Daewoo frs20 manual Cooling Cycle Heavy Repair, Contents Tools

10. COOLING CYCLE HEAVY REPAIR

10-1. Summary of Heavy Repair

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

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