Control Board Site Connection Diagram - LG RCWFL Series Installation Manual

9-3. Control Board Site Connection Diagram

Control Board Power Supply
The control board should be supplied with the 3 phase 3wire power. (Including ground wire)
1. The nominal voltage is 220/380/440VAC, 60/50Hz and allowed range is ±10% of them.
This may change depending on the power environment of the consumer.
2. Power capacity: Require higher than 4kVA.
3. Be cautious of connection R, S and T.
4. The cable size of 6SQ or higher is recommended.
5. Make sure to provide the ground line.
Consumer Interlock Contact
The Cold water/coolant pump interlock contact must be connected to prevent freeze.
It should be provided as the zero voltage contact. Otherwise, this may cause serious problems of the Centrifugal
Chiller. Therefore, make sure to connect for the safety.
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