Health Compliance Package – Hot water valve consistently 100% open

Objective/Method/Outcome

Objective: Determines if the hot water valve is consistently 100% open during operational hours.

Method: Compares the hot water valve 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 valve 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.

Applicable System

DAF

Description

Monitor valve position TL and determine if the valve is constantly at 100%. Calculate the percentage of active hours that valve is at 100%.

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

Diagnosis

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

Message

Hot water valve is consistently 100% open.

Rule Template

Insight Type: Fault Detection

Trigger Type: Active High

Default Priority

Medium

Logic

Logic used to determine if the hot water valve is 100% open consistently

Inputs

InputUnitTagsDescription
EnabledDischarge Air Fan Status, Discharge Air Fan CommandThe recorded status of DAF
Acceptable Weekly Threshold%The maximum time the fan can be at 100% without triggering an insight
Valve Error Threshold%The acceptable error in the value of hot water valve command
Cost per hour $The cost of running the system
Days of operation annuallyThe number of days the unit is operational to project annual potential savings
HW ValveDischarge Air Heating CommandThe hot water valve command value