En-11
Wiring method
6. 5.
Connection diagrams
6. 5. 1.
Breaker : (1) Earth leakage circuit breaker
(2) Current breaker (over current)
To other refrigerant circuit Outdoor unit
Power supply
Outdoor unit
Breaker
Indoor unit
Indoor unit
Indoor unit
Power supply
Remote control
Transmission
Transmission
Remote
controller
Transmission
Power supply
Power supply
Power supply
Power supply
Power supply
Remote control
Remote control
Transmission
Breaker
Breaker
Breaker
Remote
controller
Remote
controller
*1: The number of power supply terminals is
different depending on the indoor unit model.
For the wiring, refer to the indoor unit installa-
tion manual.
*2: Ground the remote controller if it has a ground
cable.
*1
*1
*2
*2
*2
*1
The wiring example for outdoor and indoor units is shown in
fi
gure.
Wiring procedure
6. 5. 2.
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 speci
fi
ed cable type and connect the cable securely.
•
Secure with a cable clamp as shown in the
fi
gure below.
How to connect wiring to the terminal
Caution when wiring cable
(1)
Use crimp-type terminals with insulating sleeves as shown in
the
fi
gure to connect to the terminal block.
(2)
Securely clamp the crimp-type 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 below for the terminal screw tightening torques.
Sleeve
Strip : 10mm
Crimp-type
terminal
Cable
Screw with special washer
Crimp-type terminal
Terminal blocks
Screw with
special washer
Cable
Crimp-type
terminal
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 tie
Cable clamp
earth cable
Cable tie
(accessory)
Transmission cable
8~1
0 mm
45~50mm
25~30mm
25~40mm
about 550mm
about 520mm
Sealing transmission cable
Connect both ends of the sealed wires 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.
Be sure to use one side of a twisted-pair cable when using transmission cable with 2 sets
of twisted-pair cables.
Wind with insulation tape to prevent short circuit
Use one side of the
twisted-pair cable
Connect both ends of sealed cable to earth.
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