Contents

Carrier Aquazone 50PCH v2 Installation Instructions PDF

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Summary of Content for Carrier Aquazone 50PCH v2 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. 04-53500286-01 Printed in U.S.A. Form 50PC-C4SI Pg 1 4-21 Replaces: 50PC-C3SI

Installation, Start-Up, and Service Instructions

CONTENTS Page

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 GREENHOUSE GAS REGULATION . . . . . . . . . . . . . . 2 F-Gas Regulation (517/2014) . . . . . . . . . . . . . . . . . . . 2 PRE-INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Step 1 Check Jobsite . . . . . . . . . . . . . . . . . . . . . . . 2 Installation Guidelines (All Units) . . . . . . . . . . . . . . . 3 Step 2 Check Unit . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Step 3 Locate Unit . . . . . . . . . . . . . . . . . . . . . . . . . 7 Step 4 Mount the Unit . . . . . . . . . . . . . . . . . . . . . . . 7 Step 5 Check Duct System . . . . . . . . . . . . . . . . . . 8 Step 6 Install Condensate Drain . . . . . . . . . . . . . . 9 Step 7 Pipe Connections . . . . . . . . . . . . . . . . . . . . 9 Step 8 Wire Field Power Supply . . . . . . . . . . . . . 13 Step 9 Wire Control Connections . . . . . . . . . . . . 13 Step 10 Wire Field Controls . . . . . . . . . . . . . . . . . 19 PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 System Checkout . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Fan Motor Speeds/Changing Speeds . . . . . . . . . . . 23 START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Operating Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Scroll Compressor Rotation . . . . . . . . . . . . . . . . . . 25 Unit Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Flow Regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Flushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Antifreeze . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Cooling Tower/Boiler Systems . . . . . . . . . . . . . . . . 32 OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Power Up Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Condensate Drain Pans . . . . . . . . . . . . . . . . . . . . . . 32 Refrigerant System . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Fan Motors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Condensate Drain Cleaning . . . . . . . . . . . . . . . . . . . 33 Air Coil Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Condenser Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . 33 Checking System Charge . . . . . . . . . . . . . . . . . . . . . 34 Refrigerant Charging . . . . . . . . . . . . . . . . . . . . . . . . 34

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . .35 Thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35 Control Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35 Thermostatic Expansion Valves . . . . . . . . . . . . . . . .35 Disposal of Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37 50PCH 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 litera- ture, tags and labels attached to the unit, and other safety precau- tions that may apply. Improper installation, adjustment, alteration, service, mainte- nance, or use can cause explosion, fire, electrical shock or other conditions which may cause personal injury or property damage. Consult a qualified installer, service agency, or your distributor or branch for information or assistance. The qualified installer or agency must use factory-authorized kits or accessories when mod- ifying this product. Refer to the individual instructions packaged with the kits or accessories when installing. Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloth for brazing operations. Have fire extinguisher available. Read these instructions thoroughly and follow all warn- ings or cautions attached to the unit. Consult local building codes and the National Electrical Code (NEC, U.S.A.) for special instal- lation requirements. Understand the signal words DANGER, WARNING, and CAUTION. DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING signifies hazards that could result in personal injury or death. CAUTION is used to identify unsafe practices, which would result in minor per- sonal injury or product and property damage. 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.

IMPORTANT: Read the entire instruction manual before starting installation.

WARNING

Electrical shock can cause personal injury or death. Before installing or servicing system, always turn off main power to system. There may be more than one disconnect switch. Turn off accessory heater power if applicable.

Aquazone 50PCH 009-070

Compact Water Source Heat Pumps with Puron Refrigerant (R-410A) 50 Hz

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GENERAL This Installation and Start-Up Instructions literature is for Aquazone 50PC compact water source heat pump systems. Water source heat pumps (WSHPs) are single-package horizontal- ly and vertically mounted units with electronic controls designed for year-round cooling and heating.

Carrier Aquazone WSHPS are manufactured at: FHP Manufacturing, a Carrier Joint Venture 601 North West 65th Court, Ft. Lauderdale 33309 USA

GREENHOUSE GAS REGULATION

F-Gas Regulation (517/2014) This device utilizes a fluorinated greenhouse gas (F-gas), which is regulated under the EU F-Gas Regulation (517/2014). The her- metically sealed refrigerant circuit is factory charged with HFC- 410A refrigerant. Refrigerant charge amounts by unit size, global warming potential (GWP), and equivalent CO2 tonnage (t) can be found in Table 1 and on the unit label. The installer, building oper- ator, and service provider must conform to usage, handling, and record-keeping requirements as stated in the regulation.

PRE-INSTALLATION

Inspection Upon receipt of shipment, carefully check the shipment against the bill of lading. Make sure all units have been received. Inspect the carton or crating of each unit, and inspect each unit for damage on both the interior and exterior. Ensure the shipping company makes proper notation of any shortages or damage on all copies of the freight bill. Concealed damage not discovered during unloading must be re- ported to the shipping company within 5 days of receipt of ship- ment. NOTE: It is the responsibility of the purchaser to file all necessary claims with the shipping company.

Storage If the equipment is not needed for immediate installation upon its arrival at the job site, it should be left in its shipping carton and stored in a clean, dry area between 10C and 35C. Units must only be stored or moved in the normal upright position as indicat- ed by the UP arrows on each carton at all times. If unit stacking is re- quired, stack units as follows: vertical units less than 6 tons, no more than two high; horizontal units less than 6 tons, no more than three high. Do not stack units larger than 6 tons.

Handling All units are shipped secured to a wooden pallet with hardware. It is recommended to leave the unit secured to the wooden pallet un- til installation. Units secured to a pallet can be handled using a fork lift, pallet jack, material lift, hand truck, or other approved transportation method. Due to the weight of the WSHP units, it's recommended to have two or more people to assist with maneuvering the units. Units that are not secured to a pallet should only be maneuvered by a material lift with two or more people to assist with maneuver- ing the equipment.

INSTALLATION

Step 1 Check Jobsite Installation, operation and maintenance instructions are provided with each unit. Before unit start-up, read all manuals and become familiar with the unit and its operation. Thoroughly check out the system before operation. Complete the inspections and instruc- tions listed below to prepare a unit for installation. See Tables 2 and 3 for unit physical data.

WARNING

DO NOT USE TORCH to remove any component. System contains oil and refrigerant under pressure. To remove a component, wear protective gloves and goggles and proceed as follows:

a. Shut off electrical power to unit. b. Recover refrigerant to relieve all pressure from system

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

the work area should be well ventilated. Refrigerant in contact with an open flame produces toxic gases.

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

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

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

CAUTION

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

IMPORTANT: The installation of water source heat pump units and all associated components, parts, and accessories which make up the installation shall be in accordance with the regulations of ALL authorities having jurisdiction and MUST conform to all applicable codes. It is the responsibility of the installing contractor to determine and comply with ALL applicable codes and regulations.

Table 1 Refrigerant Charge and CO2 Equivalent

GLOBAL WARMING

POTENTIAL (GWP)

[kgCO2eq]

Model Refrigerant Charge (kg)

CO2 equivalent tonnage (t)

of refrigerant charge

2088

50PCH009 0.454 0.947 50PCH012 0.539 1.125 50PCH015 0.539 1.125 50PCH018 0.624 1.302 50PCH024 0.992 2.072 50PCH030 0.992 2.072 50PCH036 1.134 2.368 50PCH042 1.219 2.545 50PCH048 1.446 3.019 50PCH060 1.758 3.670 50PCH070 1.729 3.611

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The WSHP units are designed for indoor installation only. Be sure to allow adequate space around the unit for servicing. See Fig. 1 for overall unit dimensions. See Table 5 for corner weights information.

Installation Guidelines (All Units) 1. Be sure that the location chosen for unit installation provides

ambient temperatures maintained above freezing. 2. Be sure the installation location is isolated from sleeping

areas, private offices and other acoustically sensitive spaces.

3. Be sure unit is mounted at a height sufficient to provide an adequate slope of the condensate lines. If an appropriate slope cannot be achieved, a field-supplied condensate pump may be required.

4. On horizontal units, allow adequate room below the unit for condensate drain trap and do not locate the unit above supply piping.

5. Provide sufficient space for duct connection. Do not allow the weight of the ductwork to rest on the unit.

6. Provide adequate clearance for filter replacement and drain pan cleaning. Do not allow piping, conduit, etc. to block filter access.

7. Provide sufficient access to allow maintenance and servicing of the blow and blower motor, compressor and coils. Removal of the entire unit from the closet should not be nec- essary.

8. Provide an unobstructed path to the unit within the closet or mechanical room. Space should be sufficient to allow return air to freely enter the space.

9. Provide ready access to water valves and fittings, and screw- driver access to unit side panels, discharge collar, and all elec- trical connections.

10. Where access to side panels is limited, pre-removal of the control box side mounting screws may be necessary for future servicing.

Step 2 Check Unit Upon receipt of equipment at the jobsite, inspect the carton or crating of each unit, and inspect each unit for damage on both the interior and exterior. Note any damage and contact your local equipment sales office.

INSPECT UNIT

To prepare the unit for installation, complete the procedures listed below: 1. Verify that the correct unit has been received. Check the unit

capacity (tonnage), voltage, orientation, and configuration. 2. Compare the electrical data on the unit nameplate with to ver-

ify the jobsite power feed (voltage, amperage, MCA) and power protection (MOCP).

3. Verify that the unit is the correct model for the entering water temperature of the job (standard or extended range)

4. Remove the unit packaging, keeping the unit attached to the shipping pallet. Do not destroy packaging. Save for re-instal- lation on the unit if the unit will not be fully installed.

5. Open a unit access panel. Verify that the refrigerant tubing is free of kinks or dents, and that it does not touch other unit components.

6. Check the water piping and piping connections to make sure they are free from defects, kinks, dents, and appear to be water tight. Verify system operating water pressure.

7. Inspect the blower assembly. Verify that the blower has not come lose during shipping. Verify clearance between the blower wheel and the blower housing. Verify free blower rotation.

8. Inspect all electrical connections. Be sure connections are clean and tight at the terminals.

9. Check unit controls. If Better B, Complete C, or Deluxe D, verify field provided thermostat is available. If WSHP Open, verify proper sensor has been provided and a commissioning interface will be available.

10. 50PCH Only - Locate the hanging bracket kit located in the compressor compartment.

11. Remove the foam blower shipping support from underneath the blower section.

12. Remove any shipping brackets from the unit.

If the refrigerant charge is adjusted from the factory charge levels, it must be noted on the unit label and in related documentation as required by EU Regulation (517/2014).

CAUTION

To avoid equipment damage, do not use these units as a source of heating or cooling during the construction pro- cess. The mechanical components and filters used in these units quickly become clogged with construction dirt and debris which may cause system damage.

CAUTION

DO NOT store or install units in corrosive environments or in locations subject to temperature or humidity extremes (e.g., attics, garages, rooftops, etc.). Corrosive conditions and high temperature or humidity can significantly reduce performance, reliability, and service life. Always move units in an upright position. Tilting units on their sides may cause equipment damage.

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Table 2 Physical Data 50PCH (009-070) Units ETL Rated

LEGEND

50PCH UNIT 009 012 015 018 024 030 COMPRESSOR (1 each) Rotary Rotary Rotary Rotary Scroll Scroll Maximum Water Working Pressure (kPa) 2758 2758 2758 2758 2758 2758 FAN MOTOR AND BLOWER

Fan Motor Type/Speeds PSC/3 PSC/3 PSC/3 PSC/3 PSC/3 PSC/3 Fan Motor (W) 75 75 124 186 186 186 Blower Wheel Size (Dia x W) (mm) 114.3 x 114.3 139.7 x 114.3 228.6 x 177.8 228.6 x 177.8 228.6 x 177.8 228.6 x 177.8

WATER CONNECTION SIZE FPT (mm) 19.05 19.05 19.05 19.05 19.05 19.05 Coaxial Coil Volume (L) 0.30 0.30 0.34 0.54 0.91 0.91

HORIZONTAL CABINET Refrigeration Charge (kg) 0.54 0.54 0.54 0.62 0.99 0.99 Air Coil Dimensions (cm) (H x W) 254 x 356 254 x 356 305 x 419 406 x 419 406 x 521 406.4 x 521 Standard Filter - 1 in. Throwaway (cm)

(L x H) 254 x 406 x 25.4 254 x 406 x 25.4 406 x 508 x 25.4 406 x 508 x 25.4 406 x 635 x 25.4 406 x 635 x 25.4

Weight - Operating (kg) 48 48 62 79 82 86 Weight - Shipping (kg) 61 61 72 94 96 102

50PCH UNIT 036 042 048 060 070 COMPRESSOR (1 each) Scroll Scroll Scroll Scroll Scroll Maximum Water Working Pressure (kPa) 2758 2758 2758 2758 2758 FAN MOTOR AND BLOWER

Fan Motor Type/Speeds PSC/3 PSC/3 PSC/3 PSC/3 PSC/3 Fan Motor (W) 373 373 559 559 559 Blower Wheel Size (Dia x W) (mm) 228.6 x 177.8 254 x 203.2 254 x 203.2 254 x 228.6 279.4 x 228.6

WATER CONNECTION SIZE FPT (mm) 19.05 19.05 25.4 25.4 25.4 Coaxial Coil Volume (L) 1.04 1.04 1.85 2.33 2.33

HORIZONTAL CABINET Refrigeration Charge (kg) 1.13 1.22 1.45 1.76 1.73 Air Coil Dimensions (cm) (H x W) 457 x 699 457 x 699 508 x 813 508 x 813 508 x 1067 Standard Filter - 1 in. Throwaway (cm)

(L x H) 457.2 x 762 x 25.4 457 x 762 x 25.4 508 x 876 x 25.4 508 x 876 x 25.4 508 x 610 x 25.4 (2)

Weight - Operating (kg) 103 105 124 131 143 Weight - Shipping (kg) 123 120 136 144 166

FPT Female Pipe Thread PSC Permanent Split Capacitor

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Table 3 Physical Data 50PCH (009-070) Units CE Rated

LEGEND

* A-weighted [<80dB(A)] casing radiated sound power level, cooling mode.

50PCH UNIT 009 012 015 018 024 030 COMPRESSOR (1 each) Rotary Rotary Rotary Rotary Scroll Scroll Maximum Water Working Pressure (kPa) 2758 2758 2758 2758 2758 2758 PSC FAN MOTOR AND BLOWER

Fan Motor Type/Speeds PSC/3 PSC/3 ECM ECM ECM ECM Fan Motor (W) 75 75 249 249 249 249 Blower Wheel Size (Dia x W) (mm) 114.3 x 114.3 139.7 x 114.3 228.6 x 177.8 228.6 x 177.8 228.6 x 177.8 228.6 x 177.8

WATER CONNECTION SIZE FPT (mm) 19.05 19.05 19.05 19.05 19.05 19.05 Coaxial Coil Volume (L) 0.30 0.30 0.34 0.54 0.91 0.91

HORIZONTAL CABINET Refrigeration Charge (kg) 0.54 0.54 0.54 0.62 0.99 0.99 Air Coil Dimensions (H x W) 254 x 356 254 x 356 305 x 419 406 x 419 406 x 521 406.4 x 521 Standard Filter - 1 in. Throwaway

(L x H) 254 x 406 x 25.4 254 x 406 x 25.4 406 x 508 x 25.4 406 x 508 x 25.4 406 x 635 x 25.4 406 x 635 x 25.4

Weight - Operating (kg) 48 48 62 79 82 86 Weight - Shipping (kg) 61 61 72 94 96 102

50PCH UNIT 036 042 048 060 070 COMPRESSOR (1 each) Scroll Scroll Scroll Scroll Scroll Maximum Water Working Pressure (kPa) 2758 2758 2758 2758 2758 PSC FAN MOTOR AND BLOWER

Fan Motor Type/Speeds ECM ECM ECM ECM ECM Fan Motor (W) 373 559 559 746 746 Blower Wheel Size (Dia x W) (mm) 228.6 x 177.8 254 x 203.2 254 x 203.2 254 x 228.6 279.4 x 228.6

WATER CONNECTION SIZE FPT (mm) 19.05 19.05 25.4 25.4 25.4 Coaxial Coil Volume (L) 1.04 1.04 1.85 2.33 2.33

HORIZONTAL CABINET Refrigeration Charge (kg) 1.13 1.22 1.45 1.76 1.73 Air Coil Dimensions (H x W) 457 x 699 457 x 699 508 x 813 508 x 813 508 x 1067 Standard Filter - 1 in. Throwaway

(L x H) 457.2 x 762 x 25.4 457 x 762 x 25.4 508 x 876 x 25.4 508 x 876 x 25.4 508 x 610 x 25.4 (2)

Weight - Operating (kg) 103 105 124 131 143 Weight - Shipping (kg) 123 120 136 144 166

ECM Electronically Commutated Motor FPT Female Pipe Thread PSC Permanent Split Capacitor

Table 4 Sound Power (A-Weight) - All Units

50PCH UNIT 009 012 015 018 024 030 036 042 048 060 070 Sound Power* 60.0 59.0 60.2 58.0 59.0 61.0 60.0 63.0 59.0 61.0 68.7

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Fig. 1 50PCH009-070 Unit Dimensions

Electrical Knock-Outs

Compressor Access

D Return Air Opening

Return Air Opening

Condensate Drain

E

R F T

H G

A

N

Q

B

C

N

A

M

K J

B

C

P K

Condensate Drain

Left Hand Return End Blow Left Hand Return NOTE: Models 048 and 060 Left Hand Return units have condenser Straight Through water connections on the front right and electrical knockouts on the front left.

