Carrier CHS072-121 Installation Instructions Manual
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Carrier CHS072-121 Installation Instructions Manual

Carrier CHS072-121 Installation Instructions Manual

Heat pump condensing units with r-410a refrigerant
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Installation, Start-Up and Service Instructions
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . 2
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Rated Indoor Airflow (cfm) . . . . . . . . . . . . . . . . . 2
INSTALLATION GUIDELINE . . . . . . . . . . . . . . . . 3
Refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Jobsite Survey . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Step 1 - Plan for Unit Location . . . . . . . . . . . . 8
Step 4 - Rig and Mount the Unit . . . . . . . . . . . 8
Connections . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Check Vertical Separation . . . . . . . . . . . . . . . . 10
Provide Safety Relief . . . . . . . . . . . . . . . . . . . . 10
Refrigerant Line Sizing . . . . . . . . . . . . . . . . . . . 10
Make Piping Connections . . . . . . . . . . . . . . . . 11
Evacuation/Dehydration . . . . . . . . . . . . . . . . . . 12
Preliminary Charge . . . . . . . . . . . . . . . . . . . . . . 12
Step 6 - Install Accessories . . . . . . . . . . . . . . 12
Convenience Outlets . . . . . . . . . . . . . . . . . . . . 14
Installing Weatherproof Cover . . . . . . . . . . . . 14
Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . 17
System Check . . . . . . . . . . . . . . . . . . . . . . . . . . 17
CHS072-121
Heat Pump Condensing Units
with R-410A Refrigerant
Page
CHS-072-121-01SI
Turn On Crankcase Heater . . . . . . . . . . . . . . . 17
Preliminary Charge . . . . . . . . . . . . . . . . . . . . . 17
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
CHS Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
OPERATING SEQUENCE . . . . . . . . . . . . . . . . . 21
Base Unit Controls . . . . . . . . . . . . . . . . . . . . . . 21
ROUTINE SYSTEM MAINTENANCE . . . . . . . . 23
(and 30 days after initial start) . . . . . . . . . . . 23
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . 23
Quarterly Inspection
(and 30 days after initial start) . . . . . . . . . . . 23
• INDOOR SECTION
Seasonal Maintenance . . . . . . . . . . . . . . . . . . . 23
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Refrigeration System . . . . . . . . . . . . . . . . . . . . 24
Compressor Protection . . . . . . . . . . . . . . . . . . 27
TION (IP)
2-23

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Summary of Contents for Carrier CHS072-121

  • Page 1: Table Of Contents

    CHS072-121 Heat Pump Condensing Units with R-410A Refrigerant Installation, Start-Up and Service Instructions CONTENTS Turn On Crankcase Heater ....17 Preliminary Charge ..... 17 Page START-UP .

  • Page 2: Safety Considerations

    Commercial Defrost Control ....27 WARNING • REVERSING VALVE CONTROL • COMPRESSOR CONTROL ELECTRICAL SHOCK HAZARD • DEFROST Failure to follow this warning could cause personal injury •...

  • Page 3: Installation Guideline

    INSTALLATION GUIDELINE riser sizes as oil return at part load conditions in vertical ris- es may be an issue. Replace any riser sections with re- Replacement /Retrofit — R-22 to R-410A Refrigerant duced pipe sizes if existing pipe sizes exceed these maxi- mum tube size limits.
  • Page 4 Fig. 1 — CHS072-121 Unit Dimensions...
  • Page 5 24 (609.6) 23 (584.2) 50-3/8 (1279.2) CHS121 21 (533.4) 24 (609.6) 23 (584.2) 50-3/8 (1279.2) Table 3 — Physical Data — CHS072-121 Units — 60 Hz English UNIT CHS072*G/H CHS091*M/N CHS121*G/H Nominal Capacity (tons) Operating Weights (lb) Aluminum-Fin Coils Refrigeration System...
  • Page 6 Table 4 — Physical Data — CHS072-121 Units — 60 Hz SI UNIT CHS072*G/H CHS091*M/N CHS121*G/H Nominal Capacity (kW) 21.1 26.4 35.1 Operating Weights (kg) Aluminum-Fin Coils Refrigeration System R-410A R-410A R-410A No. Circuits / No. Comp. / Type 1 / 1 / Scroll...
  • Page 7 MODEL SERIES Position Number C = R-410A Condensing Unit H = Heat Pump Type S = Standard ASHRAE 90.1-2016 Efficiency 072 = 6 Tons (1 circuit, 2-stage cooling) 091 = 7.5 Tons (1 circuit, 2-stage cooling) Nominal 121 = 10 Tons (1 circuit, 2-stage cooling) Cooling Capacity H = 208/230-3-60 L = 460-3-60...

