En-11
6. 5. 2. Wiring procedure
• Remove the service panel. And connect the cable to the terminal in accordance with
the terminal name plate.
• Use a ring terminal to connect the electric cables to the power supply terminal board.
• Keep the earth cable longer than the other cables.
• After connecting the electric cable, secure them with a cable clamp.
• Connect the cable without applying excessive tension.
• Use the specifi ed cable type and connect the cable securely.
Secure with a cable clamp as shown in the fi gure below.
Tightening torque
M3 screw 0.5 to 0.6 N·m (5 to 6 kgf·cm)
M5 screw 2.0 to 3.0 N·m (20 to 30 kgf·cm)
Power supply cable
Power supply terminal
Transmission terminal (M3)
Ring terminal (M5)
Cable clamp
Cable clamp
earth cable
Cable tie (accessory)
Transmission cable
8~10 mm
45~50mm
25~30mm
25~40mm
Cable tie (accessory)
Shielding the transmission cable
Connect both ends of the shielded wire of the transmission cable to the earth terminal of
the equipment or to the earth screw near the terminal.
Be very careful that the screws are not overly tightened as the cables may snap and the
terminal may be damaged.
How to connect wiring to the terminal
Caution when wiring cable
(1) Use ring terminals with insulating sleeves as shown in the fi gure to connect to
the terminal block.
(2) Securely clamp the ring terminals to the cables using an appropriate tool so that
the cables do not come loose.
(3) Use the specifi ed cables, connect them securely, and fasten them so that there
is no stress placed on the terminals.
(4) Use an appropriate screwdriver to tighten the terminal screws. Do not use a
screwdriver that is too small, otherwise, the screw heads may be damaged and
prevent the screws from being properly tightened.
(5) Do not tighten the terminal screws too much, otherwise, the screws may break.
(6) See the table below for the terminal screw tightening torques.
Sleeve
Strip : 10mm
Ring terminals
Cable
Screw with special washer
Ring terminals
Terminal blocks
Screw with special washer
Cable
Ring terminals
6. 4. 3. Enabling/Disabling automatic address setting
You can enable/disable automatic address setting for the indoor unit and the signal
amplifi er.
To enable automatic address setting for the indoor unit, connect the indoor unit to out-
door units under the same refrigerant system. (Fig.4)
Example: Disable Automatic Address setting
Refrigerant
system 1
Refrigerant
system 2
Refrigerant
system 3
Transmission line
Transmission line
Transmission line
Example: Enable Automatic Address setting
Refrigerant
system 1
Refrigerant
system 2
Refrigerant
system 3
Transmission line
Transmission line
Transmission line
6. 5. Wiring method
6. 5. 1. Connection diagrams
The wiring example for outdoor units and indoor units is shown in the fi gure.
Power supply
230V 1Ø 50Hz
Power supply
230V 1Ø 50Hz
Power supply
230V 1Ø 50Hz
Power supply
230V 1Ø 50Hz
Outdoor unit
Indoor unit
Power supply
Breaker
Breaker Breaker Breaker
*1 *1 *1
To other refrigerant circuit Outdoor unit
Power supply Power supply Power supply
Transmission
Transmission Transmission Transmission
Indoor unit Indoor unit
Remote
control
Remote
controller
Remote
controller
Remote
controller
Remote
control
Remote
control
*1: The number of power supply terminals is diff erent depending on the indoor unit model.
For the wiring, refer to the indoor unit installation manual.
• There are two types of remote controller: the 2-wire type and the 3-wire type. For
details, see the relevant remote controller installation manual. (When connecting the
2-wire type remote controller, Y3 is not used.)
9380545149-02_IM_EN.indd 119380545149-02_IM_EN.indd 11 9/7/2021 1:38:54 PM9/7/2021 1:38:54 PM
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