TM 9-4120-371-14
(1) Discharge the refrigeration system in accordance with paragraph 5-6.
(2) Purge the system with nitrogen and debraze the tube connections. (See para 5-7 and 5-8.)
(3) Remove the pressure regulating valve.
c. Installation
(1) Place the pressure regulating valve on the tube ends, purge the system with nitrogen and braze
the tube joints. (See para 5-7 and 5-8.)
(3) Leak test all newly connected joints and those in the repaired area. (See para 5-9.)
(5) Evacuate and charge the refrigerant system. (See para 5-10 and 5-11.)