En-9
6.4.3. Enabling/Disabling automatic address setting
You can enable/disable automatic address setting for the indoor unit and the signal ampli-
fier.
To enable automatic address setting for the indoor unit, connect the indoor unit to outdoor
units under the same refrigerant system.
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
Breaker 1: Ground Fault Equipment
Breaker (GFEB)
Breaker 2: Maximum Circuit Breaker
(MAX. CKT. BKR)
Power supply
208/230V ~ 60Hz
To other refrigerant circuit
outdoor unit
Outdoor unit
Transmission
Transmission
Transmission
Transmission
Transmission
Power supply
Remote control
Remote control
Remote control
Power supply
Power supply
Power supply
Indoor unit
Power supply
208/230V ~ 60Hz
Remote
controller
*1
*1
*1
Remote
controller
Remote
controller
Power supply
208/230V ~ 60Hz
Power supply
208/230V ~ 60Hz
Indoor unit
Indoor unit
Breaker 1
Breaker 1
Breaker 1
Breaker 1
Breaker 2
Breaker 2
Breaker 2
Breaker 2
*1: The number of power supply terminals is different 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.)
The wiring example for outdoor and indoor units is shown in figure.
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 specified cable type and connect the cable securely.
Secure with a cable clamp as shown in the figure below.
Power supply terminal
Ring terminal (M5)
Transmission terminal (M3)
Cable tie (accessory)
Conduit (Power supply cable)
Transmission cable
Cable tie
(accessory)
Conduit
Earth
(ground)
cable
9/16 to 1 in
(15 to 25 mm)
5/16 to 3/8 in
(8~10 mm)
1 to 1-9/19 in
(25~40 mm)
Tightening torque
M3
screw
4.4 to 5.3 lbf·in
(0.5 to 0.6 N·m)
M5
screw
17.7 to 26.5 lbf·in
(2.0 to 3.0 N·m)
How to connect wiring to the terminal
Caution when wiring cable
(1) Use ring terminals with insulating sleeves as shown in the figure 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 specified 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 screw-
driver 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.
Strip 3/8 in
(10 mm)
Cable
Screw with spe-
cial washer
Ring terminal
Terminal block
Ring terminal
Sleeve
Screw with spe-
cial washer
Ring terminal
Cable
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