En-9
6.2. Wiring method
EXAMPLE
Outdoor unit or RB unit *1
Transmission
Transmission
Power supply
Breaker
Power supply
Remote controller
(Master)
*1: When connecting to the Heat Recovery System, refer to the installation manual of
the RB unit.
*2: Earth (Ground) the remote controller if it has a earth (ground) cable.
*3: When connecting the 2-wire type remote controller, Y3 is not used.
Remote controller
(Slave)
Remote controller
Breaker
Breaker
Indoor unit
Remote
control
*2
*2
*2
*3
*3
*3
Indoor unit
Indoor unit
(Crossover wiring of power supply)
Breaker
Indoor unit
Power supply
Pull box
Pull box
Power supply
Power supply
Power supply
Indoor unit
Indoor unit
* Earth (Ground) the remote controller if it has an earth (ground) wire.
Connect the earth (ground) wire of the remote controller to the earth (ground) terminal of
transmission.
6.3. Unit wiring
Before attaching the cable to terminal block.
6.3.1. Power supply cable
Adjust the length of power supply cable to avoid excessive tension with referring
fi
gure
below.
Earth (Ground)
cable
25 mm
30 mm
A. For solid core wiring
(1) To connect the electrical terminal, follow the below diagram and connect after
looping it around the end of the cable.
(2) Use the speci
fi
ed cables, connect them securely, and fasten them so that there is no
stress placed on the terminals.
(3) 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.
(4) Do not tighten the terminal screws too much, otherwise, the screws may break.
(5) See the table for the terminal screw tightening torques.
(6) Please do not
fi
x 2 power supply cables with 1 screw.
Strip 25 mm
Screw with
special washer
Terminal block
Cable end (Loop)
Cable end (Loop)
Loop
Screw with
special washer
Cable
Cable
WARNING
When using solid core cables, do not use the ring terminal. If you use the solid core
cables with the ring terminal, the ring terminal's pressure bonding may malfunction and
cause the cables to abnormally heat up.
B. For strand wiring
(1) Use ring terminals with insulating sleeves as shown in the
fi
gure below 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 speci
fi
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 for the terminal screw tightening torques.
(7) Please do not
fi
x 2 power supply cables with 1 screw.
Strip 10 mm
Ring terminal
Screw with
special washer
Ring terminal
Terminal block
Cable
Screw with
special washer
Sleeve
Ring terminal
Cable
WARNING
Use ring terminals and tighten the terminal screws to the speci
fi
ed torques, otherwise,
abnormal overheating may be produced and possibly cause heavy damage inside the
unit.
Tightening torque
M4 screw
(Power supply /L, N, GND)
1.2 to 1.8 N·m
(12 to 18 kgf·cm)
6.3.2. Transmission and Remote controller cable
25 mm
35 mm
Shielded cable (no
fi
lm)
Transmission cable
Remote controller cable
25 mm
25 mm
For 3-wire type
For 2-wire type
• Connect remote controller and transmission cables as shown in Fig. A.
Fig. A
GOOD
PROHIBITED
Different diameter
Connect to 1 side
WARNING
Tighten the terminal screws to the speci
fi
ed torques, otherwise, abnormal overheating
may be produced and possibly cause heavy damage inside the unit.
9373385141-01_IM.indb Sec1:9
9373385141-01_IM.indb Sec1:9
7/12/2012 11:16:12 AM
7/12/2012 11:16:12 AM
