Daewoo frs20 Precautions During Heavy Repair, Use special parts and tools for R-134a or R-600a

10-2. Precautions During Heavy Repair

Items			Precautions
Use of tools.	1)	Use special parts and tools for R-134a or R-600a
	1)	Remove retained refrigerant more than 5 minutes after turning off
Removal of retained	a refrigerator. (If not, oil will leak inside.)
	2)	Remove retained refrigerant by cutting first high pressure side
refrigerant.
	(drier part) with a nipper and then cut low pressure side.
	(If the order is not observed, oil leak will happen.)
			Low pressure	Evaporator
		Suction tube	side
		Compressor		Hot Pipe
				Dryer
	Process tube
		Discharge tube	Condenser	High Pressure side
Replacement of drier.	1)	Be sure to replace drier when repairing pipes
	and injecting refrigerant.
Nitrogen blowing	1)	Weld under nitrogen atmosphere in order to prevent oxidation
welding.	inside a pipe. (Nitrogen pressure : 0.1~0.2 kg/cm2.)

	1)	Nitrogen only should be used when cleaning inside of cycle pipes
Others.	inside and sealing.
	2)	Check leakage with an electronic leakage tester.
	3)	Be sure to use a pipe cutter when cutting pipes.
	4)	Be careful not the water let intrude into the inside of the cycle.

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