FCU Cooling

This workflow will test an FCU for its cooling 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 stop heating by commanding the hot water valve to 0%.
Then we will stop cooling by commanding the chilled water valve to 0%.
Finally we will command the chilled water valve to 100% to start cooling.

Outcome 🎯

This test will check a FCU’s ability to deliver cooling when the valve is set to 100%.

Recommended Schedule 📅

Device	Point Requirements 📌
FCU	FCU Fan % Cmd
	FCU Occupancy Cmd
	FCU Chilled Water Valve Command
	FCU Hot Water Valve Command
AHU	Discharge Air Pressure
Required Preconditions
1.	FCU Occupancy = Occupied
2.	FCU Fan Cmd% > 5%
3.	Chiller Diff Pressure > 10 PSI

*Variations

Workflow Overview

	Test Step	Workflow
1	Pre-condition Check	FCU is Occupied FCU Fan Cmd% > 5% Chiller Diff Pressure > 10 PSI
2	Stop Heating	Control: Cmd Hot Water Valve to 0% Success: FCU DAT is below the threshold
3	Stop Cooling	Control: Cmd Cold Water Valve to 0% Success: FCU DAT is greater than the threshold
4	Start Cooling	Control: Cmd Cold Water Valve to 100% Success: FCU DAT is below the threshold

Successful Test Example

	Test Step	Result Description
1	Chilled Water Valve Close Cmd	What value do you want to cmd the chilled water valve to to stop cooling?
2	Stop Cooling DAT Threshold	The DAT must be greater than this value to confirm cooling has stopped.
3	Hot Water Valve Close Cmd	What value do you want to cmd the hot water valve to to stop heating?
4	Stop Heating DAT Threshold	The DAT must be less than this value to confirm heating has stopped.
5	Chilled Water Valve Open Cmd	What value do you want to cmd the chilled water valve to to start cooling?
6	Start Cooling DAT Threshold	The DAT must be less than this value to confirm cooling has started.
7	FCU Fan Cmd % Low Limit	If the Fan Cmd % is less than this value, the test will automatically archive.
8	Stabilization Time	How long in seconds should the program wait when one sequence finishes, before moving onto the next?
9	Min Sequence Duration	What is the minimum length of time in seconds that a sequence should take to execute?
10	Max Sequence Duration	What is the maximum length of time in seconds that a sequence should take to execute?

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

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