Evacuation Of The Equipment - Panasonic CS-HE9JKE Service Manual

11.4.3. EVACUATION OF THE EQUIPMENT

WHEN INSTALLING AN AIR CONDITIONER, BE SURE TO EVACUATE THE AIR INSIDE THE INDOOR UNIT AND PIPES in the
following procedure.
1. Connect a quick-coupling charging hose to the Low and High sides of a charging set and to the service port of the 3-way
valve.
• Be sure to connect the end of the charging hose with quick coupling to the service port.
2. Connect the centre hose of the charging set to a vacuum pump with check valve, or to a vacuum pump with suitable adaptor.
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 for about 15 minutes.
4. Close the Low and High side valves of the charging set and turn off the vacuum pump. Make sure that the needle of the gauge
doesn't move after about 5 minutes.
Note: FOLLOW THIS PROCEDURE CAREFULLY 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 a torque of 18 N
7. Remove the valve caps of both of the 2-way valve and 3-way valve. Position both of the valves to "OPEN" using a hexagonal
wrench (4 mm).
8. Mount valve caps onto the 2-way valve and the 3-way valve.
• Be sure to check for gas leakage.
• If gauge needle does not move from 0 cmHg (0 MPa) to -76 cmHg (-0.1 MPa), in step
- If the leak stops when the piping connections are tightened further, continue working from step
- If the leak does not stop when the connections are retightened, repair the location of leak.
- Do not release refrigerant during piping work for installation and reinstallation.
- Take care of the liquid refrigerant, it may cause frostbite.
m with a torque wrench.
O
above take the following measure:
28
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