  • Page 8: Installation

    INSTALLATION INSPECT SHIPMENT File a claim with shipping company if the shipment is dam- Jobsite Survey aged or incomplete. Complete the following checks before installation. CONSIDER SYSTEM REQUIREMENTS 1. Consult local building codes and the NEC (National Electrical Code) ANSI/NFPA 70 for special installa- •...
  • Page 9 Table 5 — CHS072-121 Piping Recommendations (Single-Circuit Unit) R-410A EQUIVALENT LENGTH (ft) Length Linear 0-24 25-49 50-74 75-100 Model Nominal Capacity Length Equiv 0-37 38-74 75-112 113-150 Liquid Line (in.) Max Lift Cool CHS072*G/H Max Lift Heat Suction Line (in.)

  • Page 10: Check Vertical Separation

    Check Vertical Separation Table 6 — Maximum Vapor Line Sizes If there is any vertical separation between the indoor and CHS UNIT CHS UNIT outdoor units, check to ensure that the separation is within BELOW ID UNIT ABOVE ID UNIT CHS UNIT allowable limits.

  • Page 11: Install Liquid Line Solenoid Valves

    Install Liquid Line Solenoid Valves The stub tube connections include 1/4 in. SAE service fit- tings with Schrader valve cores (see Fig. 6). Before making It is recommended that a bi-directional solenoid valve be any brazed connections to the unit service valves, remove placed in the main liquid line (see Fig.

  • Page 12: Evacuation/Dehydration

    Evacuation/Dehydration Table 10 — Minimum Outdoor Air Operating Temperature Evacuate and dehydrate the connected refrigeration sys- tem(s) (excluding the CHS unit) to 500 microns using a two- MINIMUM OUTDOOR stage vacuum pump attached to the service ports outside PERCENT TEMP, °F (°C) the CHS service valves, following description in GTAC II, UNIT COMPRESSOR...

  • Page 13: Units Without Factory-Installed Disconnect

    Units Without Disconnect Option WARNING FIRE HAZARD Failure to follow this warning could result in intermittent operation or performance satisfaction. Do not connect aluminum wire between disconnect switch and condensing unit. Use only copper wire. (See Disconnect Fig. 7.) 208/230-3-60 460-3-60 575-3-60 Electric...

  • Page 14: Convenience Outlets

    Convenience Outlets WARNING ELECTRICAL OPERATION HAZARD Failure to follow this warning could result in personal inju- ry or death. Units with convenience outlet circuits may use multiple disconnects. Check convenience outlet for power status before opining unit for service. Locate its disconnect switch, if appropriate, and open it.

  • Page 15: Field Control Wiring

    align with the gasket; tighten the two screws until snug (do lead is required between the indoor unit connection board not overtighten). and the thermostat for terminal G. If the accessory electric heat is used, one additional wire is required between the in- Mount the weatherproof cover to the backing plate as door unit connection board and the thermostat for terminal shown in Fig.
  • Page 16 Table 11 — Electrical Data — CHS072-121 60 Hz Units NOMINAL COMPRESSOR WITHOUT POWERED CONVENIENCE OUTLET VOLTAGE POWER RANGE No. 1 No. 2 OFM (ea) Power Supply Disconnect Size SUPPLY UNIT Fuse or V-Ph-Hz HACR Brkr 208/230-3-60 17.5 — —...

