Objective/ Method/Outcome
Objective: Determines if the boiler status and isolation valve status signals are matching.
Method: Compares the boiler status and isolation valve status signals to check if their activity matches and generates an insight when a mismatch occurs for greater than the defined daily threshold. Avoidable Costs and Potential savings are determined based on the hourly cost of faulty operation.
Outcome: This rule generates an insight.
Description
This rule determines if the isolation valve operation is in sync with the boiler status. This rule is part of the CopperTree Standard rule-set.
Default Priority
High
Diagnosis
1. Check if the equipment is manually overridden.
2. Check interfacing relays.
3. Check status sensors.
Message
Boiler status and isolation valve position are mismatched. Please investigate hot water system.
Rule Template
Insight Type: Fault Detection
Trigger Type: Active High
Inputs
| Input | Unit | Tags | Description |
| Boiler Status | Boiler Status, Boiler Command | ||
| Isolation Valve Status | Valve Command, Valve Status | ||
| Threshold – Daily Hours of Faulty Operation | Hours | The minimum hours of fault that can trigger an insight | |
| Weeks of Operation | The annual weeks of operation | ||
| Cost per Hour | $ | The defined hourly cost of faulty operation |
Notes
1. Expected values for “Boiler Status” inputs are “0” or “1”.
2. Expected values for “Isolation Valve Status” inputs are “0” or “1”.
Default Values:
Const. – Threshold – Daily Hours of Faulty Operation [Hours]: 2
Const. – Cost per Hour [$]: 0
Const. – Weeks of Operation: 26
