Outdoor air damper is consistently at 100%

Objective/Method/Outcome

Objective: Determines if the Outdoor Air damper is consistently 100% open during operational hours.

Method: Compares the Outdoor Air 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 OAD 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

Outdoor 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 for determining if the damper 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 status
Damper Position Outdoor Air Damper Command, Outdoor Air Damper Position The recorded position of the damper