Panasonic CU-2C18BKP5G Service Manual page 47

10.3.4. 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.
CAUTION
• If gauge needle does not move from 0 cmHg (0 MPa) to -76 cmHg (-0.1 MPa), in step 3 above take the following measure:
• If the leak stops when the piping connections are tightened further, continue working from step 3.
• 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.
CS-C9BKPG CU-2C14BKP5G / CS-C9BKPG CU-2C18BKP5G / CS-C9BKPG CU-3C20BKP5G / CS-C7BKPG CU-2C19BKP5G / CS-C12BKPG
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 with check valve, or vacuum pump and vacuum pump
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
approximately ten minutes.
4. Close the Low side valve 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 FOLLOW 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.
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.
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