Open Closed to Full-Open

57

*With 2SP FAN DELAY (Advanced Setup Menu) when in the economizing mode there is a delay for the high speed fan to try to satisfy the call for sec- ond stage cooling by turning on the fan to high and opening the OA damper 100% before the first stage mechanical cooling is enabled. With stage 3 delay (STG3 DLY) in Advanced setup menu can turn on second stage of mechanical cooling Y2O after the delay if the call for Y1I and Y2I have not been satisfied.

*With 2SP FAN DELAY (Advanced Setup Menu) when in the economizing mode there is a delay for the high speed fan to try to satisfy the call for second stage cooling by turning on the fan to high and opening the OA damper 100% before the first stage mechanical cooling is enabled. With stage 3 delay (STG3 DLY) in Advanced setup menu can turn on second stage of mechanical cooling Y2O after the delay if the call for Y1I and Y2I have not been satisfied.

Table 23 Dry Bulb Operation with DCV (CO2 Sensor) 2 Speed Fan

DEMAND CONTROLLED

VENTILATION (DCV)

OUTSIDE AIR GOOD TO

ECONOMIZE Y1-I Y2-I FAN

SPEED Y1-O Y2-O OCCUPIED UNOCCUPIED

Below CO2 Set

No OFF OFF LOW 0v/Off 0v/Off VENTMIN Closed ON OFF LOW 24v/On 0v/Off VENTMIN Closed ON ON HIGH 24v/On 24v/On VENTMIN Closed

Yes

OFF OFF LOW 0v/Off 0v/Off VENTMIN Closed

ON OFF LOW 0v/Off 0v/Off VENTMIN to Full-Open Closed to Full-Open

ON ON HIGH 24v/On 0v/Off VENTMIN to Full-Open Closed to Full-Open

Above CO2 Set

No

OFF OFF LOW 0v/Off 0v/Off VENTMIN to VENTMAX Closed

ON OFF LOW 24v/On 0v/Off VENTMIN to VENTMAX Closed

ON ON HIGH 24v/On 24v/On VENTMIN to VENTMAX Closed

Yes

OFF OFF LOW 0v/Off 0v/Off VENTMIN to VENTMAX Closed

ON OFF LOW 0v/Off 0v/Off VENTMIN to Full-Open Closed to Full-Open

ON ON HIGH DELAY* 24v/On 0v/Off VENTMIN to

Full-Open Closed to Full-Open

Table 24 Enthalpy Operation without DCV (CO2 Sensor) 2 Speed Fan

DEMAND CONTROLLED

VENTILATION (DCV)

OUTSIDE AIR GOOD TO

ECONOMIZE Y1-I Y2-I FAN

SPEED Y1-O Y2-O OCCUPIED UNOCCUPIED

NO CO2 SENSOR

NO OFF OFF LOW 0v/Off 0v/Off MIN POS Closed ON OFF LOW 24v/On 0v/Off MIN POS Closed ON ON HIGH 24v/On 24v/On MIN POS Closed

YES

OFF OFF LOW 0v/Off 0v/Off MIN POS Closed ON OFF LOW 0v/Off 0v/Off MIN POS to Full Open Closed to Full-Open

ON ON HIGH DELAY* 24v/On 0v/Off MIN POS to Full Open Closed to Full-Open

58

*With 2SP FAN DELAY (Advanced Setup Menu) when in the economizing mode there is a delay for the high speed fan to try to satisfy the call for second stage cooling by turning on the fan to high and opening the OA damper 100% before the first stage mechanical cooling is enabled. With stage 3 delay (STG3 DLY) in Advanced setup menu can turn on second stage of mechanical cooling Y2O after the delay if the call for Y1I and Y2I have not been satisfied.

ENTHALPY SETTINGS When the OA temperature, enthalpy and dew point are below the respective set points, the Outdoor Air can be used for economiz- ing. Figure 71 shows the new single enthalpy boundaries in the W7220. There are 5 boundaries (set points ES1 through ES5), which are defined by dry bulb temperature, enthalpy and dew point. Refer to Table 27 for ENTH CURVE set point values. The W7220 calculates the enthalpy and dew point using the OA temperature and humidity input from the OA enthalpy sensor. When the OA temperature, OA humidity and OA dew point are all below the selected boundary, the economizer sets the econo- mizing mode to YES, economizing is available. When all of the OA conditions are above the selected boundary, the conditions are not good to economize and the mode is set to NO. Figure 71 shows the 5 current boundaries. There is also a high lim- it boundary for differential enthalpy. The high limit boundary is ES1 when there are no stages of mechanical cooling energized and HL (high limit) when a compressor stage is energized. TWO-SPEED FAN OPERATION The W7220 controller has the capability to work with a system us- ing a 2-speed supply fan. The W7220 does not control the supply directly but uses the following input status to determine the speed of the supply fan and controls the OA damper to the required posi- tion, see Table 26.

The W (heating mode) is not controlled by the W7220 but it re- quires the status to know where to position the OA damper for minimum position for the fan speed. The 2 speed fan delay is available when the system is programmed for 2 speed fan (in the System Setup menu item). The 2 speed fan delay is defaulted to 5 minutes and can be changed in the Advanced Setup menu item. When the unit has a call for Y1 In and in the free cooling mode and there is a call for Y2 In, the 2- speed fan delay starts and the OA damper will modulate 100% open, the supply fan should be set to high speed by the unit con- troller. After the delay one of two actions will happen: The Y2 In call will be satisfied with the damper 100%

open and fan on high speed and the call will turn off OR

If the call for additional cooling in the space has not been satisfied then the first stage of mechanical cooling will be enabled through Y1 Out or Y2 Out.

Table 25 Enthalpy Operation with DCV (CO2 Sensor) 2 Speed Fan

DEMAND CONTROLLED

VENTILATION (DCV)

OUTSIDE AIR GOOD TO

ECONOMIZE Y1-I Y2-I FAN

SPEED Y1-O Y2-O OCCUPIED UNOCCUPIED

Below CO2 Set

No OFF OFF LOW 0v/Off 0v/Off VENTMIN Closed ON OFF LOW 24v/On 0v/Off VENTMIN Closed ON ON HIGH 24v/On 24v/On VENTMIN Closed

Yes

OFF OFF LOW 0v/Off 0v/Off VENTMIN Closed

ON OFF LOW 0v/Off 0v/Off VENTMIN to Full-Open Closed to Full-Open

ON ON HIGH 24v/On 0v/Off VENTMIN to Full-Open Closed to Full-Open

Above CO2 Set

No

OFF OFF LOW 0v/Off 0v/Off VENTMIN to VENTMAX Closed

ON OFF LOW 24v/On 0v/Off VENTMIN to VENTMAX Closed

ON ON HIGH 24v/On 24v/On VENTMIN to VENTMAX Closed

Yes

OFF OFF LOW 0v/Off 0v/Off VENTMIN to VENTMAX Closed

ON OFF LOW 0v/Off 0v/Off VENTMIN to Full-Open Closed to Full-Open

ON ON HIGH DELAY* 24v/On 0v/Off* VENTMIN to

Full-Open Closed to Full-Open

Table 26 Fan Speed

STATE FAN SPEED OCC Low Y1 Low Y2 High W High

59

Fig. 71 Single Enthalpy Curve Boundaries

CHECKOUT Inspect all wiring connections at the economizer modules termi- nals, and verify compliance with the installation wiring diagrams. For checkout, review the Status of each configured parameter and perform the Checkout tests. NOTE: For information about menu navigation and use of the keypad, see Interface Overview on page 48. Power Up After the W7220 module is mounted and wired, apply power. Initial Menu Display On initial start up, Honeywell displays on the first line and economizer W7220 on the second line. After a brief pause, the revision of the software appears on the first line and the second line will be blank. Power Loss (Outage or Brownout) All set points and advanced settings are restored after any pow- er loss or interruption. NOTE: All settings are stored in non-volatile flash memory. Status Use the Status menu (see Table 16) to check the parameter val- ues for the various devices and sensors configured. NOTE: For information about menu navigation and use of the keypad, see Interface Overview on page 48. Checkout Tests Use the Checkout menu (see page 53) to test the damper opera- tion and any configured outputs. Only items that are config- ured are shown in the Checkout menu. NOTE: For information about menu navigation and use of the keypad, see Interface Overview on page 48.

