Removal - TM-5-4120-222-140056

thermostatic expansion valve adjusta in the same

operation. The one-half ton thermostatic expan-

manner.

sion valve functions when the unit is in the bypass

cycle of operation. Each expansion valve is pro-

d. Installation. Replace defective expansion

vided with a super heat setting adjustment (10F.

valves and install in reverse order of removal as

for each model) to assure efficiency in the refrig-

illustrated in figure 5-12. Evacuate and recharge

erant system.

the unit refrigerating system (para 5-33).

b. Removal. Discharge the refrigerant system,

refer to figure 5-12, and remove the themostatic

Note. A gas is superheated whenever its temperature is

expansion valves.

higher than the temperature, corresponding to its pressure

at saturation. Example: Refrigerant -22 at 69 pounds

c. Adjustment. Refer to figures 5-13 and 5-14,

pressure has a temperature of 40" F. If the suction pres-

and check and adjust the superheat setting of the

sure gage reads 69 pounds and the temperature of the

suction tube reads 50F., the gas is superheated 10F.

1-ton thermostatic expansion valve, The 1/2-ton

AGO 20053A