Table Of Contents - Carrier 25HNA6 Installation Instruction

Table of Contents

Considerations1
Indoor Thermostat Control Options1
Installation Recommendations2
Installation2
Check Equipment And Job Site2
Clearance Requirements2
Operating Ambient3
Elevate Unit3
Make Piping Connections3
Refrigerant Connections / Recommended Liquid And Vapor Tube Diameters4
Accessory Usage4
Install Liquid-Line Filter Drier Indoor5
Refrigerant Tubing Connection Outdoor5
Sweat Connections5
Deep Vacuum Method5
Route Ground And Power Wires6
Connect Ground And Power Wires6
Connect Control Wiring6
Final Wiring Check6
Start-Up7
Cooling And Heating Operation7
Communication And Status Function Lights7
System Functions And Sequence Of Operation7
Unit Operation7
Utility Interface8
One Minute Stage Change Time Delay On 25Hna6 Models8
Compressor Operation8
Time Delays8
Heater Operation8
Fan Motor Operation8
General Information9
Low Ambient Cooling9
Defrost/Defrost Hold9
Stage Control Board9
Forced Defrost10
Quiet Shift10
Liquid-Line Solenoid Accessory10
Heating Check Chart Procedure10
Model Plug11
Pressure Switch Protection11
Brown-Out Protection11
Compressor Voltage Sensing11
Troubleshooting11
Unloader Test Procedure12
Temperature Thermistors12
Thermistor Sensor Comparison12
Failed Thermistor Default Operation13
Outdoor Air Thermistor (Oat) Attachment13
Outdoor Coil Thermistor (Oct) Attachment13
Status Codes14
Final Checks16
Care And Maintenance16