THE REFRIGERATION SYSTEM
This task covers:
Tool kit, refrigeration SVC
Voltages used can kill. Always
New filter-drier installed
disconnect power cord to air conditioner
before performing any internal
maintenance. Shutting unit off at its
control panel does not disconnect
After the system has been satisfactorily evacuated, it must be fully charged with refrigerant 22.
Never introduce liquid refrigerant into the low pressure (suction) service valve.
The system must be evacuated before charging. Use only refrigerant -22 to charge the unit.
Whenever available, use recycled refrigerant for charging the refrigeration system.
a. Check that the hose from the low pressure charging valve is connected to the compound gage side of the charging
manifold. The hose from the high pressure charging valve should be connected to the pressure gage side of the charging
b. Connect the center hose from the charging manifold to a well charged drum of refrigerant -22.