TM 9-4120-378-14
5.23 PRESSURE RELIEF VALVE-INSPECT/REPLACE. This task covers inspect, removal and installation.
INITIAL SETUP
Equipment Conditions:
Rear top cover removed (paragraph 4.17)
Refrigerant system discharged (paragraph 5.4)
Remarks
Action
Location/Item
Top of
Housing
Avoid bodily contact with liquid refrig-
erant and avoid inhaling refrigerant
gas. Be especially careful that refrig-
erant does not come in contact with
eyes. In case of refrigerant leaks, ven-
tilate area immediately.
Check that power source is discon-
nected. Check that system is dis-
charged of refrigerant.
Check valve and attaching hardware for damage.
Inspect
Removal
a. Remove screw (l), Iockwasher (2), flat washer (3)
and clamp (4).
b. Unscrew valve (5) from adapter (6).
a. Install pressure relief valve (5) in adapter (6). Install
Installation
loop clamp (4) on valve (5) and secure clamp with
screw (1), Iockwasher (2), and flat washer (3).
See paragraph 5.25.
b.
Replace dehydrator.
See paragraph 5.7.
c.
Leak test refrigeration system.
See paragraph 5.8.
d.
Evacuate refrigeration system.
See paragraph 5.9.
e.
Charge refrigeration system.
