- Cooling
- Fan operation
- Heating w/ Fan Ops
- Heating w/o Fan Ops
- Cooling w/ Fan Ops
- Cooling w/o Fan Ops
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: Run weekly per floor. Run when new FCUs are installed and programmed.
Point requirements:
| Device | Required points |
|---|---|
| FCU | FCU Fan % Cmd, FCU Occupancy Cmd, FCU Chilled Water Valve Command, FCU Hot Water Valve Command |
| AHU | Discharge Air Pressure |
Required preconditions
- FCU Occupancy =
Occupied - FCU Fan Cmd% >
5% - Chiller Diff Pressure >
10 PSI
Workflow overview
| 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 | 1. Control: Cmd Cold Water Valve to 100% 2. Success: FCU DAT is below the threshold |
Tuning parameters
| # | Parameter | Description |
|---|---|---|
| 1 | Chilled Water Valve Close Cmd | Value used to command the chilled water valve when stopping 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 | Value used to command the hot water valve when stopping 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 | Value used to command the chilled water valve when starting 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 support@kodelabs.com.
Testing procedure
Pre-conditions check
Before testing is started, it must be verified that the FCU is running.Verify that device isOccupied.If this condition is not met, STOP the workflow and ARCHIVE.
Setup testing conditions
In order to ensure that testing is accurate, outside sources of heating and cooling need to be eliminated or minimized. If any of these conditions are applicable and not verified, then the testing will be aborted.Stop Active Heating Weight: 1/3- Verify that discharge temperature is within
5△°F[Heating - Delta] above mixed temperature
- Verify that discharge temperature is within
5△°F[Cooling - Delta] below mixed temperature
Test the Fan
It must also be verified that the fan can successfully be commanded to start and stop. If either of these conditions are not verified, then the testing will be aborted.Test 1: Stop the Fan Weight: 1/3- Command the fan to
OFF - Pass if Fan Speed is reports to be less than
5%[Fan Max Threshold]
- Command the fan to
ON - Pass: Fan Percentage >=
10%[Fan Min Threshold]
Parameters
| Display | Hint |
|---|---|
Stop Fan Weight [1] | Weight on the overall test assigned to this sequence. All sequences sum up their weights and each weight is divided by this total. |
Fan Stop Command [%] | To what percentage do we want to test the stopping operation |
Heating Stop Command [%] | To what percentage do we want to test the closing operation |
Stop Heating Weight [1] | Weight on the overall test assigned to this sequence |
Stop Cooling Weight [1] | Weight on the overall test assigned to this sequence |
Fan Start Command [100%] | To what percentage do we want to test the starting operation |
Cooling Delta [5△°F] | The threshold tolerance for cooling. Delta between ZT and DAT. |
Fan Max Threshold [5%] | The maximum threshold (%) for a fan off status |
Fan Min Threshold [10%] | The minimum threshold (%) for a fan on status |
Reaction Time [240sec] | How long to wait for the actuators to fully do their job |
Stabilization Time [60sec] | How long to wait for the system to come to stability after an actuator command and the conditions have been fulfilled |
Measure After [60sec] | How long to wait in seconds to start checking the feedback readings |
Heating Delta [5△°F] | The threshold tolerance for heating. Delta between ZT and DAT. |
Fan Current Max Threshold [0.2Amp] | The maximum amps threshold for a fan off status |
Fan Current Min Threshold [0.3Amp] | The minimum amps threshold for a fan on status |
DAT Cooling Arb Threshold [19°F] | The DAT below which there would be indication of cooling |
Testing procedure
Pre-conditions check
Before testing is started, it must be verified that the FCU is running.Verify that device isOccupied.If this condition is not met, STOP the workflow and ARCHIVE.
