A B
1
1
2
2
3
3
A B
1
2
3
A B
1
1
2
2
3
3
A B
1
2
3
A B
1
2
3
A B
1
2
3
A B
1
2
3
1
2
3
1 2 3
B
A
– 16 –
■
Wiring between indoor unit and outdoor unit
• Figure below shows the wiring connections between the indoor and outdoor units and between the indoor units
and remote controller. The wires indicated by the broken lines or dot-and-dash lines are provided at the locally.
• Refer to the both indoor and outdoor unit wiring diagrams.
Wiring diagram
Single system
Remote controller
Remote controller wiring
Indoor side
Indoor/Outdoor connecting
wires
Outdoor side
Simultaneous twin system
Remote controller
Remote controller wiring
Indoor side
Indoor/Outdoor connecting wires
Outdoor side
Simultaneous triple and double twin system
Remote controller
inter-unit wiring
Remote controller
Remote controller wiring
Indoor side
Indoor/Outdoor
connecting wires
Outdoor side
Indoor side
Power supply
Power supply
Power supply
Triple
Double twin
Indoor power
inter-unit wiring
Indoor power
inter-unit wiring
Indoor power
inter-unit wiring
Indoor side
Indoor side
Remote controller
inter-unit wiring
Remote controller
inter-unit wiring
* Use 2-core shield wire (MVVS 0.5 to 2.0 mm
2
or more) for the remote controller wiring in the simultaneous twin,
simultaneous triple and simultaneous double twin systems to prevent noise problems. Connect both ends of the
shield wire to earth leads.
* Connect earth wires for each indoor unit in the simultaneous twin, simultaneous triple and simultaneous double
twin systems.
Remote controller
inter-unit wiring
Indoor
side
Indoor power
inter-unit wiring
Electrical control
box cover
P.C. board
Terminal block
Indoor/Outdoor
connecting wires
Run the Indoor/Outdoor
connecting wires here
through the clamp base
and
fi
x it with a cord
clamp.
▼
Connecting the Indoor/Outdoor connecting wires
◆
Wire connection
REQUIREMENT
• Connect the wires matching the terminal numbers. Incorrect connection causes a trouble.
• Pass the wires through the bushing of wire connection holes of the indoor unit.
• Keep a margin (Approx. 100 mm) on a wire to hang down the electrical control box at servicing.
• The low-voltage circuit is provided for the remote controller. (Do not connect the high-voltage circuit)
1
Loosen the cover mounting screws (2 positions) of the electrical control box, and then remove the
cover.
2
Connect the Indoor/Outdoor connecting wires and the remote controller wire to the terminal block of
the electrical control box.
3
Tighten screws of the terminal block securely, and
fi
x the wires with code clamp attached to the
electrical control box. (Do not apply tension to the connecting section of the terminal block.)
4
Mount the cover of the electrical control box so that it does not pinch the wires.
Two screws
Terminal block of
power supply
<Single connection>
Remote controller
terminal block
Earth screw
Clamp base
Cord clamp
Indoor/Outdoor connecting wires
