Carrier WEATHERMASTER III 38HQ- Manuals

Page 3 - Carrier-approved unit combinations in system. See

Table 3 — Heater Airflow Data INDOOR COMPRESSOR SECTION HEATER MINIMUM ALLOWABLE SIZE Airflow (cfm) Fan Speed 38HQ227 8 thru 20 kw (40FQ91 6010 thru 090) 1150 Low 38HQ234 10 thru 25 kw (40FQ920060 thru 1 50) 1550 Low PART NO. 38CQ900102 38CQ900122 38CQ900132 38CQ900152 38CQ900172 38HQ900011 38HQ9000...

Page 5 - Fig. 5 — Refrigerant Piping Connections

Step 3 — Install Indoor Compressor Section on a level, rigid, solid platform or concrete floor. Do not install in a living area. Insert 1/4-in. asphalt-impregnated felt pad (supplied) between unit basepan and mounting surface to provide full unit support and vibration attenuation. (Do not use vibrat...

Page 7 - Fig. 7 — Control Circuit Connections

FAN CONTROL PACKAGE C-2 IFR PL SEQ TBTran o LEGEND Contactor Indoor Fan Relay Plug, Fan Sequencer Terminal Board Transformer Junction Component Connection (Marked) Field Splice Field Power Wiring Field Ground Wiring Field Control Wiring NOTES; 1 2 Use copper conductors only. May be terminal board or...

Page 9 - Fig. 8 — Line Power Connections

FACTORY WIRING Fig. 8 — Line Power Connections INSTALL A BRANCH CIRCUIT DISCONNECT PER N.E.C. of adequate size to handle compressor section starting current. Provide a separate disconnect switch for outdoor coil section. Provide a separate disconnect for indoor fan-coil and for each accessory elect...

Page 10 - Unit Controls and Safety Devices

sor no. 1 starts. At the same time, the outdoor fan motor (OFM) starts and the defrost timer (DT) is energized although it is not functional in the cooling mode; the indoor fan relay (IFR) is energized and the indoor fan motor (IFM) starts. Compressor no. 2 does not run in COOL mode. When the second...

Page 11 - Fig. 9 — Refrigerant Flow Diagrams

defrost thermostat contacts will open to terminate defrosting before 10 minutes have elapsed. The defrost thermostat contacts open at 80 (± 6) F liquid refrigerant temperature. When defrosting is terminated, the outdoor fan motor is energized and the reversing valve solenoid is de-energized returni...

Page 14 - Fig. 14 — Component Location

Compressor Removal — See Table 2 for com pressor information; Fig. 14 for component loca tion. Shut off power to unit. Remove refrigerant from system using refrigerant removal methods described in Carrier Standard Service Techniques Manual, Chapter 1, Refrigerants. Follow safety codes, and wear sa...

Page 15 - shut off. Clean the outdoor unit coil with water at

1. Attach pressure gage to suction service port. 2. Frontseat the liquid line valve on the outdoor coil section. 3. Start system and run until suction pressure reaches 5 psig (see Caution) or low-pressure switch opens. 4. Shut off system. Frontseat vapor line valve on outdoor coil section. 5. Vent r...

Page 17 - TROUBLESHOOTING GUIDE — COOLING

TROUBLESHOOTING GUIDE — COOLING SYMPTOM AND PROBABLE CAUSE PROBABLE REMEDY /■ r \ COMPRESSOR WILL NOT RUN OR SHUTS OFF — WILL NOT RESTART Contactor open 1. Burned out transformer, open thermostat circuit, open overload. 2. Power supply interrupted. 3. Power circuit is open due to loose electrical co...

Page 18 - TROUBLESHOOTING GUIDE — HEATING

TROUBLESHOOTING GUIDE — HEATING SYMPTOM AND PROBABLE CAUSE NO HEATING (Compressor Will Not Run) 1. Main power circuit open due to faulty power supply. 2. Control power circuit open or faulty. 3. Defrost control malfunctioning. 4. Signal-Loc™ malfunction. INSUFFICIENT HEATING (Compressor Runs or Cycl...

Carrier WEATHERMASTER III 38HQ- Manuals

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User Manual Carrier WEATHERMASTER III 38HQ

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