Equalizer Solenoid Valve.

TM 5-4120-355-14

6-9. Equalizer Solenoid Valve.

a. Removal. Slowly discharge refrigerant from the system (para 5-9). Refer to figure 4-10 and remove the equalizer

b. Installation. Refer to figure 4-10 and install the equalizer solenoid valve. Evacuate and recharge the refrigeration

6-10. Pressure Relief Valve.

a. Removal. Slowly discharge refrigerant from the system (para 5-9). Refer to figure 4-7 and remove pressure

relief valve.

b. Installation. Refer to figure 4-7 and install pressure relief valve. Evacuate and recharge the refrigaration system

6-11. Expansion Valves.

a. Removal.

(1) Remove the cover panel (Para 4-15).

(2) Discharge refrigerant from the system (para 5-9).

(31 Refer to figure 4-10, remove two bolts and one flare nut on each side of the valve and remove the valve.

b. Adjustment.

(1) Remove side cap from expansion valve base.

NOTE: Make sure thermal bulb is securely fastened to suction line and the bulb is covered with rubber insulation.

(2) Turn stem clockwise for higher superheat and counterclockwise for lower superheat. A suction gas superheat

of 5 to 10 degrees" F out of the evaporator coil is satisfactory. A superheat of 10 to 20 degrees F when measuring the

superheat at the thermal bulb is also satisfactory. If the superheat does not reach the required value when adjusted, check

for dirt or other restrictions in the liquid line or expansion valve.

c. installation

(1) Secure the expansion valve with two bolts and secure the flare nut on each side.

(2) Charge the unit (Para 5-9).

(3) Replace the cover panel (Para 4-15).

6-12. Sight Glass.

a. Removal. Slowly discharge the refrigerant charge from the system (para 5-9). Refer to figure 4-13 and remove

sight glass.

b. Installation. Refer to figure 4-13 and install sight glass. Refer to paragraph 5-9 and recharge system.

6-13. Access Fittings.

a. Removal

(1) Remove front panel (para 4-15).

6-4