Selecting Power Supply Cable And Breaker - Fujitsu AJ*A72LALH Series Installation Manual

6. 3.

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
AJ A72LALH
AJ A90LALH
AJ 108LALH
AJ 126LALH
AJ 144LALH
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%.
Fig. In case of connected outdoor unit (breaker: earth leakage breaker)
OK
400 V 3ø 50 Hz
Breaker
(2) Selecting main breaker and main pow
Main breaker: Main breaker
Fig. In case of connected 3 outdoor unit (breaker: earth leakage breaker)
OK
Main breaker
400 V 3ø
50 Hz
(3) Example of bad breaker wiring
No Good
Breaker
No Good: install a breaker
for each outdoor unit
En-20
Capacity (A)
30
30
50
0.1sec or less
50
50
Transmission cable
Outdoor unit
Power supply cable
er supply cable when connecting multiple outdoor units
> = Total Sub breaker (
Transmission cable
Sub
breaker
Outdoor unit Power supply cable
Transmission cable
400 V 3ø 50 Hz
Outdoor unit
Power supply cable
No Good: crossover power
supply wiring prohibited
CAUTION
Leakage Power supply
current cable (mm
100mA
10
10
10
Increase the wire diameter when the wire length is long.
230 V 1ø 50 Hz
Remote controller cable
Refer to the table in item (1) for the sub breaker capacity)
230 V 1ø 50 Hz
230 V 1ø 50 Hz
Outdoor unit power supply cable
Ground wire (mm
2
)
4 4
4 4
6
6
6
Indoor unit
Power supply cable
Breaker
Indoor unit
Power supply cable
Breaker
Remote controller cable
Indoor unit
Power supply cable
Breaker
Remote controller cable
Critical wiring
2
)
length (m)
30
30
42
42
42