DZNT VAV / VVT Installation Guide
Page 8 of 16
Document Edition 1.2
2.
Command the VAV box to control to the Maximum cooling airflow setpoint to verify that the damper
is being controlled properly. The next step, Calibrating the airflow reading, must be done with the
assistance of the Air Balancing technician, and can be skipped for now.
3.
Exit the
HcF
submenu.
5. Set the Minimum Heating Airflow Setpoint
1.
Enter the Low Heating Flow (
LhF
) submenu, and adjust the minimum heating airflow setpoint to the
desired value.
2.
Exit the
LhF
submenu.
6. Set the Maximum Heating Airflow Setpoint
1.
Enter the High Heating Flow (
HhF
) submenu, and adjust the maximum heating airflow setpoint to the
desired value.
2.
Exit the
HhF
submenu.
7. Return the VAV box to Automatic Control
1.
Exit the Balancing Menu, and exit the Service Menu.
2.
When you are prompted to set the
CTL
to YES or NO, select YES to return all parameters to
Automatic.
3.
Go to the next screen and exit the Service Menu.
Final Air Balancing
1. Zero Calibrating the Air Flow Sensor (only if required)
The sensor is pre-zeroed and this step is required if reading flow when damper is closed, or when the input
shows no airflow when there is more than negligible actual air flow through the box.
1.
Disconnect the tubing from both sides of the airflow sensor, or turn off system fan to ensure that there
is no flow sensed.
2.
Enter the Close (
CLo
) submenu, and command the damper closed.
3.
Once the damper is closed, zero calibrate the airflow sensor.
4.
Once this is complete, exit the
CLo
submenu.
2. Automatically Correct the Airflow Factor (K-Factor)
1.
Enter the High Cooling Flow (
HcF
) submenu.
2.
Command the VAV box to control to the Maximum cooling airflow setpoint. Once the airflow has
reached setpoint, measure the actual airflow with the assistance of the Air Balancing technician.
3.
Set the Airflow reading to the actual measured value and go to the next screen. The corrected Air
Flow Factor (K-Factor) will be displayed. The VAV box has now been completely balanced.
4.
Exit the
HcF
submenu.
3. Return the VAV box to Automatic Control
1.
Exit the Balancing Menu, and exit the Service Menu.
2.
When you are prompted to set the
CTL
to YES or NO, select YES to return all parameters to
Automatic.
3.
Go to the next screen and exit the Service Menu.