Panasonic CS-BE20TKD / CU-BE20TKD Service Manual ▷ View online
25
7 Remove the tapes and connect the power supply cord and connection cable between indoor unit and outdoor
unit according to the diagram below.
8 Secure the power supply cord and connection cable onto the control board with the holder.
9 Close grille door by tighten with screw and close the front panel.
9 Close grille door by tighten with screw and close the front panel.
Note:
Isolating Devices (Disconnecting means) should have minimum 3.0 mm contact gap.
Ensure the colour of wires of outdoor unit and the terminal Nos. are the same to the indoor’s respectively.
Earth wire shall be Yellow/Green (Y/G) in colour and longer than other AC wires as shown in the figure for the
electrical safety in case of the slipping out of the cord from the anchorage.
11.2.4.1 Wire Stripping and Connecting Requirement
3
2
1
t
i
n
u
r
o
o
d
t
u
o
e
h
t
n
o
s
l
a
n
i
m
r
e
T
Colour of wires (connection cable)
Terminals on the indoor unit
L
N
1
2
3
(Power supply cord)
Terminals on the isolating devices
(Disconnecting means)
(Disconnecting means)
(L) (N)
Recommended
length (mm)
length (mm)
a b
c
d e
f
g
55 35 35 50 40 35 60
WARNING
This equipment must
be properly earthed.
Recommended
length (mm)
Tape
Connection cable
Tape
Power supply cord
Terminal Board
Control
Board
Earth wire
longer than
others
AC wires
for safety
reason
longer than
others
AC wires
for safety
reason
Holder
Holder
Indoor & outdoor
connection cable
connection cable
Isolating Devices
Outdoor unit
Power supply
cord
OR
OR
OR
Do not joint wires
Use complete wire without joining.
Use approved socket and plug with earth pin.
Wire connection in this area must follow to national wiring rules.
Conductor
over inserted
Wire stripping
No loose strand
when inserted
when inserted
10 ± 1 mm
Conductor
fully inserted
PROHIBITED
Conductor not
fully inserted
PROHIBITED
ACCEPT
Indoor/outdoor
connection
terminal board
connection
terminal board
5 mm or more
(gap between wires)
WARNING
RISK OF FIRE
JOINING OF WIRES
MAY CAUSE
OVERHEATING AND
FIRE.
JOINING OF WIRES
MAY CAUSE
OVERHEATING AND
FIRE.
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11.3 Outdoor Unit
11.3.1 Install the Outdoor Unit
After selecting the best location, start installation 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, screws or nails.
Model A
B
C
D
BE20***
KE25***, BE25***, DE25***
KE35***, BE35***, DE35***
KE25***, BE25***, DE25***
KE35***, BE35***, DE35***
570 mm 105 mm 18.5 mm 320 mm
KE50***, BE50***, DE50*** 540 mm 160 mm 18.5 mm 330 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
joint portion of tube assembly) onto the copper pipe.
(In case of 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.
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)]
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 valve and then tighten with
torque wrench to the specified torque as stated in the
table.
Remove burrs from cut edge.
Make flare after inserting the flare nut (locate at valve)
onto the copper pipe.
Align center of piping to valve and then tighten with
torque wrench to the specified torque as stated in the
table.
A
B
C
D
Torque
wrench
wrench
Spanner or
Wrench
Wrench
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11.3.3 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.
PIPES in the following procedure.
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
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 REFRIGERANT GAS LEAKAGE.
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 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 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 location of leak.
-
Do not release refrigerant during piping work for installation and reinstallation.
-
Take care of the liquid refrigerant, it may cause frostbite.
OPEN
CLOSE
Gas side
Liquid side
Outdoor unit
Two-way valve
Three-way valve
Indoor unit
Vacuum
pump
pump
Close
Close
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11.3.4 Connect the Cable to the Outdoor Unit
1 Remove the control board cover from the unit
by loosening the screw.
2 Connection cable between indoor unit and
outdoor unit shall be approved
polychloroprene sheathed 4 x 1.5 mm
polychloroprene sheathed 4 x 1.5 mm
2
(3/4 ~ 1.5HP) or 4 x 2.5 mm
2
(2.0HP) flexible
cord, type designation 60245 IEC 57 or
heavier cord. Do not use joint connection
cable. Replace the wire if the existing wire
(from concealed wiring, or otherwise) is too
short. Allowable connection cable length of
each indoor unit shall be 30 mm or less.
heavier cord. Do not use joint connection
cable. Replace the wire if the existing wire
(from concealed wiring, or otherwise) is too
short. Allowable connection cable length of
each indoor unit shall be 30 mm or less.
3 Secure the cable onto the control board with
the holder.
4 Attach the control board cover back to the
original position with screw.
5 For wire stripping and connection requirement,
refer to instruction 11.2.4.1 of indoor unit.
WARNING
This equipment must be properly earthed.
Earth wire shall be Yellow/Green (Y/G) in colour
and longer than other AC wires for safety reason.
11.3.5 Piping
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 6 mm or above.
11.3.6 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
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.
Terminals on the outdoor unit
1
2
3
Colour of wires
Terminals on the indoor unit
1
2
3
Earth Wire
longer than
others AC
wires for
safety reason
longer than
others AC
wires for
safety reason
Terminal
Board
Board
Holder
Indoor and outdoor
cable connection
Indoor Unit
When properly fl ared, the internal surface of the
fl are will evenly shine and be of even thickness.
Since the fl are part comes into contact with the
connections, carefully check the fl are fi nish.
fl are will evenly shine and be of even thickness.
Since the fl are part comes into contact with the
connections, carefully check the fl are fi nish.
Improper fl aring
Inclined Surface
damaged
Cracked Uneven
thickness
1. To cut
2. To remove burrs
3. To fl are
Bar
Red arrow mark
Handle
Core
Yoke
Clamp handle
Bar
0 – 0.5 mm
Copper pipe
Reamer
Point down
Pipe
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