To perform a Checkout test: 1. Scroll to the desired test in the Checkout menu using the

and buttons. 2. Press the (Enter) button to select the item. RUN?

appears. 3. Press the (Enter) button to start the test. The unit

pauses and then displays IN PROGRESS. When the test is complete, DONE appears.

4. When all desired parameters have been tested, press the (Menu Up) button to end the test.

The Checkout tests can all be performed at the time of installa- tion or at any time during the operation of the system as a test that the system is operable.

TROUBLESHOOTING Alarms The economizer module provides alarm messages that display on the 2-line LCD. NOTE: Upon power up, the module waits 60 minutes before checking for alarms. This allows time for all the configured devices (e.g. sensors, actuator) to become operational. The exception is the SAT sensor which will alarm immediately.

ECONOMIZING AVAILABLE

NOT AVAILABLE

ENTHALPY RA HUM (%

RH)

R A

TE M

P TEMPERATURE

AB SO

LU TE

H U

M ID

IT Y

ES5 ES4 ES3 ES2 ES1 HL

P1 (T,RH)

P2 (T,RH)

SINGLE ENTHALPY

DUAL ENTHALPY HIGH LIMIT

Table 27 Single Enthalpy and Dual Enthalpy High Limit Curves

ENTHALPY CURVE

TEMP. DRY BULB (F)

TEMP. DEWPOINT (F)

ENTHALPY (btu/lb/da)

POINT P1 POINT P2

TEMP. (F) HUMIDITY (%RH) TEMP. (F) HUMIDITY

(%RH) ES1 80 60 28.0 80 36.8 66.3 80.1 ES2 75 57 26.0 75 39.6 63.3 80.0 ES3 70 54 24.0 70 42.3 59.7 81.4 ES4 65 51 22.0 65 44.8 55.7 84.2 ES5 60 48 20.0 60 46.9 51.3 88.5 HL 86 66 32.4 86 38.9 72.4 80.3

CAUTION

EQUIPMENT DAMAGE HAZARD Failure to follow this caution may result in equipment damage. Be sure to allow enough time for compressor start-up and shutdown between checkout tests so that you do not short- cycle the compressors.

60

If one or more alarms are present and there has been no keypad activity for at least 5 minutes, the Alarms menu displays and cycles through the active alarms. You can also navigate to the Alarms menu at any time. Clearing Alarms Once the alarm has been identified and the cause has been re- moved (e.g. replaced faulty sensor) the alarm can be cleared from the display. To clear an alarm, perform the following: 1. Navigate to the desired alarm. 2. Press the (Enter) button. ERASE? displays. 3. Press the (Enter) button. ALARM ERASED displays. 4. Press the (Menu up/Exit) button to complete the

action and return to the previous menu. NOTE: If the alarm still exists after clearing it, it is redisplayed within 5 seconds.

Staged Air Volume (SAV) with Variable Fre- quency Drive The Staged Air Volume (SAV) system utilizes a Variable Frequen- cy Drive (VFD) to automatically adjust the indoor fan motor speed in sequence with the units ventilation, cooling and heating operation. Per ASHRAE 90.1-2016 standard, during the first stage of cooling operation the SAV system will adjust the fan motor to provide 66% of the design airflow rate for the unit. When the call for the second stage of cooling is required, the SAV system will al- low the design airflow rate for the unit established (100%). During the heating mode, the SAV system will allow total design airflow rate (100%) operation. During ventilation mode, the SAV system will operate the fan motor at 66% speed. See Fig. 72 and 73 for Variable Frequency Drive and its location.

Fig. 72 Variable Frequency Drive (VFD)

61

Fig. 73 VFD Location

MULTI-SPEED VFD DISPLAY KIT (FIELD-INSTALLED OPTION) NOTE: The Remote VFD Keypad is part of the Multi-Speed VFD display kit (PN: CRDISKIT002A00) which is a field-installed op- tion. It is not included with the 48LC**14-26 base units.

Fig. 74 VFD Keypad

The VFD keypad as shown in Fig. 74 consists of the following sections. Alpha Numeric Display The LCD display is back lit with 2 alpha-numeric lines. All data is displayed on the LCD. See Fig. 75.

Fig. 75 Alphanumeric Display

Menu Key Use the Menu key to select between Status, Quick Menu, or Main Menu. The triangle icon at the bottom of the LCD display indi- cates the currently selected mode. (See number 5 in Fig. 75.) Navigation Keys and Status LEDs The Navigation keys and Status LEDs are detailed in Fig. 76.

230V/460V

575V ONLY

Off Reset

Hand On

Alarm

Warn.

On

Com.

OKBa ck

Auto On

StatusMenu Quick Menu

Main Menu

1-20 Motor Power [2] 0.12KW-0.16HP Setup 1

ALPHA NUMERIC DISPLAY

MENU KEY

NAVIGATION KEYS AND

STATUS LEDs

OPERATION KEYS & LEDs

1-20 Motor Power [2] 0.12KW-0.16HP Setup 1

1

3 2

4

5

1 Parameter number and name. 2 Parameter value.

3

Setup number shows the active setup and the edit setup. If the same set-up acts as both the active and edit set-up, only that setup number is shown (factory setting). When the active and edit setup differ, both numbers are shown in the display (SETUP 12). The flashing number indicates the edit setup.

4 The symbol in the number 4 position in the figure above indicates motor direction. The arrow point either clockwise or counter-clockwise to show the motors current direction.

5 The position of the triangle indicates the currently selected menu: Status, Quick Menu or Main Menu.

62

Fig. 76 Navigation Keys and Status LEDs

Operation Keys and LEDs Figure 77 details the functions of the Operating keys. An illumi- nated yellow LED above the key indicates the active key.

Fig. 77 Operation Keys and LEDs

CONNECTING THE KEYPAD TO THE VFD The VFD keypad can be mounted directly to the variable frequen- cy drive, provided you can easily access the front panel of the VFD. If you dont have easy access to the VFD front panel, use the cable included with the kit to connect the keypad to the VFD. Connecting the Keypad Directly to the VFD 1. Place the bottom of the VFD keypad into the variable fre-

quency drive as shown in Fig. 78. 2. Push the top of the VFD keypad into the variable frequency

drive as shown in Fig. 79.

Fig. 78 Align Bottom of VFD Keypad with Opening in VFD Front Panel

Fig. 79 Secure Keypad in Place

Using the Cable to Connect the Keypad to the VFD The VFD keypad can be connected to the variable frequency drive via the cable included with the Multi-Speed VFD display kit (PN: CRDISKIT002A00). See Fig. 80. 1. Connect the male end of the cable to the front panel of the

variable frequency drive. Use 2 of the screws included with the kit to secure the cable to the VFD.

2. Connect the female end of the cable to the back panel of the VFD Remote keypad. Secure the cable to the remote keypad using the 2 remaining screws from the kit.

Alarm

Warn.

On

Com.

OKBa ck

3

4

1

2

5

6

5

7

1 Com. LED: Flashes when bus communications is communicating.

2 Green LED/On: Control selection is working. 3 Yellow LED/Warn.: Indicates a warning. 4 Flashing Red LED/Alarm: Indicates an alarm.

5 Arrows : Use the Up and Down arrow keys to navigate between parameter groups, parameters and within parameters. Also used for setting local reference.

6 Back key: Press to move to the previous step or layer in the navigation structure.

7 OK key: Press to select the currently displayed parameter and for accepting changes to parameter settings.

Off Reset

Hand On

Auto On

1 2 3

1

Hand On key: Starts the motor and enables control of the variable frequency drive (VFD) via the VFD Keypad option. NOTE: Please note that terminal 27 Digital Input (5-12 Terminal 27 Digital Input) has coast inverse as default setting. This means that the Hand On key will not start the motor if there is no 24V to terminal 27, so be sure to connect terminal 12 to terminal 27.

2 Off/Reset key: Stops the motor (off). If in alarm mode, the alarm will be reset.

3 Auto On key: The variable frequency drive is controlled either via control terminals or serial communication.

63

Fig. 80 VFD Remote Keypad Cable

PROGRAM THE VFD FOR INDOOR FAN CONTROL

NOTE: This procedure requires use of the VFD Keypad which is included as part of the field-installed Multi-Speed VFD display kit (PN: CRDISKIT002A00). If the VFD keypad is not already installed, install it. See Connecting the Keypad to the VFD on page 62 for details. To program the VFD for variable indoor fan motor speeds: 1. At Power-Up:

At the first power up the LCD displays the Select Language screen. The default setting is English (see Fig. 81). To change the language, press the OK key and use the and keys to scroll to the desired language and then press OK.

