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 TM 5-4120-393-14
5-25. Service Valves
This task covers:
a. Inspection
c. Installation
b. Removal
Initial setup.
Tools:
Tool kit, service, refrigeration unit NSN 5180-00-596-1474
Personnel: 1
Materials:
Rags (Appendix E, item 9)
Equipment condition:
1. Turn unit power off at power source. If there is a chance that it will be turned on, also disconnect power cable
to air conditioner.
2. Remove lower front panel. See para 4-24.
General Safety Instructions:
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.
INSPECTION
1.
Check that caps are in place and that threaded connection ends are not damag ed. Replace if missing or damaged.
2.
Check for signs of leakage. Leak test if leak is suspected. See para 5-12.
REMOVAL
1.
Discharge the refrigerant system. See para 5-9.
NOTE
If valve is to be reused, internal parts should be removed prior to debrazing.
2.
While purging the system with nitrogen, debraze valves (3) and (4) from the tubing. See para 5-10 and 5-11.
3.
Remove valve.
5-59
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