Knockout Hole; Selecting Power Supply Cable And Breaker; Transmission Line - Fujitsu AirStage AJYA72GALH Installation Manual

6. 3.

Knockout hole

Seal the wiring route hole with putty (fi eld supply) such that there are no gaps.
Small insects or animals that are trapped in the outdoor unit may cause a short circuit
in the electrical component box.
Be careful not to deform or scratch the panel while opening the knockout holes.
After opening the knockout hole, remove the burr on the edges to prevent snapping
of cables.
It is recommended to apply rust proof paint on the edges to prevent rust.
Electric wires can be connected from the front or from the left.
(Knockout holes are prepared so that wiring can be made from 2 different directions.)
Use the knockout holes on the front and the left separately when necessary.
< Left view >
Ø 50
Ø 34.5
Ø 43.7
Ø 22.2
6. 4.

Selecting power supply cable and breaker

Obtain the distribution network operator's agreement about the power capacity of
the power supply system, specifi cation of the cable and the harmonic current, and
etc. when you connect the outdoor unit with the power supply.
Regulation of wire size and circuit breaker differs from each locality, please refer in
accordance with local rules.
Refer to the table for the wiring and breaker specifi cations of each installation condition.
(1) Selecting power supply cable and breaker when connecting 1 outdoor unit
Breaker (Time delay fuse or circuit capacity)
MODEL
Fuse capacity (A)
AJ A72GALH
AJ A90GALH
AJ 108GALH
MODEL
Power supply
cable (mm
AJ A72GALH 4
AJ A90GALH 6
AJ 108GALH 6
1) These values are recommended data.
2) Specifi cation: Use conformed cord with Type 60245 IEC66
3) Max. wire length: Set a length so that the voltage drop is less than 2%. Increase
the wire diameter when the wire length is long.
En-13
CAUTION
< Front view >
Ø 50
Ø 34.5
Ø 22.2
Ø 43.7
(Unit: mm)
CAUTION
Leakage current
20
100mA
25
0.1sec or less
25
Outdoor unit power supply cable
Critical wiring
2
Ground wire (mm )
2
) length (m)
4
6
6
Fig. In case of connected outdoor unit
Good
400 V 3ø 50 Hz
Breaker
Outdoor unit
power supply cable
(2) Selecting main breaker and main power supply cable when connecting multiple
outdoor units
Main breaker: Main breaker ≥ Total Sub breaker (Refer to the table in item (1) for the
sub breaker capacity)
Fig. In case of connected 3 outdoor unit
Good
Main
breaker
400 V 3ø
50 Hz
(3) Example of bad breaker wiring
Breaker
Prohibited: install a breaker
for each outdoor unit
6. 5.

Transmission line

• Caution when wiring cable
When stripping off the coating of lead wire, always use the exclusive tool such as
a wire stripper. If there is no exclusive tool available necessarily, carefully strip the
coating by a cutter etc. so that the conductive wire is not damaged.
If it is damaged, it may lead to an open circuit and a communication error.
• Pay attention to the following points while attaching wires on the terminal board.
Do not attach 2 wires on one side.
Do not twist wires.
51
Do not cross the wires.
62
Do not shorted at edge at root.
62 2pcs at one side
Prohibited
Shorted at edge
Prohibited
Transmission cable
230 V 1ø 50 Hz
230 v 1ø 50 Hz
Remote controller cable
Sub
breaker
Outdoor unit power supply cable
Prohibited
400 V 3ø
50 Hz
Outdoor unit
Power supply cable
Prohibited: crossover power
supply wiring prohibited
CAUTION
Wires twisted
Prohibited
Shorted at root
Prohibited
RB unit
power supply
cable
Breaker
Indoor unit
power supply
cable
1 wire
Good
2 wires
Good