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4.8 External Electrical Wiring Diagram
Each unit should be equipped with a circuit breaker for short circuit protection and
exceptional overload protection. Besides, a main circuit breaker shall be prepared for IDUs and
ODUs in order to connect or disconnect power of the entire system.
4.8.1 External wiring diagram of a single unit
Fig.59
NOTICE!
Maximum number of IDU is based upon ODU capacity. For details, please refer
to the introduction of units’ combination.
Power supply for the unit should comply with ratings at
the nameplate.
Lennox
VRF Unit
