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CONTROL DIAGRAM • NOTE: A = Refrigerant liquid; B = Refrigerant vapor; C = Air flow Item Part Number Description 1 - Evaporator 2 - Thermostatic expansion valve 3 - High pressure servicing connection 4 - Refrigerant pressure sensor 5 - Engine cooling fan 6 - Condenser 7 - Receiver/Drier 8 - A/C compressor 9 - Low pressure servicing connection 10 - Cooling fan PRINCIPLES OF OPERATION To accomplish the transfer of heat, the refrigerant is circulated around the system, where it passes through 2 The low pressure/temperature regime is from the thermostatic expansion valve, through the evaporator to the compressor. |