NOTE: If English is not the desired language, press OK, select the desired language and press OK again.

Fig. 81 Keypad with Power Up Screen Displayed

2. Selecting Regional Settings: a. Press the Off Reset key. b. Press the Menu key to move the (triangle icon) so

it is positioned over Main Menu. The display shows the following.

c. Press the OK key and the display changes to:

NOTE: Press the Back key to return to the previous display. d. With the top row highlighted, press OK. The display

changes to:

e. Press (Down Arrow key) once; the display changes to:

f. Press OK; the [0] is now highlighted. g. Press (Down Arrow) key once; the display changes

to:

h. Press OK NOTE: If the Alarm 060 appears, follow Step 3 to clear the alarm. Make sure to press Off Reset when done. If there is no alarm, con- tinue at Step 4.

IMPORTANT: 48LC**14-26 units are programmed at the factory for variable indoor fan speeds. The following pro- cedure is only to be used to recover this function after an event such as a system crash.

Male Connector - connect to VFD Front Panel

Female Connector - connect to back of VFD Remote Keypad

0** Operation / Display 1** Load and Motor

00* Basic Settings 01* Set-up Operations

001 Language [0] English

003 Regional Settings [0] International

003 Regional Settings [1] North America

Off Reset

Hand On

Alarm

Warn.

On

Com.

OKBa ck

Auto On

StatusMenu Quick Menu

Main Menu

Select language English [0] English SETUP 1

64

3. Clearing Alarm 060: External Interlock: a. Press the Menu key twice to position the (triangle

icon) over Main Menu; the display changes to:

b. Press the (Down Arrow) key until the following display appears:

c. Press OK. The display changes to:

d. Press (Down Arrow) once to highlight the bottom row and press OK. The display changes to:

e. Press (Down Arrow) twice; the following display appears:

f. Press OK to highlight the number in the bracket. g. Press (Down Arrow) until the following display

appears:

h. Press OK. i. Press Off Reset. The Alarm indicator disappears.

4. Entering Grid Type: a. Press the Menu key to move the (triangle icon) so

it is positioned over Main Menu. The display shows the following:

b. Press OK twice; the display changes to:

c. Press (Down Arrow) three times to reach the fol- lowing display:

d. Press OK to highlight the number in the bracket and then use the and (Up and Down Arrow) keys to select the desired voltage and Hertz for the unit.

e. Press OK to accept the selection and continue. 5. Entering Motor Data:

a. Press the Menu key to move the (triangle icon) so it is positioned over Main Menu. The display shows the following:

b. Press (Down Arrow) once to highlight the bottom row.

c. Press OK, the display changes to:

d. Press (Down Arrow) twice to reach the following display:

e. Press OK; the following display appears:

NOTE: The number in the bracket may be different from what is shown above.

f. Press OK and then use the and (Up and Down Arrow) keys to scroll to the proper motor horsepower. Press OK again to set the selected hp.

g. Press (Down Arrow) once, the following display appears:

h. Press OK to highlight the voltage value. Use the and (Up and Down Arrow) keys to select the nameplate voltage. Press OK again to set the selected voltage.

i. Press (Down Arrow) once to display the following:

j. Press OK to highlight the Frequency value and then use the and (Up and Down Arrow) keys to select the nameplate Hz. Press OK again to set the selected Hz.

k. Press (Down Arrow) once to display the following:

l. Press OK to highlight the Current value and then use the and (Up and Down Arrow) keys to select the Max Amps value provided. Press OK again to set the selected Max Amps.

NOTE: The Max Amps is greater than the nameplate value. Check the VFD Unit Parameters (see Tables 28-32 on pages 68-73) and use the value listed for the given unit in the column labeled Motor Current Must-Hold Amps.

m. Press (Down Arrow) once to display the following:

n. Press OK to highlight the rpm value and then use the and (Up and Down Arrow) keys to select the nameplate rpm. Press OK again to set the selected rpm.

6. Entering Parameters for 1-71, 1-73, 1-82, and 1-90: a. Press the Menu key to move the (triangle icon) so

it is positioned over Main Menu. The display shows the following:

b. Press (Down Arrow) once to highlight the bottom row.

0** Operation / Display 1** Load and Motor

4** Limits / Warnings 5** Digital In/Out

50* Digital I/O Mode 51* Digital Inputs

510 Terminal 18 Digital In [8] Start

512 Terminal 27 Digital In [7] External Interlock

512 Terminal 27 Digital In [0] No operation

00* Basic Settings 01* Set-up Operations

001 Language [0] English

006 Grid Type [102] 200-240V/60Hz

0** Operation / Display 1** Load and Motor

10* General Settings 11* Motor Selection

11* Motor Selection 12* Motor Data

1-20 Motor Power [9] 1.5kW - 2 hp

1-22 Motor Voltage 230V

1-23 Motor Frequency 60Hz

1-24 Motor Current 6.61A

1-25 Motor Nominal Speed 1740 rpm

0** Operation / Display 1** Load and Motor

65

c. Press OK, the display changes to:

d. Press (Down Arrow) until the following display appears:

e. Press OK, the following display appears:

f. Press OK to highlight the number and then use the and (Up and Down Arrow) keys to select the num- ber provided in Tables 28-32. Press OK again to set the selected value.

g. Press (Down Arrow) twice, the following display appears:

h. Press OK to highlight the number in the bracket and then use the and (Up and Down Arrow) keys to select the number provided in Tables 28-32. Press OK again to set the selected value.

i. Press the Back key once, the following display appears:

j. Press (Down Arrow) once, the following display appears:

k. Press OK, the following display appears:

l. Press (Down Arrow) once, the following display appears:

m. Press OK to highlight the number and then use the and (Up and Down Arrow) keys to select the num- ber provided in Tables 28-32. Press OK again to set the selected value.

n. Press the Back key once, the following display appears:

o. Press (Down Arrow) once, the following display appears:

p. Press OK, the following display appears:

q. Press OK to highlight the number in the bracket then use the and (Up and Down Arrow) keys to select the number provided in Tables 28-32. Press OK again to set the selected value.

7. Setting References: a. Press the Menu key to move the (triangle icon) so

it is positioned over Main Menu. The display shows the following:

b. Press (Down Arrow) three times, the following display appears:

c. Press OK, the following display appears:

d. Press OK again, the following display appears:

NOTE: If the bottom row displays a number other than 0.000, press OK and use the and (Up and Down Arrow) key to select 0.000.

e. Press (Down Arrow) once, the following display appears:

NOTE: If the bottom row displays a number other than 60.000, press OK and use the and (Up and Down Arrow) key to select 60.000.

f. Press the Back key until the following display appears:

g. Press (Down Arrow) once to move the highlight to the bottom row and then press OK. The following dis- play appears:

h. Press OK once to highlight the number in the bracket. Press OK again; the highlight moves to the current percent value. Use the and (Up and Down Arrow) keys and the table below to enter the required Preset Reference values.

10* General Settings 11* Motor Selection

16* Load Depen. Setting 17* Start Adjustments

1-71 Start Delay 2.0s

1-73 Flying Start [1] Enabled

16* Load Depen. Setting 17* Start Adjustments

17* Start Adjustments 18* Stop Adjustments

1-80 Function at Stop [0] Coast

1-82 Min Speed for Functio 1.0 Hz

17* Start Adjustments 18* Stop Adjustments

18* Stop Adjustments 19* Motor Temperature

1-90 Motor Thermal Prote [4] ETR trip 1

0** Operation / Display 1** Load and Motor

2** Brakes 3** Reference / Ramps

30* Reference Limits 31* References

3-02 Minimum Reference 0.000

3-03 Maximum Reference 60.000

30* Reference Limits 31* References

3-10 Preset Reference [0]0.00%

[0]0.00% Stop

[1]LL.LL% Low Speed (see Tables 28-32, column labeled Preset References 3-10[1] for the proper % for each unit)

[2]MM.MM% Medium Speed (see Tables 28-32, col- umn labeled Preset References 3-10[2] for the proper % for each unit)

[3]100% Override (High Speed)

[4]100% High Speed (100% or close to 100% to achieve the required CFM at high speed)

[5]0.00% Stop [6]0.00% Stop [7]0.00% Stop

66

8. Setting the Ramp Time: a. Press the Back key until the following display appears:

b. Press (Down Arrow) twice, the following display appears:

c. Press OK, the following display appears:

d. Press OK again to highlight the bottom row and use the and (Up and Down Arrow) keys to select 10.00s. Press OK again to set the selected Ramp up Time.

e. Press (Down Arrow) once, the following display appears:

f. Press OK again to highlight the bottom row and use the and (Up and Down Arrow) keys to select 10.00s. Press OK again to set the selected Ramp Down Time.

