Return air damper is consistently at 100%

Objective/Method/Outcome

Objective: Determines if the return air damper is consistently 100% open during operational hours.

Method: Compares the return air damper command to the error threshold to find the hours during which the value is open at 100%. This is compared to the hours of operation to determine if the damper is consistently at full capacity and find the avoidable cost of running the system at 100%.

Outcome: The rule triggers an insight and calculates potential savings.

Description

Damper control: Check for RAD dampers constantly at 100%.

This rule is part of the CopperTree Standard rule-set.

Default Priority

Medium

Diagnosis

  1. Damper could be manually overridden.
  2. Damper could be stuck open.

Message

Return air damper has consistently been 100% open for more than 95% of the total weekly active hours. Please review damper operation.

Rule Template

Insight Type: Fault Detection

Trigger Type: Active High

Logic

Logic used to determine if RAD is constantly at 100%

Inputs

Input Unit Tags Description
AHU Status Discharge Air Fan Status, Discharge Air Fan Command The recorded status of the air handling unit
Damper Position Return Air Damper Command, Return Air Damper Position The recorded damper position of the air handling unit