Service Manual
25VNA
Infinityt Variable Speed Heat Pump
with Greenspeedt Intellig ence
2to5NominalTons
TABLE OF CONTENTS
PAGE
UNIT IDENTIFICATION 2..................................................................................
SAFETY CONSIDERATIONS 3..............................................................................
GENERAL INFORMATION 3................................................................................
ELECTRICAL 4--6.........................................................................................
ELECTRONIC EXPANSION VALVE (EXV) 5--6.................................................................
Controller 5............................................................................................
Crankcase Heater 5......................................................................................
Outdoor Fan Motor 5.....................................................................................
Time--Delays 5.........................................................................................
Infinity Controlled Low Ambient Cooling 6...................................................................
Utility Interface with Infinity Control 6.......................................................................
COMMUNICATION AND STATUS FUNCTION LIGHTS 6--7......................................................
REFRIGERANT PIPING LENGTH LIMITATIONS 8.............................................................
LONG LINE APPLICATIONS 8--9............................................................................
TROUBLESHOOTING 10--30................................................................................
REFRIGERATION SYSTEM 33--37...........................................................................
Refrigerant 33..........................................................................................
Compressor Oil 33.......................................................................................
Servicing Systems on Roofs With Synthetic Materials 33.........................................................
Brazing 33.............................................................................................
Service Valves and Pump down 34--35.......................................................................
Liquid Line Filter Drier 36................................................................................
Suction Line Filter Drier 36................................................................................
Thermostatic Expansion Valve (TXV) 36.....................................................................
Accumulator 37.........................................................................................
REFRIGERATION SYSTEM REPAIR 38.......................................................................
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