En-6
Wrench (fi xed)
Connection pipe
Flare nut
Indoor unit pipe
Tighten with two wrenches.
Torque wrench
Flare nut [mm (in.)] Tightening torque [N·m (kgf·cm)]
6.35 (1/4) dia. 16 to 18 (160 to 180)
9.52 (3/8) dia. 32 to 42 (320 to 420)
12.70 (1/2) dia. 49 to 61 (490 to 610)
15.88 (5/8) dia. 63 to 75 (630 to 750)
19.05 (3/4) dia. 90 to 110 (900 to 1,100)
7. ELECTRICAL WIRING
Cable Cable size (mm
2
) Type Remarks
Connection cable 1.5 Type 60245 IEC57
3Cable+Earth (Ground),
1φ 230 V
Max. Cable Length: Limit voltage drop to less than 2%. Increase cable gauge if voltage drop is
2% or more.
]1
7.1. Wiring system diagram
INDOOR UNIT
TERMINAL
Please connect it to
the specifi ed terminal.
Power line
Control line
Earthing (Grounding) line
Type 60245 IEC57
Cable size 1.5mm
2
(Inter-unit)
Power lines
OUTDOOR UNIT
or BRANCH BOX
CAUTION
Every wire must be connected fi rmly.
No wire should be allowed to touch refrigerant tubing, the compressor or any moving
part.
Loose wiring may cause the terminal to overheat or result in unit malfunction. A fi re
hazard may also exist. Therefore, be sure all wiring is tightly connected.
Connect wires to the matching numbers of terminals.
]1
7.2. Indoor unit wiring
(1) Remove the terminal cover.
(2) Remove the wire clamp.
(3) Bend the end of the connection wire as shown in the fi gure.
(4) Connect the end of the connection wire fully into the terminal block.
(5) Fasten the connection wire with a wire clamp.
Connection
cable
Cable
clamp
40 mm
20 mm
Wire clamp
Unit: mm
Terminal cover
Earth (Ground) wire
]1
7.3. How to connect wiring to the terminals
Caution when wiring cable
When stripping off the insulation of a lead wire, always use a special tool such as a wire
stripper. If there is no special tool available, carefully strip the insulation with a knife etc.
(1) Use crimp-type terminals with insulating sleeves as shown in the figure below to
connect to the terminal block.
(2) Securely clamp the crimp-type terminals to the wires using an appropriate tool so that
the wires do not come loose.
Strip : 10 mm
Sleeve
Crimp-type
terminal
(3) Use the specifi 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.
Screw with special washer
Screw with
special washer
Crimp-type terminal
Terminal blocks
Crimp-type
terminal
Wire
Wire
(6) See the table below for the terminal screw tightening torques.
Tightening torque [N·m (kgf·cm)]
M4 screw 1.2 to 1.8 (12 to 18)
CAUTION
Match the terminal block numbers and connection cable colors with those of the
outdoor unit or branch box.
Erroneous wiring may cause burning of the electric parts.
Connect the connection cables fi rmly to the terminal block. Imperfect installation may
cause a fi re.
Always fasten the outside covering of the connection cable with the cable clamp. (If
the insulator is chafed, electric discharge may occur.)
Always connect the earth (ground) wire.
Do not use the earth (ground) screw of the indoor unit for the connection other than a
specifi ed outdoor unit or branch box.
]1]1
8. FINISHING
(1) Insulate between pipes.
• Overlap the connection pipe heat insulation and indoor unit pipe heat insulation.
• Wrapping the connection pipe with cloth tape over the range within which they fi t into
the rear piping housing section.
• Fasten the pipe bracket with the screw.
(2) Fill the gap between the outside wall pipe hole and the pipe with sealer so that rain
water and wind cannot blow in.
(3) Fasten the drain hose to the outside wall, etc.
Cloth
tape
Right side of
pipe bracket
Wrap the each pipe
with cloth tape
Pipe
bracket
Screw
Wire
Left piping For connection from the left rear
Connection wire
Drain hose
Pipe
Wall pipe
Connection wire
Drain hose
Connection
pipe
9378533028-03_IM.indb 69378533028-03_IM.indb 6 2011-10-08 11:08:522011-10-08 11:08:52
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