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TM5-4120-376-14
5-19. REFRIGERANT VALVES AND RELATED TUBING/Test, Repair, Replace (Cont)
LOCATION/ITEM
EXPANSION VALVE/QUENCH VALVE/SOLENOID VALVE/PRESSURE REGULATING VALVE
Installation:
WARNING
1.
with
2.
3.
Avoid contact with refrigerant acid. Burns could result from contact with
refrigerant.
Refrigerant R-22 is contained in
Extreme care must be exercised
WARNING
the refrigerant system under high pressure.
to prevent refrigerant from coming in contact
with exposed skin and eyes. Provide adequate ventilation when discharging the
system in a confined area. All refrigerant gas must be discharged from system
before performing any removal procedures of refrigerant components.
CAUTION
Maintain a 1-2 cpm (0.1-0.2 M 3/Min) flow of dry nitrogen through the
refrigeration system to prevent oxidation and scaling when brazing or debrazing
components.
NOTE
Wrap valve with wet cloth to prevent overheating valve during soldering.
Align sensor bulb (18) and one clamp (17) with sensor bulb mounting bracket and secure
one screw (15) and one lock washer (16).
Braze in accordance with paragraph 5-10, page 5-12.
Install one clamp (12) around pressure regulating valve (14) and align with spacer post (13)
on hole in bulkhead and secure one screw (11).
4. Secure sensor bulb (18) to suction line (19) with cable strap (10).
5. Test, evacuate and charge system in accordance with paragraphs 5-8 through 5-14, pages
5-10 through 5-19.
SOLENOID VALVE (L-1) (L-2)
6.
7.
5-40
Braze in accordance with paragraph 5-10, page 5-12.
Secure solenoid valve base (20) to bulkhead with two screws (19).
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