Carrier 50ZHA024-060 User Manuals

Table of Contents

• SAFETY CONSIDERATIONS

  1
• INTRODUCTION

  2
• RECEIVING AND INSTALLATION

  2
• Check Equipment

  2
• IDENTIFY UNIT

  2
• INSPECT SHIPMENT

  2
• Provide Unit Support

  2
• SLAB MOUNT

  2
• GROUND MOUNT

  2
• Provide Clearances

  2
• Place Unit

  2
• Select and Install Ductwork

  2
• CHARGE

  4
• Provide for Condensate Disposal

  4
• Install Electrical Connections

  5
• HIGH-VOLTAGE CONNECTIONS

  5
• ROUTING POWER LEADS INTO UNIT

  6
• ROUTING CONTROL POWER WIRES

  6
• Indoor Blower and Motor

  15
• ACCESSORY ELECTRIC HEAT WIRING

  6
• Outdoor Coil, Indoor Coil, and Condensate Drain Pan

  16
• PRE-START-UP

  6
• Outdoor Fan

  16
• START-UP

  7
• Electrical Controls and Wiring

  16
• Check for Refrigerant Leaks

  8
• Refrigerant Circuit

  17
• Indoor Airflow

  17
• CHARGE THE UNIT AS FOLLOWS:

  8
• Metering Devices

  17
• Start-Up Cooling Section and Make Adjustments

  8
• Lubrication

  17
• CHECKING COOLING CONTROL OPERATION

  8
• Liquid Line Strainer

  17
• Refrigerant Charge

  8
• High Flow Valves

  17
• NO CHARGE

  8
• TROUBLESHOOTING

  17
• LOW CHARGE COOLING

  9
• START-UP CHECKLIST

  17
• HEATING MODE CHARGE

  9
• Indoor Airflow and Airflow Adjustments

  9
• FOR 208/230-V

  13
• Unit Controls

  13
• HIGH-PRESSURE RELIEF VALVE

  13
• LOSS OF CHARGE SWITCH

  13
• COMPRESSOR OVERLOAD

  13
• Sequence of Operation

  13
• FAN OPERATION

  13
• COOLING

  14
• HEATING

  14
• CONTINUOUS FAN

  14
• DEFROST

  14
• ELECTRIC RESISTANCE HEATING

  14
• MAINTENANCE

  15
• Air Filter

  15
• Unit Top Removal (Outdoor-Coil Side)

  15