En-7
7.3. How to connect wiring to the terminals
Caution when wiring cable
To strip off the insulation of a lead wire, always use a special tool such as a wire strip-
per. If there is no special tool, carefully strip off the insulation by using a knife or other
utensil.
(1) Use ring terminals with insulating sleeves as shown in the fi gure to connect to the
terminal block.
(2) Securely clamp the ring terminals to the wires by using an appropriate tool so that
the wires do not come loose.
Strip : 10 mm
Ring terminal
Sleeve
(3) Connect specifi ed wires securely, and fasten them so that there is no stress applied
on the terminals.
(4) Use a screwdriver with an appropriate bit size to tighten the terminal screws. Using of
screwdriver with inappropriate bit size will damage the screw heads, and the screws
will not be tightened properly.
(5) Do not overtighten the terminal screws. Otherwise, the screws may break.
Screw with special washer
Wire
Ring terminal
Terminal blocks
Wire
Screw with special washer
Ring terminal
(6) See the table for the terminal screw tightening torques.
Tightening torque [N·m ]
M4 screw 1.2 to 1.8
CAUTION
• Match the terminal block numbers and connection cable colors with those of the
outdoor unit. Incorrect wiring may cause a fi re.
• Connect the connection cables fi rmly to the terminal block. Imperfect installation may
cause a fi re.
• When fi xing the connection cable with the cable clamp, always fasten the cable at the
plastic jacket portion, but not at the insulator portion. If the insulator is chafed, electric
leakage may occur.
• Always connect the earth (ground) wire. Improper earthing (grounding) work can
cause electric shocks.
• Do not use the earth (ground) screw for the indoor unit to the outdoor unit unless it is
specifi ed.
7. ELECTRICAL WIRING
CAUTION
Be careful not to generate a spark as follows for using a fl ammable refrigerant.
• Do not remove the fuse while the power is on.
• Do not disconnect the wiring while the power is on.
• It is recommended to position the outlet connection in a high position. Place the
cords so that they do not get tangled.
7.1.
Wiring system diagram
WARNING
• Before connecting the wires, make sure the power supply is OFF.
• Every wire must be connected fi rmly.
• No wire should be allowed to touch refrigerant tubing, the compressor, or any mov-
ing 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.
Earth (Ground) line
OUTDOOR UNIT
Please connect to
specifi ed terminal.
INDOOR UNIT
TERMINAL
Power line
Control line
7.2.
Indoor unit wiring
1. Remove the wire cover. (Remove 1 screw.)
2. Remove the cable clamp.
3. Ring terminals connect to the connection cable.
4. Connect the ring terminals fully into the terminal block.
5. Fasten the connection cable with a cable clamp.
Wire cover
Wire cover
Screw
Screw
Screw
Screw
Earth (Ground) wire
Insert the wire cover tab into the square hole
of the indoor unit and fasten with a screw.
Connection cable
60 mm
40 mm
Cable clamp
Cable clamp
9333005201_IM_En_ASTG09KMCA.indd 79333005201_IM_En_ASTG09KMCA.indd 7 2017/1/20 11:43:052017/1/20 11:43:05
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