
Installation EDUS39-900A-F11_a
22 FXMQ-M
2. Tightening torque for the terminal screws.
• 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
terminal screws.
3. Do not connect wires of different gauge to the same
grounding terminal. Looseness in the connection may
deteriorate protection.
4. Outside of the unit, keep transmission wiring at least 2in.
away from power supply wiring. The equipment may mal-
function if subjected to electrical (external) noise.
5. For remote controller wiring, refer to the “INSTALLATION
MANUAL OF REMOTE CONTROLLER” attached to the
remote controller.
6. Never connect power supply wiring to the terminal
block for remote controller wiring. A mistake of the
sort could damage the entire system.
7. Use only specified wire and tightly connect wires to termi-
nals. Be careful wires do not place external stress on termi-
nals. Keep wiring in neat order and so as not to obstruct
other equipment such as popping open the electrical compo-
nents box lid. Make sure the lid closes tight. Incomplete con-
nections could result in overheating, and in worse case,
electric shock or 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)
1. When using 1 remote controller for 1 indoor unit. (Nor-
mal operation)
2. For group control or use with 2 remote controllers
3. When including BS unit
[ PRECAUTIONS ]
1. A single switch can be used to supply power to units on
the same system. However, branch switches and branch
ground fault circuit interrupters must be selected carefully.
2. Do not ground the equipment on gas pipes, water pipes or
lightning rods, or crossground with telephones. Improper
grounding could result in electric shock.
Terminal Size
Tightening torque (ft·lbf)
Terminal block for remote controller (6P)
M3.5 0.58 - 0.72
Power supply terminal block
Ground terminal
M5
M5
1.76 - 2.15
2.23 - 3.01
Power supply wiring
Transmission wiring
Switch
Fuse
Power supply
Main
switch
Remote controller
Indoor unit
BS unit
(Only for
Heat
recovery system)
L1 L2
L1
IN/D OUT/D
F
1 F2 F1 F2
Control box
L1 L2
L1 L2
P
1
P
2
P
1
P
2
F
1
F
2
T
1
T
2
P
1
P
2
P
1
P
2
F
1
F
2
T
1
T
2
L1 L2
P
1
P
2
P
1
P
2
F
1
F
2
T
1
T
2
L1 L2 L1 L2
P
1
P
2
P
1
P
2
F
1
F
2
T
1
T
2
L1
Outdoor unit
No. 1
System
Indoor
unit A
Indoor
unit B
Indoor
unit C
Most
downstream
Indoor unit
Power supply
208-230V
60Hz
Power supply
208-230V
60Hz
Power supply
208-230V
60Hz
Power supply
208-230V
60Hz
L2 L2
L1 L2 L1 L2 L1 L2
Indoor unit A
IN/D OUT/D
F
1 F2 F1 F2
Control box
P
1
P
2
P
1
P
2
F
1
F
2
T
1
T
2
P
1
P
2
F
1
F
2
T
1
T
2
P
1
P
2
F
1
F
2
T
1
T
2
P
1
P
2
F
1
F
2
T
1
T
2
P
1
P
2
P
1
P
2
L1 L2
Outdoor
unit
No. 2
System
Indoor unit B
Indoor unit C
Most
downstream
indoor unit
For use with 2
remote controllers
Power supply
208-230V
60Hz
Power supply
208-230V
60Hz
Power supply
208-230V
60Hz
Power supply
208-230V
60Hz
Note: It is not necessary to designate indoor unit address
when using group control.
The address is automatically set when power is
activated.
Fig. 3
L1 L2L1 L2L1 L2L1 L2
IN/D OUT/D
F
1 F2 F1 F2
IN/DOUT/D
F
1 F2 F1 F2
L1 L2
P
1
P
2
P
1
P
2
F
1
F
2
T
1
T
2
BS unit
No. 3
System
Outdoor unit
Power supply
208-230V
60Hz
Indoor unit A
Most
downstream
indoor unit
Power supply
208-230V
60Hz
Control box
Control box
IN/DOUT/D
F
1 F2 F1 F2
BS unit
Control box
L1
P
1
P
2
P
1
P
2
F
1
F
2
T
1
T
2
L2
L1 L2 L1 L2
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