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TM 9-4120-389-14
Figure 5-4. Refrigerant Charging
After the system has been satisfactorily evacuated, it must be fully charged with refrigerant-22.
CAUTION
Never introduce liquid refrigerant into the low pressure (suction) service valve.
NOTE
The system must be evacuated before charging. Use only refrigerant-22 to charge the unit. If available, use
recycled refrigerant.
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 manifold.
b. Connect the center hose from the charging manifold to a well charged drum of refrigerant-22.
Change 2 5-14
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