Fujitsu AIRSTAGE J-IIIL Design & Technical Manual page 574

¢ Wiring example
CAUTION
• Except for emergency, never turn off main as well as sub breaker of the indoor units during op-
eration. It will cause compressor failures as well as water leakage.
• First, stop the indoor unit by operating the control unit, converter, or external input device, and
then cut the breaker.
• Make sure to operate through the control unit, converter, 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 mal-
function of breaker device.
• Example 1: Using terminal board for indoor unit
Outdoor unit power supply
3Ø 3W 60Hz 208/230V
Indoor unit power supply
1Ø 60Hz 208/230V
Total Sub breaker ≤ Main breaker
4-2. Power supply cable
AOU72
Sub breaker
40A
Power cable
Sub breaker
40A
Power cable
Sub breaker
50A
Power cable
Sub breaker
15A
Terminal board
Terminal board
Sub breaker
15A
- (06-52) -
Outdoor unit
AOU96 AOU120
Connected within
refrigerant system
Total MCA ≤ 11 (A)
Maximum connectable
indoor unit (Ground
Fault Equipment
Breaker requirements)
Indoor
units
Power
cable
Indoor
units
+
4. Wiring design