Objective/Method/Outcome
Objective: Determines if the cooling is active when the zone temperature is below the setpoint.
Method: Compares the recorded air temperature to the acceptable range of temperature, if it is below the threshold, while the cooling system is on, the cost per hour of the fault is used to project potential savings, and insight is triggered.
Outcome: Calculates the potential savings, and triggers an insight.
Description
Determines if cooling is active when zone temperature is below setpoint of 1°. Insight is triggered when this occurs for greater than 2 hours in a week.
This rule is part of the CopperTree Standard ruleset.
Default Priority
Medium
Diagnosis
Review sequence of operation and program logic.
Message
Review sequence of operation and program logic.
Rule Template
Insight Type: Fault Detection
Trigger Type: Active High
Logic
Inputs
| Input | Unit | Tags | Description |
|---|---|---|---|
| Cooling Status | Room Cooling Command, Discharge Air Cooling Command | The recorded room cooling system status | |
| Room Temperature | Room Temperature | The recorded room temperature | |
| Const. – Acceptable Weekly Threshold | Hrs | The weekly acceptable hours of room cooling system operating while recorded temperature is below setpoint. | |
| Room Temperature Setpoint | Room Active Cooling Setpoint, Room Cooling Setpoint | The ideal or predetermined room temperature | |
| Cost per hour | $ | The base cost of fault per hour | |
| Days of operation annually | The days the unit is operational to determine the annual cost of fault | ||
| Setpoint Deadband | ° | The acceptable variation from setpoint |
Notes
Default Thresholds:
- Setpoint Deadband: 1.5°
- Days of operation annually: 185
- Acceptable Weekly Threshold [hrs]: 2
- Cost per Hour [$]: 0
