Carrier 50ZHA024-060- Manuals

Step 7—Install Electrical Connections ELECTRICAL SHOCK HAZARDFailure to follow this warning could result in personal injuryor death.The unit cabinet must have an uninterrupted, unbrokenelectrical ground to minimize the possibility of personalinjury if an electrical fault should occur. This ground ma...

Table 3—Minimum Airflow for Safe Electric Heater Operation (CFM) SIZE 024 030 036 042 048 060 Cfm 600 750 900 1050 1200 1500 UNIT DAMAGE HAZARDFailure to follow this caution may result in unit componentdamage. Operation of unit on improper line voltage consti-tutes abuse and may cause unit damage th...

b. Inspect for oil at all refrigerant tubing connections and on unit base. Detecting oil generally indicates a refrigerantleak. Leak-test all refrigerant tubing connections usingelectronic leak detector, or liquid-soap solution. If a refrig-erant leak is detected, see following Check for Refrigerant...

START-UP Use the Start-Up Checklist supplied at the end of this book andproceed as follows: Step 1—Check for Refrigerant Leaks LOCATE AND REPAIR REFRIGERANT LEAKS AND CHARGE THE UNIT AS FOLLOWS: 1. Using both high- and low-pressure ports, locate leaks and reclaim remaining refrigerant to relieve sys...

LOW CHARGE COOLING 024-042 units: 1. Measure suction line pressure by attaching a gauge to the service port. 2. Measure the suction line temperature by attaching a tempera- ture sensing device to it. 3. Insulate the temperature sensing device so that the outdoor ambient doesn’t affect the reading. 4...

SIZE RATED AIRFLOW HIGH AIRFLOW Low Stage High Stage Low Stage High Stage 048 Tap 1 Tap 3 Tap 2 Tap 4 060 Tap 1 Tap 3 Tap 2 Tap 4 Step 5—Unit Controls All compressors have the following internal-protection controls. HIGH-PRESSURE RELIEF VALVE This valve opens when the pressure differential between t...

COOLING OPERATION (SIZES 024-042) With a call for cooling (Y/Y2), the indoor fan energizes immedi-ately whereas the contactor energizes after a 5 minute time delay(in case of initial start-up) starting the compressor and the outdoorfan motor. When the cooling demand is met, Y/Y2 de-energizes,shuttin...

a. Slip the wheel back in the housing with the hub set screw parented in the correct direction. b. Install the filler panel. c. Reinsert the motor assembly in the wheel hub and align the mounting legs with the housing mounting hold locations. d. Tighten the mounting bolts to fasten the motor assembl...

After inspecting the electrical controls and wiring, replace all thepanels. Start the unit, and observe at least one complete coolingcycle to ensure proper operation. If discrepancies are observed inoperating cycle, or if a suspected malfunction has occurred, checkeach electrical component with the ...

Fig. 14—Typical Heat Pump Operation, Heating Mode C95045 STRAINER ACCUMULA T OR COMPRESSOR STRAINER LCS OUTDOOR COIL INDOOR COIL A B D C Check Valves A Open B Closed C Open D Closed LEGEND LCS Loss of Charge Switch Acutrol Metering Device Check Valve (Arrow indicates direction of flow) HEATING CYCLE...

Table 12—Troubleshooting—Cooling and Heating SYMPTOM CAUSE REMEDY Compressor and outdoor fan will not start. Power Failure Call power company Loss of Charge Switch open Evaluate unit for possible refrigerant leak Fuse blown or circuit breaker tripped Replace fuse or reset circuit breaker Defective t...

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

Step 7—Install Electrical Connections ELECTRICAL SHOCK HAZARDFailure to follow this warning could result in personal injuryor death.The unit cabinet must have an uninterrupted, unbrokenelectrical ground to minimize the possibility of personalinjury if an electrical fault should occur. This ground ma...

Table 3—Minimum Airflow for Safe Electric Heater Operation (CFM) SIZE 024 030 036 042 048 060 Cfm 600 750 900 1050 1200 1500 UNIT DAMAGE HAZARDFailure to follow this caution may result in unit componentdamage. Operation of unit on improper line voltage consti-tutes abuse and may cause unit damage th...

b. Inspect for oil at all refrigerant tubing connections and on unit base. Detecting oil generally indicates a refrigerantleak. Leak-test all refrigerant tubing connections usingelectronic leak detector, or liquid-soap solution. If a refrig-erant leak is detected, see following Check for Refrigerant...

START-UP Use the Start-Up Checklist supplied at the end of this book andproceed as follows: Step 1—Check for Refrigerant Leaks LOCATE AND REPAIR REFRIGERANT LEAKS AND CHARGE THE UNIT AS FOLLOWS: 1. Using both high- and low-pressure ports, locate leaks and reclaim remaining refrigerant to relieve sys...

LOW CHARGE COOLING 024-042 units: 1. Measure suction line pressure by attaching a gauge to the service port. 2. Measure the suction line temperature by attaching a tempera- ture sensing device to it. 3. Insulate the temperature sensing device so that the outdoor ambient doesn’t affect the reading. 4...

SIZE RATED AIRFLOW HIGH AIRFLOW Low Stage High Stage Low Stage High Stage 048 Tap 1 Tap 3 Tap 2 Tap 4 060 Tap 1 Tap 3 Tap 2 Tap 4 Step 5—Unit Controls All compressors have the following internal-protection controls. HIGH-PRESSURE RELIEF VALVE This valve opens when the pressure differential between t...

COOLING OPERATION (SIZES 024-042) With a call for cooling (Y/Y2), the indoor fan energizes immedi-ately whereas the contactor energizes after a 5 minute time delay(in case of initial start-up) starting the compressor and the outdoorfan motor. When the cooling demand is met, Y/Y2 de-energizes,shuttin...

a. Slip the wheel back in the housing with the hub set screw parented in the correct direction. b. Install the filler panel. c. Reinsert the motor assembly in the wheel hub and align the mounting legs with the housing mounting hold locations. d. Tighten the mounting bolts to fasten the motor assembl...

After inspecting the electrical controls and wiring, replace all thepanels. Start the unit, and observe at least one complete coolingcycle to ensure proper operation. If discrepancies are observed inoperating cycle, or if a suspected malfunction has occurred, checkeach electrical component with the ...

Fig. 14—Typical Heat Pump Operation, Heating Mode C95045 STRAINER ACCUMULA T OR COMPRESSOR STRAINER LCS OUTDOOR COIL INDOOR COIL A B D C Check Valves A Open B Closed C Open D Closed LEGEND LCS Loss of Charge Switch Acutrol Metering Device Check Valve (Arrow indicates direction of flow) HEATING CYCLE...

Table 12—Troubleshooting—Cooling and Heating SYMPTOM CAUSE REMEDY Compressor and outdoor fan will not start. Power Failure Call power company Loss of Charge Switch open Evaluate unit for possible refrigerant leak Fuse blown or circuit breaker tripped Replace fuse or reset circuit breaker Defective t...

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