The CHW Pump Differential Pressure Setpoint Reset module resets the chilled water pump differential pressure setpoint based on the zone loop differential pressure error from its setpoint. The module has inputs for the process variable, building chilled water loop differential pressure setpoint, stage up and stage down thresholds, period, startup value, and an enable. The module may operate in one of several modes which include Off, On, or Hold. This module has an output for the plant chilled water loop differential pressure setpoint. This module is implemented as a control activity.
Figure 1. CP-CHW Pump Differential Pressure Setpoint Reset