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CAUTION
• Be sure to attach the sealing material or putty (field supplied)
to hole of wiring to prevent the infiltration of water as well as
any insects and other small creatures from outside. Other-
wise a short-circuit may occur inside the electric parts box.
• When clamping the wires, be sure no pressure is applied to
the wire connections by using the included clamping material
to make appropriate clamps. Also, when wiring, make sure
the lid on the electric parts box fits snugly by arranging the
wires neatly and attaching the electric parts box lid firmly.
When attaching the electric parts box lid, make sure no wires
get caught in the edges. Pass wiring through the wiring
through holes to prevent damage to them.
• Make sure the remote controller wiring, the wiring between
the units, and other electrical wiring do not pass through the
same locations outside of the unit, separating them by at
least 50mm, otherwise electrical noise (external static) could
cause mistaken operation or breakage.
CAUTION FOR WIRING
• For connection to the terminal block, use ring type crimp style
terminals with insulation sleeve or insulate the wirings properly.
Insulation sleeve
Ring type crimp
style terminal
• Connect the terminal as shown in Fig. 29.
• Do not carry out soldering finish when stranded wires are
used. (Otherwise, the loosening of wires may result in abnor-
mal heat radiation.)
se wires the same in size
(if the air conditioner is in
simultaneous multi operation)
Fig. 29
(Abnormal heating may occur if the wirings are not tightened
securely.)
• Use the required wirings, connect them securely and fix
these wirings securely so that external force may not apply to
the terminals.
• Use a proper screw driver for tightening the terminal screws.
If an improper screw driver is used, it may damage the screw
head and a proper tightening cannot be carried out.
• If a terminal is over tightened, it may be damaged.
Refer to the table shown below for tightening torque of terminals.
Table 3
Terminal block for remote controller and
transmission wirings
Terminal for power supply
Earth terminal
• Do not carry out soldering finish when stranded wirings are
used.
10
Wiring
Fig. 28
Tightening torque (N·m)
0.88 ± 0.08
1.47 ± 0.14
1.69 ± 0.25
WARNING
• When wiring, form the wirings orderly so that the control box
lid can be securely fastened. If the control box lid is not in
place, the wirings may come out or be sandwiched by the
box and the lid and cause electric shocks or a fire.
9-2
WIRING EXAMPLE
• Fit the power supply wiring of each unit with a switch and
fuse as shown in the drawing.
COMPLETE SYSTEM EXAMPLE (3 systems)
Power supply
Main
switch
BS unit
(Only for Heat
recovery
system)
Indoor unit
Remote controller
When using 1 remote controller for 1 indoor unit. (Nor-
1.
mal operation)
Power supply
Outdoor unit
220-240V
Control box
IN/D OUT/D
F
F
F
F
1
2
1
2
50Hz
or
No. 1
220V
System
L N
60Hz
Indoor
Indoor
unit B
unit A
L N
P
P
F
F
T
T
L N
1
2
1
2
1
2
P
P
1
2
For group control or use with 2 remote controllers
2.
Power supply
220-240V
Outdoor unit
Control box
50Hz
IN/D OUT/D
F
1
F
2
F
1
F
2
L N
or
No. 2
220V
System
60Hz
Indoor unit B
Indoor unit A
L N
P
P
F
F
T
T
L N
P
1
2
1
2
1
2
1
P
P
1
2
Power supply wiring
Transmission wiring
Switch
Fuse
Most
downstream
Indoor
Indoor unit
unit C
P
P
F
F
T
T
L N
P
P
F
F
T
T
L N
P
P
1
2
1
2
1
2
1
2
1
2
1
2
1
2
P
P
P
P
1
2
1
2
Most
downstream
Indoor unit C
indoor unit
P
F
F
T
T
L N
P
P
F
F
T
T
L N
P
P
F
F
T
T
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
P
P
1
2
For use with 2
remote controllers
Fig. 30
English
F
F
T
T
1
2
1
2
P
P
1
2
P
P
1
2
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