Procedure:
1. Connect the vacuum pump to the charge set’s centre hose.
2. Turn on the vacuum pump to evacuate the unit.
- Confirm that the gauge needle has moved toward -76 cmHg (-
0.1 MPa).
- Apply the vacuum for approximately 1 hour (vacuum of 4
mmHg or less).
3. Close the valve (Low side and High side) on the charge set, turn
off the vacuum pump, and confirm that the gauge needle does not
move (approximately 5 minutes after the vacuum pump is turned
off).
4. Disconnect the charge hose from the vacuum pump.
11.6. Gas charging
(After Evacuation)
54
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