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Wiring between indoor unit and outdoor unit
1. 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.
2. Refer to the both indoor and outdoor unit wiring diagrams.
3. The power of the indoor unit is supplied from the outdoor unit.
Wiring diagram
* Use 2-core shield wire (MVVS 0.5 to 2.0 mm
2
or more) for the remote controller wiring in the simultaneous triple
and simultaneous double twin systems to prevent noise problems. Be sure to 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.
Single system
Simultaneous twin system
Simultaneous triple and double twin system
A
B
1
1
2
2
3
3
Outdoor side
Power supply
Remote controller
Remote controller wiring
Indoor side
System interconnection
wires
A
B
1
2
3
A
B
1
1
2
2
3
3
Power supply
Remote controller
inter-unit wiring
Indoor
side
Indoor power
inter-unit wiring
Outdoor side
Remote controller
Remote controller wiring
Indoor side
System interconnection wires
A
B
1
2
3
A
B
1
2
3
A
B
1
2
3
A
B
1
2
3
1
2
3
Power supply
Remote controller
inter-unit wiring
Indoor side
Indoor power
inter-unit wiring
Remote controller
inter-unit wiring
Indoor side
Remote controller
inter-unit wiring
Indoor side
Triple
Double twin
Indoor power
inter-unit wiring
Indoor power
inter-unit wiring
Outdoor side
Remote controller
Remote controller
wiring
Indoor side
System
interconnection 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 or other purpose.
• The low-voltage circuit is provided for the remote controller. (Do not connect the high-voltage circuit)
•
Remote controller wiring
Strip off approx. 9 mm the wire to be connected.
Wiring diagram
• Before performing wiring work in the electrical control box, remove the
air filter and the cover of the box (fixed with 2 screws).
• Remove screw A, and loosen screw B.
• Pull up and open the electrical control box cover.
• Tighten the screws of the terminal block firmly, and fix the wires with
the cord clamps attached to the electrical control box. (Do not apply
tension to the connecting section of the terminal block.)
• Slide the electrical control box cover to install it. Do not pinch the wire
and make the gap as small as possible when installing the cover.
Remove screw A.
Loosen screw B.
Electrical control
box cover
System interconnection
wire
Cord clamp
Remote controller
wiring
Earth screw
Select side C or D for the power cable clamping position referring to
the following table according to the cable type and diameter.
* Cable clamp can be attached on either right or left side.
When twin system are connected, clamp two cables with one cable
clamp.
Wire type
Specification
Cable clamping position
Cabtyre cable
4-core stranded wire 2.5 mm²
Side D
Cabtyre cable
4-core stranded wire 1.5 mm²
Side C
Side D (Space: 8.5 mm)
Side C (Space: 4 mm)
1
3
10
30
10
50
2
System interconnection wire
Earth wire
2 mm or
les
s
System interconnection wire
See the figure on the left for
system interconnection wires to
the terminal block.
A
B
A
B
Terminal block
Remote
controller
unit
Terminal block for remote
controller wiring of indoor unit
Remote controller wire
(Locally procured)
75-EN
76-EN
+00EH99884801-2_01EN.book Page 38 Monday, January 28, 2013 7:54 PM
