Design and Technical Manual

6. SYSTEM DESIGN
POWER SUPPLY CABLE WIRING

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 or external input device and then cut the ●
breaker.
Make sure to operate through the control unit 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, please refer in accordance ●
with local rules.
Example 1 (Outdoor unit)
z
Outdoor unit
Power supply
1ø 208/230 V 60 Hz
Earth leakage breaker
Outdoor unit
Circuit breaker (over current)
Example 2 (Branch box & indoor unit)
z
Earth leakage
breaker
Branch box
Indoor units
Branch box
Branch box
Earth leakage
breaker
Earth leakage
breaker
Circuit breaker
(over current)
Circuit breaker
(over current)
Circuit breaker
(over current)
Branch box - Indoor unit
Power supply
1ø 208/230 V 60 Hz
Branch box - Indoor unit
Power supply
1ø 208/230 V 60 Hz
Branch box - Indoor unit
Power supply
1ø 208/230 V 60 Hz
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SYSTEM DESIGN SYSTEM DESIGN