VAV - Induced Heating

This workflow will test a VAV box for its heating operation.

First, we display the initial conditions of the equipment.
Then KODE performs precondition checks to ensure the equipment is ready to be tested
Next we will lower the setpoint to stop heating.
Finally we will raise the setpoint to start heating.

Outcome 🎯

This test will check a VAV box's ability to deliver heat when its setpoint is raised.

Recommended Schedule 📅

Device	Point Requirements 📌
VAV	Occupied Mode
	Discharge Air Temperature
	Zone Temperature
	Zone Temperature Setpoint
	Zone Temperature Setpoint
AHU	Discharge Air Pressure
Required Preconditions
1.	AHU Pressure > Min Pressure Threshold

*Variations

There is a variant of this workflow which works with occupied heating and cooling setpoints.
There is a variant of this workflow which works with network setpoint.

Workflow Overview

	Test Step	Workflow
1	Pre-condition Check	VAV is Occupied AHU Pressure > Min Pressure Threshold
2	Stop Heating	Control: Lower VAV Zone Temp Setpoint Success: VAV DAT near AHU DAT or VAV Zone Temp
3	Start Heating	Control: Raise VAV Zone Temp Setpoint Success: VAV DAT greater than AHU DAT

Successful Test Example

Failed Test Example

	Test Step	Result Description
1	AHU Min Pressure	If AHU Pressure is less than this number, the test automatically archives
2	VAV Zone Temp Setpoint Adjustment	How far below zone temp should the setpoint be set to stop heating? How far above zone temp should the setpoint be set to start heating?
3	VAV Stop Heating	After lowering the VAV setpoint, the VAV DAT should approach the zone temperature. How close does the VAV DAT need to be to verify that heating has stopped?
4	AHU Stop Heating	After lowering the VAV setpoint, the VAV DAT should approach the AHU DAT. How close does the VAV DAT need to be to verify that heating has stopped?
5	AHU Start Heating Temp	After raising the VAV setpoint, the VAV DAT should rise above the AHU DAT. How much greater should the VAV DAT be than AHU DAT to verify that heating has started?
6	Max Sequence Duration	What is the maximum length of time in seconds that a sequence should take to execute?
7	Min Sequence Duration	What is the minimum length of time in seconds that a sequence should take to execute?
8	Stabilization Time	How long in seconds should the program wait when one sequence finishes, before moving onto the next?

If you need assistance with interpreting your results, reach out to the support team at [email protected].

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