AIR COIL

Blower

Blower Access 457.2 mm Minimum 609.6 mm Optimum

Compressor Access and Control Access

Compressor

Electrical Control

Box

Right Hand Return End Blow Right Hand Return Straight Through

Service Clearances

Return Air Opening

Condensate Drain

Return Air Opening

F RT

D

E Q

N K

J

A B

C

N

B

M K

P

A

C

Condenser Water In

Condenser Water Out

Condensate Drain

457.2 mm Minimum 914.4 mm Optimum

NOTES: 1. All dimensions are metric (mm) unless stated otherwise. 2. All condensate drain connections are 3/4 in. FPT. 3. Specifications subject to change without notice.

4. The 25.4 mm filter rack extends 31.24 mm beyond the side of the unit. The 50.8 mm filter rack extends 73.4 mm beyond the side of the unit. The 50.8 mm filter rack is 4-sided with a filter access door on one end and can accept either a 25.4 mm or 50.8 mm filter.

50PCH UNIT SIZE

A B C D E F G H J K M N P Q R T CONDENSER

WATER CONNECTIONS

FPT (in.)

RECOMMENDED REPLACEMENT NOM-

INAL FILTER SIZEWIDTH DEPTH HEIGHT

CAB END TO FILTER RACK

R/A DUCT WIDTH

CAB FRONT

TO FILTER RACK

WATER INLET

WATER OUTLET

SIDE TO

DISC. (END)

DISC. WIDTH

TOP TO

DISC. (FLE & FRS)

DISC. HEIGHT

END TO

DISC.

TOP TO

DISC. (FRE & FLS)

FILTER RACK

HEIGHT

R/A DUCT

FLANGE HEIGHT

009 482.6 838.2 292.1 38.1 410.21 389.89 60.45 241.30 136.53 160.02 151.64 104.14 123.83 35.81 287.0 218.4 3/4 FPT 254 x 406.4 x 25.4 012 482.6 838.2 292.1 38.1 410.21 389.89 60.45 241.30 133.35 163.32 160.27 104.14 120.65 28.96 287.0 218.4 3/4 FPT 254 x 406.4 x 25.4 015 558.8 1092.2 431.8 38.1 511.81 542.29 72.64 381.00 207.01 163.32 242.57 104.14 194.31 86.36 426.7 381.0 3/4 FPT 406.4 x 508 x 25.4 018 558.8 1092.2 431.8 38.1 511.81 542.29 72.64 358.90 137.67 231.90 155.19 245.11 124.97 31.24 426.7 381.0 3/4 FPT 406.4 x 508 x 25.4 024 558.8 1092.2 457.2 38.1 635.00 419.10 72.64 358.90 137.67 231.90 155.19 245.11 124.97 31.24 426.7 381.0 3/4 FPT 406.4 x 635 x 25.4 030 558.8 1092.2 457.2 38.1 635.00 419.10 62.74 381.00 137.67 231.90 155.19 245.11 124.97 31.24 426.7 381.0 3/4 FPT 406.4 x 635 x 25.4 036 558.8 1384.3 482.6 38.1 765.81 580.39 72.64 409.70 164.34 231.90 190.50 261.11 151.64 30.73 477.5 431.8 3/4 FPT 457.2 x 762 x 25.4 042 558.8 1384.3 482.6 38.1 765.81 580.39 72.64 409.70 133.86 265.43 164.08 287.02 121.16 30.99 477.5 431.8 3/4 FPT 457.2 x 762 x 25.4 048 635.0 1384.3 533.4 38.1 878.84 467.36 72.64 470.41 184.15 265.43 189.48 288.54 171.45 54.86 528.3 482.6 1 FPT 508 x 876.3 x 25.4 060 635.0 1384.3 533.4 38.1 878.84 467.36 72.64 470.41 160.53 298.70 172.97 317.50 147.83 42.67 528.3 482.6 1 FPT 508 x 876.3 x 25.4 070 635.0 1651.0 533.4 38.1 1221.74 391.16 72.64 470.41 160.53 298.70 172.97 317.50 147.83 42.67 528.3 482.6 1 FPT 508 x 609.6 x 25.4 (2)

LEGEND R/A Return Air

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Table 5 50PCH009-070 Corner Weights (kg)

* Front is counter box end.

Step 3 Locate Unit Locate the unit in an indoor area that allows easy removal of the filter and access panels, and has enough room for service person- nel to perform maintenance or repair. Provide sufficient room to make fluid, electrical, and duct connection(s). If the unit is located in a confined space such as a closet, provisions must be made for return air to freely enter the space. Unit condensate drains are not internally trapped. Allow room be- low the unit base for horizontal and counterflow models for an ad- equate condensate trap. These units are not approved for outdoor installation; therefore, they must be installed inside the structure being conditioned. Do not locate units in areas that are subject to freezing. Units must be installed in conditioned space that is not subject to extremes of temperature or humidity to avoid cabinet sweating and/or equip- ment damage. Do not use units for temporary heating, air conditioning or ventila- tion during construction, especially when plastering, sanding or painting. Care should be taken to avoid introduction of dust, paint or debris into the air coil.

PROTECTION

Once the units are properly positioned on the jobsite, cover them with either a shipping carton, vinyl film, or an equivalent protec- tive covering. Cap open ends of pipes stored on the jobsite. This precaution is especially important in areas where painting, plaster- ing, or spraying of fireproof material, etc. is not yet complete. For- eign material that accumulates within the units can prevent proper start-up and require costly clean-up operations. Before installing any of the system components, be sure to examine each pipe, fit- ting, and valve, and remove any dirt or foreign material found in or on these components.

Step 4 Mount the Unit DUCT FLANGES

The 50PC heat pumps feature fold-out return and supply air duct flanges. These fold-out flanges allow the heat pumps to more easi- ly fit through doorways and other tight spaces, and also prevent damage in shipping and handling. It is recommended that all fold-out flanges be folded out once the heat pump is installed to ensure that return and supply airflow is not obstructed. These flanges can be easily folded using standard or duckbill pliers. Once folded out these flanges can be used to support light ductwork loads. To reduce sound transmission, units should be installed using flex- ible electrical conduit and hose kits. Care should be taken to

ensure that no part of the unit cabinet is touching part of the build- ing structure. For ducted return applications, a flexible duct con- nection should be used.

HORIZONTAL UNITS

While horizontal units may be installed on any level surface strong enough to hold their weight, they are typically suspended above a ceiling by threaded rods. The rods are usually attached to the unit corners by hanging bracket kits. See Fig. 2. The rods must be se- curely anchored to the ceiling.

Fig. 2 Hanger Bracket

Horizontal units installed above the ceiling must conform to all lo- cal codes. An auxiliary drain pan if required by code, should be at least 102 mm larger than the bottom of the heat pump. Plumbing connected to the heat pump must not come in direct contact with joists, trusses, walls, etc. Some applications require an attic floor installation of the horizontal unit. In this case the unit should be set in a full size secondary drain pan on top of a vibra- tion absorbing mesh. The secondary drain pan prevents possible condensate overflow or water leakage damage to the ceiling. The secondary drain pan is usually placed on a plywood base isolated from the ceiling joists by additional layers of vibration absorbing mesh. In both cases, a 19 mm drain connected to this secondary pan should be run to an eave at a location that will be noticeable.

UNIT SIZE TOTAL (kg)

LEFT HAND EVAPORATOR RIGHT HAND EVAPORATOR

LEFT FRONT* RIGHT FRONT* LEFT BACK RIGHT BACK LEFT FRONT* RIGHT FRONT* LEFT BACK RIGHT BACK

009 47 13 11 12 12 11 13 12 12

012 48 13 11 12 12 11 13 12 12

015 58 16 13 15 13 13 16 13 15

018 80 26 16 22 17 16 26 17 22

024 82 26 17 22 17 17 26 17 22

030 88 28 18 23 19 18 28 19 23

036 108 32 22 30 24 22 32 24 30

042 105 32 21 29 23 21 32 23 29

048 122 39 27 28 27 27 39 27 28

060 131 40 29 31 30 29 40 30 31

070 143 44 32 35 32 32 44 32 35

8

Hanging Bracket Assembly All horizontal units come with a hanging bracket kit to facilitate suspended unit mounting using threaded rod. Hanging brackets are to be installed as shown in Fig. 3.

Fig. 3 Hanging Bracket Locations

This kit includes the following: (5) Brackets (5) Rubber vibration isolators (8) Screws #10 x 1/2 in. (10) Bolts 1/4 - 28 x 1/2 in. hex bolt (not used on this model)

The following are needed and are to be field provided: Threaded rod (3/8 in. max dia) Hex Nuts Washers (13/4 in. min OD)

1. Remove and discard factory-provided screws from location where hanging brackets will be installed as shown in Fig. 4.

Fig. 4 Remove Factory-Provided Screws

2. Mount four brackets to unit corner post using the bolts pro- vided in the kit as shown in Fig. 5.

Fig. 5 Bracket Mounting

3. Install rubber grommet on the bracket as shown in Fig. 6.

4. Hang the unit and assemble the field provided thread rod, nuts and washers on to the brackets as shown in Fig. 6.

Fig. 6 Unit Hanging

To reduce sound transmission, units should be installed using flex- ible electrical conduit and hose kits. Care should be taken to en- sure that no part of the unit cabinet is touching part of the building structure. For ducted return applications, a flexible duct connec- tion should be used.

Step 5 Check Duct System All units are provided with a return air duct flange and supply air duct connections. Refer to unit dimensional drawings (Fig. 1) for physical dimensions of the collar and flange. A flexible connector is recommended for supply and return air duct connections on metal duct systems. All metal ducting should be insulated with a minimum of 25 mm duct insulation to avoid heat loss or gain and prevent condensate from forming during the cooling operation. Application of the unit to uninsulated ductwork is not recommended as the units performance will be adversely affected. If the unit will be installed in a new installation with new ductwork, the installation should be designed using current ASHRAE (American Society of Heating, Refrigerating, and Air- Conditioning Engineers) procedures for duct sizing. If the unit will be connected to an existing duct system, a check should be made to assure that the duct system has the capacity to handle the air required for the unit application. If the duct system is too small,

CAUTION

If the unit is located in a crawl space, the bottom of the unit must be at least 101.6 mm above grade to prevent flooding of the electrical parts due to heavy rains.

WARNING To avoid possible injury or death due to faulty installation do not reuse screws removed from the unit on Step 1 to mount the hanging brackets to the unit.

Hanging Brackets Locations WARNING

To avoid possible injury or death due to faulty installation fol- low all applicable code requirements when hanging this unit.

WARNING

To avoid possible injury or death due to faulty installation rods must be securely anchored to the ceiling.

9

larger ductwork must be installed. Be certain to check for and repair existing leaks and repair. The duct system and all diffusers should be sized to handle the designed airflow quietly. To maximize sound attenuation of the unit blower, the supply and return air plenums should be insulated. There should be no direct straight air path through the air grille into the heat pump. The return air inlet to the heat pump must have at least one 90-degree turn away from the space return air grille. If air noise or excessive airflow are a problem, the blower speed can be changed to a lower speed to reduce airflow.

HORIZONTAL SUPPLY AIR CONFIGURATION CONVERSION

The supply air location on horizontal units can be quickly field converted from end blow to straight through or vice-versa. To con- vert the supply air direction, follow the steps below: 1. If connected to power, shut off the unit and disconnect switch

or circuit breaker. 2. Unscrew and remove the blower access panel.

3. Disconnect the wires from the unit electrical box to the blower motor. Note which speed taps are wired for units.

4. Unscrew and carefully remove the blower panel with the blower and motor attached. Be careful not to damage the refrigerant coils or any other internal unit components.

5. Remove the blower support brackets from the bottom of the blower housing and relocate them to the top of the blower housing.

6. Turn the blower panel 180 degrees so that the blower support brackets are now at the bottom of the blower.

7. Insert the blower panel with the blower and motor into the desired location. Be careful not to damage the refrigerant coils or any other internal unit components. Screw the panel into place.

8. Replace the wires between the blower motor and electrical box. Make sure to connect wires to the proper speed taps.

9. Replace the blower access panel.

10. Reconnect power to the unit.

Step 6 Install Condensate Drain A drain line must be connected to the heat pump and pitched away from the unit a minimum of 2 cm/m to allow the condensate to flow away from the unit. This connection must be in conformance with local plumbing codes. A trap must be installed in the condensate line to ensure free condensate flow. (Heat pumps are not internally trapped.) A vertical air vent is sometimes required to avoid air pockets. See Fig. 7.

Fig. 7 Condensate Drain

The depth of the trap depends on the amount of positive or nega- tive pressure on the drain pan. A second trap must not be included. The horizontal unit should be pitched approximately 6 mm to- wards the drain in both directions, to facilitate condensate remov- al. (See Fig. 8.)

Fig. 8 Pitched Unit

Step 7 Pipe Connections Depending on the application, there are 3 types of WSHP piping systems to choose from: water loop, ground-water and ground loop. Refer to Piping Section of Carrier System Design Manual for additional information. All WSHP units use low temperature soldered female pipe thread fittings for water connections to prevent annealing and out-of- round leak problems which are typically associated with high temperature brazed connections. Refer to Tables 2 and 3 for connection sizes. When making piping connections, consider the following: Use a backup wrench when making screw connections to

unit to prevent internal damage to piping. Insulation may be required on piping to avoid condensa-

tion in the case where fluid in loop piping operates at tem- peratures below dew point of adjacent air.

Piping systems that contain steel pipes or fittings may be subject to galvanic corrosion. Dielectric fittings may be used to isolate the steel parts of the system to avoid galvanic corrosion.

PIPING

Supply and return piping must be as large as the unit connections on the heat pump (larger on long runs). Never use flexible hoses of a smaller inside diameter than that of the water connections on the unit. The 50PC units are supplied with either a copper or optional cupro-nickel condenser. Copper is adequate for ground water that is not high in mineral content. Refer to water quality guidelines. In conditions anticipating moderate scale formation or in brackish water a cupro-nickel heat exchanger is recommended. Both the supply and discharge water lines will sweat if subjected to low wa- ter temperature. These lines should be insulated to prevent damage from condensation. All manual flow valves used in the system must be ball valves. Globe and gate valves must not be used due to high pressure drop and poor throttling characteristics. Always check carefully for wa- ter leaks and repair appropriately. Units are equipped with female pipe thread fittings. Consult the specification sheets for sizes. Teflon1 tape sealer should be used when connecting water piping connections to the units to ensure against leaks and possible heat exchanger fouling. Do not overtighten the connections. Flexible hoses should be used between the unit and the rigid system to avoid possible vibration. Ball valves should be installed in theTRAP DOWN

50.8 mm MIN.

SLOPE DOWN MIN. 2 cm/m

CONDENSATE DRAIN CONNECTION

VENT (OPTIONAL)

1. Teflon is a registered trademarks of DuPont.

ELEVATION LINE

WHEN MOUNTED LEVEL 6.35 mm

10

supply and return lines for unit isolation and unit water flow balancing. Pressure/temperature ports are recommended in both the supply and return lines for system flow balancing. The water flow can be accurately set by measuring the water-to-refrigerant heat ex- changers water side pressure drop. See the unit specification sheets for the water flow and pressure drop information.

WATER LOOP APPLICATIONS

Water loop applications usually include a number of units plumbed to a common piping system. Maintenance to any of these units can introduce air into the piping system. Therefore, air elimination equipment comprises a major portion of the me- chanical room plumbing. For proper maintenance and servicing, pressure-temperature (P/ T) ports are necessary for temperature and flow verification. In addition to complying with any applicable codes, consider the following for system piping: Piping systems using water temperatures below 10C re-

quire 12.7 mm closed cell insulation on all piping sur- faces to eliminate condensation.

