Objective/ Method/Outcome
Objective: Determines if the Outdoor Air Damper is turning on and off more than the threshold
Method: Uses the Damper Status trend log to determine if the damper is on or off. Counts the daily cycles of on and off and triggers an insight if the on-off cycles are greater than the threshold
Outcome: An insight is triggered.
Description
This rule analyzes damper status changes using Analog or Binary trend log, triggering an insight when daily cycles exceeds a threshold.
This rule is part of the CopperTree Standard rule-set. (Aliased Celsius / Aliased Fahrenheit)
Default Priority
Medium
Diagnosis
Check and revise programming and sequence of operation to prevent unnecessary equipment cycling.
Message
Outdoor air damper is cycling more than expected
Rule Template
Insight Type: Fault Detection
Trigger Type: Active High
Notes
Default Values:
Const. – Analog Cycle Delta: 1
Const. – PropertyImpact Weekly: 14
Const. – UrgencyScore WeeklyMax: 30
Const. – Daily Cycles: 20
Const. – Cost to Replace Equipment [$]: 2000
Const. – Annual Days of Operation: 365
Const. – Expected Equipment Lifetime [Years]: 10
Support Site Link:
CTLs:
OAD Cycling – Property Impact
OAD Cycling – Urgency Score
OAD Cycling – Daily Status Changes
OAD Cycling – Weekly Status Changes (KPI)
OAD Cycling – Status Changes (CUSUM)
OAD Cycling – Avoidable Cost [$]
OAD Cycling – Potential Savings [$/year]
