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ARMY TM 9-4120-381-14
NAVY EE-000-CA-MMA-010/7053-AC
AIR FORCE TO 35E9-136-31
1.
Check that new drier filter was installed. If not, install one (para 5-26).
2.
Check that both charging manifold valves are closed.
3.
Remove yellow 3/8 inch (0.95 cm) hose from hose rack and connect to vacuum pump.
4.
Remove 1/4 inch (0.64 cm) yellow hose from hose rack and connect to R-22 refrigerant cylinder positioned for
dispensing gas.
5.
Open R-22 refrigerant cylinder and loosen 1/4 inch (0.64 cm) yellow hose at charge port and purge for 3-5
seconds, then tighten.
6.
Open VPV, CGV, and PGV.
7.
Start vacuum pump and open ballast valve (on vacuum pump) one turn.
8.
Observe gauge reading on vacuum pump for reading of 29-30 Hg vacuum.
9.
Close VPV and open CV and add refrigerant until compound and pressure gauges read approximately 2 psig
(4.41 kg), then close CV.
10.
Stop vacuum pump and close ballast valve.
11.
Allow refrigerant to remain in system for one hour.
NOTE
Refrigerant will act as a blotter for moisture. One hour is recommended time for maximum moisture
removal. Shorter blotting period could be used if it is known that system is relatively dry.
12.
Open VPV.
13.
Repeat steps 7 thru 11.
14.
Open VPV.
15.
Repeat steps7 thru 11.
16.
Close VPV and OGV.
17.
Stop vacuum pump and close ballast valve.
18.
Disconnect hose from vacuum pump and return it to rack.
19.
Charge refrigeration system (para 5-17).
5-30
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