Gas Leak Repair Procedure - Panasonic OCU-CR200VF5 Service Manual

Gas Leak Repair Procedure

1. Gas leak position identification
1) When using a liquid leak detector
Identify the position where oil is leaking.
Find gas leaks by applying the liquid leak detector and checking for foaming.
2) When using a leak detector
Identify the position where oil is leaking.
Detect gas leaks by bringing the leak detector probe near the identified position.
Note: Use caution not to blow air during the detection process. (Detector reacts to
blown air.)
2. Releasing refrigerant
Release refrigerant in accordance with "Refrigerant Releasing Procedure".
3. Brazing repair operation
1) Prepare for brazing operation.
You will need the following tools during brazing operation:
- Brazing burner
- Phosphor copper solder
- Shield plate, heat insulation plate, wet waste cloth
- Blow and replacement nitrogen
2) Carry out brazing operation.
During brazing, make sure that there is no refrigeration oil residue on the surface.
Since the copper pipes used with the CO
refrigeration unit, make sure that the melted solder material is fully wetting the target position.
4. Airtight test
Carry out the airtight test in accordance with "Airtight Test Procedure ".
5. Evacuation
Carry out the evacuation in accordance with "Vacuum Pump Attachment and Evacuation
Procedure".
6. Refrigerant Charging
Charge the refrigeration unit with refrigerant in accordance with "Refrigerant Charging
Procedure".
refrigeration unit have a thicker wall than the HFC
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