Notes For Electrical Wiring; Connection Diagrams - Fujitsu AOU45RLXFZ Installation Manual

The primary power supply capacity is for the air conditioner itself, and does not include
the concurrent use of other devices.
Do not use crossover power supply wiring for the outdoor unit.
If the electrical power is inadequate, contact your electric power company.
Install a breaker in a location that is not exposed to high temperatures.
If the temperature surrounding the breaker is too high, the amperage at which the
breaker cuts out may decrease.
We suggest installing ELCB [Earth Leakage Circuit Breaker] or follow local electrical
code.
This system uses an inverter, which means that when used with a ground fault breaker
you must use breakers that can handle harmonics such as a ELCB (30 mA or greater)
in order to prevent malfunctioning of ground fault device.
When the electrical switchboard is installed outdoors, place it under lock and key so
that it is not easily accessible.
Do not fasten the power supply cable and connection cable together.
Always keep to the maximum length of the connection cable. Exceeding the maximum
length may lead to erroneous operation.
The static electricity that is charged to the human body can damage the control PC
Board when handling the control PC Board for address setting, etc.
Please keep caution to the following points.
Provide the grounding of Indoor unit, Outdoor unit and Option equipment.
Cut off the power supply (breaker).
Touch the metal section (such as the unpainted control box section) of the indoor or
outdoor unit for more than 10 seconds. Discharge the static electricity in your body.
Never touch the component terminal or pattern on the PC Board.

6. 1. Notes for electrical wiring

• When stripping off the coating of a lead wire, always use a special tool such as a wire
stripper. If there is no special tool available, carefully strip the coating with a knife etc.
Earth wire
How to connect wiring to the terminal
Caution when wiring cable
(1) Use ring type terminals with insulating sleeves as shown in the fi gure to connect to
the terminal block.
(2) Securely clamp the ring type terminals to the wires using an appropriate tool so that
the wires do not come loose.
(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.
(6) See the table below for the terminal screw tightening torques.
Strip : 3/8 in. (10 mm)
Screw with special washer
Ring type terminal
Wire
Terminal blocks
Tightening torque [lbf·in. (N·m)]
M4 screw
M5 screw
En-11
CAUTION
Power supply cable
and connection cable
Ring type terminal
Sleeve
Screw with special washer
Ring type terminal
Wire
10.6 to 15.9 (1.2 to 1.8)
17.7 to 26.5 (2.0 to 3.0)

6. 2. Connection diagrams

45 type
INDOOR UNIT
INDOOR UNIT A
TERMINAL
1
2
3
DISCONNECT SWITCH
G
(Locally purchased)
INDOOR UNIT B
TERMINAL
1
2
3
DISCONNECT SWITCH
G
(Locally purchased)
INDOOR UNIT C
TERMINAL
1
2
3
DISCONNECT SWITCH
G
(Locally purchased)
INDOOR UNIT D
TERMINAL
1
2
3
DISCONNECT SWITCH
G
(Locally purchased)
INDOOR UNIT E
TERMINAL
1
2
3
DISCONNECT SWITCH
G
(Locally purchased)
36 type
INDOOR UNIT
INDOOR UNIT A
TERMINAL
1
2
3
G DISCONNECT SWITCH
(Locally purchased)
INDOOR UNIT B
TERMINAL
1
2
3
DISCONNECT SWITCH
G
(Locally purchased)
INDOOR UNIT C
TERMINAL
1
2
3
DISCONNECT SWITCH
G
(Locally purchased)
INDOOR UNIT D
TERMINAL
1
2
3
G DISCONNECT SWITCH
(Locally purchased)
OUTDOOR UNIT
(Inter-unit)
TERMINAL
Power lines
UNIT A
208/230 V
1
208/230 V
2
208/230 V
3
Grounding
line
G
UNIT B
208/230 V
1
208/230 V
2
208/230 V
3
Grounding
line
G
UNIT C
208/230 V
1
208/230 V
2
208/230 V
3
Grounding
line
G
UNIT D
208/230 V
1
208/230 V
2
208/230 V
3
Grounding
line
G
UNIT E
208/230 V
1
208/230 V
2
208/230 V
3
Grounding
line
G
L1
L2
G
OUTDOOR UNIT
(Inter-unit) TERMINAL
Power lines
UNIT A
208/230 V
1
208/230 V
2
208/230 V
3
Grounding
line
G
UNIT B
208/230 V
1
208/230 V
2
208/230 V
3
Grounding
line
G
UNIT C
208/230 V
1
208/230 V
2
208/230 V
3
Grounding
line
G
UNIT D
208/230 V
1
208/230 V
2
208/230 V
3
Grounding
line
G
L1
L2
G