19-EN
20-EN
– 10 –
10
Electrical connection
WARNING
•
Use the speci
fi
ed wires for wiring connect the terminals. Securely
fi
x them to prevent external forces
applied to the terminals from affecting the terminals.
Incomplete connection or
fi
xation may cause a
fi
re or other trouble.
•
Connect earth wire. (grounding work)
Incomplete grounding cause an electric shock.
Do not connect earth wires to gas pipes, water pipes, lightning conductor or telephone earth wires.
•
Appliance shall be installed in accordance with national wiring regulations.
Capacity shortage of power circuit or incomplete installation may cause an electric shock or a
fi
re.
CAUTION
•
For power supply speci
fi
cations, follow the Installation Manual of outdoor unit.
•
Do not connect 220 – 240 V power to the terminal blocks (
3
,
4
,
,
) for control wiring.
Otherwise, the system will fail.
•
Do not damage or scratch the conductive core and inner insulator of power and system interconnection wires
while peeling them.
•
Perform the electric wiring so that it does not come to contact with the high-temperature part of the pipe.
The coating may melt resulting in an accident.
•
Do not turn on the power of the indoor unit until vacuuming of the refrigerant pipes completes.
■
System interconnection wires speci
fi
cations
System interconnection wires*
4 x 1.5 mm
2
or more
(H07 RN-F or 60245 IEC 66)
Up to 70 m
*Number of wire x wire size
Remote controller wiring
Remote controller wiring, remote
controller inter-unit wiring
Wire size: 2 × 0.5 to 2.0 mm
2
Total wire length of remote controller
wiring and remote controller inter-unit
wiring = L + L1 + L2 + … Ln
In case of wired type only
Up to 500 m
2 remote controllers
Up to 300 m
2 remote controllers including a
wireless remote controller
Up to 400 m
Total wire length of remote controller inter-unit wiring = L1 + L2 + … Ln
Up to 200 m
CAUTION
The remote controller wire and system interconnection wires cannot be parallel to contact each other
and cannot be stored in the same conduits. If doing so, a trouble may be caused on the control system
due to noise or other factor.
L1
L
n
L
2
L
Remote
controller
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Remote
controller
wiring
(max. 8 units)
Remote controller inter-unit wiring
■
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
▼
Single system
Power supply
Remote controller
Remote controller wiring
Indoor side
System interconnection
wires
Outdoor side
▼
Simultaneous twin system
Power supply
Remote controller
Remote controller wiring
Indoor side
System interconnection
wires
Outdoor side
Remote controller
inter-unit wiring
Indoor
side
Indoor power
inter-unit wiring
▼
Simultaneous triple and double twin system
Remote controller
Remote
controller wiring
Indoor side
System inter-
connection wires
Outdoor side
Remote
controller
inter-unit
wiring
Remote
controller
inter-unit
wiring
Remote
controller
inter-unit
wiring
Indoor
side
Indoor
side
Indoor
side
Indoor power
inter-unit
wiring
Indoor power
inter-unit wiring
Triple
Double twin
Power supply
*
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. 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.
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1111056499_(01)_EN.indb 10
10/13/14 9:13 AM
10/13/14 9:13 AM
