Panasonic CU-2E15LBE, Service Manual

Page: 39 / 103

39
1. Connect a charging hose with a push pin to the Low 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 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 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 in the gauge
does not move after approximately 5 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 a torque of 18 N
•
m with a torque wrench.
7. Remove the valve caps of the both 3-way valves. Position both of the valves to “OPEN” using a hexagonal wrench (4 mm).
8. Mount valve caps onto the both 3-way valve.
• Be sure to check for gas leakage.
10.1.6.
Connect The Cable To The Outdoor Unit
1. Remove the control board cover metal from the unit by
loosening two screws.
2. Connecting cable between indoor unit and outdoor unit
shall be approved polychloroprene sheathed 4 x 1.5 mm
2
flexible cord, type designation 245 IEC 57 (H05RN-F) or
heavier cord.
3. Secure the cable onto the control board with the holder
(clamper).
4. Attach the control board cover in its original position with
the screw.
10.1.7. Pipe Insulation
1. Please carry out insulation at pipe connection portion as mentioned in Indoor/Outdoor Unit Installation Diagram. Please wrap
the insulated piping end to prevent water from going inside the piping.
2. If drain hose or connecting piping is in the room (where dew may form), please increase the insulation by using POLY-E
FOAM with thickness 6mm or above.
CAUTION
• If gauge needle does not move from 0 cmHg (0 MPa) to -76 cmHg (-0.1 MPa), in step above take the following measure:
• 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.