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 TM 5-4120-393-14
5-23. Pressure Relief Valve
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: Antisieze tape (Appendix E, item 3)
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.
3. Remove junction box number one. See para 4-40.
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 for evidence of leakage. If leak suspected perform leak test. See para 5-12.
2.
Check for damage. Replace if damaged.
REMOVAL
1.
Discharge the refrigerant system. See para 5-9.
2.
Using two wrenches, hold fitting so that it is not twisted and unscrew pressure relief valve (1).
5-55
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