TM 9-4120-404-14
4-22. PRESSURE RELIEF VALVE.
This Task Covers:
a. Removal
b. Installation
Initial Setup:
Tools Required
Tool Kit, Service, Refrigeration, Unit (Item 1, Appendix B)
Pump, Vacuum (Item 1, Appendix B)
Regulator Assembly (Item 6, Appendix B)
Material/Parts Required
Oil (Item 22, Appendix E)
Equipment Condition
Air conditioner shut down and cool.
Condenser fan motor nearest pressure relief valve removed (see para. 3-34).
Condenser fan scroll nearest pressure relief valve removed (see para. 4-14).
Recover refrigerant from system (see para. 4-6).
Rear cover removed (s ee para. 3-27).
Hold tee (1) so that it cannot be twisted and remove pressure relief valve (2).
b. Installation.
(1) Apply oil to the threads of the pressure relief valve (2) and install pressure relief valve into tee (1).
(2) Replace dehydrator (see para. 4-18).
(3) Replace rear cover (see para. 3-27).
(4) Replace condenser fan scroll (see para. 4-14).
(5) Replace condenser fan motor (see para. 3-34),
(6) Service refrigeration system per para. 4-6.
4-50
