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11
[ WIRING EXAMPLE
]
No. 1 system When using 1 remote controller for
1 indoor unit
No. 2 system For group control or use with 2 remote
controllers
No. 3 system When including BS unit
〈
Precautions when laying power supply wiring
〉
• Wiring of different thicknesses cannot be connected to the
power supply wiring terminal block. (Slack in the power sup-
ply wiring may cause abnormal heat.)
• Use sleeve-insulated round crimp-style terminals for connec-
tions to the power supply wiring terminal block. When none
are available, connect wires of the same diameter to both
sides, as shown in the figure.
Follow the instructions are below if the wiring may get very
hot due to slack in the power supply wiring.
• For wiring, use the designated power supply wiring and con-
nect firmly, then secure to prevent outside pressure being
exerted on the terminal board.
• Use the correct screwdriver for tightening the terminal screws. If
the blade of screwdriver is too small, the head of the screw
might be damaged, and the screw will not be properly tightened.
• If the terminal screws are tightened too hard, screws might
be damaged.
• Refer to the table below for the tightening torque of the termi-
nal screws.
10-2 CONTROL BY 2 REMOTE CONTROLLERS (Con-
trolling 1 indoor unit by 2 remote controllers)
• When using 2 remote controllers, one must be set to “MAIN”
and the other to “SUB”.
MAIN/SUB CHANGEOVER
(1) Insert a
screwdriver into the recess between the
upper and lower part of remote controller and, working
from the 2 positions, pry off the upper part.
The remote controller PC board is attached to the upper
part of remote controller.
Indoor unit A
Indoor unit B
Most
downstream
Indoor unit
Power supply
single phase
60Hz 208-230V
Power supply
single phase
60Hz 208-230V
Power supply
single phase
60Hz 208-230V
Outdoor unit
F
T
1
L1
1
1
1
P
P
2
P
L2
1
2
P
T
F
2
F
P
F
1
2
2
2
P
1
L2
2
P
2
F
IN/D
1
OUT/D
1
P
F
2
F
1
P
L1
F
1
2
T
2
T
1
P
P
2
1
F
2
L2
F
L1
1
2
T T
P
Remote controller
Remote controller
Remote controller
Fig. 16
L1 L2
(option)
(option)
(option)
L1 L2
L1 L2
Outdoor unit
Note) There is not need to set the indoor unit
address when using group control.
(It is automatically set when the power
is turned on.)
Indoor
unit A
Indoor unit B
Most down-
stream
indoor unit
For use with 2
remote controllers
Case of group control
L1 L2
Fig. 17
Remote controller
Remote controller
Remote controller
1
P
2
P
1
P
2
P
1
P
2
P
1
P
P
2
1
F
2
L2
F
L1
L2
L1
1
2
F
F
1
2
F
F
1
2
T T
1
P
P
2
1
F
2
F
1
2
T T
L2
L1
1
P
P
2
1
F
2
F
1
2
T T
IN/D OUT/D
(option)
(option)
Power supply
single phase
60Hz 208-230V
Outdoor unit
BS unit
L1 L2
Indoor unit A
Remote controller
(option)
Fig. 18
F
F
1
2
F
F
1
2
F
F
1
2
F
F
1
2
IN/D
IN/D
OUT/D
OUT/D
1
P
P
2
1
F
2
L2
F
L1
1
2
T T
1
P
2
P
Power supply
single phase
60Hz 208-230V
Terminal block
Tightening torque (ft · lbf)
Remote controller / transmission wiring
terminal block (6P)
0.58 – 0.72
Power supply wiring terminal block (3P)
0.87 – 1.06
Electric wire
Round crimp-style terminal
Insulation sleeve
Connect wires of
the same gauge to
both sides.
Do not connect
wires of the same
gauge to one side.
Do not connect
wires of different
gauges.
Upper part of
remote controller
Lower part of
remote controller
Insert the screwdriver here and gently work
off the upper part of remote controller.
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