Wiring System Diagram; Connection Cable Preparation; Connection Of Wiring - Fujitsu AU7 Installation Manual

Screw with
special washer
Ring terminal
Wire
Terminal
board
Terminal block
Tightening torque
M4 screw
Use ring terminals and tighten the terminal screws to the
specifi ed torques, otherwise, abnormal overheating may
be produced and possibly cause heavy damage inside the
unit.

7.1. Wiring system diagram

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.
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 specifi c wir-
ing instructions or limitations.
En-11
Ring terminal
Sleeve
Screw with
special washer
Ring
terminal
Wire
Table 1
11 to 16 lbf·in (1.2 to 1.8 N·m)
WARNING
WARNING
CAUTION
Connection cable to outdoor unit or BRANCH BOX
INDOOR UNIT SIDE
INDOOR
DISCONNECT
UNIT
SWITCH
TERMINAL (Locally purchased)
Wired remote controller cable
Indoor
unit side
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.
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
OUTDOOR UNIT
or BRANCH BOX
14AWG
(Inter-unit)
Power lines
Power line
Control line
Earth
(ground) line
Red
White
Black
Power supply cable
or connection cable
Control box cover