9. Setting Limits: a. Press the Back key until the following display appears:

b. Press (Down Arrow) once, the following display appears:

c. Press OK, the following display appears:

d. Press OK again, the following display appears:

e. Press (Down Arrow) once, the following display appears:

f. Press (Down Arrow) again, the following display appears:

NOTE: Press OK to highlight the Hz value and then use the and (Up and Down Arrow) keys to enter the required values.

g. Press (Down Arrow) once, the following display appears:

NOTE: Press OK to highlight the % value and then use the and (Up and Down Arrow) keys to enter the required value. See Tables 28-32 for proper selection of the value for this parame- ter, then press OK to set the selected value.

h. Press (Down Arrow) once, the following display appears:

NOTE: Press OK to highlight the Hz value and then use the and (Up and Down Arrow) keys to enter the required values. 10. Setting Digital Inputs:

a. Press the Back key until the following display appears:

b. Press (Down Arrow) once, the following display appears:

c. Press OK, the following display appears:

d. Press (Down Arrow) once to move the highlight to the bottom row and then press OK. The following dis- play appears:

e. Press (Down Arrow) again. The following display appears:

f. Press (Down Arrow) again. The following display appears:

g. Press (Down Arrow) again. The following display appears:

NOTE: By pressing OK, the number in the bracket can be changed until the desired number appears. Press OK again to set the selected value. 11. Setting Analog Inputs:

a. Press the Back key until the following display appears:

b. Press (Down Arrow) until the following display appears:

c. Press OK, the following display appears:

d. Press (Down Arrow) once to move the highlight to the bottom row and then press OK. The following dis- play appears:

30* Reference Limits 31* References

31* References 34* Ramp 1

3-41 Ramp 1 Ramp up Time 3.00s

3-42 Ramp 1 Ramp Down Time 3.00s

2** Brakes 3** Reference / Ramps

3** Reference / Ramps 4** Limits / Warnings

41* Motor Limits 44* Adj. Warning 2

4-10 Motor Speed Direction [2] Both Directions

4-12 Motor Speed Low Limi 0.0Hz

4-14 Motor Speed High Limi 65.0Hz

4-18 Current Limit 110%

4-19 Max Output Frequency 65.0Hz

3** Reference / Ramps 4** Limits / Warnings

4** Limits / Warnings 5** Digital In/Out

50* Digital I/O mode 51* Digital Inputs

5-10 Terminal 18 Digital In [8] Start

5-11 Terminal 19 Digital In [16] Preset ref bit 0

5-12 Terminal 27 Digital In [17] Preset ref bit 1

5-13 Terminal 29 Digital In [18] Preset ref bit 2

4** Limits / Warnings 5** Digital In/Out

5** Digital In/Out 6** Analog In/Out

6** Analog In/Out 61* Analog Input 53

6-10 Terminal 53 Low Voltage 2V

67

e. Press (Down Arrow) once to move the highlight to the bottom row and then press OK. The following dis- play appears:

f. Press (Down Arrow) once to move the highlight to the bottom row and then press OK. The following dis- play appears:

g. Press (Down Arrow) once to move the highlight to the bottom row and then press OK. The following dis- play appears:

12. Setting Reset Mode and RFI Filter: a. Press the Back key until the following display

appears:

b. Press (Down Arrow) until the following display appears:

c. Press OK, the following display appears:

d. Press (Down Arrow) twice. The following display appears:

e. Press OK, the following display appears:

f. Press OK to highlight the number in the bracket. g. Use the and (Up and Down Arrow) keys to

change the number to 3 for 3 automatic resets and then press OK. The display changes to:

h. Press (Down Arrow) once, the following display appears:

i. Press OK to highlight the number of seconds and use the and (Up and Down Arrow) keys to select 600 seconds. Press OK again to set the selected value.

j. Press the Back key once, the following display appears:

k. Press (Down Arrow) twice, the following display appears:

l. Press OK, the following display appears:

m. Press OK to highlight the number in the bracket and use the and (Up and Down Arrow) keys to select [0]. Press OK again to set the selected value.

13. To Complete Reprogramming: Press the Auto On key before disconnecting the VFD Remote Keypad from the variable frequency drive.

6-11 Terminal 53 High Voltage [10V]

6-14 Set Min Reference [0 Hz]

6-15 Set Max Reference [60 Hz]

0** Operation / Display 1** Load and Motor

13** Smart Logic 14** Special Functions

140* Inverter Switching 141* Mains On/Off

141* Mains On/Off 142* Reset Functions

14-20 Reset Mode [0] Manual reset

14-20 Reset Mode [3] Automatic reset x 3

14-21 Automatic Restart T 10s

141* Mains On/Off 142* Reset Functions

144* Energy Optimising 145* Environment

14-50 RFI Filter [1] On

68

Table 28 VFD Unit Parameters 48LC**14

REGIONAL SETTINGS

GRID TYPE

MOTOR POWER

MOTOR VOLTAGE

MOTOR FREQUENCY

(Hz)

MOTOR CURRENT

(MUST-HOLD AMPS)

MOTOR NOMINAL

SPEED (RPM)

Motor Option Voltage Motor

P/N VFD

Carrier P/N VFD

Mfr P/N 003 006 120 122 123 124 125

STD 208/230 HD58FE654 HK30WA371 131L9796 [1] [102] [10] 230 60 9.2 1735

460 HD58FE654 HK30WA377 131L9864 [1] [122] [10] 460 60 4.2 1735 575 HD58FE577 HK30WA383 131N0227 [1] [132] [11] 575 60 4.9 1710

MID 208/230 HD60FK658 HK30WA372 131L9797 [1] [102] [13] 230 60 13.6 1745

460 HD60FK658 HK30WA379 131L9866 [1] [122] [13] 460 60 6.8 1745 575 HD60FE576 HK30WA387 134F0217 [1] [132] [13] 575 60 6.0 1745

HIGH 208/230 HD60FK657 HK30WA373 131L9798 [1] [102] [14] 230 60 21.2 1760

460 HD60FK657 HK30WA380 131L9867 [1] [122] [14] 460 60 9.7 1760 575 HD60FL576 HK30WA384 131N0229 [1] [132] [14] 575 60 7.2 1745

ULTRA 208/230 HD62FK654 HK30WA374 131L9799 [1] [102] [15] 230 60 28.0 1760

460 HD62FK654 HK30WA381 131L9868 [1] [122] [15] 460 60 13.7 1760 575 HD62FL576 HK30WA384 131N0229 [1] [132] [15] 575 60 8.9 1750

START DELAY (sec)

FLYING START

MIN SPEED FOR FUNCTION (Hz)

MOTOR THERMAL

PROTECTION PRESET REFERENCE

Motor Option Voltage 171 173 182 190 310 [0] 310 [1] 310 [2] 310 [3] 310 [4] 310 [5] 310 [6] 310 [7]

STD 208/230 2.0 [1] 1.0 [4] 0% 53.43% 79.57% 100% 100% 0% 0% 0%

460 2.0 [1] 1.0 [4] 0% 53.43% 79.57% 100% 100% 0% 0% 0% 575 2.0 [1] 1.0 [4] 0% 53.43% 79.57% 100% 100% 0% 0% 0%

MID 208/230 2.0 [1] 1.0 [4] 0% 53.43% 79.57% 100% 100% 0% 0% 0%

460 2.0 [1] 1.0 [4] 0% 53.43% 79.57% 100% 100% 0% 0% 0% 575 2.0 [1] 1.0 [4] 0% 53.43% 79.57% 100% 100% 0% 0% 0%

HIGH 208/230 2.0 [1] 1.0 [4] 0% 53.43% 79.57% 100% 100% 0% 0% 0%

460 2.0 [1] 1.0 [4] 0% 53.43% 79.57% 100% 100% 0% 0% 0% 575 2.0 [1] 1.0 [4] 0% 53.43% 79.57% 100% 100% 0% 0% 0%