  • Page 17: Step 8 - Wind Baffles For Low Ambient

    Step 8 — Wind Baffles for Low Ambient and 4 on page 5). Allow high and low side pressures to equalize before starting compressor. If pressures do not Control equalize readily, charge vapor on low side of system to CHS****H and CHS****N units includes the factory installed assure charge in the evaporator.

  • Page 18: Compressor Overload

    COMPRESSOR OVERLOAD To manually reset ASTP, the compressor should be stopped and allowed to cool. If the compressor is not stopped, the This overload interrupts power to the compressor when ei- motor will run until the motor protector trips, which occurs up ther the current or internal motor winding temperature be- to 90 minutes later.
  • Page 19 6 TON HEAT PUMP DUAL STAGE CHARGING CHART R-410A (COMPRESSOR FULL LOAD, ALL CONDENSER FANS OPERATING) Add Charge if Above the Curve Rem ove Charge if Below the Curve –6 1050 1400 1750 2100 2450 2800 3150 3500 3850 Pressure at Liquid Valve (PSIG / Kpa) PN: 38AU000485 REV - Fig.
  • Page 20 7.5 Ton Dual Stage Heat Pump Charging Chart R-410A Refrigerant Add Charge if Above the Curve Rem ove Charge if Below the Curve –6 1050 1400 1750 2100 2450 2800 3150 3500 3850 Pressure at Liquid Valve (PSIG / Kpa) 38AU000063 Fig.

  • Page 21: Operating Sequence

    10 Ton Heat Pump Dual Stage Charging Chart R-410A (compressor full load, all condenser fans operating) PN: 38AU000486 REV - Fig. 17 — CHS121*G/H Charging Chart OPERATING SEQUENCE conjunction with a two-stage Comfort Alert Module (CADM). The CHS121*G/H uses two compressors in tandem on a Base Unit Controls single circuit in conjunction with two single-stage Comfort Alert Modules (CADM).

  • Page 22: Fan Cycling

    When thermostat calls for Stage 2 Cooling, terminal Y2 is sensed at CADM terminal Y but no current is measured at energized. The CHS unit’s Defrost Board (DFB) receives T1, T2, T3 motor sensors); CADM relay opens and RED this input at P2-4. DFB issues 24-v outputs at OF, P3-8 LED is illuminated.

  • Page 23: Supplemental Heat/Emergency Heat

    If the outdoor coil’s Defrost Thermostat switch (DFT) is OUTDOOR SECTION closed (shorting DFB terminals DFT1 and DFT1), the De- • Fan motor mounting bolts tightness frost cycle will start. Output at OF is removed; outdoor fans • Compressor mounting bolts stop during the Defrost cycle.

  • Page 24: Service

    SERVICE Table 12 — Outdoor Unit Maintenance Checklist Refrigeration System RECOMMENDED MAINTENANCE CHECKLIST INTERVAL Outdoor unit specific: Monthly Annual CAUTION Clear away debris and vegetation near unit. Inspect cabinet for damage. Replace EQUIPMENT DAMAGE HAZARD components that are damaged or severely rusted.

  • Page 25: Field Refrigerant Access Ports

    When removing a filter drier, use a tubing cutter to cut the drier from the system. Do not unsweat a filter drier from the Outdoor Fan 2 system. Heat from unsweating will release moisture and contaminants from drier into system. Outdoor Fan 1 FIELD REFRIGERANT ACCESS PORTS Field service access to refrigerant pressures is through the...

  • Page 26: Outdoor Coil Metering Devices

    OUTDOOR COIL METERING DEVICES Outdoor Coil The metering devices are multiple fixed-bore devices (Acutrol ™1 ) swaged into the horizontal outlet tubes from the Defrost liquid header, located at the entrance to each outdoor coil Thermostat circuit path. These are non-adjustable. Service requires re- (DFT) placing the entire liquid header assembly.

