AHU: Air Handling Unit ADM: Air Distribution Module MCS: Micro Control Set FCB: Fan Control Board S1: Socket-1, white, 4P, ADM connect to FCB P1: Plug-1, white, 4P, ADM connect to FCB S2: Socket-2, red, 4P, FCB connect to MCS P2: Plug-2, red, 4P, FCB connect to MCS S3: Socket-3, black, 4P, FCB series connection P3: plug-3, black, 4P, FCB series connection BS: MCS built-in socket 250: 250 terminal, AC power in/out
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