Pressure Relief Valve - TM-5-4120-222-140059

c. Installation. Install a new dehydrator by re-

c. Installation. Replace a defective pressure

versing removal order as illustrated on figure 5-

relief valve by reversing order of removal as illus-

19. Evacuate and recharge the unit refrigerating

trated on figure 5-19. Pressure test, evacuate and

recharge refrigerating system (para 5-33).

5-26. Pressure Relief Valve

5-27. Sight Glass

a. General. Pressure relief valve (fig. 519) is

a. General. The sight glass indicates the refrig-

located on a tee just below the dehydrator. The

erant moisture content. A shortage of refrig-

p r e s s u r e relief valve protects the refrigerant

erant is indicated by bubbles in sight glass.

system from excessive pressure.

b. Inspection. Inspect sight glass for cracks,

b. Removal. Discharge the refrigerant system,

breaks, or other damage.

refer to figure 5-19, and remove the pressure

relief valve.

c. Removal. Remove top panel, air conditioner.

AGO 220053A