En-11
Strip 3/8 in. (10 mm)
Sleeve
Ring terminal
Screw with
special washer
Screw with
special washer
Ring terminal
Ring
terminal
Wire
Wire
Terminal block
Terminal
board
Table 1
Tightening torque
M4 screw
11 to 16 lbf·in (1.2 to 1.8 N·m)
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.
7.1. Wiring system diagram
WARNING
Disconnect switch for over current protection given
in the system diagram is to be installed between the
indoor unit and the outdoor unit, branch box.
CAUTION
Tighten the indoor unit connection cable and power
supply indoor and outdoor unit, branch box terminal
board connections
fi
rmly with the terminal board
screws. Faulty connection may cause a
fi
re.
If the indoor unit connection cable and power sup-
ply are wired incorrectly, the air conditioner may be
damaged.
Connect the indoor unit connection cable by match-
ing the numbers of the outdoor, branch box and
indoor units terminal board numbers as shown in
terminal label.
Earth (Ground) both the indoor, outdoor and branch
box units by attaching a earth (ground) cable.
Unit must be earthed (grounded) in compliance with
the applicable local and national cables.
Be sure to refer to the diagrams for do correct
fi
eld
wiring. Wrong wiring causes malfunction of the unit.
Check local electrical rules and also any speci
fi
c wir-
ing instructions or limitations.
Wired remote controller cable
Red
White
Black
Indoor
unit side
Connection cable to outdoor unit or BRANCH BOX
INDOOR UNIT SIDE
INDOOR
UNIT
OUTDOOR UNIT
or BRANCH BOX
TERMINAL
DISCONNECT
SWITCH
(Locally purchased)
Earth
(ground) line
14AWG
(Inter-unit)
Power lines
Power line
Control line
Remote controller line
Disconnect Switch - Locally purchased if required by local
code.
Select the correct capacity of disconnect switch according to
the load.
7.2. Connection cable preparation
Keep the earth (ground) wire longer than the other wires.
Power supply cable
or connection cable
13/16 in. (20 mm)
1-3/16 in. (30 mm) or more
Earth
(Ground)
wire
• Use a 4-core wire cable.
7.3. Connection of wiring
(1) Remove the control box cover and install each connec-
tion wire.
Screw
Control box cover
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