Outcome 🎯

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

Recommended Schedule 📅

1. Run weekly per floor

2. Run when new FCUs are installed and programmed.

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  

Test Step

Workflow

1

Pre-condition Check

1. FCU is Occupied

2. FCU Fan Cmd% > 5%

3. Chiller Diff Pressure > 10 PSI  

2

Stop Heating

1. Control:  Cmd Hot Water Valve to 0%

2. Success: FCU DAT is below the threshold

3

Stop Cooling

1. Control:  Cmd Cold Water Valve to 0%

2. Success: FCU DAT is greater than the threshold

4

Start Cooling 

3. Control:  Cmd Cold Water Valve to 100%

4. Success: FCU DAT is below the threshold

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?