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ARMY TM 9-4120-381-14
NAVY EE-000-CA-MMA-010/7053-AC
AIR FORCE TO 35E9-136-31
5-11.
SERVICE MANIFOLD INSTALLATION
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.
Remove protective caps (Figure 5-3) from high and low pressure service valve stems.
2.
Insure service valves for manifold are closed, then remove caps from service ports.
3.
Remove blue and red hoses from service manifold hose rack.
4.
Connect blue hose to low pressure service valve and red hose to high pressure service valve.
5.
Open high and low pressure service valves.
6.
Loosen blue hose at compound gauge port and allow refrigerant to purge for 3-5 seconds, then tighten.
7.
Loosen red hose at pressure gauge port and allow refrigerant to purge for 3-5 seconds, then tighten.
8.
The service manifold is now installed, purged and ready for test or maintenance operations.
FOLLOW ON PROCEDURE
1.
When all testing is complete, install right front condenser panel (para 4-28).
2.
Connect air conditioner input power at source.
5-18
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