Standard Regulations - Kenmore STEP UP Service Manual

10. Cooling Cycle Heavy Repair
10-3. Practical Work for Heavy Repair (continued)
Items
4.Refrigerant
charging
(continued)
5. Gas-leakage test
6. Pipe arrangement
in each cycle
9-4. Standard Regulations for Heavy Repair
1) Observe the safety precautions for gas handling.
2) Use JIG (or wet towel) in order to prevent electric wires from burning during welding.
(In order to prevent insulation break and accident.)
3) The inner case shall be melted and insulation material (polyurethane) shall be burnt if not cared
during welding inner case parts.
4) The copper pipe shall be oxidized by overheating if not cared during welding.
5) Not allow the aluminum pipes to contact to copper pipes. (In order to prevent corrosion.)
6) Make sure that the inner diameter should not be distorted while cutting a capillary tube.
7) Be sure that a suction pipe and a filling tube should not be substituted each other during welding.
( High efficiency pump.)
To avoid risk of electrical shock that can cause death or severe personal injury,
WARNING
!
disconnect unit from power before servicing unless tests require power.
4) Refrigerant Charging
Charge refrigerant while operating a compressor as shown above.
5) Pinch a charging pipe with a pinch-off pliers after completion of charging.
6) Lockring the end of a pinched charging pipe with
the welded parts.
Take a leakage test on the welded or suspicious area with an electronic leakage tester.
Check each pipe is placed in its original place before closing a cover back-M/C after
completion of work.
Precautions
lockring and take a gas leakage test on
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