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
- Input sensor(s) faulty or miscalibration. Verify input sensor(s) operation.
- Automatic control has been overridden. Revert equipment back to automatic control.
- Issue with control loop. Review and modify controller tuning parameters.
- 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
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.
