Constant Speed Primary Headered Chilled Water System
In a constant speed configuration, the appropriate number of pumps needed to supply the required chilled water flow are turned on. An optional bypass valve can be modulated to maintain the differential pressure setpoint. As the number of pumps changes, chilled water flow through the chillers and building changes.
Constant Speed Primary Dedicated Chilled Water System
In a constant speed dedicated chilled water configuration, the pumps are interlocked with the chiller to which they are piped. The bypass valve is available for dP control.