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How to connect wiring to the terminal
Caution when wiring cable
When stripping off the coating of a lead wire, always use a special tool such as a wire
stripper. If there is no special tool available, carefully strip the coating with a knife etc.
(1) Use ring terminals with insulating sleeves as shown in the figure below to connect
to the terminal block.
(2) Securely clamp the ring terminals to the wires using an appropriate tool so that the
wires do not come loose.
Sleeve
Strip : 3/32 in.
(10 mm)
Ring terminal
(3) Use the specified wires, 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.
Wire
Screw with special washer
Ring terminal
Terminal blocks
Screw with
special washer
Wire
Ring terminal
(6) See the table below for the terminal screw tightening torques.
Tightening torque [lbf·in. (N·m)]
M4 screw
11 to 16 (1.2 to 1.8)
M5 screw
17 to 25 (2.0 to 3.0)
6.2. Knock out holes for wiring
CAUTION
Be careful not to deform or scratch the panel while opening the knock out holes.
When cables are routed from the unit, a protection sleeve for the conduits can be
inserted at the knock out hole.
If you do not use a wire conduit, be sure to protect the wires to prevent the edge of the
knock out hole from cutting the wires.
It is recommended to apply anti-rust paint to the edge of the knock out hole.
•
Knock out holes are provided for wiring. (Fig. A)
•
Knock out holes are provided 2 each in the same size in front, lateral and rear sides.
(Fig. B)
Fig. A
Service panel
Fig. B
Installation method of conduit plate
Please fix the conduit plate (accessory) as shown in the figure below.
Front connection
lock nut
Conduit plate
Cable (with conduit)
Lateral connection
Rear connection
Note : Please ensure that the power cable and interconnecting cables are not installed
through the same cable bush hole opening. They must be installed into the two
separate hole openings to prevent damage to the cable.
6.3. Wiring method
6.3.1. Connection diagrams
POWER SUPPLY
Indoor unit
side terminal
Outdoor unit
side terminal
L2
L1
3
3
2
2
1
1
EARTH
(GROUND)
EARTH
(GROUND)
EARTH
(GROUND)
Earthing (Grounding) line
Power line
Control line
6.3.2. Connection cable preparation
Keep the earth (ground) wire longer than the other wires.
Earth (Ground) wire
1-3/16 in.
(30 mm)
Power supply cable or
Transmission cable
1-3/8 in. (35mm)
or more
6.3.3. Wiring procedure
(1) Remove the service panel cover, insulation sheet and connect the wires to the
terminal in accordance with the terminal nameplate. (Fig. A, Fig. B)
Fig. A
Direction of the service
panel removal
Terminal blocks
Service panel
Inverter cover
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