2. Precautions During Heavy Repair
COOLING CYCLE HEAVY REPAIR
1) Remove retained refrigerant more than 5 minutes after turning off
a refrigerator. (If not, oil will leak inside.)
2) Remove retained refrigerant by cutting first high pressure side
(drier part) with a nipper and then cut low pressure side.
(If the order is not observed, oil leak will happen.)
Removal of retained
refrigerant.
- Use special parts and tools for R-134a or R-600a.
Use of tools.
Precautions
Items
Process
Compresso
Evaporato
Drye
High Pressure
Low
pressure
Suction
Discharge tube
Condense
Hot
1) Nitrogen only should be used when cleaning inside of cycle pipes
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.
Others.
- Weld under nitrogen atmosphere in order to prevent oxidation
inside a pipe. (Nitrogen pressure : 0.1~0.2 kg/cm2.)
Nitrogen blowing
welding.
- Be sure to replace drier when repairing pipes
and injecting refrigerant.
Replacement of drier.
47
Summary of Contents for FRS-U20IV
Page 3: ...2 External Size SPECIFICATIONS 2...
Page 29: ...1 Inner Basic Model 2 Basic Model WIRING DIAGRAM Refrigerant R 134a Type 3 Dispenser Model 28...
Page 30: ...1 Inner Basic Model 2 Basic Model WIRING DIAGRAM Refrigerant R 600a Type 3 Dispenser Model 29...
Page 52: ...COOLING CYCLE HEAVY REPAIR Brzing Reference Drawings 51...
Page 54: ...How to install water line Dispenser models only 53...
Page 55: ...How to install water line Dispenser models only 54...
