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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 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.
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)
1. Remove the cover of the electrical control box by taking off the mounting screws (2 positions) and
pushing the hooking section. (The cover of the electrical control box remains hanged to the hinge.)
2. Connect the system interconnection wires and remote controller wire to the terminal block of the
electrical control box.
3. Tighten the screws of the terminal block, and fix the wires with cord clamp attached to the electrical control box.
(Do not apply tension to the connecting section of the terminal block.)
4. Using the attached heat insulation material, seal the pipe connecting port. Otherwise, dewing may be
caused.
5. Mount the cover of the electrical control box without pinching wires.
(Mount the cover after wiring on the ceiling panel.)
1 2 3
A
B
Hinge
Screws (2 positions)
Louver connector
(CN510:White)
Side D (Space: 8.5mm)
Side C (Space: 4mm)
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
3-core stranded
wire 2.5mm²
Side D
Cabtyre
cable
3-core stranded
wire 1.5mm²
Side C
Adhered surface
Notched section
▼
Heat insulation to wiring
connecting port
Power supply terminal block
Remote
controller
terminal
block
Cord clamp
77-EN
78-EN
+001114119401_01EN.book Page 39 Wednesday, October 31, 2012 4:56 PM
