Panasonic CS-W18MKD / CS-W24MKD / CU-W18MKD / CU-W24MKD Service Manual ▷ View online
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11.2.4 Connect the Cable to the Indoor Unit
1 The inside and outside connection cable can be connected without removing the front grille.
2 Connection cable between indoor unit and outdoor unit shall be approved polychloroprene sheathed 5 x
2 Connection cable between indoor unit and outdoor unit shall be approved polychloroprene sheathed 5 x
2.5 mm
2
(2.0 ~ 2.5HP) flexible cord, type designation 245 IEC 57 or heavier cord.
o
Secure the connection cable onto the control board with the holder.
WARNING
This equipment must be properly earthed.
o
Ensure the colour of wires of outdoor unit and the terminal Nos. are the same to the indoor’s
respectively.
respectively.
o
Earth wire shall be Yellow/Green (Y/G) in colour and longer than other AC wires for safety reason.
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11.2.5 Wire Stripping And Connecting Requirement
11.2.5.1
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 are not removed, gas leakage may be caused. Turn the piping
2 Remove the burrs by using reamer. If burrs are 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.
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11.3 Outdoor Unit
11.3.1 Install the Outdoor Unit
After selecting the best location, start installation according to Indoor/Outdoor Unit Installation Diagram.
1 Fix the unit on concrete or rigid frame firmly and horizontally by bolt nut (ø10 mm).
2 When installing at roof, please consider strong wind and earthquake.
2 When installing at roof, please consider strong wind and earthquake.
Please fasten the installation stand firmly with bolt or nails.
A
B
C
D
Model A
B
C
D
W18***, W24***
613 mm 131 mm 16 mm 360.5 mm
11.3.2 Connect the Piping
11.3.2.1 Connecting
the piping to indoor
Please make flare after inserting flare nut (locate at joint portion, of tube assembly) onto the copper pipe. (In case of
using long piping)
Connect the piping
using long piping)
Connect the piping
Align the center of piping and sufficiently tighten the flare nut with fingers.
Further tighten the flare nut with torque wrench in specified torque as stated in the table.
11.3.2.2 Connecting
the
piping to outdoor
Decide piping length and then cut by using pipe cutter. Remove burrs from cut edge.
Make flare after inserting the flare nut (locate at valve) onto the copper pipe.
Align center of piping to valves and then tighten with torque wrench to the specified torque as stated in the table.
Make flare after inserting the flare nut (locate at valve) onto the copper pipe.
Align center of piping to valves and then tighten with torque wrench to the specified torque as stated in the table.
Torque
wrench
wrench
Spanner
or Wrench
or Wrench
Do not overtighten, overtightening may cause gas leakage.
Piping size
Torque
6.35 mm (1/4”)
[18 N•m (1.8 kgf.m)]
9.52 mm (3/8”)
[42 N•m (4.3 kgf.m)]
12.7 mm (1/2”)
[55 N•m (5.6 kgf.m)]
15.88 mm (5/8”)
[65 N•m (6.6 kgf.m)]
19.05 mm (3/4”)
[100 N•m (10.2 kgf.m)]
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11.3.3 Evacuation of the Equipment
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.
o
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
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 TAKE THIS PROCEDURE IN ORDER TO AVOID REFRIGERENT GAS LEAKAGE.
Note: BE SURE TO TAKE THIS PROCEDURE IN ORDER TO AVOID REFRIGERENT 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 both of the 2-way valve and 3-way valve. Position both of the valves to “OPEN”
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 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.
o
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 the step e above take the following measure:
-
If the leak stops when the piping connections are tightened further, continue working from step e.
-
If the leak does not stop when the connections are retightened, repair location of leak.
-
Do not release refrigerant during piping work for installation and reinstallation.
-
Take care of the liquid refrigerant, it may cause frostbite.
11.3.4 Connect the cable to the Outdoor Unit
1 Remove the control board cover from the
unit by loosening the screw.
2 Connecting cable between indoor unit and
outdoor unit shall be approved
polychloroprene sheathed 5 × 2.5 mm
polychloroprene sheathed 5 × 2.5 mm
2
(2.0 ~
2.5HP) flexible cord, type designation 245 IEC
57 or heavier cord.
57 or heavier cord.
3 Secure the cable onto the control board with
the holder.
4 Attach the control board cover back to the
original position with the screw.
5 For wire stripping and connection requirement,
refer to instruction g of the indoor unit.
WARNING
This equipment must be properly earthed.
Earth wire shall be Yellow/Green (Y/G) in colour and longer than the other AC wires for safety reason.
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