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ARMY TM 9-4120-381-14
NAVY EE-000-CA-MMA-010/7053-AC
AIR FORCE TO 35E9-136-31
5-20.
PURGING COMPRESSOR.
This task covers:
Service
INITIAL SETUP:
Tools:
Tool kit, service, refrigeration unit (Item 1, Appendix B)
Gloves, chemical (Appendix C)
Goggles, industrial (Appendix C)
Personnel: 1
Equipment Conditions:
WARNING
Disconnect input power to the air conditioner before performing any internal maintenance. Voltages
used can KILL. Shutting the unit off at the control panel does not disconnect unit power.
1.
Disconnect air conditioner input power at source.
2.
Remove right front condenser panel (para 4-28).
SERVICE
WARNING
Death or serious injury may result if personnel fail to observe safety precautions. Use great care to
avoid contact with liquid refrigerant or refrigerant gas being discharged under pressure. Sudden and
irreversible tissue damage can result from freezing. Wear thermal protective gloves and a face
protector or goggles in any situation where skin-eye-contact is possible.
Prevent contact of refrigerant gas with flame or hot surfaces. Heat causes the refrigerant to break
down and form carbonyl chloride (phosgene), a highly poisonous and corrosive gas.
1.
Check that discharge and suction valves are frontseated (clockwise).
2.
Remove discharge and suction gauge port caps.
3.
Connect service manifold low pressure hose (blue) to compressor suction valve gauge port.
4.
Connect service manifold high pressure hose (red) to compressor discharge valve gauge port.
5.
Connect yellow 1/4 inch (0.64 cm) hose to R-22 refrigerant cylinder.
6.
Open CV, CGV, and VPV. Let refrigerant flow out into container port for 30 seconds.
7.
Turn CV slowly to reduce pressure of escaping refrigerant.
8.
Close CGV while refrigerant is escaping.
9.
Backseat (counterclockwise) suction and discharge service valves.
10. Close R-22 refrigerant valve.
11. Remove all service manifold hoses and return to manifold rack.
12. Install discharge and suction valve protective caps.
5-39
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