  • Page 27: Compressor Protection

    Compressor Protection COMPRESSOR OVERCURRENT The compressor has internal limbered motor protection. COMPRESSOR OVERTEMPERATURE PROTECTION (IP) The compressor has an internal protector to protect it against excessively high discharge gas temperatures. CRANKCASE HEATER The heater prevents refrigerant migration and compressor oil dilution during shutdown whenever compressor is not op- Defrost erating.
  • Page 28 Table 14 — CHS Defrost Board I/O and Jumper Configurations CONNECTION PIN POINT NAMES TYPE OF I/O UNIT CONNECTION NOTE NUMBER INPUTS G Fan DI, 24-vac P2-3 Not used Y1 Cool 1 DI, 24-vac P2-5 TB-Y1 W1 Heat 1 DI, 24-vac P2-7 TB-W1 Y2 Cool 2...

  • Page 29: Reversing Valve Control

    Fig. 28 — DIP Switch Settings — Defrost Board At the end of the continuous run period, the defrost control will test for a need to defrost. DFT1 controls the start and termination of the defrost cycle. If DFT1 is still open, the de- frost test/run window is closed and the control repeats the continuous run period.

  • Page 30: Defrost Speedup Functions

    DEFROST SPEEDUP FUNCTIONS cycle using these reduced time periods. This mode ends af- ter the Defrost cycle. The DFB permits the servicer to speed-up the defrost cycle. Shorting the jumpers for a period of 5 to 20 secs bypasses There are two speed-up sequences: relative speed-up and the remaining continuous run period and places the unit in a an immediate forced defrost.

  • Page 31: Comfort Alert Diagnostic Module

    COMFORT ALERT DIAGNOSTIC MODULE Power The Comfort Alert Diagnostic Module (CADM) monitors and (GRN) Comfort Alert ™ analyzes data from the Copeland Scroll ® three-phase Commercial Diagnostics POWER compressor and the thermostat demand. The CADM also Green LED - 24VAC Power Yellow LED - Flash Code System Pressure Trip provides a 3-minute anti-recycle time delay to compressor...
  • Page 32 Table 17 — LED Status Codes STATUS LED STATUS LED STATUS LED DESCRIPTION TROUBLESHOOTING INFORMATION Green “POWER” Module has power Supply voltage is present at module terminals 1. Compressor protector is open 2. Condensing unit power disconnect is open Thermostat demand signal Y is present, but 3.

  • Page 33: Outdoor Fans

    Table 18 — CADM Troubleshooting MISWIRED MODULE INDICATION RECOMMENDED TROUBLESHOOTING ACTION Determine if both R and C module terminals are connected. Verify voltage in present at module’s R and C terminals. NOTE: The CADM requires a constant nominal 24VAC power supply. The wiring to the Green LED is not on, module does not power up module’s R and C terminals must be directly from the control transformer.

  • Page 34: Routine Cleaning Of Indoor Coil Surfaces

    ROUTINE CLEANING OF INDOOR COIL SURFACES Periodic cleaning with Totaline environmentally sound coil ® CAUTION cleaner is essential to extend the life of coils. This cleaner is available from Fast Parts as P/N 1178704 for one gallon UNIT DAMAGE HAZARD container, and part number 1178705 for a 5 gallon contain- Failure to follow this caution may result in corrosion and er.

  • Page 35: Fastener Torque Values

    Totaline Environmentally Sound Coil Cleaner Appli- 5. Mix Totaline environmentally sound coil cleaner in a cation Instructions: 2-1/2 gallon garden sprayer according to the instruc- tions included with the cleaner. The optimum solution NOTE: Proper eye protection such as safety glasses is rec- temperature is 100°F (38°C).

  • Page 36: Troubleshooting

    TROUBLESHOOTING PROBLEM CAUSE REMEDY Power failure. Call power company. Replace fuse or reset circuit breaker. Determine root Fuse blown or circuit breaker tripped. cause. Defective thermostat, contactor, transformer, control Replace component. relay, or capacitor. Insufficient line voltage. Determine cause and correct. Incorrect or faulty wiring.

