To Calibrate Vav Zone Airflow - Carrier VAV Zone II Installation And Startup Manual

To calibrate VAV Zone airflow

Select the VAV Zone air terminal in the tree.
1
NOTE You can select View > Device ID or View > Primary Use to show this information next to each item in
the tree.
Select the Test and Balance tab.
2
NOTE If
do before calibration can occur.
Verify that the air source is off and that airflow has stopped.
3
Click Zero Calibrate.
4
NOTE The table below describes each damper command. Commands with a
commands improve system accuracy. Do these in order from top to bottom for best results.
The status bar shows Damper Moving. Wait until it shows Damper Ready.
5
If the controller has an external actuator, do the following:
6
a) Type the Measured Flow in the fields beside Zero Calibrate.
b) Click the Current Sensor Reading button to copy the value to the Sensor Reading field, or type an
adjusted value in the field.
Turn on the air source.
7
For each additional calibration step that you want to perform, do the following:
8
a) Click its Damper Command button.
b) Wait for Damper Ready.
c) Enter the Measured Flow and Sensor Reading as described in step 6.
Click Apply to send your changes to the controller and update the Last Calibration Date on the air source's
9
page.
NOTE If desired, you can click Apply after each calibration step.
10 Remove any locks you have applied. See To view, lock, or unlock an air terminal function.
11 Click Automatic to return the controller to normal operation.
NOTES

For Cool Max, Heat Max, and Occupied Min – When the setpoint is reached and stable, you can select Lock
damper at current open position on the Locks tab to prevent damper movement while you take flow
readings.

You can repeat a calibration step to further calibrate the airflow sensor.

An airflow sensor only reports air delivered from the air source. To adjust the cfm (liters/second) of variable
speed fans in parallel VAV reheat, close the primary air damper.
Damper Command
Zero Calibrate
Damper Open
VAV Zone II Controllers
Installation and Start-up Guide
or appear on the status bar, see Air terminal calibration status to determine what you must
Action
Closes the damper, takes a number of flow samples, then sets the zero calibration.
Opens damper fully and enables the Damper Open calibration fields.
45
Start-up
are required. Optional
CARRIER CORPORATION ©2019
All rights reserved