En-9
3. 8. 2. Connection cable preparation
■
Connection cable
Earth (ground)
wire
Conduit connector
Keep the earth (ground) wire longer than the other wires.
■
Remote controller cable
For 2-wire type
1-3/16 in (30 mm)
3. 8. 3. How to connect wiring to the terminals.
(1) Use ring terminals with insulating sleeves as shown in the
fi
gure below to connect to
the terminal block.
(2) Securely crimp the ring terminals to the wires using an appropriate tool so that the
wires do not come loose.
Strip 3/8 in (10 mm)
Ring terminal
Sleeve
(3) Use the speci
fi
ed 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.
(6) See the table below for the terminal screw tightening torques.
WARNING
Use ring terminals and tighten the terminal screws to the speci
fi
ed torques, otherwise,
abnormal overheating may be produced and possibly cause serious damage inside the
unit.
Tightening torque [lbf·in (N·m)]
M4 screw
11 to 16 (1.2 to 1.8)
Screw with
special washer
Ring
terminal
Terminal blocks
Wire
Wire
Screw with
special
washer
Ring
terminal
3. 8. 4. Connection wiring
CAUTION
• Be careful not to mistake the power supply cable and connection wires when install-
ing.
• Install so that the wires for the remote controller will not come in contact with other
connection wires.
(1) Remove the control box cover and install each connection wire.
Control box cover
Loosen the screws. (3 locations)
Conduit connector
(Locally purchased)
Lock nut
(Locally purchased)
Attach the conduit connector on the wiring connecting port.
(The grommet edging and the connection cable clamp are
not used.)
■
Connection cable
Control line
Conduit
connector
Power line
Outdoor
unit
Earth (ground)
■
Remote controller cable
2-wire type
White
Red
Remote
controller
cable
Remote controller
*Earth (Ground) the remote controller if it has a earth (ground) wire.
(2) After wiring is complete, secure the remote controller cable and connection cable
with the wire clamper or cable tie.
Connection cable
(to outdoor unit)
Remote controller cable
Cable tie (medium)
(Accessory)
Control box
Wire clamper
(3) Seal the cable outlet or other gaps with putty to prevent dew condensation or insect
from entering the electric control box.
(4) Replace the control box cover.
CAUTION
• Do not bundle the remote controller cable, or wire the remote controller cable in par-
allel, with the indoor unit connection wire (to the outdoor unit) and the power supply
cable. It may cause erroneous operation.
• Tighten the indoor unit connection wire and power supply indoor and outdoor unit,
terminal board connections
fi
rmly with the terminal board screws. Faulty connection
may cause a
fi
re.
• Connect the indoor unit connection wire by matching the numbers of the outdoor and
indoor units terminal board numbers as shown in terminal label.
• Be sure to refer to the connection diagram for the correct
fi
eld wiring. Wrong wiring
causes malfunction of the unit.
(5) Fix the conduit with the supporters as shown below.
Conduit (Power supply cable)
Indoor unit
Supporter
30 in
(756 mm)
or less
54 in
(1,361 mm)
or less
54 in
(1,361 mm)
or less
54 in
(1,361 mm)
or less
3. 9. Remote controller installation
To install and set the remote controller, refer to the installation manual of the remote
controller (wired type).
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