GE FRU-57QL Series Service Manual page 46

1. Summary of Heavy Repair
Process
Remove
Cut charging pipe ends (Comp. & Dryer) and
refrigerant
discharge refrigerant from drier and compressor.
Residuals
Confirm refrigerant (R-134a or R-600a) and oil for
compressor and drier.
Parts
Confirm N2 sealing and packing conditions before use.
replacement
Use good one for welding and assembly.
and welding
Weld under nitrogen gas atmosphere.
Repair in a clean and dry place.
Evacuate for more than forty minutes after connecting
Vacuum
manifold gauge hose and vacuum pump to high (drier)
and low (compressor) pressure sides.
Weigh and control the bombe in a vacuum conditions
Refrigerant
with electronic scales and charge through compressor
charging and
inlet (Process tube).
charging
Charge while refrigerator operates).
inlet welding
Weld carefully after inlet pinching.
Check leak at weld joints.
Note :Do not use soapy water for check.
Check
Check cooling capacity
refrigerant leak
- Check condenser manually to see if warm.
and cooling
- Check hot pipe manually to see if warm.
capacity
- Check frost formation on the whole surface of the
Remove flux from the silver weld joints with soft
Compressor
brusher wet rag. (Flux may be the cause of corrosion
compartment
and leaks.)
and tools
Clean tools and store them in a clean tool box
arrangement
or in their place.
Installation should be conducted in accordance with
Transportation
the standard installation procedure. (Leave space of
and
more than 5 cm from the wall for compressor
installation
compartment cooling fan mounted model.)
All manuals and user guides at all-guides.com
Contents
evaporator.
COOLING CYCLE HEAVY REPAIR
Nipper, side cutters
Pipe Cutter, Gas welder,
N2 gas
Vacuum pump
, Manifold gauge.
Bombe (mass cylinder),
refrigerant manifold gauge,
electronic scales, punching
off flier, gas welding machine
Electronic Leak Detector,
Driver.
Copper brush, Rag, Tool box
45
Tools