We already bought the step-down transformers from 380V 3ph to 240V 3ph for activating the steam generator (SM-12).
By looking into the enclosed wiring diagram of steam generator, it appears that no neutral wiring is required for connection to it.
For electrical safety concern, there’s usually a neutral wire connection in HK/Macau either for 1ph or 3ph circuit.
Can you help to check with manufacturer if this wiring diagram is correct (i.e. no need to connect neutral wiring)? Thanks.