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TM5-4120-376-14
5-23. EVAPORATOR, CONDENSER COILS AND RELATED PARTS/Replace (Cont)
LOCATION/ITEM
Removal:
WARNING
Purge system with dry nitrogen prior to soldering. Refrigerant heated to
1200°F (649OC) creates phosegene gas.
WARNING
Avoid contact with refrigerant acid. Burns could
refrigerant.
result from contact with
WARNING
Refrigerant R-22 is contained in the refrigerant system under high pressure.
Extreme care must be exercised 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.
WARNING
Polyurethane foam insulation breaks down to form toxic gases when heated to
brazing temperatures.
CAUTION
Maintain a 1-2 cpm (0.1-0.2M³ Min) flow of dry nitrogen through the
refrigeration system to prevent oxidation and scaling when brazing or debrazing
components.
NOTE
Leak check fittings. Always perform inspections, adjustments and test before
removing refrigerant components.
5. Discharge system in accordance with paragraph 5-8, page 5-10.
6. Remove six screws (7) and six lock washers (8) securing evaporator coil (9) to mounting
brackets.
5-79
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