En-7
Connection cable preparation
6
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Earth (ground) wire
Power supply cable
or connection cable
Keep the earth (ground) wire longer than the other wires.
• Use a 4-core wire cable.
30 mm
40 mm or more
How to connect wiring to the terminals.
(For strand wiring)
Use crimp-type terminals with insulating sleeves as shown in the figure below to
(1)
connect to the terminal block.
Securely crimp the crimp-type terminals to the wires using an appropriate tool so that
(
2
)
the wires do not come loose.
Strip 10 mm
Crimp-type
terminal
Sleeve
Use the specified wires, connect them securely, and fasten them so that there is no
(3)
stress placed on the terminals.
Use an appropriate screwdriver to tighten the terminal screws.
(4)
Do not use a screwdriver that is too small, otherwise, the screw heads may be
damaged and prevent the screws from being properly tightened.
Do not tighten the terminal screws too much, otherwise, the screws may break.
(5)
See the table below for the terminal screw tightening torques.
(
6
)
WARNING
Use crimp-type terminals and tighten the terminal screws to the specified torques,
otherwise, abnormal overheating may be produced and possibly cause serious
damage inside the unit.
Tightening torque [N·m (kgf·cm)]
M4 screw
1.2 to 1.8 (12 to 18)
M5 screw
2.0 to 3.0 (20 to 30)
Screw with
special washer
Crimp-type
terminal
Terminal blocks
Wire
Wire
Screw with
special
washer
Crimp-type
terminal
Connection wiring
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CAUTION
Use care not to mistake the power supply cable and connection wires when installing.
Install so that the wires for the remote controller will not come in contact with other
connection wires.
(1) Remove the control box cover and install each connection wire.
Control box
cover
Loosen the screws.
(4 locations)
Control line
Connection cable
Power line
Outdoor unit
Earth (ground)
Black
White
Red
Remote
controller
*Earth
(ground)
wire
*Ground the remote controller if it has a earth (ground) wire.
(2)
After wiring is complete, secure the remote controller cable, connection cable, and
power supply cable with the cable clamps.
Connection cable
(to outdoor unit)
Remote controller
cable
Cable tie (Medium)
(Accessory)
Control box
(3) Seal the cable outlet or other gaps with putty to prevent dew condensation or insect
from entering the electric control box.
(4) Install the control box cover.
CAUTION
Do not bundle the remote controller cable, or wire the remote controller cable in
parallel, with the indoor unit connection wire (to the outdoor unit) and the power supply
cable. It may cause erroneous operation.
REMOTE CONTROLLER SETTING
7
1
CAUTION
When using the temperature sensor of remote controller,
be sure to meet the following location requirements for
installation of the remote controller in order to detect the
room temperature correctly. If the remote controller is
installed in an improper location, troubles such as “the
room does not become cool or warm” may occur even
though there is no problem in the air conditioner.
Temperature sensor
A location where the average room temperature can be detected.
•
A location that is not directly exposed to the air blown out of the indoor unit.
•
A location that is not exposed to direct sunlight.
•
A location that is not affected by any heat source.
•
Do not touch the remote controller PC board and PC board parts directly with your hands.
Install the remote controller wires so as not to be direct touched with your hand.
Do not wire the remote controller cable and the bus wire together with or parallel to
the connection cables, transmission cables, and power supply cables of the indoor
and outdoor units. It may cause erroneous operation.
When installing the bus wire near a source of electromagnetic waves, use shielded wire.
Do not set the DIP switches, either on the air conditioner or the remote controller, in
any way other than indicated in this manual or the manual that is supplied with the air
conditioner. Doing so may result in an accident.
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