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ARMY TM 9-4120-381-14
NAVY EE-000-CA-MMA-010/7053-AC
AIR FORCE TO 35E9-136-31
5-16.
EVACUATING REFRIGERANT SYSTEM.
This task covers: Service
INITIAL SETUP:
Tools:
Tool, kit, service, refrigeration unit (Item 1, Appendix B)
Pump, vacuum (part of Item 1, Appendix B)
Gloves, chemical (Appendix C) Goggles, industrial (Appendix C)
Personnel: 1
Materials:
R-22 Refrigerant cylinder (Item 11, Appendix E)
Rags (Item 12, Appendix E)
Equipment Conditions :
WARNING
Disconnect input power to the air conditioner before performing any internal maintenance. Voltage
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.
Install service manifold (para 5-11).
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.
CAUTION
Do not evacuate a leaking system. The vacuum created can cause air, moisture, and dirt to enter
system.
NOTE
•
The refrigeration system must be evacuated to remove all moisture before it is charged with R-22
refrigerant.
•
Check that system was leak tested and has no leaks (para 5-15).
•
If compressor was replaced as result of a burn out, check that compressor burn out procedures were
followed (para 5-46).
5-28
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