Objective/Method/Outcome
Objective: Determines if boiler is operational when the temperature of OAT is above the lockout temperature
Method: Checks the boiler is enabled, and determines the moving average of OAT. If the Boiler is enabled when the 4 hour moving average of the system is above the Boiler enable setpoint, an insight is triggered and the potential savings is projected by calculating the hours of fault and the cost of fault per hour.
Outcome: Triggers an insight, calculates the potential savings and the weekly energy impact.
Description
Determines if the boiler is operating when the heating plant may not be required, while OAT is above lockout temperature. Potential Savings can be calculated by modifying the “Cost per Hour of Operation” input.
This rule is part of the CopperTree Standard rule-set.
Default Priority
Medium
Diagnosis
- Boiler plant operating above OAT lockout. Verify heating plant sequence of operation.
- Automatic control has been overridden. Revert equipment back to automatic control.
Message
The boiler has been operating while the OAT is above its lockout temperature. Ensure that boiler enable is not overridden, then verify sequence of operation.
Rule Template
Insight Type: Fault Detection
Trigger Type: Active High
Logic
Inputs
| Input | Unit | Tags | Description |
|---|---|---|---|
| Boiler Enable | Boiler Command, Boiler Status | The recorded status of the boiler | |
| Threshold – PotentialSavings Yearly | $ | The minimum potential savings per year that can trigger an insight | |
| Outdoor Air Temp | ° | Outdoor Air Temperature | The recorded outdoor air temperature |
| Estimated Weeks Of Boiler Operation | The estimated weeks the boiler is operational per year | ||
| Boiler Enable OAT Setpoint | °C/°F | The OAT that enables the boiler | |
| Threshold – Weekly Energy Impact | % | The minimum percentage of fault that can trigger an Energy Impact | |
| Cost per Hour of Operation | $ | The cost of fault per hour | |
| Threshold – Weekly Hours of Faulty Operation | Hr | The minimum weekly faulty hours of operation that can trigger an insight |
Notes
Default Values:
- Threshold – Hours of Faulty Operation: 4
- Boiler Enable OAT Setpoint: 65 °F or 18 °C
- Estimated Weeks Of Boiler Operation: 26
- Cost per Hour of Operation [$]: 0