Avoid all plastic to metal threaded fittings due to the po- tential to leak. Use a flange fitted substitute.

Teflon tape thread sealant is recommended to minimize internal fouling of the heat exchanger.

Use backup wrench. Do not overtighten connections. Route piping to avoid service access areas to unit. Flush the piping system prior to operation to remove dirt

and foreign materials from the system. To assure adequate cooling and heating performance, the cool- ing tower and boiler water loop temperature should be main- tained between 10C and 23.9C in the heating mode and 15.6C and 43.3C in the cooling mode. In the cooling mode, heat is rejected from the unit into the water loop. A cooling tow- er provides evaporative cooling to the loop fluid, thus maintain- ing a constant supply temperature to the unit. When utilizing an open cooling tower, chemical water treatment is mandatory to ensure the water is free of corrosive materials. A secondary heat exchanger (plate frame between the unit and the open cooling tower) may also be used. In the heating mode, heat is absorbed from the water loop to the unit. A boiler can be utilized to maintain the loop within the proper temperature range. No unit should be connected to the supply or return piping until the water system has been completely cleaned and flushed to re- move dirt, piping chips or other foreign material. Supply and

return hoses should be connected together during this process to ensure the entire system is properly flushed. After the cleaning and flushing has taken place the unit may be connected to the water loop and should have all valves wide open. See Fig. 9. NOTE: It is imperative that all air is eliminated from the closed loop side of the heat exchanger to prevent condenser fouling.

GROUND-LOOP APPLICATIONS

In addition to complying with any applicable codes, consider the following for system piping: Limit piping materials to only polyethylene fusion in the

buried sections of the loop. Do not use galvanized or steel fittings at any time due to

corrosion. Avoid all plastic to metal threaded fittings due to the po-

tential to leak. Use a flange fitted substitute. Do not overtighten connections. Route piping to avoid service access areas to unit. Use pressure-temperature (P/T) plugs to measure flow

of pressure drop.

GEOTHERMAL CLOSED LOOP SYSTEMS

Operation of a 50PC Series unit on a closed loop application re- quires the extended range option. NOTE: Closed loop and pond applications require specialized design knowledge. No attempt at these installations should be made unless the dealer has received specialized training. Utilizing Ground Loop Pumping Package (GLP) makes the in- stallation easy. Anti-freeze solutions must be utilized when low loop temperatures are expected to occur. Refer to the installa- tion manuals for more specific instructions. See Fig. 10.

OPEN WELL WATER SYSTEMS

When a water well is used exclusively for supplying water to the heat pump, the pump should operate only when the heat pump operates. A 24-volt, double pole single throw (DP/ST) contactor can be used to operate the well pump with the heat pump. When two or more units are supplied from one well, the pump can be wired to operate independently from either unit. Two 24-volt double pole single throw relays wired in parallel are required. The discharge water from the heat pump is not contaminated in any manner and can be disposed of in various ways depending on local codes (i.e., discharge well, dry well, storm sewer, drain field, stream, pond, etc.). See Fig. 11.

11

Fig. 9 Cooling/Boiler Application

Fig. 10 Earth Coupled Application

9

2

1

3

4

8

5

7

6

COOLING TOWER/BOILER APPLICATION

LINE VOLTAGE DISCONNECT LOW VOLTAGE CONTROL CONNECTION P/T PLUGS (Optional) HOSE KITS BALL VALVES SUPPLY AND RETURN LINES OF CENTRAL SYSTEM FLEX DUCT CONNECTION HANGING BRACKETS ASSEMBLY THREADED ROD

1. 2. 3. 4. 5. 6. 7. 8. 9.

12

Fig. 11 Well Water Applications

INSTALLATION OF SUPPLY AND RETURN HOSE KIT

Follow these piping guidelines: 1. Install a drain valve at the base of each supply and return riser

to facilitate system flushing. 2. Install shutoff/balancing valves and unions at each unit to per-

mit unit removal for servicing.

3. Place strainers at the inlet of each system circulating pump.

4. Select the proper hose length to allow slack between connec- tion points. Hoses may vary in length by +2% to 4% under pressure.

5. Refer to Table 6. Do not exceed the minimum bend radius for the hose selected. Exceeding the minimum bend radius may cause the hose to collapse, which reduces water flow rate. Install an angle adapter to avoid sharp bends in the hose when the radius falls below the required minimum.

NOTE: Piping must comply with all applicable codes.

Table 6 Metal Hose Minimum Bend Radii

Insulation is not required on loop water piping except where the piping runs through unheated areas or outside the building or when the loop water temperature is below the minimum expected

dew point of the pipe ambient. Insulation is required if loop water temperature drops below the dew point.

Pipe joint compound is not necessary when Teflon threaded tape is pre-applied to hose assemblies or when flared-end connections are used. If pipe joint compound is preferred, use compound only in small amounts on the male pipe threads of the fitting adapters. Prevent sealant from reaching the flared surfaces of the joint. NOTE: When anti-freeze is used in the loop, assure that it is com- patible with Teflon tape or pipe joint compound employed. Maximum allowable torque for brass fittings is 40.1 Nm. If a torque wrench is not available, tighten finger-tight plus one quar- ter turn. Tighten steel fittings as necessary. Optional pressure-rated hose assemblies designed specifically for use with Carrier units are available. Similar hoses can be obtained from alternate suppliers. Supply and return hoses are fitted with swivel-joint fittings at one end to prevent kinking during installation.

HOSE DIAMETER (mm) MINIMUM BEND RADII (mm) 12.7 63.5 19.1 101.6 25.4 139.7

IMPORTANT: Do not bend or kink supply lines or hoses.

CAUTION

Backup wrench is required when tightening water connections to prevent water line damage. Failure to use a backup wrench could result in equipment damage.

13

Male adapters secure hose assemblies to the unit and risers. Install hose assemblies properly and check them regularly to avoid sys- tem failure and reduced service life. See Fig. 12.

Fig. 12 Supply/Return Hose Kit

Step 8 Wire Field Power Supply See Fig. 14-17 for typical wiring diagrams. See Tables 7-11 for additional electrical data.

HIGH VOLTAGE

All field installed wiring must comply with the following regula- tions and requirements: The responsible power supply company's local regulations

and requirements, including any corresponding special rules

National building regulations EN 60335 (Electrical appliances and similar utilities -

Safety) - Part 1 (General demands) - Part 2-40 (Special demands on electrical heat pumps, air

conditioners and air dehumidifiers)

EN 12828 (Heating systems in buildings - Design and in- stallation of water-based heating systems)

All field wiring should be installed by qualified and trained personnel. Refer to the unit wiring diagram for field connection requirements.

Power wiring to the heat pump should be enclosed in flexible conduit to minimize the transmission of vibration from the unit cabinet to the building. The power is connected to the line (L) side of the compressor contactor and the ground lug in the unit electrical box.

Step 9 Wire Control Connections All thermostat wiring is connected to a terminal block located in the unit electrical box. Refer to the unit wiring diagram for connection details.

All 50PC 50Hz units can be controlled using the included thermostat inputs (R, O, Y1, C, G) for single stage heat pump thermostat or field-installed DDC (Direct Digital Controls) controls. Note that the reversing valve on the unit is energized when the unit is in the cooling mode. See Fig. 13 for typical thermostat connections.

Fig. 13 Typical Thermostat Connections

The 50PC heat pump can be controlled by most commonly available single stage heat pump thermostats. The reversing valve on the 50PC Series unit is energized when the unit is in the cooling mode. Thermostats should be located on an interior wall away from supply ducts. Avoid locations subject to direct sunlight or drafts, or external walls. Thermostat wiring should be 1 mm. Refer to the installation instructions for the thermostat for further details.

The VA capacity of the transformer should be considered when connecting low voltage accessories to the heat pump such as ther- mostats or solenoid valves. Table 7 shows the VA draw of factory-mounted components in the 50PC heat pump. The total VA draw of the heat pump internal components plus any attached accessories must be lower than the VA capacity of the unit control transformer.

WARNING

To avoid possible injury or death due to electrical shock, open the power supply disconnect switch and secure it in an open position during installation.

CAUTION

All power connections must be properly torqued to avoid the risk of overheating.

CAUTION

Operating the unit below the minimum voltage, above the maximum voltage or with incorrect phasing can result in poor system performance or damage to the heat pump.

Rib Crimped

Length (609.6 mm Length Standard)

Swivel Brass Fitting

Brass Fitting

MPT

WARNING

To avoid possible injury or death due to electrical shock, never route control wiring through the same conduit as power sup- ply wiring. Never route control wiring through the same conduit as power supply wiring. Electrical noise and transients from the power wiring can cause communication issues or damage to the con- trol wiring and connected control components.

CAUTION

Never route control wiring through the same conduit as power supply wiring. Electrical noise and transients from the power wiring can cause communication issues or damage to the con- trol wiring and connected control components.

IMPORTANT: Exceptionally long runs of thermostat wire should be avoided to prevent voltage drops in the control circuit.

C O Y R G

14

Table 7 Low Voltage VA Draw

Table 8 C Board Factory Default Settings

Table 9 C Board DIP Switch Default Position

WARNING

Exceeding the transformer capacity can result in low control voltage, erratic unit operation or damage to the heat pump.

STANDARD CONSTRUCTION Component VA

Blower Relay 6-7 Reversing Valve Solenoid 8-9

Compressor Contactor 6-8 Unit Protection Module (UPM) 2

Total VA draw 22-26

FACTORY DEFAULT SETTINGS Temperature 3.3C

Lockout 2 Reset Y Alarm Pulse Test No

DIP SWITCH DEFAULT POSITION

Lockout 4 2

Reset R Y

Alarm Cont Pulse

Test Yes No

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19

Table 10 50PCH (015-070) Unit with ECM Motor Electrical Data

LEGEND

Table 11 50PCH (015-070) Unit with PSC Motor Electrical Data

LEGEND

Step 10 Wire Field Controls

SAFETY DEVICES AND UNIT PROTECTION MODULE (UPM)

Each unit is factory provided with a UPM that controls the com- pressor operation and monitors the safety. See Fig. 18 and 19. General The 50PC Series heat pumps are designed to be controlled by a standard 1 heat / 1 cool heat pump thermostat. The heat pump con- trol circuit operates on 24 VAC control voltage regardless of the unit supply voltage.

Fan operation is controlled by the G terminal on the heat pump thermostat terminal block. When G is energized the unit fan mo- tor will start operating. Compressor operation is controlled by the Y terminal on the heat pump thermostat terminal block. When Y is energized, a signal to start the compressor is sent to the UPM. The UPM checks a number of safety features before then starting the com- pressor. If any of the safety features connected to the UPM is in a fault condition, the UPM will not start the compressor and will flash a fault code on the red status LED indicating the nature of the fault. Additionally the UPM will delay compressor operation randomly on initial start-up (random start delay) and will prevent the com- pressor from restarting with less than 5 minutes of off time (anti short cycle delay). Once all faults are cleared and the time delays are satisfied, the UPM will energize the compressor. The compres- sor will operate as long as the thermostat calls for Y and there are no faults. Refer to the troubleshooting chart for fault diagnos- tics.

UNIT SIZE RATED

VOLTAGE V-Ph/Hz

COMPRESSOR FAN MOTOR FLA

FAN MOTOR HP

TOTAL UNIT FLA

MIN CIRCUIT AMP MOP CALC MAX FUSE/

HACRQTY RLA LRA

015 220-240/1/50 1 5.48 24.50 2.80 0.33 8.28 9.7 15.1 15 018 220-240/1/50 1 5.90 24.00 2.80 0.33 8.70 10.2 16.1 15

024 220-240/1/50 1 9.00 52.00 2.80 0.33 11.80 14.1 23.1 20 380-420/3/50 1 3.50 27.00 2.80 0.33 6.30 7.2 10.7 15

030 220-240/1/50 1 10.90 60.00 2.80 0.33 13.70 16.4 27.3 25 380-420/3/50 1 5.10 28.00 2.80 0.33 7.90 9.2 14.3 15

036 220-240/1/50 1 13.50 67.00 4.30 0.50 17.80 21.2 34.7 30 380-420/3/50 1 5.40 38.00 4.30 0.50 9.70 11.1 16.5 15

042 380-420/3/50 1 5.60 36.00 4.30 0.50 9.90 11.3 16.9 15 048 380-420/3/50 1 6.10 43.00 6.80 0.75 12.90 14.6 21.4 20 060 380-420/3/50 1 7.80 51.50 6.80 0.75 14.60 16.6 24.4 20 070 380-420/3/50 1 8.50 67.10 6.80 0.75 15.30 17.4 25.9 25

FLA Full Load Amps HACR Heating, Air-Conditioning and Refrigeration LRA Locked Rotor Amps RLA Rated Load Amps

UNIT SIZE RATED VOLTAGE

COMPRESSOR FAN MOTOR FLA

FAN MOTOR HP

TOTAL UNIT FLA

MIN CIRCUIT AMP MOP CALC MAX FUSE/

HACRQTY RLA LRA 009 220-240/1/50 1 2.77 18.80 0.85 0.10 3.62 4.3 7.1 15 012 220-240/1/50 1 4.35 21.00 0.85 0.10 5.20 6.3 10.6 15 015 220-240/1/50 1 5.48 24.50 0.90 0.17 6.38 7.8 13.2 15 018 220-240/1/50 1 5.90 24.00 1.60 0.25 7.50 9.0 14.9 15

024 220-240/1/50 1 9.00 52.00 1.60 0.25 10.60 12.9 21.9 20 380-420/3/50 1 3.50 27.00 0.90 0.25 4.40 5.3 8.8 15

030 220-240/1/50 1 10.90 60.00 1.60 0.25 12.50 15.2 26.1 25 380-420/3/50 1 5.10 28.00 0.90 0.25 6.00 7.3 12.4 15

036 220-240/1/50 1 13.50 67.00 3.30 0.50 16.80 20.2 33.7 30 380-420/3/50 1 5.40 38.00 1.80 0.50 7.20 8.6 14.0 15

042 380-420/3/50 1 5.60 36.00 1.80 0.50 7.40 8.8 14.4 15 048 380-420/3/50 1 6.10 43.00 2.80 0.75 8.90 10.4 16.5 20 060 380-420/3/50 1 7.80 51.50 2.80 0.75 10.60 12.6 20.4 20 070 380-420/3/50 1 8.50 67.10 2.80 0.75 11.30 13.4 21.9 20

FLA Full Load Amps HACR Heating, Air-Conditioning and Refrigeration LRA Locked Rotor Amps RLA Rated Load Amps

WARNING

To avoid possible injury or death due to electrical shock, open the power supply disconnect switch and secure it in an open position during installation.

20

Fig. 18 Sequence of Operation

CC

LOCKOUT CAN BE SET TO 4 VIA DIP SWITCH

BLINK CODE ON STATUS LED SOFT LOCKOUT RECORD ALARM

START COUNTER (IF APPLICABLE)

CC OUTPUT = ON

NO

YES

FRZ >TEMP LIMIT

Y1 = ON

TIME > 30 SEC

CON > 0

POWER / SWITCHES / SENSOR STATUS CHECK

START TIMER

NOYES

NO

YES

NO

YES

T > ASC OR RS SEC

YES

NO

NO

YES

START ANTI SHORT CYCLE

INITIAL POWER UP

YES

NO

START RANDOM START UP

START

COUNTER NEEDED?

YES

COUNT = 2 OR

COUNT = 4

BLINK CODE ON STATUS LED DISPLAY OUTPUT = PULSE ALR OUTPUT = ON/PULSE

NO

YES

HARD LOCKOUT?

CC OUTPUT = OFF

V > 18VAC NO

YES YES

NO

BLINK CODE ON STATUS LED

NO

RESET ON Y

CLEAR FAULTS

R = 24VAC NO

YES NO

YES

NO

YES

HPC = CLOSED

RESET ON R

CC OUTPUT = ON

NO

YES

TIME > 120 SEC

START TIMER

NO

YES

CNT = CNT+1

LPC = CLOSED

21

Fig. 19 Unit Protection Module (UPM)

COOLING AND HEATING MODES

The 50PC Series heat pumps operate in cooling with the reversing valve energized. When the O terminal is energized, the heat pump will be in the cooling mode; however, it will not be actively cooling until the Y and G terminals are also energized. If the Y and G terminals are energized without the O terminal, then the heat pump will operate in the heating mode.

