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ARMY TM 9-4120-381-14
NAVY EE-000-CA-MMA-010/7053-AC
AIR FORCE TO 35E9-136-31
5-17.
CHARGING REFRIGERANTSYSTEM.
This task covers: Service
INITIAL SETUP:
Tools:
Tool kit, service, refrigeration unit (Item 1, Appendix B)
Recovery and Recycling Unit, Refrigeration (Item 26, 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.
Remove right front evaporator panel (para 4-25).
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.
After system has been satisfactorily evacuated, it must be fully charged with R22 refrigerant.
CAUTION
Never introduce liquid refrigerant Into the low pressure (suction, service) valve. Compressor damage
may result.
NOTE
The system must be evacuated before charging. Use only R-22 refrigerant to charge unit. Whenever
available, use recycled refrigerant for charging the refrigeration system.
2.
Check that service manifold is connected (para 5-11).
3.
Check that 1/4 (0.64 cm) inch yellow hose is connected to R-22 refrigerant cylinder.
5-31
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