Setup testing conditions
In order to ensure that testing is accurate, outside sources of heating and cooling need to be eliminated or minimized. If any of these conditions are applicable and not verified, then the testing will be aborted.Stop Active Heating Weight: 1/7- Verify that discharge temperature is within
5△°F[Heating - Delta] above mixed temperature
- Verify that discharge temperature is within
5△°F[Cooling - Delta] below mixed temperature
Test the Fan
It must also be verified that the fan can successfully be commanded to start and stop. If either of these conditions are not verified, then the testing will be aborted.Test 1: Stop the Fan Weight: 1/7- Command the fan to
OFF - Pass if Fan Speed is reports to be less than
5%[Fan Max Threshold]
- Command the fan to
ON - Pass: Fan Percentage >=
10%[Fan Min Threshold]
Test Heating
Test 3: Start Heating Operation Weight: 4/7- Command Heating to
ON - Pass if zone temp raised by at least
5△°F[Heating - Delta] OR - Pass if discharge temp is greater than
28°F[DAT Heating Arb Threshold]
Parameters
| Display | Hint |
|---|---|
Stop Fan Weight [1] | Weight on the overall test assigned to this sequence |
Fan Stop Command [%] | To what percentage do we want to test the stopping operation |
Start Heating Weight [4] | Weight on the overall test assigned to this sequence |
Heating Start Command [100%] | To what percentage do we want to test the opening operation |
Heating Stop Command [%] | To what percentage do we want to test the closing operation |
Stop Heating Weight [1] | Weight on the overall test assigned to this sequence |
Cooling Stop Command [%] | To what percentage do we want to test the closing operation |
Start Fan Weight [1] | Weight on the overall test assigned to this sequence |
Fan Start Command [100%] | To what percentage do we want to test the starting operation |
Cooling Delta [5△°F] | The threshold tolerance for cooling. Delta between ZT and DAT. |
Fan Max Threshold [5%] | The maximum threshold (%) for a fan off status |
Fan Min Threshold [10%] | The minimum threshold (%) for a fan on status |
Reaction Time [240sec] | How long to wait for the actuators to fully do their job |
Stabilization Time [60sec] | How long to wait for the system to come to stability after an actuator command and the conditions have been fulfilled |
Measure After [60sec] | How long to wait in seconds to start checking the feedback readings |
Heating Delta [5△°F] | The threshold tolerance for heating. Delta between ZT and DAT. |
DAT Heating Arb Threshold [28°F] | The DAT above which there would be indication of heating |
Fan Current Max Threshold [0.2Amp] | The maximum amps threshold for a fan off status |
Fan Current Min Threshold [0.3Amp] | The minimum amps threshold for a fan on status |
Testing procedure
Pre-conditions check
Before testing is started, it must be verified that the FCU is running.Verify that device isOccupied.If this condition is not met, STOP the workflow and ARCHIVE.
Setup testing conditions
In order to ensure that testing is accurate, outside sources of heating and cooling need to be eliminated or minimized. If any of these conditions are applicable and not verified, then the testing will be aborted.Stop Active Heating Weight: 1/6- Verify that discharge temperature is within
5△°F[Heating - Delta] above mixed temperature
- Verify that discharge temperature is within
5△°F[Cooling - Delta] below mixed temperature
Test Heating
Test 3: Start Heating Operation Weight: 4/6- Command Heating to
ON - Pass if zone temp raised by at least
5△°F[Heating - Delta] OR - Pass if discharge temp is greater than
28°F[DAT Heating Arb Threshold]
Parameters
| Display | Hint |
|---|---|
Heating Start Command [100%] | To what percentage do we want to test the opening operation |
Start Heating Weight [4] | Weight on the overall test assigned to this sequence |
Heating Stop Command [%] | To what percentage do we want to test the closing operation |
Stop Heating Weight [1] | Weight on the overall test assigned to this sequence |
Stop Cooling Weight [1] | Weight on the overall test assigned to this sequence |
Cooling Stop Command [%] | To what percentage do we want to test the closing operation |
Cooling Delta [5△°F] | The threshold tolerance for cooling. Delta between ZT and DAT. |
Fan Max Threshold [5%] | The maximum threshold (%) for a fan off status |
Fan Min Threshold [10%] | The minimum threshold (%) for a fan on status |
Reaction Time [240sec] | How long to wait for the actuators to fully do their job |
Stabilization Time [60sec] | How long to wait for the system to come to stability after an actuator command and the conditions have been fulfilled |
Measure After [60sec] | How long to wait in seconds to start checking the feedback readings |
Heating Delta [5△°F] | The threshold tolerance for heating. Delta between ZT and DAT. |
DAT Heating Arb Threshold [28°F] | The DAT above which there would be indication of heating |
Fan Current Max Threshold [0.5Amp] | The maximum threshold (Amps) for a fan off status |
Fan Current Min Threshold [1Amp] | The minimum threshold (Amps) for a fan on status |
Testing procedure
Pre-conditions check
Before testing is started, it must be verified that the FCU is running.Verify that device isOccupied.If this condition is not met, STOP the workflow and ARCHIVE.