If the unit is being connected to a thermostat with a malfunction light, this connection is made at the unit malfunction output or re- lay. See Table 12 for UPM fault blink codes.

Table 12 UPM Fault Blink Codes

Safety controls include the following: High-pressure switch located in the refrigerant discharge

line and wired across the HPC terminals on the UPM. Low-pressure switch located in the unit refrigerant suction

line and wired across terminals LPC1 and LPC2 on the UPM.

UPM dry contacts are normally open (NO). Water-side freeze protection sensor, mounted close to con-

densing water coil, monitors refrigerant temperature be- tween condensing water coil and thermal expansion valve. If temperature drops below or remains at freeze limit trip for 30 seconds, the controller will shut down the compres- sor and enter a soft lockout condition. The default freeze limit trip is 3.3C; however, this can be changed to 9.4C by cutting the R30 or Freeze1 resistor located on top of DIP switch SW1. Refer to Fig. 19, Item 3 for resistor lo- cation. If unit is employing a fresh water system (no anti- freeze protection), it is extremely important to have the Freeze1 R30 resistor set to 3.3C in order to shut down the unit at the appropriate leaving water temperature and protect heat pump from freezing if a freeze sensor is in- cluded.

Evaporator freeze protection sensor, mounted between the thermal expansion device and the evaporator, monitors re- frigerant temperature between the evaporator coil and ther- mal expansion valve. If temperature drops below or re- mains at freeze limit trip for 30 seconds, the controller will shut down the compressor and enter into a soft lockout condition. The default freeze limit trip is 3.3C. (See Fig. 20 and 21.)

The condensate overflow protection sensor is located in the drain pan of the unit and connected to the COND ter- minal on the UPM.

IMPORTANT: If the thermostat is provided with a malfunction light powered off of the common (C) side of the transformer, a jumper between R and COM terminal of ALR contacts must be made.

IMPORTANT: If the thermostat is provided with a malfunction light powered off of the hot (R) side of the transformer, then the thermostat malfunction light connection should be connected directly to the (ALR) contact on the units UPM.

LED BLINKS FAULT FAULT

CRITERIA 0 None All fault conditions nominal

1 High Pressure Refrigerant discharge pressure has exceeded 4137 kPa

2 Low Pressure Refrigerant suction pressure has fallen below 276 kPa

3 Water Coil Freeze Condition

Refrigerant temperature to the water coil has fallen below -1.1C for 30 seconds

4 Condensate Overflow Condensate levels in the unit drain pan are too high

5 Air Coil Freeze Condition

Refrigerant temperature to the air coil has fallen below -1.1C for 30 seconds

6 Brown Out Control voltage has fallen below 18 VAC

1 Board Power Indicator 2 C Board Status LED Indicator 3 Water Coil Freeze Protection Temperature Selection [R30] 4 Air Coil Freeze Protection Temperature Selection 5 C Board Settings 6 Water Coil Freeze Connection 7 Air Coil Freeze Connection 8 LED Status-Diagnostic Connection 9 24VAC Power Input 10 Compressor Contact Output 11 High Pressure Switch Connection 12 Call for Compressor Y1 13 Low Pressure Switch Connection 14 24VAC Power Common 15 Condensate Overflow Sensor 16 Dry Contact 17 C Board Ground Standoff

22

Fig. 20 Water-Side Freeze Protection Sensor

Fig. 21 Freeze Protection Sensor

The UPM includes the following features: Anti-short Cycle Timer A 5-minute delay on break timer prevents compressor short cycling. Random Start Each controller has an unique random start delay ranging from 270 to 300 seconds on initial power up to reduce the chance of multiple units simultaneously starting at the same time after power up or after a power interruption, thus avoiding creating a large electrical spike. Low Pressure Bypass Timer If the compressor is running and the low-pressure switch opens, the controller will keep the compressor ON for 120 seconds. After 2 minutes if the low-pressure switch remains open, the controllers will shut down the compressor and enter a soft lockout. The com- pressor will not be energized until the low-pressure switch closes and the anti-short cycle time delay expires. If the low-pressure switch opens 2 to 4 times in 1 hour, the unit will enter a hard lock- out. In order to exit hard lockout, power to the unit would need to be reset.

Brownout/Surge/Power Interruption Protection The brownout protection in the UPM will shut down the compres- sor if the incoming power falls below 18 VAC. The compressor will remain OFF until the voltage is above 18 VAC and ANTI- SHORT CYCLE TIMER (300 seconds) times out. The unit will not go into a hard lockout. Malfunction Output Alarm output is normally open (NO) dry contact. If pulse is select- ed the alarm output will be pulsed. The fault output will depend on the DIP switch setting for ALARM. If it is set to CONST, a con- stant signal will be produced to indicate a fault has occurred and the unit requires inspection to determine the type of fault. If it is set to PULSE, a pulse signal is produced and a fault code is detect- ed by a remote device indicating the fault. The remote device must have a malfunction detection capability when the C board is set to PULSE.

Test DIP Switch A test DIP switch is provided to reduce all time delays settings to 10 seconds during troubleshooting or verification of unit operation.

Freeze Sensor The default setting for the freeze limit trip is 3.3C (sensor num- ber 1); however, this can be changed to 9.4C by cutting the R30 resistor located on top of the DIP switch SW1. Since freeze sensor 2 is dedicated to monitor the evaporator coil it is recommended to leave the factory default setting on the board. The UPM will con- stantly monitor the refrigerant temperature with the sensor mount- ed close to the condensing water coil between the thermal expan- sion valve and water coil. If temperature drops below or remains at the freeze limit trip for 30 seconds, the controller will shut the compressor down and enter into a soft lockout condition. Both the status LED and the Alarm contact will be active. The LED will flash three times the code associated with this alarm condition. If this alarm occurs twice (or 4 times if DIP switch is set to 4) within an hour the UPM will enter a hard lockout condition.

Intelligent Reset If a fault condition is initiated, the 5-minute delay on break time period is initiated and the unit will restart after these delays expire. During this period the fault LED will indicate the cause of the fault. If the fault condition still exists or occurs 2 or 4 times (depending on 2 or 4 setting for lockout DIP switch) within 60 minutes, the unit will go into a hard lockout and will require a manual lockout reset. A single condensate overflow fault will cause the unit to go into a hard lockout immediately, and will require a manual lockout reset. Lockout Reset A hard lockout can be reset by turning the unit thermostat off and then back on when the RESET DIP switch is set to Y or by shut- ting off unit power at the circuit breaker when the RESET DIP switch is set to R.

CAUTION

If unit is employing a fresh water system (no anti-freeze pro- tection), it is extremely important to have the Freeze1 R30 resistor set to 3.3C in order to shut down the unit at the appropriate leaving-water temperature and protect the heat pump from freezing if a freeze sensor is included.

IMPORTANT: If 24 VAC output is needed R must be wired to ALR-COM terminal; 24 VAC will be available to the ALR- OUT terminal when the unit is in the alarm condition.

CAUTION

Operation of unit in test mode can lead to accelerated wear and premature failure of components. The "TEST" switch must be set back to "NO" after troubleshooting and/or servicing.

IMPORTANT: It is recommended to have a flow switch to prevent the unit from running if water flow is lost.

23

PRE-START-UP

System Checkout After completing the installation, and before energizing the unit, the following system checks should be made prior to initial start- up: 1. Verify that the supply voltage to the heat pump is in

accordance with the nameplate ratings. 2. Make sure that all electrical connections are tight and secure.

3. Check the electrical fusing and wiring for the correct size.

4. Verify that the low voltage wiring between the thermostat and the unit is correct.

5. Verify that the water piping is complete and correct.

6. Check that the water flow is correct, and adjust if necessary.

7. Check the blower for free rotation, and that it is secured to the shaft.

8. Verify that vibration isolation has been provided.

9. Verify that unit is serviceable. Be certain that all access panels are secured in place.

10. Verify that the blower support has been removed.

11. Verify that ductwork has been properly fastened to supply and return duct collars.

12. Make sure return air filters are positioned correctly in the fil- ter rack if removed during installation.

AIR COIL

To obtain maximum performance, clean the air coil before starting the unit. A ten percent solution of dishwasher detergent and water is recommended for both sides of the coil. Rinse thoroughly with water.

Fan Motor Speeds/Changing Speeds PSC

The standard motor for all 50PC Series heat pumps is a three- speed PSC motor. See Table 13. If a speed change is required, fol- low the instructions below: 1. Disconnect power to the heat pump. 2. For units with leaded motors, remove the front access cover.

3. Remove the fan speed wire from the fan relay. Clip the 6.4 mm quick connect from the lead and cap the unused lead.

4. Uncap the desired fan speed wire and terminate with a 6.4 mm quick connect. Connect to the fan relay.

5. If the motor is a 380 V motor and the speed is changed from high to medium or low, connect the high speed motor lead to the orange intermediate winding lead instead of simply capping it.

ECM

The optional motor for all size 015 and larger units is an ECM constant airflow motor. See Table 14. If a speed change is required, follow the instructions below: 1. Disconnect power to heat pump. 2. Remove the front access cover.

3. Change the ADJUST DIP switch on the ECM motor inter- face board at the bottom of the unit electrical box from NORM to + to increase fan speed and from NORM to - to decrease speed.

Table 13 50PCH 009-070 Blower Performance Standard PSC Unit

UNIT SIZE

FAN SPEED

RATED AIRFLOW

(L/s)

EXTERNAL STATIC PRESSURE (Pa)

25 50 75 100 125 150 175 200 225 250 275 300

009 Low

141 118 114 113 110

Med 149 149 142 130 114 High 165 157 149 142 134 126

012 Low

144 118 114 113 110

Med 149 149 142 130 114 High 165 157 149 142 134 126

015 Low

197 197 177 157

Med 220 205 189 169 157 High 230 220 216 197 177 157

018 Low

280 248 232 220

Med 319 311 299 287 267 232 High 380 362 342 315 267 208

024 Low

334 256 240 224 212 201

Med 326 322 315 303 283 244 High 413 393 374 358 330 279 224

030 Low

374 291 287 275 260 240

Med 326 319 303 287 267 244 High 393 374 354 326 295 271 248

036 Low

472 507 492 472 452 425 393

Med 555 531 507 480 452 417 354 High 570 566 539 507 476 441 393 354

042 Low

551 476 476 468 456 441 425

Med 574 570 562 547 523 492 456 High 680 673 657 637 614 574 523 476 425

048 Low

629 570 566 559 551 535 519

Med 669 657 641 621 602 578 551 High 759 736 712 684 657 629 598 562 527

060 Low

787 614 610 606 602 592 580 566 551

Med 743 739 736 732 718 704 680 657 625 590 High 873 865 846 826 806 787 763 736 708 669 625

070 Low

826 618 614 610 606 602 592 580 566 551

Med 747 743 739 736 732 718 704 680 657 625 590 High 881 873 865 846 826 806 787 763 736 708 669 625

24

Table 14 50PCH 015-070 Blower Performance ECM Unit

START-UP Use the procedure outlined below to initiate proper unit start-up. NOTE: This equipment is designed for indoor installation only.

Operating Limits ENVIRONMENT

This equipment is designed for indoor installation only. Extreme variations in temperature, humidity and corrosive water or air will adversely affect the unit performance, reliability and service life.

POWER SUPPLY

A voltage variation of 10% of nameplate utilization voltage is acceptable.

UNIT STARTING CONDITIONS

Depending on the model, units start and operate in an ambient temperature of 7.2C with entering-air temperature at 4.4C or 10.0C, entering-water temperature at 6.7C or 10.0C and with both air and water at the flow rates used. NOTE: These operating limits are not normal or continuous operating conditions. Assume that such a start-up is for the purpose of bringing the building space up to occupancy temperature. See Table 15 for operating limits.

1. Restore power to system. 2. Turn thermostat fan position to ON. Blower should start.

3. Balance airflow at registers.

4. Adjust all valves to the full open position and turn on the line power to all heat pump units.

5. Operate unit in the cooling cycle first, then the heating cycle. Refer to Table 15 for unit operating limits. Allow 15 minutes between cooling and heating tests for pressure to equalize.

See Table 16 for water temperature changes through the heat exchanger.

NOTE: Two factors determine the operating limits of a unit: entering-air temperature and water temperature. Whenever any of these factors are at a minimum or maximum level, the other two factors must be at a normal level to ensure proper unit operation.

Table 15 Operating Limits

LEGEND

*Antifreeze solution is required at these fluid temperatures.

Table 16 Water Temperature Change Through Heat Exchanger

UNIT SIZE

FAN SPEED

EXTERNAL STATIC PRESSURE (Pa) 25 50 75 100 125 150 175 200 225 250 275 300

015 142 142 142 142 142 142 142 142 142 142

Norm 167 167 167 167 167 167 167 167 167 167 + 192 192 192 192 192 192 192 192 192 192

018 200 200 200 200 200 200 200 200 200 200

Norm 236 236 236 236 236 236 236 236 236 + 271 271 271 271 271 271 271

024 233 233 233 233 233 233 233 233 233 233

Norm 275 275 275 275 275 275 275 275 275 275 + 316 316 316 316 316 316 316 316 316 316

030 284 284 284 284 284 284 284 284 284 284

Norm 334 334 334 334 334 334 334 334 334 334 + 384 384 384 384 384 384 384 384 384 384

036 334 334 334 334 334 334 334 334 334 334

Norm 393 393 393 393 393 393 393 393 393 393 + 452 452 452 452 452 452 452 452 452 452

042 445 445 445 445 445 445 445 445 445 445 445

Norm 524 524 524 524 524 524 524 524 524 524 + 603 603 603 603 603 603 603 603

048 467 467 467 467 467 467 467 467 467 467 467

Norm 550 550 550 550 550 550 550 550 550 550 550 + 632 632 632 632 632 632 632 632 632 632 632

060 568 568 568 568 568 568 568 568 568 568 568 568

Norm 668 668 668 668 668 668 668 668 668 668 668 668 + 768 768 768 768 768 768 768 768 768 768 768 768

070 634 634 634 634 634 634 634 634 634 634 634 634

Norm 746 746 746 746 746 746 746 746 746 746 746 746 + 858 858 858 858 858 858 858 858 858 858 858 858

WARNING

When the disconnect switch is closed, high voltage is pres- ent in some areas of the electrical panel. Exercise caution when working with the energized equipment. Failure to heed this warning could lead to personal injury.

AIR LIMITS EXTENDED

RANGE OPTION

COOLING Minimum ambient air temperature C 10.0 Maximum ambient air temperature C 37.8 Minimum evaporator entering air db/wb C 20/13.9 Rated air coil entering air db/wb C 26.7/19.5 Maximum evaporator entering air db/wb C 35.0/29.5 Minimum water coil entering fluid temperature C 10.0 Water loop typical coil entering fluid range temperature C 21.1/32.2 Maximum water coil entering fluid temperature C 37.7

HEATING Minimum ambient air temperature C 4.4 Maximum ambient air temperature C 29.5 Minimum evaporator entering air db C 10.0 Rated air coil entering air C 20.0 Maximum evaporator entering air db C 26.7 Normal water coil entering fluid range C -3.9/26.7* Minimum water coil entering Fluid C -6.7*

db Dry Bulb wb Wet Bulb

WATER FLOW RATE (GPM) COOLING RISE (C)

HEATING DROP (C)

Min Max Min Max For Closed Loop: Ground Source or Cooling/Boiler Systems at 0.054 L/(S-kW) 5.0 6.7 2.2 4.4

For Open Loop: Ground Water Systems at 0.027 L/(S-kW) 11.1 14.5 5.6 9.5

25

Scroll Compressor Rotation It is important to be certain compressor is rotating in the proper di- rection. To determine whether or not compressor is rotating in the proper direction: 1. Connect service gages to suction and discharge pressure fit-

tings. 2. Energize the compressor.

3. The suction pressure should drop and the discharge pressure should rise, as is normal on any start-up.

If the suction pressure does not drop and the discharge pressure does not rise to normal levels (see Tables 17-27): 1. Turn off power to the unit. Install disconnect tag. 2. Reverse any two of the unit power leads.

3. Reapply power to the unit and verify pressures are correct.

The suction and discharge pressure levels should now move to their normal start-up levels. When the compressor is rotating in the wrong direction, the unit makes more noise and does not provide cooling. After a few minutes of reverse operation, the scroll compressor in- ternal overload protection will open, thus activating the unit lock- out. This requires a manual reset. To reset, turn the thermostat on and then off. NOTE: There is a 5-minute time delay before the compressor will start.

Unit Start-Up 1. Set the thermostat to the highest setting. 2. Set the thermostat system switch to COOL and the fan

switch to the AUTO position. The reversing valve solenoid should energize. The compressor and fan should not run.

