Carrier 50ZHA024-060 User Manual

50ZHA024-060Packaged Heat Pump UnitsInstallation, Start-Up and Service InstructionsNOTE: Read the entire instruction manual before starting theinstall

Fig. 11A—Typical Unit Electrical Diagram (Sizes 024-042)A0519910

A05200Fig. 11B—Typical Unit Electrical Diagram (Sizes 048-060)11

Fig. 11C—Accessory Electric Heater WiringA05209Table 6—Electrical Data—50ZHAUNIT SIZE50ZHAV-PH-HZVOLTAGERANGECOMPRESSOROFMFLAIFMFLAELECTRIC HEAT SINGL

SIZERATED AIRFLOW HIGH AIRFLOWLowStageHighStageLowStageHighStage048 Tap 1 Tap 3 Tap 2 Tap 4060 Tap 1 Tap 3 Tap 2 Tap 4Step 5—Unit ControlsAll compress

COOLING OPERATION (SIZES 024-042)With a call for cooling (Y/Y2), the indoor fan energizes immedi-ately whereas the contactor energizes aftera5minute t

be performed on this equipment. This cooling unit should beinspected at least once each year by a qualified service person. Totroubleshoot cooling of

a. Slip the wheel back in the housing with the hub set screwparented in the correct direction.b. Install the filler panel.c. Reinsert the motor assemb

After inspecting the electrical controls and wiring, replace all thepanels. Start the unit, and observe at least one complete coolingcycle to ensure p

Fig. 14—Typical Heat Pump Operation, Heating ModeC95045STRAINERACCUMULATORCOMPRESSORSTRAINERLCSOUTDOOR COILINDOOR COILABDCCheck ValvesAOpenBClosedCOpe

Table 12—Troubleshooting—Cooling and HeatingSYMPTOM CAUSE REMEDYCompressor and outdoor fan will not start.Power Failure Call power companyLoss of Char

Follow all safety codes. Wear safety glasses and work gloves. Usequenching cloth for unbrazing operations. Have fire extinguisheravailable for all bra

START-UP CHECKLIST(REMOVE AND STORE IN JOB FILE)I. PRELIMINARY INFORMATIONModel No ...

Fig. 2—Unit Base Dimensions, 50ZHA024-060A052013

are field-installed and must be removed from the indoor blowercompartment prior to start-up, even if they are not used forinstallation.When designing

Step 7—Install Electrical ConnectionsELECTRICAL SHOCK HAZARDFailure to follow this warning could result in personal injuryor death.The unit cabinet mu

Table 3—Minimum Airflow for Safe Electric HeaterOperation (CFM)SIZE 024 030 036 042 048 060Cfm 600 750 900 1050 1200 1500UNIT DAMAGE HAZARDFailure to

b. Inspect for oil at all refrigerant tubing connections and onunit base. Detecting oil generally indicates a refrigerantleak. Leak-test all refrigera

START-UPUse the Start-Up Checklist supplied at the end of this book andproceed as follows:Step 1—Check for Refrigerant LeaksLOCATE AND REPAIR REFRIGER

LOW CHARGE COOLING024-042 units:1. Measure suction line pressure by attaching a gauge to theservice port.2. Measure the suction line temperature by at