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requested to start. After the second chiller is started and is running, the lead chiller shall monitor conditions and evaluate whether the capacity has reduced enough for the lead chiller to sustain the system alone. If the capacity is reduced enough for the lead chiller to sustain the CONTROL POINT temperatures alone, then the operating lag chiller is stopped.
If the lead chiller is stopped in CCN mode for any reason other than an alarm (*) condition, then the lag and standby chillers are stopped. If the configured lead chiller stops for and alarm condition, then the configured lag chiller takes the lead chiller’s place as the lead chiller and the standby chiller serves as the lag chiller.
If the configured lead chiller does not complete the
If the lag chiller does not achieve