3. Reduce the thermostat setting approximately 3C below the room temperature.

4. Verify the heat pump is operating in the cooling mode.

5. Turn the thermostat system switch to the OFF position. The unit should stop running and the reversing valve should de energize.

6. Leave the unit off for approximately 5 minutes to allow for system equalization.

7. Turn the thermostat to the lowest setting.

8. Set the thermostat switch to HEAT.

9. Increase the thermostat setting approximately 3C above the room temperature.

10. Verify the heat pump is operating in the heating mode.

11. Set the thermostat to maintain the desired space temperature.

12. Check for vibrations, leaks, etc.

Table 17 50PC009 Typical Unit Operating Pressures and Temperatures

LEGEND

ENTERING WATER TEMP (C)

WATER FLOW (L/s)

COOLING HEATING SUCTION

PRESSURE (kPa)

DISCHARGE PRESSURE

(kPa)

WATER TEMP RISE

(C)

AIR TEMP DROP (C)DB

SUCTION PRESSURE

(kPa)

DISCHARGE PRESSURE

(kPa)

WATER TEMP DROP

(C)

AIR TEMP RISE (C)

-3.8 0.11 628-766 1731-2117 2.8-3.3 11.7-13.9 0.15 655-800 1766-2159 1.7-2.2 12.2-14.4

6.2 0.11 772-945 993-1214 7.8-9.4 12.2-15.0 738-897 1841-2255 3.3-3.9 13.3-16.1 0.15 731-897 945-1152 5.6-6.7 12.8-15.6 772-945 1883-2297 2.2-2.8 13.9-16.7

16.2 0.11 800-979 1221-1497 7.2-8.9 11.7-14.4 848-1035 1959-2393 3.9-5.0 15.0-18.3 0.15 766-931 1166-1421 5.0-6.7 12.2-15.0 890-1090 1993-2435 2.8-3.3 15.6-18.9

26.2 0.11 835-1021 1455-1779 7.2-8.9 11.7-14.4 959-1172 2069-2524 4.4-5.6 16.7-20.6 0.15 793-966 1379-1690 5.0-6.1 12.2-15.0 1007-1235 2110-2579 3.3-3.9 17.8-21.7

36.2 0.11 869-1062 1690-2062 7.2-8.3 11.1-13.9 1076-1310 2179-2662 5.0-6.7 18.3-22.8 0.15 821-1007 1600-1959 5.0-6.1 11.7-14.4 1124-1379 2221-2717 3.9-4.4 19.4-23.9

46.2 0.11 897-1097 1917-2345 6.7-8.3 11.1-13.3 1186-1448 2290-2800 6.1-7.2 20.0-24.4 0.15 855-1041 1821-2228 5.0-6.1 11.7-14.4 1241-1517 2338-2855 4.4-5.0 21.1-26.1

56.2 0.11 931-1138 2152-2628 6.7-8.3 10.6-13.3 1297-1586 2407-2938 6.7-8.3 21.7-26.7 0.15 883-1083 2042-2497 5.0-5.6 11.1-13.9 1359-1662 2448-2993 4.4-5.6 22.8-28.3

66.2 0.11 966-1179 2379-2911 6.7-7.8 10.6-12.8 0.15 917-1117 2262-2766 4.4-5.6 11.1-13.3

DB Dry Bulb No Operation in This Temperature Range

26

Table 18 50PC012 Typical Unit Operating Pressures and Temperatures

LEGEND

Table 19 50PC015 Typical Unit Operating Pressures and Temperatures

LEGEND

ENTERING WATER TEMP (C)

WATER FLOW (L/s)

COOLING HEATING SUCTION

PRESSURE (kPa)

DISCHARGE PRESSURE

(kPa)

WATER TEMP RISE

(C)

AIR TEMP DROP (C)DB

SUCTION PRESSURE

(kPa)

DISCHARGE PRESSURE

(kPa)

WATER TEMP DROP

(C)

AIR TEMP RISE (C)

-3.8 0.16 503-614 1835-2242 2.8-3.3 8.3-10.0 0.19 531-648 1876-2297 1.7-2.2 8.9-10.6

6.2 0.16 807-986 1304-1593 7.8-9.4 10.0-12.2 593-724 1924-2352 3.3-3.9 9.4-11.7 0.19 772-945 1228-1497 4.4-5.0 10.6-13.3 621-759 1973-2414 2.2-2.8 10.0-12.2

16.2 0.16 869-1062 1524-1862 7.8-9.4 10.0-11.7 1117-1366 2021-2469 3.9-4.4 11.1-13.3 0.19 835-1021 1428-1745 4.4-5.0 10.6-12.8 1172-1435 2069-2524 2.8-3.3 11.7-13.9

26.2 0.16 904-1104 1738-2124 7.2-8.9 9.4-11.7 759-924 2110-2579 4.4-5.6 12.2-15.0 0.19 862-1055 1635-2000 4.4-5.0 10.0-12.2 793-972 2166-2642 3.3-3.9 12.8-16.1

36.2 0.16 931-1138 1959-2393 7.2-8.9 9.4-11.1 841-1035 2207-2697 5.0-6.1 13.3-16.7 0.19 897-1090 1835-2248 3.9-5.0 10.0-12.2 890-1083 2255-2759 3.3-4.4 14.4-17.8

46.2 0.16 966-1179 2207-2697 7.2-8.9 8.9-11.1 924-1131 2297-2807 6.1-7.2 15.0-18.3 0.19 924-1131 2069-2531 3.9-5.0 9.4-11.7 972-1186 2352-2876 3.9-5.0 15.6-19.4

56.2 0.16 993-1214 2483-3035 7.2-8.9 8.9-10.6 1014-1235 2393-2924 6.7-7.8 16.1-20.0 0.19 952-1166 2331-2855 3.9-5.0 9.4-11.7 1062-1297 2448-2993 4.4-5.6 17.2-21.1

66.2 0.16 1028-1255 2793-3414 7.2-8.3 8.3-10.6 0.19 986-1200 2628-3207 3.9-5.0 8.9-11.1

DB Dry Bulb No Operation in This Temperature Range

ENTERING WATER TEMP (C)

WATER FLOW (L/s)

COOLING HEATING SUCTION

PRESSURE (kPa)

DISCHARGE PRESSURE

(kPa)

WATER TEMP RISE

(C)

AIR TEMP DROP (C)DB

SUCTION PRESSURE

(kPa)

DISCHARGE PRESSURE

(kPa)

WATER TEMP DROP

(C)

AIR TEMP RISE (C)

-3.8 0.18 510-621 1683-2062 1.7-2.2 7.2-8.3 0.24 538-655 1731-2110 1.1-1.7 7.2-8.9

6.2 0.18 841-1028 1262-1545 7.8-10.0 10.6-12.8 600-731 1773-2166 2.2-2.8 8.3-10.0 0.24 807-986 1186-1448 4.4-5.6 11.1-13.3 628-766 1814-2221 1.7-2.2 8.9-10.6

16.2 0.18 904-1104 1476-1800 7.8-10.0 10.0-12.2 1131-1386 1855-2269 2.8-3.3 9.4-11.1 0.24 869-1062 1386-1690 4.4-5.6 10.6-13.3 1193-1455 1904-2324 1.7-2.2 10.0-12.2

26.2 0.18 938-1145 1683-2055 7.8-9.4 10.0-12.2 766-938 1945-2373 3.3-3.9 10.6-12.8 0.24 904-1104 1586-1938 4.4-5.6 10.6-12.8 807-986 1993-2435 2.2-2.8 11.1-13.3

36.2 0.18 972-1186 1897-2317 7.8-9.4 9.4-11.7 855-1048 2028-2483 3.9-4.4 11.7-13.9 0.24 931-1138 1779-2179 4.4-5.6 10.0-12.2 904-1104 2083-2545 2.8-3.3 12.2-15.0

46.2 0.18 1000-1228 2138-2607 7.8-9.4 9.4-11.1 938-1145 2117-2586 4.4-5.0 12.8-15.6 0.24 966-1179 2007-2455 4.4-5.6 10.0-12.2 986-1207 2116-2648 2.8-3.3 13.3-16.7

56.2 0.18 1035-1262 2407-2938 7.8-9.4 8.9-11.1 1028-1255 2200-2690 4.4-5.6 13.9-16.7 0.24 993-1214 2262-2766 4.4-5.0 9.4-11.7 1076-1317 2255-2759 3.3-3.9 14.4-17.8

66.2 0.18 1069-1304 2704-3311 7.2-8.9 8.9-10.6 0.24 1028-1255 2545-3111 4.4-5.0 9.4-11.7

DB Dry Bulb No Operation in This Temperature Range

27

Table 20 50PC018 Typical Unit Operating Pressures and Temperatures

LEGEND

Table 21 50PC024 Typical Unit Operating Pressures and Temperatures

LEGEND

ENTERING WATER TEMP (C)

WATER FLOW (L/s)

COOLING HEATING SUCTION

PRESSURE (kPa)

DISCHARGE PRESSURE

(kPa)

WATER TEMP RISE

(C)

AIR TEMP DROP (C)DB

SUCTION PRESSURE

(kPa)

DISCHARGE PRESSURE

(kPa)

WATER TEMP DROP

(C)

AIR TEMP RISE (C)

-3.8 0.19 448-552 1945-2373 3.3-3.9 7.8-9.4 0.32 503-614 2028-2476 1.7-2.2 8.3-10.0

6.2 0.19 835-1021 1269-1552 9.4-11.7 10.0-12.2 552-676 2062-2517 3.9-5.0 8.9-11.1 0.32 807-986 1152-1407 5.6-7.2 10.6-12.8 614-745 2145-2621 2.2-2.8 9.4-11.7

16.2 0.19 848-1041 1531-1869 9.4-11.1 9.4-11.7 655-800 2173-2655 5.0-6.1 10.6-12.8 0.32 821-1000 1393-1704 5.6-6.7 10.0-12.8 724-883 2269-2773 2.8-3.9 11.1-13.3

26.2 0.19 862-1055 1793-2193 8.9-10.6 9.4-11.7 752-917 2293-2800 6.1-7.2 11.7-14.4 0.32 828-1014 1635-1993 5.6-6.7 10.0-12.2 835-1021 2386-2917 3.3-4.4 12.2-15.0

36.2 0.19 876-1069 2055-2517 8.3-10.6 9.4-11.1 855-1041 2407-2945 6.7-2.8 12.8-15.6 0.32 841-1028 1869-2283 5.0-6.1 10.0-11.7 952-1159 2511-3062 3.9-5.0 13.9-16.7

46.2 0.19 890-1090 2317-2835 7.8-10.0 8.9-11.1 952-1166 2524-3083 7.8-3.9 14.4-17.2 0.32 855-1048 2110-2579 5.0-6.1 9.4-11.7 1062-1297 2628-3214 4.4-5.6 15.0-18.3

56.2 0.19 904-1104 2579-3159 7.8-9.4 8.9-10.6 1055-1290 2642-3228 8.9-8.9 15.6-18.9 0.32 869-1062 2345-2869 4.4-5.6 9.4-11.1 1172-1435 2752-3359 5.0-6.7 16.1-20.0

66.2 0.19 917-1117 2848-3476 7.2-8.9 8.3-10.6 0.32 883-1076 2586-3159 4.4-5.6 8.9-11.1

DB Dry Bulb No Operation in This Temperature Range

ENTERING WATER TEMP (C)

WATER FLOW (L/s)

COOLING HEATING SUCTION

PRESSURE (kPa)

DISCHARGE PRESSURE

(kPa)

WATER TEMP RISE

(C)

AIR TEMP DROP (C)DB

SUCTION PRESSURE

(kPa)

DISCHARGE PRESSURE

(kPa)

WATER TEMP DROP

(C)

AIR TEMP RISE (C)

-3.8 0.32 497-600 2042-2490 2.8-3.3 11.7-13.9 0.44 517-635 2076-2538 1.7-2.2 12.2-14.4

6.2 0.32 786-959 1069-1310 7.8-9.4 12.2-15.0 607-738 2166-2648 3.3-3.9 13.3-16.1 0.44 745-910 1014-1241 5.6-6.7 12.8-15.6 635-772 2214-2704 2.2-2.8 13.9-16.7

16.2 0.32 800-979 1324-1614 7.2-8.9 11.7-14.4 717-876 2297-2807 3.9-5.0 15.0-18.3 0.44 766-931 1255-1531 5.0-6.7 12.2-15.0 752-917 2345-2862 2.8-3.3 15.6-18.9

26.2 0.32 821-1007 1573-1924 7.2-8.9 11.7-14.4 828-1007 2428-2966 4.4-5.6 16.7-20.6 0.44 779-952 1497-1828 5.0-6.1 12.2-15.0 862-1055 2476-3028 3.3-3.9 17.8-21.7

36.2 0.32 841-1028 1821-2228 7.2-8.3 11.1-13.9 938-1145 2559-3124 5.0-6.7 18.3-22.8 0.44 800-979 1731-2117 5.0-6.1 11.7-14.4 979-1200 2607-3186 3.9-4.4 19.4-23.9

46.2 0.32 862-1048 2076-2538 6.7-8.3 11.1-13.3 1048-1276 2683-3283 6.1-7.2 20.0-24.4 0.44 814-1000 1973-2407 5.0-6.1 11.7-14.4 1097-1338 2738-3345 4.4-5.0 21.1-26.1

56.2 0.32 876-1076 2324-2842 6.7-8.3 10.6-13.3 1159-1414 2814-3442 6.7-8.3 21.7-26.7 0.44 835-1021 2207-2704 5.0-5.6 11.1-13.9 1214-1283 2869-3511 4.4-5.6 22.8-28.3

66.2 0.32 897-1097 2579-3152 6.7-7.8 10.6-12.8 0.44 855-1041 2448-2993 4.4-5.6 11.1-13.3

DB Dry Bulb No Operation in This Temperature Range

28

Table 22 50PC030 Typical Unit Operating Pressures and Temperatures

LEGEND

Table 23 50PC036 Typical Unit Operating Pressures and Temperatures

LEGEND

ENTERING WATER TEMP (C)

WATER FLOW (L/s)

COOLING HEATING SUCTION

PRESSURE (kPa)

DISCHARGE PRESSURE

(kPa)

WATER TEMP RISE

(C)

AIR TEMP DROP (C)DB

SUCTION PRESSURE

(kPa)

DISCHARGE PRESSURE

(kPa)

WATER TEMP DROP

(C)

AIR TEMP RISE (C)

-3.8 0.22 503-614 1835-2242 2.8-3.3 8.3-10.0 0.47 531-648 1876-2297 1.7-2.2 8.9-10.6

6.2 0.22 807-986 1304-1593 7.8-9.4 10.0-12.2 596-724 1924-2352 3.3-3.9 9.4-11.7 0.47 772-945 1228-1497 4.4-5.0 10.6-13.3 621-759 1973-2414 2.2-2.8 10.0-12.2

16.2 0.22 869-1062 1524-1862 7.8-9.4 10.0-11.7 1117-1366 2021-2469 3.9-4.4 11.1-13.3 0.47 835-1021 1428-1745 4.4-5.0 10.6-12.8 1172-1435 2069-2524 2.8-3.3 11.7-13.9

26.2 0.22 904-1104 1738-2124 7.2-8.9 9.4-11.7 759-924 2110-2579 4.4-5.6 12.2-15.0 0.47 862-1055 1635-2000 4.4-5.0 10.0-12.2 793-972 2166-2642 3.3-3.9 12.8-16.1

36.2 0.22 931-1138 1959-2393 7.2-8.9 9.4-11.1 841-1035 2207-2697 5.0-6.1 13.3-16.7 0.47 897-1090 1835-2248 3.9-5.0 10.0-12.2 890-1083 2255-2759 3.3-4.4 14.4-17.8

46.2 0.22 966-1179 2207-2697 7.2-8.9 8.9-11.1 924-1131 2297-2807 6.1-7.2 15.0-18.3 0.47 924-1131 2069-2531 3.9-5.0 9.4-11.7 972-1186 2352-2876 3.9-5.0 15.6-19.4

56.2 0.22 993-1214 2483-3035 7.2-8.9 8.9-10.6 1014-1235 2393-2924 6.7-7.8 16.1-20.0 0.47 952-1166 2331-2855 3.9-5.0 9.4-11.7 1062-1297 2448-2993 4.4-5.6 17.2-21.1

66.2 0.22 1028-1255 2793-3414 7.2-8.3 8.3-10.6 0.47 986-1200 2628-3207 3.9-5.0 8.9-11.1

