Heating and Air Conditioning: Description and Operation

A/C Refrigerant System, Identification

Typical A/C Refrigerant System With Expansion Valve And Receiver Drier







1 - Evaporator
2 - Expansion valve
3 - High pressure service valve
4 - Sight glass (if equipped)
5 - Receiver drier
6 - Condenser
7 - Compressor


NOTE: Arrows indicate direction of refrigerant flow.