Setup testing conditions
In order to ensure that testing is accurate, outside sources of heating and cooling need to be eliminated or minimized. If any of these conditions are applicable and not verified, then the testing will be aborted.Stop Active Heating Weight: 4/11- Verify that discharge temperature is within
5△°F[Heating - Delta] above mixed temperature
- Verify that discharge temperature is within
5△°F[Cooling - Delta] below mixed temperature
Test the Fan
It must also be verified that the fan can successfully be commanded to start and stop. If either of these conditions are not verified, then the testing will be aborted.Test 1: Stop the Fan Weight: 1/11- Command the fan to
OFF - Pass if Fan Speed is reports to be less than
5%[Fan Max Threshold]
- Command the fan to
ON - Pass: Fan Percentage >=
10%[Fan Min Threshold]
Test Cooling
Test 3: Start Cooling Operation Weight: 4/11- Command Cooling to
ON - Pass if zone temp dropped by at least
5△°F[Cooling - Delta] OR - Pass if discharge temp is less than
19°F[DAT Cooling Arb Threshold]
Parameters
| Display | Hint |
|---|---|
Stop Fan Weight [1] | Weight on the overall test assigned to this sequence |
Fan Stop Command [%] | To what percentage do we want to test the stopping operation |
Heating Stop Command [%] | To what percentage do we want to test the closing operation |
Stop Heating Weight [4] | Weight on the overall test assigned to this sequence |
Stop Cooling Weight [1] | Weight on the overall test assigned to this sequence |
Cooling Stop Command [%] | To what percentage do we want to test the closing operation |
Start Fan Weight [1] | Weight on the overall test assigned to this sequence |
Fan Start Command [100%] | To what percentage do we want to test the starting operation |
Cooling Delta [5△°F] | The threshold tolerance for cooling. Delta between ZT and DAT. |
Fan Max Threshold [5%] | The maximum threshold (%) for a fan off status |
Fan Min Threshold [10%] | The minimum threshold (%) for a fan on status |
Reaction Time [240sec] | How long to wait for the actuators to fully do their job |
Stabilization Time [60sec] | How long to wait for the system to come to stability after an actuator command and the conditions have been fulfilled |
Measure After [60sec] | How long to wait in seconds to start checking the feedback readings |
Heating Delta [5△°F] | The threshold tolerance for heating. Delta between ZT and DAT. |
DAT Cooling Arb Threshold [19°F] | The DAT below which there would be indication of cooling |
Fan Current Max Threshold [0.2Amp] | The maximum amps threshold for a fan off status |
Fan Current Min Threshold [0.3Amp] | The minimum amps threshold for a fan on status |
Cooling Start Command [100%] | To what percentage do we want to test the opening operation |
Start Cooling Weight [4] | Weight on the overall test assigned to this sequence |
Testing procedure
Pre-conditions check
Before testing is started, it must be verified that the FCU is running.Verify that device isOccupied.If this condition is not met, STOP the workflow and ARCHIVE.
Setup testing conditions
In order to ensure that testing is accurate, outside sources of heating and cooling need to be eliminated or minimized. If any of these conditions are applicable and not verified, then the testing will be aborted.Stop Active Heating Weight: 4/9- Verify that discharge temperature is within
5△°F[Heating - Delta] above mixed temperature
- Verify that discharge temperature is within
5△°F[Cooling - Delta] below mixed temperature
Test Cooling
Test: Start Cooling Operation Weight: 4/9- Command Cooling to
ON - Pass if zone temp dropped by at least
5△°F[Cooling - Delta] OR - Pass if discharge temp is less than
16°F[DAT Cooling Arb Threshold]
Parameters
| Display | Hint |
|---|---|
Heating Stop Command [%] | To what percentage do we want to test the closing operation |
Stop Heating Weight [4] | Weight on the overall test assigned to this sequence |
Stop Cooling Weight [1] | Weight on the overall test assigned to this sequence |
Cooling Stop Command [%] | To what percentage do we want to test the closing operation |
Cooling Delta [5△°F] | The threshold tolerance for cooling. Delta between ZT and DAT. |
Fan Max Threshold [5%] | The maximum threshold (%) for a fan off status |
Fan Min Threshold [10%] | The minimum threshold (%) for a fan on status |
Reaction Time [240sec] | How long to wait for the actuators to fully do their job |
Stabilization Time [60sec] | How long to wait for the system to come to stability after an actuator command and the conditions have been fulfilled |
Measure After [60sec] | How long to wait in seconds to start checking the feedback readings |
Heating Delta [5△°F] | The threshold tolerance for heating. Delta between ZT and DAT. |
DAT Cooling Arb Threshold [16°F] | The DAT below which there would be indication of cooling |
Fan Current Min Threshold [1Amp] | The minimum threshold (Amps) for a fan on status |
Fan Current Max Threshold [0.5Amp] | The maximum threshold (Amps) for a fan off status |
Cooling Start Command [100%] | To what percentage do we want to test the opening operation |
Start Cooling Weight [4] | Weight on the overall test assigned to this sequence |
Next steps
Run your first test
Run an on-demand FCU heating test and read the score.
VAV workflows
Explore the VAV workflow library for damper, heating, and airflow tracking tests.
AHU workflows
Explore the AHU workflow library for damper, heating, cooling, and VFD tests.
FTT projects
Assign workflows to devices and schedule automated testing.