Boiler command and status signals are mismatched

Objective/Method/Outcome

Objective: Determines if the boiler command and signal of the supply air fan are matching

Method: Compares the Command and Status to check if the command and status signals are active at the same time, to find out the hours of fault.

Outcome: Triggers an insight if the hours of fault are greater than the acceptable hours of fault.

Description

Compares the status and command signals to determine if there is a mismatch.

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 command-status signals do not match. Please investigate unit control.

Rule Template

Insight Type: Fault Detection

Trigger Type: Active High

Logic

Logic used to determine if supply fan command and status signals are mismatched

Inputs

Input Unit Tags Description
Command Boiler Command The recorded boiler command
Status Boiler Status The recorded boiler status
Acceptable Hours of Fault per Week The allowable hours of fault, beyond which an insight is triggered
Cost per Hour $ The cost of fault per hour
Days of operation annually The annual days of operation used to project annual savings