4. Open the valve (Low side) on the charge set and discharge the
refrigerant until the gauge indicates 0.05 MPa (0.5 kg/cm
2
G) to 0.1
MPa (1 kg/cm
2
G).
- If there is no air in the refrigeration cycle (the pressure when
the air conditioner is not running is higher than 0.1 MPa (1 kg/
cm2G), discharge the refrigerant until the gauge indicates 0.05
MPa (0.5 km/cm2G) to 0.1 MPa (1 kg/cm2G). If this is the case,
it will not be necessary to apply a evacuation.
- Discharge the refrigerant gradually; if it is discharged too
suddenly, the refrigeration oil will also be discharged.
5. Turn on refrigerant reclaiming equipment.
11.5. Evacuation
(No refrigerant in the refrigeration cycle)
Procedure:
1. Connect the vacuum pump to the charge set’s centre hose.
2. Evacuation for approximately one hour.
- Confirm that the gauge needle has moved toward -0.1 MPa (-
76 cmHg) [vacuum of 4 mmHg or less.]
3. Close the valve (Low side) on the charge set, turn off the vacuum
pump, and confirm that the gauge needle does not move
65
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