Design Technical Manual

Table Of Contents
POWER SUPPLY CABLE WIRING
z
Example : Power supply cable wiring.
(Using terminal board for indoor unit & RB unit)
CAUTION
Except for EMERGENCY, never turn off main as well as sub breaker of the indoor units during
operation. It will cause compressor failure as well as water leakage.
First, stop the indoor unit by operating the control unit, convertor or external input device and then
cut the breaker.
Make sure to operate through the control unit, convertor or external input device.
When the breaker is designed, locate it at a place where the users cannot start and stop in the
daily work.
Regulation of wire size and circuit breaker differs from each locality, refer in accordance with the
regional standard.
When approved for use in local code, we suggest installing Ground Fault Equipment Breaker
(GFEB). In that case, GFEB shall be per Fujitsu recommended capacity in order to prevent
malfunction of breaker device.
50A
50A
AOUA72
Outdoor units
AOUA72AOUA96
Outdoor unit power supply
3ø 3W 60Hz 208/230V
Sub Breaker
Sub Breaker
Sub Breaker
50A
Power cable
Power cable
Power cable
Sub Breaker
Terminal board
Terminal board
Sub Breaker
15A
15A
Indoor unit power supply
1ø 60Hz 208/230V
Power cable
Indoor
units
Indoor
units
Connected within refrigerant
system. Total MCA ≤ 11 (A).
+
Maximum connectable indoor
unit (Ground Fault Equipment
Breaker requirements)*
- (06 - 93) -
SYSTEM
DESIGN
SYSTEM
DESIGN