ULTRA 208/230 2.0 [1] 1.0 [4] 0% 53.43% 79.57% 100% 100% 0% 0% 0%

460 2.0 [1] 1.0 [4] 0% 53.43% 79.57% 100% 100% 0% 0% 0% 575 2.0 [1] 1.0 [4] 0% 53.43% 79.57% 100% 100% 0% 0% 0%

RAMP UP TIME (sec)

RAMP DOWN TIME (sec)

CURRENT LIMIT

TERMINAL 18 DIGITAL INPUT

TERMINAL 19 DIGITAL INPUT

TERMINAL 27 DIGITAL INPUT

TERMINAL 29 DIGITAL INPUT

Motor Option Voltage 341 342 418 510 511 512 513

STD 208/230 10.00 10.00 100% [8] [16] [17] [18]

460 10.00 10.00 100% [8] [16] [17] [18] 575 10.00 10.00 100% [8] [16] [17] [18]

MID 208/230 10.00 10.00 100% [8] [16] [17] [18]

460 10.00 10.00 100% [8] [16] [17] [18] 575 10.00 10.00 100% [8] [16] [17] [18]

HIGH 208/230 10.00 10.00 100% [8] [16] [17] [18]

460 10.00 10.00 100% [8] [16] [17] [18] 575 10.00 10.00 100% [8] [16] [17] [18]

ULTRA 208/230 10.00 10.00 100% [8] [16] [17] [18]

460 10.00 10.00 100% [8] [16] [17] [18] 575 10.00 10.00 100% [8] [16] [17] [18]

69

Table 28 VFD Unit Parameters 48LC**14 (cont)

TERMINAL 53 LOW VOLTAGE

TERMINAL 53 HIGH VOLTAGE

TERMINAL 53 LOW REFERENCE

TERMINAL 53 HIGH REFERENCE

RESET MODE

AUTO. RESTART TIME (s)

RFI FILTER

Motor Option Voltage 610 611 614 615 1420 1421 1450

STD 208/230 2 [10] 0 [60] [3] 600 [0]

460 2 [10] 0 [60] [3] 600 [0] 575 2 [10] 0 [60] [3] 600 [0]

MID 208/230 2 [10] 0 [60] [3] 600 [0]

460 2 [10] 0 [60] [3] 600 [0] 575 2 [10] 0 [60] [3] 600 [0]

HIGH 208/230 2 [10] 0 [60] [3] 600 [0]

460 2 [10] 0 [60] [3] 600 [0] 575 2 [10] 0 [60] [3] 600 [0]

ULTRA 208/230 2 [10] 0 [60] [3] 600 [0]

460 2 [10] 0 [60] [3] 600 [0] 575 2 [10] 0 [60] [3] 600 [0]

Table 29 VFD Unit Parameters 48LC**17

REGIONAL SETTINGS

GRID TYPE

MOTOR POWER

MOTOR VOLTAGE

MOTOR FREQUENCY

(Hz)

MOTOR CURRENT

(MUST-HOLD AMPS)

MOTOR NOMINAL

SPEED (RPM)

Motor Option Voltage Motor

P/N VFD

Carrier P/N VFD

Mfr P/N 003 006 120 122 123 124 125

STD 208/230 HD58FE654 HK30WA371 131L9796 [1] [102] [10] 230 60 9.2 1735

460 HD58FE654 HK30WA377 131L9864 [1] [122] [10] 460 60 4.2 1735 575 HD58FE577 HK30WA383 131N0227 [1] [132] [11] 575 60 4.9 1710

MID 208/230 HD60FK657 HK30WA373 131L9798 [1] [102] [14] 230 60 21.2 1760

460 HD60FK657 HK30WA380 131L9867 [1] [122] [14] 460 60 9.7 1760 575 HD60FL576 HK30WA384 131N0229 [1] [132] [14] 575 60 7.2 1745

HIGH 208/230 HD62FK654 HK30WA374 131L9799 [1] [102] [15] 230 60 28.0 1760

460 HD62FK654 HK30WA381 131L9868 [1] [122] [15] 460 60 13.7 1760 575 HD62FL576 HK30WA384 131N0229 [1] [132] [15] 575 60 8.9 1750

ULTRA 208/230 HD64FK654 HK30WA375 131L9800 [1] [102] [16] 230 60 37.3 1755

460 HD64FK654 HK30WA386 131L9869 [1] [122] [16] 460 60 16.9 1755 575 HD64FL576 HK30WA388 131N0233 [1] [132] [16] 575 60 12.6 1755

START DELAY (sec)

FLYING START

MIN SPEED FOR FUNCTION (Hz)

MOTOR THERMAL

PROTECTION PRESET REFERENCE

Motor Option Voltage 171 173 182 190 310 [0] 310 [1] 310 [2] 310 [3] 310 [4] 310 [5] 310 [6] 310 [7]

STD 208/230 2.0 [1] 1.0 [4] 0% 56.64% 82.40% 100% 100% 0% 0% 0%

460 2.0 [1] 1.0 [4] 0% 56.64% 82.40% 100% 100% 0% 0% 0% 575 2.0 [1] 1.0 [4] 0% 56.64% 82.40% 100% 100% 0% 0% 0%

MID 208/230 2.0 [1] 1.0 [4] 0% 56.64% 82.40% 100% 100% 0% 0% 0%

460 2.0 [1] 1.0 [4] 0% 56.64% 82.40% 100% 100% 0% 0% 0% 575 2.0 [1] 1.0 [4] 0% 56.64% 82.40% 100% 100% 0% 0% 0%

HIGH 208/230 2.0 [1] 1.0 [4] 0% 56.64% 82.40% 100% 100% 0% 0% 0%

460 2.0 [1] 1.0 [4] 0% 56.64% 82.40% 100% 100% 0% 0% 0% 575 2.0 [1] 1.0 [4] 0% 56.64% 82.40% 100% 100% 0% 0% 0%

ULTRA 208/230 2.0 [1] 1.0 [4] 0% 56.64% 82.40% 100% 100% 0% 0% 0%

460 2.0 [1] 1.0 [4] 0% 56.64% 82.40% 100% 100% 0% 0% 0% 575 2.0 [1] 1.0 [4] 0% 56.64% 82.40% 100% 100% 0% 0% 0%

70

Table 29 VFD Unit Parameters 48LC**17 (cont)

RAMP UP TIME (sec)

RAMP DOWN TIME (sec)

CURRENT LIMIT

TERMINAL 18 DIGITAL INPUT

TERMINAL 19 DIGITAL INPUT

TERMINAL 27 DIGITAL INPUT

TERMINAL 29 DIGITAL INPUT

Motor Option Voltage 341 342 418 510 511 512 513

STD 208/230 10.00 10.00 100% [8] [16] [17] [18]

460 10.00 10.00 100% [8] [16] [17] [18] 575 10.00 10.00 100% [8] [16] [17] [18]

MID 208/230 10.00 10.00 100% [8] [16] [17] [18]

460 10.00 10.00 100% [8] [16] [17] [18] 575 10.00 10.00 100% [8] [16] [17] [18]

HIGH 208/230 10.00 10.00 100% [8] [16] [17] [18]

460 10.00 10.00 100% [8] [16] [17] [18] 575 10.00 10.00 100% [8] [16] [17] [18]

ULTRA 208/230 10.00 10.00 100% [8] [16] [17] [18]

460 10.00 10.00 100% [8] [16] [17] [18] 575 10.00 10.00 100% [8] [16] [17] [18]

TERMINAL 53 LOW VOLTAGE

TERMINAL 53 HIGH VOLTAGE

TERMINAL 53 LOW REFERENCE

TERMINAL 53 HIGH REFERENCE

RESET MODE

AUTO. RESTART TIME (s)

RFI FILTER

Motor Option Voltage 610 611 614 615 1420 1421 1450

STD 208/230 2 [10] 0 [60] [3] 600 [0]

460 2 [10] 0 [60] [3] 600 [0] 575 2 [10] 0 [60] [3] 600 [0]

MID 208/230 2 [10] 0 [60] [3] 600 [0]

460 2 [10] 0 [60] [3] 600 [0] 575 2 [10] 0 [60] [3] 600 [0]

HIGH 208/230 2 [10] 0 [60] [3] 600 [0]

