Fujitsu AOTG36LATT, Service Manual

Page: 92 / 264

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 crimp-type ring terminals with insulating sleeves as shown in the figure to con -
nect to the terminal block.
(2) Securely clamp the crimp-type terminals to the wires by using an appropriate tool so
that the wires do not come loose.
Strip : 10 mm
Crimp-type
terminal
Sleeve
(3) Connect specified 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
Crimp-type terminal
Terminal blocks
Wire
Screw with special washer
Crimp-type
terminal
(6) See the table 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. Incorrect wiring may cause a fire.
• Connect the connection cables firmly to the terminal block. Imperfect installation may
cause a fire.
• When fixing 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
specified.
8. FINISHING
(1) Insulate between pipes.
• Insulate suction and discharge pipes separately.
• For rear, right, and bottom piping, overlap the connection pipe heat insulation and
indoor unit pipe heat insulation and bind them with vinyl tape so that there is no gap.
• For left and left rear piping, butt the connection pipe heat insulation and indoor unit
pipe heat insulation together and bind them with and vinyl tape so that there is no gap.
• For left and left rear piping, wrap the area which accommodates the rear piping
housing section with cloth tape.
• For left and left rear piping, bind the connection cable to the top of the pipe with
vinyl tape.
• For left and left rear piping, bundle the piping and drain hose together by wrapping
them with cloth tape over the range within which they fit into the rear piping
housing section.
(2) Temporarily fasten the connection cable along the connection pipe with vinyl tape.
(Wrap to about 1/3 the width of the tape from the bottom of the pipe so that water
does not enter.)
(3) Fasten the connection pipe to the outside wall with a saddle, etc.
(4) Fill the gap between the outside wall pipe hole and the pipe with sealer so that rain
water and wind cannot blow in.
(5) Fasten the drain hose to the outside wall, etc.
*Field supplied
Pipe
Saddle*
Outside wall cap*
Sealer putty*
(Outdoors)
Wall
Tightening nut [mm (in.)] Tightening torque [N·m]
6.35 (1/4) dia. 16 to 18
12.70 (1/2) dia. 49 to 61
Step.6 Confirm that the marking on the connection pipe is within 1mm from the
tightening nut.
1mm or less
Tightening nut
Conection pipe
Insert margin
marking.
more than 1mm
Tightening nut
Conection pipe
Insert margin
marking.
GOOD PROHIBITED
If the insert margin marking is more than 1mm away from the tightening nut, remove the
flare less joint nut assy, replace with a new flare less joint nut assy, and start work from 6.9.1.
Please refer to the Service Instruction to remove the flare less joint nut assy.
7. ELECTRICAL WIRING
CAUTION
Be careful not to generate a spark as follows for using a flammable 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 firmly.
• 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 fire
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 the
specified 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. Bend the end of the connection cable as shown in the figure.
4. Connect the end of the connection cable fully inserting into the terminal block.
5. Fasten the connection cable with a cable clamp.
Wire cover
Wire cover
Screw
Screw
Screw
Screw
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
ASTG18KMCA_中型標準モデルLM系_R32_0724m.indd 7 2013/07/24 16:52:01