Is control of chiller capacity included with speed control in OptimumHVAC operation?
Yes. Currently, a DDC controller is configured and programmed to operate chillers in an OptimumHVAC plant just as DDC controllers typically operate chillers in a conventional plant. Thus, the operation of variable speed chillers in OptimumHVAC chiller plants is very similar to the operation of conventional plants. OptimumHVAC controls both chiller sequencing (on/off control) as well as the amount of capacity (demand limit) of each chiller. All factory built variable speed chillers include internal logic that is intended to continuously optimize vane and speed control to meet current conditions and variable speed chillers can also be configured to accept “demand” commands from the OptimumHVAC plant controller. Thus it is not difficult to establish OptimumHVAC plant operations with any variable speed chillers. In plants that are retrofit from constant speed chillers, the speed/vane control logic may be externally applied.