460 2 [10] 0 [60] [3] 600 [0] 575 2 [10] 0 [60] [3] 600 [0]

ULTRA 208/230 2 [10] 0 [60] [3] 600 [0]

460 2 [10] 0 [60] [3] 600 [0] 575 2 [10] 0 [60] [3] 600 [0]

Table 30 VFD Unit Parameters 48LC**20

REGIONAL SETTINGS

GRID TYPE

MOTOR POWER

MOTOR VOLTAGE

MOTOR FREQUENCY

(Hz)

MOTOR CURRENT

(MUST-HOLD AMPS)

MOTOR NOMINAL

SPEED (RPM)

Motor Option Voltage Motor

P/N VFD

Carrier P/N VFD

Mfr P/N 003 006 120 122 123 124 125

STD 208/230 HD60FE656 HK30WA372 131L9797 [1] [102] [11] 230 60 11.7 1750

460 HD60FE656 HK30WA378 131L9865 [1] [122] [11] 460 60 5.4 1750 575 HD58FE577 HK30WA383 131N0227 [1] [132] [11] 575 60 4.9 1710

MID 208/230 HD60FK657 HK30WA373 131L9798 [1] [102] [14] 230 60 21.2 1760

460 HD60FK657 HK30WA380 131L9867 [1] [122] [14] 460 60 9.7 1760 575 HD60FL576 HK30WA384 131N0229 [1] [132] [14] 575 60 7.2 1745

HIGH 208/230 HD62FK654 HK30WA374 131L9799 [1] [102] [15] 230 60 28.0 1760

460 HD62FK654 HK30WA381 131L9868 [1] [122] [15] 460 60 13.7 1760 575 HD62FL576 HK30WA384 131N0229 [1] [132] [15] 575 60 8.9 1750

ULTRA 208/230 HD64FK654 HK30WA375 131L9800 [1] [102] [16] 230 60 37.3 1755

460 HD64FK654 HK30WA386 131L9869 [1] [122] [16] 460 60 16.9 1755 575 HD64FL576 HK30WA388 131N0233 [1] [132] [16] 575 60 12.6 1755

71

Table 30 VFD Unit Parameters 48LC**20 (cont)

START DELAY (sec)

FLYING START

MIN SPEED FOR FUNCTION (Hz)

MOTOR THERMAL

PROTECTION PRESET REFERENCE

Motor Option Voltage 171 173 182 190 310 [0] 310 [1] 310 [2] 310 [3] 310 [4] 310 [5] 310 [6] 310 [7]

STD 208/230 2.0 [1] 1.0 [4] 0% 52.57% 61.63% 100% 100% 0% 0% 0%

460 2.0 [1] 1.0 [4] 0% 52.57% 61.63% 100% 100% 0% 0% 0% 575 2.0 [1] 1.0 [4] 0% 52.57% 61.63% 100% 100% 0% 0% 0%

MID 208/230 2.0 [1] 1.0 [4] 0% 52.57% 61.63% 100% 100% 0% 0% 0%

460 2.0 [1] 1.0 [4] 0% 52.57% 61.63% 100% 100% 0% 0% 0% 575 2.0 [1] 1.0 [4] 0% 52.57% 61.63% 100% 100% 0% 0% 0%

HIGH 208/230 2.0 [1] 1.0 [4] 0% 52.57% 61.63% 100% 100% 0% 0% 0%

460 2.0 [1] 1.0 [4] 0% 52.57% 61.63% 100% 100% 0% 0% 0% 575 2.0 [1] 1.0 [4] 0% 52.57% 61.63% 100% 100% 0% 0% 0%

ULTRA 208/230 2.0 [1] 1.0 [4] 0% 52.57% 61.63% 100% 100% 0% 0% 0%

460 2.0 [1] 1.0 [4] 0% 52.57% 61.63% 100% 100% 0% 0% 0% 575 2.0 [1] 1.0 [4] 0% 52.57% 61.63% 100% 100% 0% 0% 0%

RAMP UP TIME (sec)

RAMP DOWN TIME (sec)

CURRENT LIMIT

TERMINAL 18 DIGITAL INPUT

TERMINAL 19 DIGITAL INPUT

TERMINAL 27 DIGITAL INPUT

TERMINAL 29 DIGITAL INPUT

Motor Option Voltage 341 342 418 510 511 512 513

STD 208/230 10.00 10.00 100% [8] [16] [17] [18]

460 10.00 10.00 100% [8] [16] [17] [18] 575 10.00 10.00 100% [8] [16] [17] [18]

MID 208/230 10.00 10.00 100% [8] [16] [17] [18]

460 10.00 10.00 100% [8] [16] [17] [18] 575 10.00 10.00 100% [8] [16] [17] [18]

HIGH 208/230 10.00 10.00 100% [8] [16] [17] [18]

460 10.00 10.00 100% [8] [16] [17] [18] 575 10.00 10.00 100% [8] [16] [17] [18]

ULTRA 208/230 10.00 10.00 100% [8] [16] [17] [18]

460 10.00 10.00 100% [8] [16] [17] [18] 575 10.00 10.00 100% [8] [16] [17] [18]

TERMINAL 53 LOW VOLTAGE

TERMINAL 53 HIGH VOLTAGE

TERMINAL 53 LOW REFERENCE

TERMINAL 53 HIGH REFERENCE

RESET MODE

AUTO. RESTART TIME (s)

RFI FILTER

Motor Option Voltage 610 611 614 615 1420 1421 1450

STD 208/230 2 [10] 0 [60] [3] 600 [0]

460 2 [10] 0 [60] [3] 600 [0] 575 2 [10] 0 [60] [3] 600 [0]

MID 208/230 2 [10] 0 [60] [3] 600 [0]

460 2 [10] 0 [60] [3] 600 [0] 575 2 [10] 0 [60] [3] 600 [0]

HIGH 208/230 2 [10] 0 [60] [3] 600 [0]

460 2 [10] 0 [60] [3] 600 [0] 575 2 [10] 0 [60] [3] 600 [0]

ULTRA 208/230 2 [10] 0 [60] [3] 600 [0]

460 2 [10] 0 [60] [3] 600 [0] 575 2 [10] 0 [60] [3] 600 [0]

72

Table 31 VFD Unit Parameters 48LC**24

REGIONAL SETTINGS

GRID TYPE

MOTOR POWER

MOTOR VOLTAGE

MOTOR FREQUENCY

(Hz)

MOTOR CURRENT

(MUST-HOLD AMPS)

MOTOR NOMINAL

SPEED (RPM)

Motor Option Voltage Motor

P/N VFD

Carrier P/N VFD

Mfr P/N 003 006 120 122 123 124 125

STD 208/230 HD60FK657 HK30WA373 131L9798 [1] [102] [14] 230 60 21.2 1760

460 HD60FK657 HK30WA380 131L9867 [1] [122] [14] 460 60 9.7 1760 575 HD60FL576 HK30WA384 131N0229 [1] [132] [14] 575 60 7.2 1745

MID 208/230 HD62FK654 HK30WA374 131L9799 [1] [102] [15] 230 60 28.0 1760

460 HD62FK654 HK30WA381 131L9868 [1] [122] [15] 460 60 13.7 1760 575 HD62FL576 HK30WA384 131N0229 [1] [132] [15] 575 60 8.9 1750

HIGH 208/230 HD64FK654 HK30WA375 131L9800 [1] [102] [16] 230 60 37.3 1755

460 HD64FK654 HK30WA386 131L9869 [1] [122] [16] 460 60 16.9 1755 575 HD64FL576 HK30WA388 131N0233 [1] [132] [16] 575 60 12.6 1755

START DELAY (sec)

FLYING START

MIN SPEED FOR FUNCTION (Hz)

MOTOR THERMAL

PROTECTION PRESET REFERENCE

Motor Option Voltage 171 173 182 190 310 [0] 310 [1] 310 [2] 310 [3] 310 [4] 310 [5] 310 [6] 310 [7]

STD 208/230 2.0 [1] 1.0 [4] 0% 52.33% 64.48% 100% 100% 0% 0% 0%

460 2.0 [1] 1.0 [4] 0% 52.33% 64.48% 100% 100% 0% 0% 0% 575 2.0 [1] 1.0 [4] 0% 52.33% 64.48% 100% 100% 0% 0% 0%

