Supply air pressure control requires tuning

Objective/Method/Outcome

Objective: Determines if supply air pressure control needs calibration or adjustment

Method: Compare the Supply Static Pressure to the Supply Static Pressure Setpoint to determine if the pressure is over the minimum threshold to enable the rule and determine the cost of fault per day and project potential savings.

Outcome: Triggers an integrity KPI, and calculates the Potential Savings.

Description

Determines if pressure control requires tuning by comparing pressure to setpoint during active hours.

This rule is part of the CopperTree Standard ruleset.

Default Priority

Medium

Diagnosis

  1. Input sensor(s) faulty or miscalibration. Verify input sensor(s) operation.
  2. Automatic control has been overridden. Revert equipment back to automatic control.
  3. Issue with control loop. Review and modify controller tuning parameters.
  4. Primary air not available. Verify Air Handling Unit operation.

Message

SSP deviates more than 15% from its setpoint for longer than the specified threshold.

Rule Template

Insight Type: Integrity KPI

Trigger Type: Active High

Logic

Logic for determining Supply air Pressure control requires tuning

Inputs

Input Unit Tags Description
Supply Static Pressure   Discharge Air Static Pressure The recorded the supply static pressure
Supply Static Pressure Setpoint   Discharge Air Static Pressure Setpoint  
System Active   Room Occupied, Discharge Air Fan Status, Discharge Air Fan Command  
Acceptable Time Outside Range per Week Hr   The acceptable amount of time
Cost per Hour $   The cost of the fault per hour
Days of operation annually      The days per year the system is active

Notes

The rule is disabled if the SSP is less than 50% of its setpoint in order to prevent misleading scores.