TM 9-4120-403-14
Figure 5-9. Charging the Refrigerant System.
SERVICE
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 hose from the charging manifold to a well charged drum of refrigerant-22.
c Loosen the hose connections to the two air conditioner charging valves slightly.
d Open the two charging manifold valves.
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