  • Page 37: Appendix A - Air Conditioner And Heat Pump With R-410A - Quick Reference Guide

    APPENDIX A — AIR CONDITIONER AND HEAT PUMP WITH R-410A — QUICK REFERENCE GUIDE • R-410A refrigerant operates at 50 percent to • POE oils may cause damage to certain plastics and 70 percent higher pressures than R-22. Be sure that roofing materials.
  • Page 38 APPENDIX B — WIRING DIAGRAM LIST (CONT) Fig. A — CHS072*G/H Single Circuit / Two Stage Wiring Diagram (208/230, 460-3-60 shown) CHS-072-121-01SI Specifications subject to change without notice.
  • Page 39 APPENDIX B — WIRING DIAGRAM LIST (CONT) Fig. B — CHS072*G/H Single Circuit / Two Stage Wiring Diagram (575-3-60 shown) CHS-072-121-01SI Specifications subject to change without notice.
  • Page 40 APPENDIX B — WIRING DIAGRAM LIST (CONT) Fig. C — CHS091*M/N Single Circuit / Two Stage Wiring Diagram (208/230-3-60 shown) CHS-072-121-01SI Specifications subject to change without notice.
  • Page 41 APPENDIX B — WIRING DIAGRAM LIST (CONT) Fig. D — CHS091*M/N Single Circuit / Two Stage Wiring Diagram (460-3-60 shown) CHS-072-121-01SI Specifications subject to change without notice.
  • Page 42 APPENDIX B — WIRING DIAGRAM LIST (CONT) Fig. E — CHS091*M/N Single Circuit / Two Stage Wiring Diagram (575-3-60 shown) CHS-072-121-01SI Specifications subject to change without notice.
  • Page 43 APPENDIX B — WIRING DIAGRAM LIST (CONT) Fig. F — CHS121*G/H Single Circuit / Two Stage Wiring Diagram (208/230, 460-3-60 shown) CHS-072-121-01SI Specifications subject to change without notice.
  • Page 44 APPENDIX B — WIRING DIAGRAM LIST (CONT) Fig. G — CHS121*G/H Single Circuit / Two Stage Wiring Diagram (575-3-60 shown) CHS-072-121-01SI Specifications subject to change without notice.

  • Page 45: Appendix C - Low Ambient Option - Factory Installed

    APPENDIX C — LOW AMBIENT OPTION — FACTORY INSTALLED TROUBLESHOOTING Units with the factory installed low ambient option are equipped with a solid-state head pressure control which regulates fan speed. A temperature sensor, mounted on cir- OBSERVATION POSSIBLE REMEDY cuit 1 of the outdoor coil (see Fig. H), controls the speed of Check power and wiring.
  • Page 46 APPENDIX C — LOW AMBIENT OPTION — FACTORY INSTALLED (CONT) Low ambient sensor must be positioned Low ambient sensor on vapor stub Low ambient sensor must be positioned (fourth from top) must be positioned on vapor stub between (fourth from top) metering device (second from top) and tube sheet...
  • Page 47 APPENDIX C — LOW AMBIENT OPTION — FACTORY INSTALLED (CONT) Fig. I — Wind Baffles CHS-072-121-01SI Specifications subject to change without notice.
  • Page 50 © 2023 Carrier Lewisburg, TN 37091 USA Replaces: NEW CHS-072-121-01SI Specifications are subject to change without notice.

  • Page 51: Start-Up Checklist

    START-UP CHECKLIST FOR CHS072-121 HEAT PUMP CONDENSING UNIT (Remove and use for job file) 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 Instruction document.
  • Page 52 ________________________________________________________________________________________________ ________________________________________________________________________________________________ ________________________________________________________________________________________________ ________________________________________________________________________________________________ ________________________________________________________________________________________________ ________________________________________________________________________________________________ ________________________________________________________________________________________________ ________________________________________________________________________________________________ ________________________________________________________________________________________________ ________________________________________________________________________________________________ ________________________________________________________________________________________________ ________________________________________________________________________________________________ ________________________________________________________________________________________________ ________________________________________________________________________________________________ ________________________________________________________________________________________________ ________________________________________________________________________________________________ ________________________________________________________________________________________________ ________________________________________________________________________________________________ ________________________________________________________________________________________________ ________________________________________________________________________________________________ ________________________________________________________________________________________________ © 2023 Carrier Lewisburg, TN 37091 USA Replaces: NEW CHS-072-121-01SI CL-2 Specifications are subject to change without notice. 2-23...

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