En-9
6. ELECTRICAL WIRING
WARNING
Electrical work must be performed in accordance with
•
this Manual by a person certified under the national or
regional regulations. Be sure to use a dedicated circuit
for the unit.
An insufficient power supply circuit or improperly per
-
formed electrical work can cause serious accidents such
as electric shock or fire.
Before starting work, check that power is not being sup-
•
plied to the indoor unit and outdoor unit.
Use the included connection cables and power cables or
•
ones specified by the manufacturer. Improper connec
-
tions, insufficient insulation, or exceeding the allowable
current can cause electric shock or fire.
For wiring, use the prescribed type of wires, connect
•
them securely, making sure that there are no external
forces of the wires applied to the terminal connections.
Improperly connected or secured wires can cause seri-
ous accidents such as overheating the terminals, electric
shock, or fire.
Do not modify the power cables, use extension cables,
•
or use any branches in the wiring. Improper connections,
insufficient insulation, or exceeding the allowable current
can cause electric shock or fire.
Match the terminal block numbers and connection cable
•
colors with those of the outdoor unit. Erroneous wiring
may cause burning of the electric parts.
Securely connect the connection cables to the terminal
•
blocks. In addition, secure the cables with wiring holders.
Improper connections, either in the wiring or at the ends
of the wiring, can cause a malfunction, electric shock, or
fire.
Always fasten the outside covering of the connection
•
cable with the cable clamp. (If the insulator is chafed,
electric leakage may occur.)
Securely install the electrical box cover on the unit.
•
An improperly installed electrical box cover can cause
serious accidents such as electric shock or fire through
exposure to dust or water.
Install sleeves into any holes made in the walls for wiring.
•
Otherwise, a short circuit could result.
Install a ground leakage breaker. In addition, install the
•
ground leakage breaker so that the entire AC main power
supply is cut off at the same time. Otherwise, electric
shock or fire could result.
Install a ground leakage breaker.
•
If a ground leakage breaker is not installed, it may cause
electric shock or fire.
Always connect the ground wire.
•
Improper grounding work can cause electric shocks.
Install the remote controller wires so as not to be direct
•
touched with your hand.
6.1. Electrical requirement
Connection cable (mm
2
)
MAX.
MIN.
2.5
1.5
Use conformed cable with Type 245 IEC57.
•
Perform all electrical work according to the standard.
•
Install circuit breakers, which have the terminal spacing
•
of more than 3 mm, in a place of near the indoor unit and
outdoor unit.
CAUTION
Be sure to execute the electrical work according to the
•
Laws of each country and the Installation Instructions.
In addition, be sure to set as exclusive line and use the
rated voltage and circuit breaker.
6.2. Wiring method
6.2.1. Connection diagrams
Connection cable (to outdoor unit)
•
3
2
1
Power line
Control line
Indoor unit
side
Wired remote controller cable
•
3
2
1
Black
White
Red
*
Indoor unit
side
*
Ground the remote controller if it has a ground wire.
6.2.2. Connection cable preparation
Power supply cable
or connection cable
30 m
m
40 mm or
more
Earth wire
• Use a 4-core wire cable
.
Keep the earth wire longer than the other wires.
How to connect wiring to the terminals.
(For strand wiring)
Use crimp-type terminals with insulating sleeves as shown
(1)
in the figure below to connect to the terminal block.
Securely crimp the crimp-type terminals to the wires using
(2)
an appropriate tool so that the wires do not come loose.
Sleeve
Crimp-type
terminal
Strip 10 mm
1125-9379122009.indd 9
2008/11/26 7:57:05
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