DB Dry Bulb No Operation in This Temperature Range

ENTERING WATER TEMP (C)

WATER FLOW (L/s)

COOLING HEATING SUCTION

PRESSURE (kPa)

DISCHARGE PRESSURE

(kPa)

WATER TEMP RISE

(C)

AIR TEMP DROP (C)DB

SUCTION PRESSURE

(kPa)

DISCHARGE PRESSURE

(kPa)

WATER TEMP DROP

(C)

AIR TEMP RISE (C)

-3.8 0.28 510-621 1683-2062 1.7-2.2 7.2-8.3 0.57 538-655 1731-2110 1.1-1.7 7.2-8.9

6.2 0.28 841-1028 1262-1545 7.8-10.0 10.6-12.8 600-731 1773-2166 2.2-2.8 8.3-10.0 0.57 807-986 1186-1448 4.4-5.6 11.1-13.3 628-766 1814-2221 1.7-2.2 8.9-10.6

16.2 0.28 904-1104 1476-1800 7.8-10.0 10.0-12.2 1131-1386 1855-2269 2.8-3.3 9.4-11.1 0.57 869-1062 1386-1690 4.4-5.6 10.6-13.3 1193-1455 1904-2324 1.7-2.2 10.0-12.2

26.2 0.28 938-1145 1683-2055 7.8-9.4 10.0-12.2 766-938 1945-2373 3.3-3.9 10.6-12.8 0.57 904-1104 1586-1938 4.4-5.6 10.6-12.8 807-986 1993-2435 2.2-2.8 11.1-13.3

36.2 0.28 972-1186 1897-2317 7.8-9.4 9.4-11.7 855-1048 2028-2483 3.9-4.4 11.7-13.9 0.57 931-1138 1779-2179 4.4-5.6 10.0-12.2 904-1104 2083-2545 2.8-3.3 12.2-15.0

46.2 0.28 1000-1228 2138-2607 7.8-9.4 9.4-11.1 938-1145 2117-2586 4.4-5.0 12.8-15.6 0.57 966-1179 2007-2455 4.4-5.6 10.0-12.2 986-1207 2166-2648 2.8-3.3 13.3-16.7

56.2 0.28 1035-1262 2407-2938 7.8-9.4 8.9-11.1 1028-1255 2200-2690 4.4-3.9 13.9-16.7 0.57 993-1214 2262-2766 4.4-5.0 9.4-11.7 1076-1317 2255-2759 3.3-3.9 14.4-17.8

66.2 0.28 1069-1304 2704-3311 7.2-8.9 8.9-10.6 0.57 1028-1255 2545-3111 4.4-5.0 9.4-11.7

DB Dry Bulb No Operation in This Temperature Range

29

Table 24 50PC042 Typical Unit Operating Pressures and Temperatures

LEGEND

Table 25 50PC048 Typical Unit Operating Pressures and Temperatures

LEGEND

ENTERING WATER TEMP (C)

WATER FLOW (L/s)

COOLING HEATING SUCTION

PRESSURE (kPa)

DISCHARGE PRESSURE

(kPa)

WATER TEMP RISE

(C)

AIR TEMP DROP (C)DB

SUCTION PRESSURE

(kPa)

DISCHARGE PRESSURE

(kPa)

WATER TEMP DROP

(C)

AIR TEMP RISE (C)

-3.8 0.38 441-538 1710-2090 2.8-3.3 8.3-10.0 0.63 462-566 1725-2145 1.7-2.2 8.9-10.6

6.2 0.38 752-924 1262-1545 10.0-12.2 10.6-12.8 517-628 1800-2200 3.3-4.4 9.4-11.7 0.63 724-883 1186-1448 5.6-6.7 11.1-13.9 545-662 1741-2255 2.2-2.8 10.0-12.8

16.2 0.38 814-993 1476-1800 10.0-12.2 10.6-12.8 979-1193 1883-2304 4.4-5.6 11.1-13.3 0.63 779-952 1386-1690 5.6-6.7 11.1-13.3 1028-1255 1931-2359 2.8-3.9 11.7-14.4

26.2 0.38 841-1028 1683-2055 9.4-11.7 10.0-12.2 662-807 1973-2407 5.0-6.1 12.2-15.0 0.63 807-986 1586-1938 5.6-6.7 10.6-13.3 697-848 2021-2469 3.3-4.4 13.3-16.1

36.2 0.38 869-1062 1897-2317 9.4-11.7 10.0-12.2 738-904 2062-2517 6.1-7.2 13.9-16.7 0.63 835-1021 1779-2179 5.6-6.7 10.6-12.8 779-952 2110-2579 3.9-5.0 14.4-17.8

46.2 0.38 897-1097 2138-2607 9.4-11.7 9.4-11.7 807-986 2145-2621 6.7-8.3 15.0-18.3 0.63 862-1055 2007-2455 5.6-6.7 10.0-12.2 848-1041 2200-2690 4.4-5.6 16.1-19.4

56.2 0.38 924-1131 2407-2938 9.4-11.1 9.4-11.1 883-1083 2235-2731 7.2-8.9 16.1-20.0 0.63 890-1090 2262-2766 5.0-6.7 10.0-12.2 931-1138 2290-2800 5.0-6.1 17.2-21.1

66.2 0.38 959-1172 2704-3311 8.9-11.1 8.9-11.1 0.63 917-1124 2545-3111 5.0-6.7 9.4-11.7

DB Dry Bulb No Operation in This Temperature Range

ENTERING WATER TEMP (C)

WATER FLOW (L/s)

COOLING HEATING SUCTION

PRESSURE (kPa)

DISCHARGE PRESSURE

(kPa)

WATER TEMP RISE

(C)

AIR TEMP DROP (C)DB

SUCTION PRESSURE

(kPa)

DISCHARGE PRESSURE

(kPa)

WATER TEMP DROP

(C)

AIR TEMP RISE (C)

-3.8 0.38 490-600 1910-2338 3.3-3.9 8.3-10.6 0.63 517-635 1959-2393 2.2-2.8 8.9-11.1

6.2 0.38 814-993 1338-1635 11.7-13.9 10.6-12.8 579-703 2007-2455 3.9-5.0 10.0-12.2 0.63 779-952 1255-1538 6.7-7.8 11.1-13.3 607-745 2062-2517 2.8-3.3 10.6-12.8

16.2 0.38 876-1069 1559-1904 11.7-13.9 10.0-12.2 1097-1338 2104-2573 5.0-6.1 11.1-13.9 0.63 841-1028 1469-1793 6.7-7.8 10.6-13.3 1152-1407 2159-2642 3.3-3.9 11.7-14.4

26.2 0.38 904-1104 1786-2179 11.7-13.9 10.0-12.2 745-910 2207-2697 5.6-7.2 12.8-15.6 0.63 869-1062 1676-2048 6.7-7.8 10.6-12.8 779-952 2262-2759 3.9-5.0 13.3-16.1

36.2 0.38 938-1145 2007-2448 11.1-13.9 9.4-11.7 828-1014 2304-2814 6.7-8.3 13.9-17.2 0.63 897-1097 1883-2304 6.7-7.8 10.0-12.2 869-1062 2359-2883 4.4-5.6 15.0-17.8

46.2 0.38 966-1179 2262-2766 11.1-13.3 9.4-11.1 904-1110 2400-2931 7.8-9.4 15.0-18.9 0.63 931-1138 2124-2600 6.1-7.8 10.0-12.2 952-1166 2455-3007 5.0-6.1 16.1-20.0

56.2 0.38 1000-1221 2545-3111 11.1-13.3 8.9-11.1 993-1214 2497-3048 8.3-10.0 16.7-20.6 0.63 959-1172 2393-2924 6.1-7.8 9.4-11.7 1041-1276 2559-3124 5.6-6.7 17.8-21.7

66.2 0.38 1028-1262 2862-3504 10.6-13.3 8.9-10.6 0.63 986-1207 2697-3290 6.1-7.8 9.4-11.7

DB Dry Bulb No Operation in This Temperature Range

30

Table 26 50PC060 Typical Unit Operating Pressures and Temperatures

LEGEND

Table 27 50PC070 Typical Unit Operating Pressures and Temperatures

LEGEND

Flow Regulation Flow regulation can be accomplished by two methods. Most water control valves have a flow adjustment built into the valve. By measuring the pressure drop through the unit heat exchanger, the flow rate can be determined. Adjust the water control valve until the flow of 0.09464 to 0.1262 L/s is achieved. Since the pressure constantly varies, two pressure gages may be needed in some applications. An alternative method is to install a flow control device. These devices are typically an orifice of plastic material designed to allow a specified flow rate that are mounted on the outlet of the water control valve. Occasionally these valves produce a velocity noise that can be reduced by applying some back pressure. To accomplish this, slightly close the leaving isolation valve of the well water setup.

Flushing Once the piping is complete, units require final purging and loop charging. A flush cart pump of at least 1.1 kW is needed to achieve adequate flow velocity in the loop to purge air and dirt particles from the loop. Flush the loop in both directions with a high volume of water at a high velocity. Follow the steps below to properly flush the loop: 1. Verify power is off. 2. Fill loop with water from hose through flush cart before using

flush cart pump to ensure an even fill. Do not allow the water level in the flush cart tank to drop below the pump inlet line to prevent air from filling the line.

ENTERING WATER TEMP (C)

WATER FLOW (L/s)

COOLING HEATING SUCTION

PRESSURE (kPa)

DISCHARGE PRESSURE

(kPa)

WATER TEMP RISE

(C)

AIR TEMP DROP (C)DB

SUCTION PRESSURE

(kPa)

DISCHARGE PRESSURE

(kPa)

WATER TEMP DROP

(C)

AIR TEMP RISE (C)

-3.8 0.51 469-579 1766-2159 2.8-3.9 10.6-12.8 0.76 503-614 1800-2200 2.2-2.8 11.1-13.9

6.2 0.51 779-952 1193-1462 10.0-12.2 10.6-12.8 559-683 1910-2338 3.9-4.4 12.2-14.4 0.76 759-924 1117-1366 6.7-7.8 11.1-13.3 593-724 1952-2386 2.8-3.3 12.8-15.6

16.2 0.51 800-979 1428-1745 9.4-11.7 10.6-12.8 641-786 2062-2517 4.4-5.0 13.3-16.1 0.76 772-945 1331-1628 6.7-7.8 10.6-13.3 683-835 2104-2573 3.3-3.9 13.9-17.2

26.2 0.51 814-1000 1655-2021 9.4-11.7 10.0-12.8 731-890 2214-2704 5.0-6.1 14.4-17.8 0.76 793-966 1545-1890 6.1-7.8 10.6-12.8 779-952 2255-2759 3.9-4.4 15.6-18.9

36.2 0.51 835-1021 1883-2304 9.4-11.7 10.0-12.2 814-1000 2359-2883 5.6-6.7 16.1-19.4 0.76 807-986 1759-2152 6.1-7.8 10.6-12.8 869-1062 2407-2945 4.4-5.0 16.7-20.6

46.2 0.51 848-1041 2117-2586 8.9-11.1 10.0-12.2 904-1104 2511-3062 6.1-7.8 17.2-21.1 0.76 828-1007 1979-2414 6.1-7.2 10.6-12.8 959-1172 2559-3131 4.4-5.6 18.3-22.2

56.2 0.51 869-1062 2345-2869 8.9-11.1 10.0-12.2 986-1207 2655-3248 6.7-8.3 18.3-22.8 0.76 841-1028 2193-2676 6.1-7.2 10.0-12.2 1048-1283 2711-3311 5.0-6.1 19.4-23.9

66.2 0.51 883-1083 2573-3145 8.9-10.6 9.4-11.7 0.76 862-1048 2407-2938 6.1-7.2 10.0-12.2

DB Dry Bulb No Operation in This Temperature Range

ENTERING WATER TEMP (C)

WATER FLOW (L/s)

COOLING HEATING SUCTION

PRESSURE (kPa)

DISCHARGE PRESSURE

(kPa)

WATER TEMP RISE

(C)

AIR TEMP DROP (C)DB

SUCTION PRESSURE

(kPa)

DISCHARGE PRESSURE

(kPa)

WATER TEMP DROP

(C)

AIR TEMP RISE (C)

-3.8 0.76 469-579 1766-2159 2.8-3.9 10.6-12.8 1.01 503-614 1800-2200 2.2-2.8 11.1-13.9

6.2 0.76 807-986 1255-1531 8.3-10.6 11.7-14.4 559-683 1910-2338 3.9-4.4 12.2-14.4 1.01 786-959 1172-1435 6.1-7.8 12.2-15.0 593-724 1952-2386 2.8-3.3 12.8-15.6

16.2 0.76 828-1014 1483-1814 8.3-10.0 11.1-13.9 641-786 2062-2517 4.4-5.0 13.3-16.1 1.01 807-986 1386-1697 6.1-7.8 11.7-14.4 683-835 2104-2573 3.3-3.9 13.9-17.2

26.2 0.76 848-1035 1710-2097 7.8-9.4 11.1-13.3 731-890 2214-2704 5.0-6.1 14.4-17.8 1.01 821-1007 1600-1959 6.1-7.2 11.7-13.9 779-952 2255-2759 3.9-4.4 15.6-18.9

36.2 0.76 869-1062 1945-2343 7.8-9.4 10.6-13.3 814-1000 2359-2883 5.6-6.7 16.1-19.4 1.01 841-1028 1814-2221 5.6-7.2 11.1-13.9 869-1062 2407-2945 4.4-5.0 16.7-20.6

46.2 0.76 890-1083 2173-2655 7.2-8.9 10.6-12.8 904-1104 2511-3062 6.1-7.8 17.2-21.1 1.01 862-1055 2028-2483 5.6-6.7 10.6-13.3 959-1172 2559-3131 4.4-5.6 18.3-22.2

56.2 0.76 910-1110 2400-2938 7.2-8.9 10.0-12.2 986-1207 2655-3248 6.7-8.3 18.3-22.8 1.01 883-1076 2248-2745 5.6-6.7 10.6-12.8 1048-1283 2711-3311 5.0-6.1 19.4-23.9

66.2 0.76 924-1131 2635-3214 6.7-8.3 9.4-11.7 1.01 904-1104 2462-3007 5.0-6.1 10.0-12.2

DB Dry Bulb No Operation in This Temperature Range

WARNING

To avoid possible injury or death due to electrical shock, open the power supply disconnect switch and secure it in an open position before flushing system.

31

3. Maintain a fluid level in the tank above the return tee to avoid air entering back into the fluid.

4. Shutting off the return valve that connects into the flush cart reservoir will allow 345 kPa surges to help purge air pockets. This maintains the pump at 345 kPa.

5. To purge, keep the pump at 345 kPa until maximum pumping pressure is reached.

6. Open the return valve to send a pressure surge through the loop to purge any air pockets in the piping system.

7. A noticeable drop in fluid level will be seen in the flush cart tank. This is the only indication of air in the loop.

NOTE: If air is purged from the system while using a 254 mm PVC flush tank, the level drop will only be 25.4 to 50.8 mm since liquids are incompressible. If the level drops more than this, flushing should continue since air is still being compressed in the loop. If level is less than 25.4 to 50.8 mm, reverse the flow.

8. Repeat this procedure until all air is purged.

9. Restore power.

Antifreeze may be added before, during or after the flushing pro- cess. However, depending on when it is added in the process, it can be wasted. Refer to the Antifreeze section for more detail. Loop static pressure will fluctuate with the seasons. Pressures will be higher in the winter months than during the warmer months. This fluctuation is normal and should be considered when charging the system initially. Run the unit in either heating or cool- ing for several minutes to condition the loop to a homogenous temperature. When complete, perform a final flush and pressurize the loop to a static pressure of 276 to 345 kPa for winter months or 103 to 138 kPa for summer months. After pressurization, be sure to remove the plug from the end of the loop pump motor(s) to allow trapped air to be discharged and to ensure the motor housing has been flooded. Be sure the loop flow center provides adequate flow through the unit by checking pressure drop across the heat exchanger. Compare the results to the data in Tables 28 and 29.

Table 28 Water Coil Volume

Table 29 Water Side Pressure Drop

NOTE: All values based on pure water at 20.0C.

Antifreeze In areas where entering loop temperatures drop below 4.4C or where piping will be routed through areas subject to freezing, anti- freeze is needed. Alcohols and glycols are commonly used as antifreeze agents. Freeze protection should be maintained to 9.5C below the lowest expected entering loop temperature. For example, if the lowest ex- pected entering loop temperature is 1.1C, the leaving loop tem- perature would be 5.6 to 3.9C. Therefore, the freeze protection should be at 10.6C ( 1.1C - 9.5C = 10.6C).

