Panasonic MAC0105011C3 Service Manual page 56

10.3.4. EVACUATION OF THE EQUIPMENT
WHEN INSTALLING AND AIR CONDITIONER, BE SURE TO EVACUATE THE AIR INSIDE THE
INDOOR UNIT AND PIPES in the following procedure.
1. Connect a charging hose with a push pin to the Low and High
side of a charging set and the service port of the 3-way valve.
- Be sure to connect the end of the charging hose with the
push pin to the service port.
2. Connect the center hose of the charging set to a vacuum pump.
3. Turn on the power switch of the vacuum pump and make sure
that the needle in the gauge moves from 0 cmHg (0 MPa) to -76
cmHg (-0.1 MPa). Then evacuate the air approximately ten minutes.
4. Close the valve of both the Low and High sides of the charging
set and turn off the vacuum pump. Make sure that the needle in
the gauge does not move after approximately five minutes.
Note: BE SURE TO TAKE THIS PROCEDURE IN ORDER TO AVOID
REFRIGERANT GAS LEAKAGE.
5. Disconnect the charging hose from the vacuum pump and from
the service port of the 3-way valve.
6. Tighten the service port caps of the 3-way valve at torque of 18
N.m with a torque wrench.
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