Thor Kitchen HC-767, Repair Manual, Page: 58 / 65

! WARNING: Only a qualified refrigeration technician could attempt a sealed
cooling system repair.
9. Cooling Cycle Heavy Repair
9.1 Summary of Heavy Repair
Process Contents Tools
Clean refrigeration
residuals
Cut off pipe ends(compressor, dryer), discharge
the refrigeration liquid from dryer and compressor.
Nipper, side cutters
Parts replacement and
welding
1. Confirm refrigerant R134a\600a, and oil for
compressor and dryer.
2. Confirm N2 sealing and packing conditions
before use. Use good one for welding and
assembly.
3. Repair in a clean and dry place.
Pipe cutter, Gas welder,
N2 gas
Vacuum
Evacuate for more than forty minutes after
connecting manifold gauge hose and vacuum
pump to high(dryer) and low(compressor) pressure
sides.
Vacuum pump, manifold
gauge quick coupling
Refrigerant charging and
charging inlet welding
1.weigh and control the bombe in a vacuum
conditions with electronic scales and charge
through compressor inlet (process tube)
2. Charge while refrigerator operates.
3. Weld carefully after inlet pinching.
Bombe(mass cylinder),
electronic scales,
refrigerant manifold
gauge, gas welding
machine
Check refrigerant leak
and cooling capacity
1. Check leak at weld joints. Note: do not use
soapy water for check.
2. Check cooling capacity:
Check condenser manually to see if warm.
Check hot pipe manually to see if warm.
Check frost formation of the whole surface of the
evaporator.
Electronic leak detector,
driver.
Compressor
compartment and tools
arrangement
1. Remove flux from the silver weld joints with soft
brusher wet rag.(Flux may be the cause of corrosion
and leak).
2. Clean tools and store them in a clean tool box or
in their place.
Copper brush, Rag,
Tool box
Transportation and
installation
Installation should be conducted in accordance
with the standard installation procedure. Leave
space of more than 5 cm from the wall for
compressor compartment cooling fan mounted
model
5 7