This algorithm uses four inputs to determine if the pressure in a secondary chilled water pump is below the expected setpoint.
The conditions that must be met for this algorithm to return a value of true are:
- Secondary chilled water pump command is on.
- Secondary chilled water pump is on (feedback indicates the pump is running).
- Secondary chilled water pump speed is 60 Hz (100%).
- Secondary loop differential pressure is below 90% of the setpoint for more than 30 minutes.
Input ORD
There are two ORDs for both English and Metric folders for an algorithm based on speed in Hz and speed in percentage.
slot:/Algorithm/English/PumpNotMeetingSetpointslot:/Algorithm/English/PumpNotMeetingSetpoint_SpeedInPercentage
slot:/Algorithm/Metric/PumpNotMeetingSetpoint
slot:/Algorithm/Metric/PumpNotMeetingSetpoint_SpeedInPercentage
Wire sheet view
Figure 32. Pump pressure below setpoint wire sheet