MID 208/230 2.0 [1] 1.0 [4] 0% 52.33% 64.48% 100% 100% 0% 0% 0%

460 2.0 [1] 1.0 [4] 0% 52.33% 64.48% 100% 100% 0% 0% 0% 575 2.0 [1] 1.0 [4] 0% 52.33% 64.48% 100% 100% 0% 0% 0%

HIGH 208/230 2.0 [1] 1.0 [4] 0% 52.33% 64.48% 100% 100% 0% 0% 0%

460 2.0 [1] 1.0 [4] 0% 52.33% 64.48% 100% 100% 0% 0% 0% 575 2.0 [1] 1.0 [4] 0% 52.33% 64.48% 100% 100% 0% 0% 0%

RAMP UP TIME (sec)

RAMP DOWN TIME (sec)

CURRENT LIMIT

TERMINAL 18 DIGITAL INPUT

TERMINAL 19 DIGITAL INPUT

TERMINAL 27 DIGITAL INPUT

TERMINAL 29 DIGITAL INPUT

Motor Option Voltage 341 342 418 510 511 512 513

STD 208/230 10.00 10.00 100% [8] [16] [17] [18]

460 10.00 10.00 100% [8] [16] [17] [18] 575 10.00 10.00 100% [8] [16] [17] [18]

MID 208/230 10.00 10.00 100% [8] [16] [17] [18]

460 10.00 10.00 100% [8] [16] [17] [18] 575 10.00 10.00 100% [8] [16] [17] [18]

HIGH 208/230 10.00 10.00 100% [8] [16] [17] [18]

460 10.00 10.00 100% [8] [16] [17] [18] 575 10.00 10.00 100% [8] [16] [17] [18]

TERMINAL 53 LOW VOLTAGE

TERMINAL 53 HIGH VOLTAGE

TERMINAL 53 LOW REFERENCE

TERMINAL 53 HIGH REFERENCE

RESET MODE

AUTO. RESTART TIME (s)

RFI FILTER

Motor Option Voltage 610 611 614 615 1420 1421 1450

STD 208/230 2 [10] 0 [60] [3] 600 [0]

460 2 [10] 0 [60] [3] 600 [0] 575 2 [10] 0 [60] [3] 600 [0]

MID 208/230 2 [10] 0 [60] [3] 600 [0]

460 2 [10] 0 [60] [3] 600 [0] 575 2 [10] 0 [60] [3] 600 [0]

HIGH 208/230 2 [10] 0 [60] [3] 600 [0]

460 2 [10] 0 [60] [3] 600 [0] 575 2 [10] 0 [60] [3] 600 [0]

73

Table 32 VFD Unit Parameters 48LC**26

REGIONAL SETTINGS

GRID TYPE

MOTOR POWER

MOTOR VOLTAGE

MOTOR FREQUENCY

(Hz)

MOTOR CURRENT

(MUST-HOLD AMPS)

MOTOR NOMINAL

SPEED (RPM)

Motor Option Voltage Motor

P/N VFD

Carrier P/N VFD

Mfr P/N 003 006 120 122 123 124 125

STD 208/230 HD60FK657 HK30WA373 131L9798 [1] [102] [14] 230 60 21.2 1760

460 HD60FK657 HK30WA380 131L9867 [1] [122] [14] 460 60 9.7 1760 575 HD60FL576 HK30WA384 131N0229 [1] [132] [14] 575 60 7.2 1745

MID 208/230 HD62FK654 HK30WA374 131L9799 [1] [102] [15] 230 60 28.0 1760

460 HD62FK654 HK30WA381 131L9868 [1] [122] [15] 460 60 13.7 1760 575 HD62FL576 HK30WA384 131N0229 [1] [132] [15] 575 60 8.9 1750

HIGH 208/230 HD64FK654 HK30WA375 131L9800 [1] [102] [16] 230 60 37.3 1755

460 HD64FK654 HK30WA386 131L9869 [1] [122] [16] 460 60 16.9 1755 575 HD64FL576 HK30WA388 131N0233 [1] [132] [16] 575 60 12.6 1755

START DELAY (sec)

FLYING START

MIN SPEED FOR FUNCTION (Hz)

MOTOR THERMAL

PROTECTION PRESET REFERENCE

Motor Option Voltage 171 173 182 190 310 [0] 310 [1] 310 [2] 310 [3] 310 [4] 310 [5] 310 [6] 310 [7]

STD 208/230 2.0 [1] 1.0 [4] 0% 60.00% 72.00% 100% 100% 0% 0% 0%

460 2.0 [1] 1.0 [4] 0% 60.00% 72.00% 100% 100% 0% 0% 0% 575 2.0 [1] 1.0 [4] 0% 60.00% 72.00% 100% 100% 0% 0% 0%

MID 208/230 2.0 [1] 1.0 [4] 0% 60.00% 72.00% 100% 100% 0% 0% 0%

460 2.0 [1] 1.0 [4] 0% 60.00% 72.00% 100% 100% 0% 0% 0% 575 2.0 [1] 1.0 [4] 0% 60.00% 72.00% 100% 100% 0% 0% 0%

HIGH 208/230 2.0 [1] 1.0 [4] 0% 60.00% 72.00% 100% 100% 0% 0% 0%

460 2.0 [1] 1.0 [4] 0% 60.00% 72.00% 100% 100% 0% 0% 0% 575 2.0 [1] 1.0 [4] 0% 60.00% 72.00% 100% 100% 0% 0% 0%

RAMP UP TIME (sec)

RAMP DOWN TIME (sec)

CURRENT LIMIT

TERMINAL 18 DIGITAL INPUT

TERMINAL 19 DIGITAL INPUT

TERMINAL 27 DIGITAL INPUT

TERMINAL 29 DIGITAL INPUT

Motor Option Voltage 341 342 418 510 511 512 513

STD 208/230 10.00 10.00 100% [8] [16] [17] [18]

460 10.00 10.00 100% [8] [16] [17] [18] 575 10.00 10.00 100% [8] [16] [17] [18]

MID 208/230 10.00 10.00 100% [8] [16] [17] [18]

460 10.00 10.00 100% [8] [16] [17] [18] 575 10.00 10.00 100% [8] [16] [17] [18]

HIGH 208/230 10.00 10.00 100% [8] [16] [17] [18]

460 10.00 10.00 100% [8] [16] [17] [18] 575 10.00 10.00 100% [8] [16] [17] [18]

TERMINAL 53 LOW VOLTAGE

TERMINAL 53 HIGH VOLTAGE

TERMINAL 53 LOW REFERENCE

TERMINAL 53 HIGH REFERENCE

RESET MODE

AUTO. RESTART TIME (s)

RFI FILTER

Motor Option Voltage 610 611 614 615 1420 1421 1450

STD 208/230 2 [10] 0 [60] [3] 600 [0]

460 2 [10] 0 [60] [3] 600 [0] 575 2 [10] 0 [60] [3] 600 [0]

MID 208/230 2 [10] 0 [60] [3] 600 [0]

460 2 [10] 0 [60] [3] 600 [0] 575 2 [10] 0 [60] [3] 600 [0]

HIGH 208/230 2 [10] 0 [60] [3] 600 [0]

460 2 [10] 0 [60] [3] 600 [0] 575 2 [10] 0 [60] [3] 600 [0]

74

Smoke Detectors Smoke detectors are available as factory-installed options on 48LC 14-26 models. Smoke detectors may be specified for supply air only, for return air without or with economizer, or in combina- tion of supply air and return air. The unit is factory-configured for immediate smoke detector shutdown operation; additional wiring or modifications to units Integrated Staging Control (ISC) board may be necessary to complete the unit and smoke detector config- uration to meet project requirements. RETURN AIR SENSOR TUBE INSTALLATION The return air sampling tube is shipped in the units supply fan section, attached to the blower housing (see Fig. 82). Its operating location is in the return air section of the unit (see Fig. 83, unit without economizer, or Fig. 84, unit with economizer), inserted into the return air sensor module housing which protrudes through the back of the control box. To install the return air sensor sampling tube: 1. Remove the tube from its shipping location. 2. Open the unit end to access the return air sensor (located on

right-hand partition). 3. Orient the tubes sampling holes into the return air flow direc-

tion. For vertical application, position the sampling holes on the bottom of the tube, facing into the bottom return duct opening. For horizontal application, position the sampling holes on the side of the tube, facing the units end panel.