Calculate the total volume of fluid in the piping system. See Table 30. Use the percentage by volume in Table 31 to determine the amount of antifreeze to use. Antifreeze concentration should be checked from a well mixed sample using a hydrometer to measure specific gravity.

50PC UNIT SIZE

Coaxial Coil Volume (gal)

Coaxial Coil Volume (liters)

009 0.08 0.30 012 0.08 0.30 015 0.09 0.34 018 0.14 0.53 024 0.24 0.91 030 0.24 0.91 036 0.27 1.02 042 0.27 1.02 048 0.49 1.85 060 0.62 2.35 070 0.62 2.35

50PC UNIT SIZE

WATER FLOW RATE (l/s)

WATER SIDE PRESSURE DROP (kPa)

009 0.063 3.4 0.126 11.7 0.189 24.2

012 0.095 7.1 0.158 17.9 0.221 32.8

015 0.126 12.9 0.189 26.8 0.252 45.0

018 0.158 7.9 0.252 18.5 0.315 27.6

024 0.189 11.5 0.252 19.3 0.379 40.0

030 0.252 13.9 0.379 28.7 0.505 48.2

036 0.284 10.7 0.379 17.9 0.568 37.2

041 0.284 10.7 0.379 17.9 0.568 37.2

042 0.315 13.7 0.505 31.8 0.694 56.5

048 0.379 5.6 0.505 9.3 0.757 19.4

060 0.473 9.5 0.631 16.0 0.946 33.2

070 0.568 13.8 0.757 23.2 1.136 48.2

All alcohols should be pre-mixed and pumped from a reservoir outside of the building or introduced under water level to prevent fuming.

32

FREEZE PROTECTION SELECTION

The 1.1C FP1 factory setting (water) should be used to avoid freeze damage to the unit. Once antifreeze is selected, the JW3 jumper (FP1) should be clipped on the control to select the low temperature (antifreeze 10.6C) set point to avoid nuisance faults.

Cooling Tower/Boiler Systems These systems typically use a common loop temperature main- tained at 15.6 to 32.2C. Carrier recommends using a closed cir- cuit evaporative cooling tower with a secondary heat exchanger between the tower and the water loop. If an open type cooling tower is used continuously, chemical treatment and filtering will be necessary.

Table 30 Approximate Fluid Volume (L) per 30.48 m of Pipe

NOTE: Volume of heat exchanger is approximately 3.785 L.

Table 31 Antifreeze Percentages by Volume

OPERATION

Power Up Mode The unit will not operate until all the inputs, terminals and safety controls are checked for normal operation. NOTE: The compressor will have a 5-minute anti-short cycle upon power up.

SERVICE Perform the procedures outlined below periodically, as indicated. An annual checkup by a licensed refrigeration mechanic is rec- ommended. Recording the performance measurements of volts, amps, and water temperature differences (both heating and cool- ing) is recommended. This data should be compared to the infor- mation on the units data plate and the data taken at the original start-up of the equipment. Periodic lockouts almost always are caused by air or water flow problems. The lockout (shutdown) of the unit is a normal protec- tive measure in the design of the equipment. If continual lockouts occur, call a mechanic immediately to check for water flow prob- lems, water temperature problems, airflow problems or air

temperature problems. Use of the pressure and temperature charts for the unit may be required to properly determine the cause.

Filters Filter changes or cleanings are required at regular intervals. The time period between filter changes will depend upon the type of environment the equipment is used in. In a single family home that is not under construction, changing or cleaning the filter every 60 days may be sufficient. In other applications such as motels, where daily vacuuming produces a large amount of lint, filter changes may be need to be as frequent as biweekly. See Fig. 1 and 2 for re- placement filter sizes. Note that horizontal units containing two filters are taped together at the factory to facilitate removal. This should be done by end user as new filters are installed.

Condensate Drain Pans The condensate drain should be checked annually by cleaning and flushing to ensure proper drainage.

Refrigerant System Verify air and water flow rates are at proper levels before servic- ing. To maintain sealed circuitry integrity, do not install service gages unless unit operation appears abnormal. Check to see that unit is within the superheat and subcooling tem- perature ranges shown in Tables 17-27. If the unit is not within these ranges, recover and reweigh in refrigerant charge.

Compressor Conduct annual amperage checks to ensure that amp draw is no more than 10% greater than indicated on the serial plate data.

Fan Motors All units have lubricated fan motors. Fan motors should never be lubricated unless obvious, dry operation is suspected. Periodic maintenance oiling is NOT recommended as it will result in dirt accumulating in the excess oil and cause eventual motor failure. Conduct annual dry operation check and amperage check to

PIPE DIAMETER VOLUME

mm L Copper 25.40 15.52

31.75 24.23 38.10 34.83

Rubber Hose 25.40 14.76 Polyethylene 19.05 10.60

25.40 17.03 31.75 30.28 12.70 41.26 50.80 68.14 31.75 31.42 38.10 41.26 50.80 64.35

ANTIFREEZE MINIMUM TEMPERATURE FOR

FREEZE PROTECTION -12C -9.4C -6.67C -3.89C

Methanol (%) 25 21 16 10 100% USP Food Grade Propylene Glycol (%) 38 30 22 15

Ethanol (%) 29 25 20 14

IMPORTANT: If the installer or service provider adjusts the unit refrigerant charge from the factory charge levels, it must be noted on the unit label and in related documen- tation as required by EU Regulation (517/2014).

IMPORTANT: When a compressor is removed from this unit, system refrigerant circuit oil will remain in the compressor. To avoid leakage of compressor oil, the refrigerant lines of the compressor must be sealed after it is removed.

IMPORTANT: All refrigerant discharged from this unit must be recovered without exception. Technicians must follow industry accepted guidelines and all local, state and federal stat- utes for the recovery and disposal of refrigerants.

IMPORTANT: To avoid the release of refrigerant into the atmosphere, the refrigerant circuit of this unit must only be serviced by technicians who meet local, state and federal pro- ficiency requirements.

IMPORTANT: To prevent injury or death due to electrical shock or contact with moving parts, open unit disconnect switch before servicing unit.

IMPORTANT: Units should never be operated without a filter.

CAUTION

Equipment should never be used during construction due to likelihood of wall board dust accumulation in the air coil of the equipment which permanently affects the performance and may shorten the life of the equipment.

33

ensure amp draw is no more than 10% greater than indicated on serial plate data.

Condensate Drain Cleaning Clean the drain line and unit drain pan at the start of each cooling season. Check flow by pouring water into drain. Be sure trap is filled to maintain an air seal.

Air Coil Cleaning Remove dirt and debris from evaporator coil as required by condi- tion of the coil. A 10% solution of dishwasher detergent and water is recommended for cleaning both sides of the coil, followed by a thorough water rinse. Clean coil with a stiff brush, vacuum clean- er, or compressed air. Use a fin comb of the correct tooth spacing when straightening mashed or bent coil fins.

Condenser Cleaning Water-cooled condensers may require cleaning of scale (water de- posits) due to improperly maintained closed-loop water systems. Sludge build-up may need to be cleaned in an open water tower system due to induced contaminants. Local water conditions may cause excessive fouling or pitting of tubes. Condenser tubes should therefore be cleaned at least once a year, or more often if the water is contaminated. Proper water treatment can minimize tube fouling and pitting. If such conditions are anticipated, water treatment analysis is recom- mended. Refer to the Carrier System Design Manual, Part 5, for general water conditioning information.

Clean condensers with an inhibited hydrochloric acid solution. The acid can stain hands and clothing, damage concrete, and, without inhibitor, damage steel. Cover surroundings to guard against splashing. Vapors from vent pipe are not harmful, but take care to prevent liquid from being carried over by the gases. Warm solution acts faster, but cold solution is just as effective if applied for a longer period.

GRAVITY FLOW METHOD

Do not add solution faster than vent can exhaust the generated gases. When condenser is full, allow solution to remain overnight, then drain condenser and flush with clean water. Follow acid manufac- turers instructions. See Fig. 22.

Fig. 22 Gravity Flow Method

FORCED CIRCULATION METHOD

Fully open vent pipe when filling condenser. The vent may be closed when condenser is full and pump is operating. See Fig. 23. Regulate flow to condenser with a supply line valve. If pump is a non-overloading type, the valve may be fully closed while pump is running. For average scale deposit, allow solution to remain in condenser overnight. For heavy scale deposit, allow 24 hours. Drain condenser and flush with clean water. Follow acid manufacturers instructions.

Fig. 23 Forced Circulation Method

CAUTION

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

FILL CONDENSER WITH CLEANING SOLUTION. DO NOT ADD SOLUTION MORE RAPIDLY THAN VENT CAN EXHAUST GASES CAUSED BY CHEMICAL ACTION.

PAIL

FUNNEL

CONDENSER

PAIL

914 mm TO 1219.2 mm

VENT PIPE 1524 mm APPROX

25.4 mm PIPE

SUCTION

PUMP SUPPORT

TANK

FINE MESH SCREEN

RETURN

GAS VENTPUMP PRIMING CONN.

GLOBE VALVES

SUPPLY

25.4 mm PIPE

CONDENSER

REMOVE WATER REGULATING VALVE

34

Checking System Charge Units are shipped with full operating charge.

If recharging is necessary: 1. Insert thermometer bulb in insulating rubber sleeve on liquid

line near filter drier. Use a digital thermometer for all tem- perature measurements. DO NOT use a mercury or dial-type thermometer.

2. Connect pressure gage to discharge line near compressor.

3. After unit conditions have stabilized, read head pressure on discharge line gage.

NOTE: Operate unit a minimum of 15 minutes before check- ing charge.

4. From standard field-supplied Pressure-Temperature chart for R-410A, find equivalent saturated condensing temperature.

5. Read liquid line temperature on thermometer, then subtract from saturated condensing temperature. The difference equals subcooling temperature.

6. Compare the subcooling temperature with the normal tem- perature listed in Tables 17-27. If the measured liquid line temperature does not agree with the required liquid line tem- perature, ADD refrigerant to raise the temperature or REMOVE refrigerant (using standard practices) to lower the temperature (allow a tolerance of 1.668C).

Refrigerant Charging

NOTE: Do not vent or depressurize unit refrigerant to atmosphere. Remove and recover refrigerant following accepted practices. See Fig. 24.

Fig. 24 Refrigeration Piping Diagram

IMPORTANT: If the refrigerant charge is adjusted from the factory charge levels, it must be noted on the unit label and in related documentation as required by EU Regulation (517/2014).

WARNING

To prevent personal injury, wear safety glasses and gloves when handling refrigerant. Do not overcharge system this can cause compressor flooding.

LEGEND AP Access Port HPS High Pressure Switch Insulated piping (only if in BOM) LPS Low Pressure Switch * Test port for water regulating valve. ** Standard for some models only. *** Actual port position on suction and discharge lines might vary.

NOTE: All pilot and equalizer lies 1/4" OD

35

TROUBLESHOOTING When troubleshooting problems with a WSHP, consider the fol- lowing.

Thermistor A thermistor may be required for single-phase units where starting the unit is a problem due to low voltage. See Fig. 25.

Control Sensors The control system employs 2 nominal 10,000 ohm thermistors (FP1 and FP2) that are used for freeze protection. Be sure FP1 is located in the discharge fluid and FP2 is located in the air dis- charge. See Fig. 25.

Thermostatic Expansion Valves Thermostatic expansion valves (TXV) are used as a means of me- tering the refrigerant through the evaporator to achieve a preset su- perheat at the TXV sensing bulb. Correct superheat of the refriger- ant is important for the most efficient operation of the unit and for the life of the compressor. Packaged heat pumps typically use one bi-flow TXV to meter re- frigerant in both modes of operation. When diagnosing possible TXV problems it may be helpful to reverse the refrigerant flow to assist with the diagnosis. Geothermal and water source heat pumps are designed to operate through a wide range of entering-water temperatures that will have a direct effect on the unit refrigerant operating pressures. Therefore, diagnosing TXV problems can be difficult.

TXV FAILURE

The most common failure mode of a TXV is when the valve fails while closed. Typically, a TXV uses spring pressure to close the valve and an opposing pressure, usually from a diaphragm, to open the valve. The amount of pressure exerted by the diaphragm will vary, depending on the pressure inside of the sensing bulb. As

the temperature of and pressure within the bulb decreases, the valve will modulate closed and restrict the refrigerant flow through the valve. The result is less refrigerant in the evaporator and an increase in the superheat. As the temperature at the bulb increases the diaphragm pressure will increase, which opens the valve and allows more refrigerant flow and a reduction in the superheat. If the sensing bulb, connecting capillary, or diaphragm assembly are damaged, pressure is lost and the spring will force the valve to a closed position. Often, the TXV will not close completely so some refrigerant flow will remain, even if inadequate flow remains for the heat pump to operate. The TXV sensing bulb must be properly located, secured, and in- sulated as it will attempt to control the temperature of the line to which it is connected. The sensing bulb must be located on a dedi- cated suction line close to the compressor. On a packaged heat pump, the bulb may be located almost any place on the tube run- ning from the compressor suction inlet to the reversing valve. If the bulb is located on a horizontal section, it should be placed in the 10:00 or 2:00 position for optimal performance.

The bulb must be secured to the pipe using a copper strap. The use of heat transfer paste between the bulb and the pipe will also help ensure optimum performance. The bulb must also be properly insulated to eliminate any influ- ence on valve operation by the surrounding conditions. Cork tape is the recommended insulation as it can be molded tight to the bulb to prevent air infiltration.

Fig. 25 FP1 and FP2 Thermistor Location

CAUTION

Use caution when tightening the strap. The strap must be tight enough to hold the bulb securely but caution must be taken not to over-tighten the strap, which could dent, bend, collapse or otherwise damage the bulb.

SUCTION

COMPRESSOR

DISCHARGECOAXEXPANSION VALVE

FP2 FP1

LIQUID LINE WATER IN WATER OUT

CONDENSATE OVERFLOW

(CO)

AIR COIL FREEZE PROTECTION

WATER COIL PROTECTION

THERMISTOR

(C) (C)

AIR COILAIRFLOW AIRFLOW

LEGEND

COAX Coaxial Heat Exchanger Airflow Refrigerant Liquid Line Flow

36

Causes of TXV Failure 1. A cracked, broken, or damaged sensing bulb or capillary can

be caused by excessive vibration of the capillary during ship- ping or unit operation. If the sensing bulb is damaged or if the capillary is cracked or broken, the valve will be considered failed and must be replaced. Replacement of the TXV power head or sensing bulb, capillary, diaphragm assembly is possible on some TXVs. The power head assembly screws onto most valves, but not all are intended to be replaceable. If the assembly is not replaceable, replace the entire valve.

2. Particulate debris within the system can be caused by several sources including contaminated components, tubing, and ser- vice tools, or improper techniques used during brazing opera- tions and component replacement.

Problems associated with particulate debris can be com- pounded by refrigerant systems that use POE (polyol ester oil). POE oil has solvent-like properties that will clean the interior surfaces of tubing and components. Particulates can be released from interior surfaces and may migrate to the TXV strainer, which can lead to plugging of the strainer.

3. Corrosive debris within the system may happen after a fail- ure, such as a compressor burn out, if system was not prop- erly cleaned.

4. Non-condensables may be present in the system. Non- condensables includes any substance other than the refrigerant or oil such as air, nitrogen, or water. Contamination can be the result of improper service techniques, use of contaminated components, and/or improper evacuation of the system.

Symptoms The symptoms of a failed TXV can be varied and will include one or more of the following: Low refrigerant suction pressure High refrigerant superheat High refrigerant subcooling TXV and/or low pressure tubing frosting Equalizer line condensing and at a lower temperature than

the suction line or the equalizer line frosting FP1 faults in the heating mode in combination with any of

the symptoms listed above FP2 faults in the cooling mode in combination with any of

the symptoms listed above. Some symptoms can mimic a failed TXV but may actually be caused by another problem.

Before conducting an analysis for a failed TXV the following must be verified: Confirm that there is proper water flow and water tempera-

ture in the heating mode. Confirm that there is proper airflow and temperature in the

cooling mode. Ensure coaxial water coil is clean on the inside; this ap-

plies to the heating mode and may require a scale check. Refrigerant may be undercharged. To verify, subcooling

and superheat calculations may be required. Diagnostics Several tests may be required to determine if a TXV has failed. The following tools may be required for testing: 1. Refrigerant gage manifold compatible with the refrigerant in

the system. 2. Digital thermometer, preferably insulated, with wire leads

that can be connected directly to the tubing.

