Carrier 50ZH024-060 User Manual

Installation, Start-Up andService InstructionsCONTENTSPageSAFETY CONSIDERATIONS ...1GENERAL ...1-5RECEI

Table 3 — Electrical DataUNIT50ZHNOMINALV-PH-HzIFMTYPEVOLTAGERANGECOMPRESSOROFMFLAIFMFLAHEATERPACKAGE NO.ELECTRICHEATPOWERSUPPLYDISCONNECTSIZEMin Max

PRE-START-UPFailure to observe the following warnings could resultin serious personal injury:1. Follow recognized safety practices and wear protec-tiv

START-UPUse the Start-Up Checklist supplied at the end of this book,and proceed as follows:Check for Refrigerant Leaks — Locate and repairrefrigerant

Fig. 16 — Cooling Charging Chart — 50ZH030Fig. 17 — Cooling Charging Chart — 50ZH036Fig. 15 — Cooling Charging Chart — 50ZH024Fig. 18 — Cooling Chargi

INDOOR AIRFLOW AND AIRFLOW ADJUSTMENTSFor cooling operation, the recommended airflow is350 to 450 cfm per each 12,000 Btuh of rated coolingcapacity.Tab

UNIT CONTROLS — All compressors have the followinginternal-protection controls.High-Pressure Relief Valve — This valve opens when thepressure differen

Inspect air filter(s) at least once each month and replace(throwaway-type) or clean (cleanable-type) at least twice dur-ing each cooling season or when

Refrigerant Circuit — Inspect all refrigerant tubing con-nections and the unit base for oil accumulations annually.Detecting oil generally indicates a

TROUBLESHOOTINGCooling and Heating Troubleshooting ChartSYMPTOM CAUSE REMEDYCompressor and out-door fan will not start.Power failure Call power compan

Cooling and Heating Troubleshooting Chart (cont)SYMPTOM CAUSE REMEDYExcessive headpressure.Dirty air filter Replace filter.Dirty indoor or outdoor coil

UNITELECTRICALCHARACTERISTICSV-Ph-HzUNIT WEIGHT CENTER OF GRAVITY mm (in.)Lb Kg X Y Z50ZH024 208/230-1-60 232 106 356 (14.0) 483 (19.0) 305 (12.0)50ZH

PACKAGED SERVICE TRAININGOur packaged service training programs provide an excellent way to increase your knowledge of theequipment discussed in this

START-UP CHECKLIST(Remove and Store in Job File)I. PRELIMINARY INFORMATIONMODEL NO.:DATE:SERIAL NO.:TECHNICIAN:II. PRE-START-UP (insert checkmark in b

UNITELECTRICALCHARACTERISTICSV-Ph-HzUNIT WEIGHT CENTER OF GRAVITY mm (in.)Lb Kg X Y Z50ZH036 208/230-1-60, 208/230-3-60 277 126 356 (14.0) 483 (19.0)

UNITELECTRICALCHARACTERISTICSV-Ph-HzUNIT WEIGHT CENTER OF GRAVITY mm (in.)Lb Kg X Y Z50ZH060208/230-1-60, 208/230-3-60,460-3-60368 167 356 (14.00) 508

RECEIVING AND INSTALLATIONStep 1 — Check EquipmentIDENTIFY UNIT — The unit model number and serial num-ber are stamped on the unit identification plate

Select and size ductwork, supply-air registers andreturn-air grilles according to ASHRAE (American Societyof Heating, Refrigeration, and Air Condition

CONVERTING HORIZONTAL DISCHARGE UNITS TODOWNFLOW (VERTICAL) DISCHARGEBefore performing service or maintenance operations onthe system, turn off the ma

HIGH-VOLTAGE CONNECTIONS — The unit must havea separate electrical service with a field-supplied, water-proof disconnect switch mounted at, or within s

HIGH-VOLTAGEPOWER WIRINGENTRY HOLELOW-VOLTAGEWIRING ENTRYHOLEFig. 10 — Unit Electrical Connection Entry HolesELECTRICHEATERFUSESCIRCUITBREAKER(24v)IND