Heating is active when zone temperature is above setpoint

Objective/Method/Outcome

Objective: Determines if heating is active when zone temperature is above the setpoint.

Method: Checks if the zone heating is active by verifying the recorded heating status and determines if the zone temperature is above setpoint by comparing the recorded zone temperature to the predetermined ideal temperature for the zone.

Outcome: Triggers an insight if heating is active when zone temperature is above setpoint.

Description

Determines if heating is active when zone temperature is above setpoint + 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

  1. Review temperature sensor calibration.
  2. Review program logic.

Message

Heating has been active while zone temperature is above setpoint.

Rule Template

Insight Type: Fault Detection

Trigger Type: Active High

Logic

Logic for determining heating is active when zone temperature is above setpoint

Inputs

Input Unit Tags Description
Heating Status   Room Heating Command, Discharge Air Heating Command The recorded heating status
Room Temperature   Room Temperature The recorded room temperature
Const. – Acceptable Weekly Threshold hr    The weekly acceptable time of fault, beyond which an insight is triggered
Room Temperature Setpoint   Room Active Heating Setpoint, Room Heating Setpoint The ideal room temperature
Cost per Hour  $   The cost of fault per hour
Days of operation annually     The estimated days the unit is operation to project potential savings
Setpoint Deadband °   The acceptable deviation from setpoint

Notes

Default Thresholds:

  • Setpoint Deadband: 1.5°
  • Days of operation annually (to project potential savings): 185
  • Acceptable Weekly Threshold [hrs]: 2
  • Cost per Hour [$]: 0