3. Refrigerant pressure-temperature chart for the refrigerant used.

To determine that a TXV has failed, verify the following: The suction pressure is low and the valve is non-

responsive. The TXV sensing bulb can be removed from the suction line and warmed by holding the bulb in your hand. This action should result in an increase in the suction pressure while the compressor is operating. The sensing bulb can also be chilled by immersion in ice water, which should result in a decrease in the suction pressure while the compressor is operating. No change in the suction pressure would indicate a non-responsive valve.

Simultaneous LOW suction pressure, HIGH refrigerant subcooling and HIGH superheat.

LOW suction pressure, LOW subcooling and HIGH super- heat may indicate an undercharge of refrigerant. HIGH subcooling and LOW superheat may indicate an over- charge of refrigerant. The suction pressure will usually be normal or high if there is an overcharge of refrigerant.

LOW suction pressure and frosting of the valve and/or equalizer line may indicate a failed valve. However, these symptoms may also indicate an undercharge of refrigerant. Calculate the subcooling and superheat to verify a failed valve or refrigerant charge issue.

Repair

WARNING

Puron refrigerant (R-410A) operates at higher pressure than R-22, which is found in other WSHPs. Tools such as manifold gages must be rated to withstand the higher pressures. Failure to use approved tools may result in a failure of tools, which can lead to severe damage to the unit, injury or death.

WARNING

Most TXVs are designed for a fixed superheat setting and are therefore considered non-adjustable. Removal of the bottom cap will not provide access for adjustment and can lead to damage to the valve or equipment, unintended venting of refrigerant, personal injury, or possibly death.

CAUTION

Always recover the refrigerant from the system with suitable approved tools, recovery equipment, and practices prior to attempting to remove or repair any TXV.

CAUTION

Use caution when tightening the strap. The strap must be tight enough to hold the bulb securely but caution must be taken not to over-tighten the strap, which could dent, bend, collapse or otherwise damage the bulb.

CAUTION

Puron refrigerant (R-410A) requires the use of synthetic lubricant (POE oil). Do not use common tools on systems that contain R-22 refrigerants or mineral oil. Contamination and failure of this equipment may result.

37

See Table 32 for additional troubleshooting information.

Disposal of Unit NOTE: If you want to dispose of this equipment, DO NOT use the ordinary trash receptacle! This product contains fluorinated green- house gases and lead. In the European Union used electrical and electronic equipment must be treated separately and in accordance with legislation that requires proper treatment, recovery and recycling of used electri- cal and electronic equipment. Following the implementation by member states, private house- holds within the EU states may return their used electrical and electronic equipment to designated collection facilities, free of charge. In some countries, your local retailer may also take back your old products free of charge, if you purchase a similar new unit. If your used electrical or electronic equipment has batteries or ac- cumulators, please dispose of these separately beforehand accord- ing to local requirements. By disposing of this product correctly you will help ensure that the waste undergoes the necessary treatment, recovery and recycling, thus preventing potential negative effects on the environment and human health which could otherwise arise due to inappropriate waste handling. Please contact your local authority for further details.

IMPORTANT: Due to the hygroscopic nature of the POE oil in Puron refrigerant (R-410A) and other environmentally balanced refrigerants, any component replacement must be conducted in a timely manner using caution and proper service procedure for these types of refrigerants. A complete installation instruction will be included with each replacement TXV/filter drier assembly. It is of critical importance these instructions are carefully understood and followed. Failure to follow these instructions can result in a system that is contaminated with moisture to the extent that several filter drier replacements may be required to properly dry the system.

IMPORTANT: Repair of any sealed refrigerant system requires training in the use of refrigeration tools and proce- dures. Repair should only be attempted by a qualified service technician. A universal refrigerant handling certificate will be required. Local and/or state license or certificate may also be required.

CAUTION

Disconnect power from unit before removing or replacing connectors, or servicing motor. Wait 5 minutes after discon- necting power before opening motor.

38

Table 32 Troubleshooting

FAULT COOLING HEATING CHECK POSSIBLE CAUSE SOLUTION

No Compressor Operation but Fan Runs

X

Is fault LED Blinking 1 time?

High Pressure fault - no or low water flow

Check water valves and/or pumps for proper operation. Check for water coil blockage.

High Pressure fault - high water temperature Check water temperature - is it in range?

High Pressure fault - fouled or scaled water coil

Check for proper flow rate and water temperature, but low water side temp rise in cooling.

X High Pressure fault - no or low airflow

Check fan motor for proper operation. Check air filter. Inspect air coil for dirt/debris. Check ductwork - are dampers closed or blocked?

X

Is fault LED Blinking 2 times?

Low Pressure fault - no or low airflow

Check fan motor for proper operation. Check air filter Inspect air coil for dirt/debris Check ductwork - are dampers closed or blocked?

Low Pressure fault - low refrig- erant

Check refrigerant pressure with gage set

X

Low Pressure fault - no or low water flow

Check water valves and/or pumps for proper operation. Check for water coil blockage.

Low Pressure fault - low refrig- erant

Check for proper flow rate and water temperature, but low water side temp drop in heating.

X Is fault LED Blinking 3 times?

Freeze fault, water coil - no or low water flow

Check water valves and/or pumps for proper operation. Check for water coil blockage.

Freeze fault - low water tem- perature

Check water temperature - is it below 4.4C entering? If heat pump is connected to a closed loop with antifreeze check that the "FREEZE 1" resistor on the UPM has been cut to set the unit to antifreeze mode.

Freeze fault - low refrigerant Check refrigerant pressure with gage set

X Is fault LED

Blinking 4 times?

Condensate fault - poor drain- age

Check condensate pan for high water level. Check drain line for blockages, double trapping or inadequate trapping.

Condensate fault - blocked return air

Check condensate pan for high water level. Check air filter and return air ductwork for blockage. Check that there is adequate space between the return air opening and walls or other obstructions on free return applica- tions.

X X Is fault LED Blinking 5 times?

Brown out fault - low supply voltage

Check primary voltage - ensure it is within the limits listed on the unit data plate.

Brown out fault - overloaded control circuit

Check control voltage - if it is below 18 V check acces- sories connected to the unit and insure that they do not exceed the VA draw shown on page 14.

Brown out fault - bad thermostat connection

Check that thermostat wiring is proper gage and length, that it is not damaged and that all connections at the thermostat and heat pump are secure.

X Is fault LED Blinking 6 times?

Freeze fault, air coil - no or low airflow

Check fan motor for proper operation. Check air filter Inspect air coil for dirt/debris Check ductwork - are dampers closed or blocked?

Freeze fault, air coil - blocked return air

Check that there is adequate space between the return air opening and walls or other obstructions on free return applications.

Freeze fault, air coil - low refrig- erant

Check refrigerant pressure with gage set.

X X No fault LED - contactor not

energized

Thermostat not calling for com- pressor operation

Ensure that the thermostat is on and calling for "Y".

Bad thermostat connection Check "Y" connection from thermostat. Ensure that there is 24 VAC between "Y" and "C".

Loose wire to contactor coil Check wiring - ensure that there is 24 VAC across the contactor coil.

Burned out contactor coil Test contactor with 24VAC (between "R" and "C"). Ohm contactor coil - an open circuit indicates a burned coil.

X X No fault LED - contactor energized

Open compressor overload

Check for supply voltage at the load side of the contac- tor. For 3 phase models check phase rotation and volt- age at all 3 phases.

Poor wiring connections Look for signs of heat on the wiring insulation. Check that all wiring connections are secure and properly torqued.

Burned out compressor Does compressor hum when power is applied? If not check the resistance of the compressor windings using the values shown in the compressor characteristics chart. Note that the compressor must be cool (21.1C) when checking the windings.

39

Table 32 Troubleshooting (cont)

FAULT COOLING HEATING CHECK POSSIBLE CAUSE SOLUTION

No compressor or fan operation X X

Power LED on Bad thermostat connection / faulty thermostat

Check thermostat and wiring. Check unit terminal block for 24 VAC between "Y" and "C" and "G" and "C".

Power LED off

Low or no supply power Ensure that the supply voltage to the unit is with in the range shown on the unit data plate.

Faulty control transformer

Check for 24 VAC between "R" and "C" on the unit ter- minal block. For 75 and 100 VA transformers, check that the transformer circuit breaker has not tripped. Check low voltage circuit for overload conditions or short circuits before replacing the transformer.

No fan operation - PSC motor X X

Fan relay energized Faulty motor

Check supply voltage from the fan relay to the motor. Check that all motor wires are secure. With power off spin the motor shaft - noise, resistance or uneven motion can be signs of motor failure.

Fan relay not energized

No fan operation signal Check for 24 VAC across the fan relay coil. Check all wiring connections.

Bad fan relay If the relay coil is energized but the relay does not pull in, check the resistance across the relay coil - an open circuit is an indicator of a faulty relay.

No fan operation - constant torque motor X X

No fan operation signal Check for 24 VAC between "G" and "C". Check all wir- ing connections.

Loose wiring Check all wiring connections at motor and control box. Faulty motor Check supply voltage to the motor. Check that all motor

wires are secure. With power off spin the motor shaft - noise, resistance or uneven motion can be signs of motor failure.

No fan operation - constant airflow motor X X

No fan operation signal Check for 24 VAC between "G" and "C". Check all wir- ing connections. Make sure that the thermostat con- nection plug is securely connected.

Loose wiring Check all wiring connections at motor and control box. Check that power and control harnesses are securely connected.

Interface board problems Make sure that the interface board is not damaged and that all DIP switches are in the proper configuration (refer to the blower performance tables).

Faulty motor Check supply voltage to the motor. Check that all motor wires are secure. Move the "TEST" DIP switch to "ON" and the other switches to "OFF" on the "ADJUST" switch block on the interface board - the motor should run at 70% torque when "G" is called. With power off spin the motor shaft - noise, resistance or uneven motion can be signs of motor failure.

Unit not shifting into cooling X

Reversing valve solenoid energized

Faulty solenoid Check that the reversing valve solenoid is receiving 24 VAC. If so, check the resistance of the solenoid - an open circuit may indicate a burned out solenoid.

Reversing valve solenoid not energized

Miswired/faulty thermostat

Check that the reversing valve thermostat wire is con- nected to the "O" terminal of the thermostat. Check for a contact closure between "O" and "R".

Loose wire on "O" terminal

Check that the wires from the thermostat to the unit are securely connected and that the wires from the electri- cal box to the reversing valve are connected.

Excessively cold supply air temperature in cooling or excessively hot supply air temperature in heating

X X Reduced airflow

Dirty Filter Replace filter. Fan speed too low Consult blower performance table and increase fan

speed if possible. Excessive duct pressure drop Consult blower performance table and increase fan

speed if possible.

Excessively warm supply air temperature in cooling and/or excessively cool air in heating

X X

Airflow too high Fan speed setting too high Consult blower performance table and reduce fan speed if possible.

High or low water temperature

Inlet water temperature out of range

Check unit capacity vs. water temperature.

Air leakage Leaky ductwork Inspect ductwork. Loss of refrigeration

capacity Low refrigerant Check refrigerant pressures with gage set.

High humidity X

Airflow too high Fan speed setting too high

Consult blower performance table and reduce fan speed if possible.

Loss of refrigeration capacity

Low refrigerant Check refrigerant pressures with gage set.

Short cycling

Unit oversized Check unit performance against building load calcula- tions.

Poor thermostat location Make sure that thermostat is not located by a supply- air duct.

Table 32 Troubleshooting (cont)

FAULT COOLING HEATING CHECK POSSIBLE CAUSE SOLUTION

High humidity X

Airflow too high Fan speed setting too high

Consult blower performance table and reduce fan speed if possible.

Loss of refrigeration capacity Low refrigerant Check refrigerant pressures with gage set.

Short cycling Unit oversized Check unit performance against building load

calculations.

Poor thermostat location Make sure that thermostat is not located by a supply- air duct.

Objectionable noise levels

X X

Air noise

Poor ductwork/grille design Ensure ductwork and grilles are properly sized for unit airflow.

Fan speed setting too high Consult blower performance table and reduce fan speed if possible.

Structure-borne noise

Unit not mounted on full vibra- tion pad Mount unit on a vibration pad.

Unit not connected with flexible conduit, water lines and/or ductwork

Install unit in accordance with instructions.

Unit cabinet touching wall or other building component

Adjust unit location to avoid unit touching structure.

X Compressor noise

High water temperature or low water flow rate elevating head pressure

Increase water flow rate and/or reduce water tempera- ture if possible.

Scaled or fouled water coil ele- vating heat pressure

Clean/descale water coil.

X Low airflow elevating head pressure

Check filter. Increase fan speed.

X X Water hammer Fast closing valves installed Change valves to slow-close type.

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500286-01 Printed in U.S.A. Form 50PC-C4SI Pg 42 4-21 Replaces: 50PC-C3SI

2021 Carrier

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500286-01 Printed in U.S.A. Form 50PC-C4SI Pg CL-1 4-21 Replaces: 50PC-C3SI

50PCH START-UP CHECKLIST

CUSTOMER: ______________________________ JOB NAME: _____________________________________________

MODEL NO.: ______________________________ SERIAL NO.:_______________________ DATE: __________

I. PRE-START-UP

DOES THE UNIT VOLTAGE CORRESPOND WITH THE SUPPLY VOLTAGE AVAILABLE? (Y/N)

HAVE THE POWER AND CONTROL WIRING CONNECTIONS BEEN MADE AND TERMINALS TIGHT? (Y/N)

HAVE WATER CONNECTIONS BEEN MADE AND IS FLUID AVAILABLE AT HEAT EXCHANGER? (Y/N)

HAS PUMP BEEN TURNED ON AND ARE ISOLATION VALVES OPEN? (Y/N)

HAS CONDENSATE CONNECTION BEEN MADE AND IS A TRAP INSTALLED? (Y/N)

IS AN AIR FILTER INSTALLED? (Y/N)

II. START-UP

IS FAN OPERATING WHEN COMPRESSOR OPERATES? (Y/N)

IF 3-PHASE SCROLL COMPRESSOR IS PRESENT, VERIFY PROPER ROTATION PER INSTRUCTIONS. (Y/N)

UNIT VOLTAGE COOLING OPERATION

PHASE AB VOLTS PHASE BC VOLTS PHASE CA VOLTS (if 3 phase) (if 3 phase)

PHASE AB AMPS PHASE BC AMPS PHASE CA AMPS (if 3 phase) (if 3 phase)

CONTROL VOLTAGE

IS CONTROL VOLTAGE ABOVE 21.6 VOLTS? (Y/N) . IF NOT, CHECK FOR PROPER TRANSFORMER CONNECTION.

TEMPERATURES

FILL IN THE ANALYSIS CHART ATTACHED.

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 sections of this Installation, Start-Up, and Service Instructions document.

COAXIAL HEAT EXCHANGER COOLING CYCLE: FLUID IN C FLUID OUT C kPa FLOW

HEATING CYCLE: FLUID IN C FLUID OUT C kPa FLOW

AIR COIL COOLING CYCLE: AIR IN C AIR OUT C

HEATING CYCLE: AIR IN C AIR OUT C

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500286-01 Printed in U.S.A. Form 50PC-C4SI Pg CL-2 4-21 Replaces: 50PC-C3SI

2021 Carrier

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HEATING CYCLE ANALYSIS

COOLING CYCLE ANALYSIS

HEAT OF EXTRACTION (ABSORPTION) OR HEAT OF REJECTION =

FLOW RATE (L/S) x TEMP. DIFF. (DEG. C) x FLUID FACTOR* = (Btu/hr)

SUPERHEAT = SUCTION TEMPERATURE SUCTION SATURATION TEMPERATURE = (DEG. C)

SUBCOOLING = DISCHARGE SATURATION TEMPERATURE LIQUID LINE TEMPERATURE = (DEG. C)

*Use 500 for water, 485 for antifreeze.

SUCTION

COMPRESSOR

DISCHARGECOAXEXPANSION VALVE

C C

AIR COIL

C

kPa WATER OUTWATER IN

C

kPa

LOOK UP PRESSURE DROP IN TABLE 28 TO DETERMINE FLOW RATE

C

LIQUID LINE

kPa

C

SAT

SUCTION

COMPRESSOR

DISCHARGE COAX EXP ANSION VA LV E

C C

AI R COI L

C

kPa WA TER OUT WA TER IN

C

kPa

LOOK UP PRESSURE DROP IN T ABLE 28 TO DETERMINE FLOW RA TE

C

LIQUID LIN E

kPa

C

SA T

8-733-955-49

Manualsnet FAQs

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