Evacuation Of The Equipment - Panasonic CS-A28BKP5 Service Manual

CUTTING AND FLARING THE PIPING
1. Please cut using pipe cutter and then remove the burrs.
2. Remove the burrs by using reamer. If burrs is not
removed, gas leakage may be caused.
Turn the piping end down to avoid the metal powder
entering the pipe.
3. Please make flare after inserting the flare nut onto the
copper pipes.

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.
If air remains in the indoor unit and refrigeration pipes, it will
affect the compressor, reduce to cooling capacity, and could
lead to a malfunction.
SERVICE PORT CAP
Be sure, using a torque wrench to tighten the service port cap
(after using the service port), so that it prevents the gas
leakage from the refrigeration cycle.
Procedure:
1. Connect a charging hose with a push pin to the Low and
High sides 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.
7. Remove the valve caps of both the 3-way valve. Position
both of the valves to "OPEN" using a hexagonal wrench (4
mm).
8. Mount valve caps both of the 3-way valves.
• Be sure to check for gas leakage.
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.
10.3.5. CONNECT THE CABLE TO THE
OUTDOOR UNIT
(FOR DETAIL REFER TIO WIRING DIAGRAM AT UNIT)
1. Remove the control board cover from the unit by loosening
the screw.
2. Indoor/outdoor connecting cable between indoor unit and
outdoor unit shall be approved polychorprene sheathed 5 ×
2
2.5 mm flexible cord 245 IEC 57 ,type designation HO5
RN-F or heavier cord.
3. Secure the cable onto the control board with the holder
(clamper).
4. Attach the control board cover to the original position with
the screw.
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CS-A28BKP5/CU-A28BKP5