TM 9-4120-378-14
5.9 REFRIGERATION SYSTEM SERV ICING - (CHARGING). This task covers charging refrigeration system.
.
Material/Part:
Equipment Condition:
Refrigerant-22, (Appendix E, Item 10)
Refrigeration system evacuated (paragraph 5.8)
Test Equipment:
Charging cylinder or scale
Remarks
Action
Location/Item
Disconnect air conditioner power sup-
ply before doing any maintenance
work on the electrical system.
Never introduce liquid refrigerant into
the low pressure (suction) service
valve.
NOTE
Install top covers before charging unit.
The system must be evacuated before
charging. Use only refrigerant-22 to
charge the unit.
Whenever available, use recycled re-
frigerant for charging the refrigeration
system.
Connect the hose from the low pressure service
valve to the compound gage side of the charging
manifold. The hose from the high pressure service
valve should be connected to the high pressure
gage side of the manifold.
Connect the center hose from the charging man-
ifold to a well-charged cylinder of refrigerant-22, or
a charging cylinder.
Loosen the hose connections to the two service
valves slightly.