4. Insert the sampling tube into the return air sensor module until the tube snaps into position.

5. Replace end panel or outside air hood.

Fig. 82 Typical Supply Air Smoke Detector Sensor Location

Fig. 83 Return Air Sampling Tube Location in Unit without Economizer

Fig. 84 Return Air Sampling Tube Location in Unit with Economizer

SMOKE DETECTOR TEST MAGNET Locate the magnet; it is shipped in the control box area. ADDITIONAL APPLICATION DATA Refer to Factory Installed Smoke Detectors for Small and Me- dium Rooftop Units 2 to 25 Tons for discussions on additional control features of these smoke detectors including multiple unit coordination.

ROTA TIO

N

RETURN AIR SAMPLING TUBE (SHIPPING LOCATION)

RETURN AIR DETECTOR SAMPLING TUBE

RETURN AIR DETECTOR SAMPLING TUBE

75

Step 14 Install Accessories Available accessories include: Roof curb (must be installed before unit) EconoMi$er X (with controller) Power exhaust Outdoor enthalpy sensor Differential enthalpy sensor CO2 sensor Temperature and humidity sensors Louvered hail guard Phase monitor control

Refer to separate installation instructions for information on in- stalling these accessories. See Price Pages for a complete list of field-installed accessories.

Step 15 Check Belt Tension Measure the belt span length as shown in Fig. 85. Calculate the re- quired deflection by multiplying the belt span length by 1/64. For example, if the belt span length is 32 inches:

32 x 1/64 = 1/2-in. deflection. BELT FORCE DEFLECTION METHOD Check the belt tension with a spring-force belt force deflection gage (available from drive belt manufacturer). 1. Place a straightedge along the belt between the two pul-

leys. Measure the distance between the motor shaft and the blower shaft.

2. Set the tension gage to the desired tension (see Table 1 in Fig. 85). Place the large O-ring at that point.

3. Press the tension checker downward on the belt until the large O-ring is at the bottom of the straightedge.

4. Adjust the belt tension as needed. Adjust belt tension by loosing the motor mounting plate front bolts and rear bolt (see Fig. 86) and slide the plate towards the fan (to reduce tension) or away from the fan (to increase tension). Ensure the blower shaft and motor shaft are parallel to each other (pulleys aligned). Tighten all bolts securely when finished.

Fig. 85 V-Belt Force Label

BELT TENSION METHOD Requires belt tension gage that measures tension in belt in units of lbs force.

Fig. 86 Belt Drive Motor Mounting

TORQUE ALL SHEAVE SET SCREWS TO 110-130 in. lbs

SET SCREW

SET SCREW

STRAIGHT EDGE

BELT SPAN

BELT DEFLECTION FORCE - SEE TABLE 1

DEFLECTION = BELT SPAN 64

Table 1

Table 2

BELT CROSS

SECTION

SMALLEST SHEAVE

DIAMETER

BELT DEFLECTION FORCE (LBS) UNNOTCHED

BELTS NOTCHED BELTS

USED NEW USED NEW

A, AX 3.0-3.6 3.7 5.5 4.1 6.1 3.8-4.8 4.5 6.8 5.0 7.4 5.0-7.0 5.4 8.0 5.7 8.4

B, BX 3.4-4.2 4.9 7.2 4.4-5.6 5.3 7.9 7.1 10.5 5.8-8.6 6.3 9.4 8.5 12.6

BELT CONDITION TENSION FORCE IN BELT (LBS) New 100 Used 80

BLOWER PULLEY

V-BELT

MOTOR PULLEY

MOTOR

MOTOR MOUNTING PLATE

MOUNTING BOLTS (4)

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53480310-01 Printed in U.S.A. Form 48LC-14-26-07SI Pg 78 1-2021 Replaces: 48LC-14-26-06SI

2021 Carrier

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53480310-01 Printed in U.S.A. Form 48LC-14-26-07SI Pg CL-1 1-2021 Replaces: 48LC-14-26-06SI

UNIT START-UP CHECKLIST (Remove and Store in Job File)

I. PRELIMINARY INFORMATION MODEL NO. ____________________________________________

JOB NAME_____________________________________________

SERIAL NO. ____________________________________________

ADDRESS _____________________________________________

START-UP DATE________________________________________

TECHNICIAN NAME _____________________________________

ADDITIONAL ACCESSORIES

_____________________________________________________________________________________________________

II. PRE-START-UP Verify that all packaging materials have been removed from unit (Y/N) _____ Verify installation of duct pressure transducer (Y/N) _____ Verify installation of outdoor air hood (Y/N) _____ Verify installation of flue exhaust and inlet hood (Y/N) _____ Verify that condensate connection is installed per instructions (Y/N) _____ Verify that all electrical connections and terminals are tight (Y/N) _____ Verify gas pressure to unit gas valve is within specified range (Y/N) _____ Check gas piping for leaks (Y/N) _____ Check that indoor-air filters are clean and in place (Y/N) _____ Check that outdoor-air inlet screens are in place (Y/N) _____ Verify that unit is level (Y/N) _____ Check fan wheels and propeller for location in housing/orifice and verify setscrew is tight (Y/N) _____ Verify that fan sheaves are aligned and belts are properly tensioned (Y/N) _____ Verify that scroll compressors are rotating in the correct direction (Y/N) _____ Verify installation of thermostat (Y/N) _____ Verify that crankcase heaters have been energized for at least 24 hours (Y/N) _____

III. START-UP ELECTRICAL Supply Voltage L1-L2_____________ L2-L3_____________ L3-L1_____________ Compressor Amps 1 L1 _____________ L2 _____________ L3 _____________ Compressor Amps 2 L1 _____________ L2 _____________ L3 _____________ Supply Fan Amps L1 _____________ L2 _____________ L3 _____________

TEMPERATURES Outdoor-Air Temperature _____________ F DB (Dry Bulb) Return-Air Temperature _____________ F DB _____________ F WB (Wet Bulb) Cooling Supply Air Temperature _____________ F Gas Heat Supply Air Temperature _____________ F

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 preceding sec- tions of this Installation Instruction document.

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53480310-01 Printed in U.S.A. Form 48LC-14-26-07SI Pg CL-2 1-2021 Replaces: 48LC-14-26-06SI

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PRESSURES Gas Inlet Pressure _____________IN. WG Gas Manifold Pressure STAGE 1 _____________IN. WG

STAGE 2 _____________IN. WG Refrigerant Suction CIRCUIT A _____________ PSIG

CIRCUIT B _____________ PSIG Refrigerant Discharge CIRCUIT A _____________ PSIG

CIRCUIT B _____________ PSIG Verify Refrigerant Charge using Charging Charts (Y/N) _____

GENERAL Economizer minimum vent and changeover settings to job requirements (if equipped) (Y/N) _____ Verify smoke detector unit shutdown by utilizing magnet test (Y/N) _____

IV. HUMIDI-MIZER SYSTEM START-UP STEPS

1. Check CTB (Central Terminal Board) for jumper 1, 2, 3 (Jumper 1, 2, 3 must be cut and open) (Y/N) _____ 2. Open humidistat contacts (Y/N) _____ 3. Start unit In cooling (Close Y1) (Y/N) _____

OBSERVE AND RECORD A. Suction pressure _______________ PSIG B. Discharge pressure _______________ PSIG C. Entering air temperature _______________ F D. Liquid line temperature at outlet or reheat coil _______________ F E. Confirm correct rotation for compressor (Y/N) _____ F. Check for correct ramp-up of outdoor fan motor as condenser coil warms (Y/N) _____

4. Switch unit to high-latent mode (sub-cooler) by closing humidistat with Y1 closed (Y/N) _____ 5. Check unit charge per charging chart (Y/N) _____

OBSERVE A. Reduction in suction pressure (5 to 7 psi expected) (Y/N) _____ B. Discharge pressure unchanged (Y/N) _____ C. Liquid temperature drops to 50F to 55F range (Y/N) _____ D. LSV solenoid energized (valve closes) (Y/N) _____

6. Switch unit to dehumid (reheat) by opening Y1 (Y/N) _____

OBSERVE A. Suction pressure increases to normal cooling level (Y/N) _____ B. Discharge pressure decreases (35 to 50 psi) (Limited by head pressure control) (Y/N) _____ C. Liquid temperature returns to normal cooling level (Y/N) _____ D. LSV solenoid energized (valve closes) (Y/N) _____ E. DSV solenoid energized, valve opens (Y/N) _____