Using The Airflow Sensor; To Connect Duct Tubes To The Airflow Sensor - Carrier TruVu VAVB3-E2 Installation And Startup Manual

Using the airflow sensor

Using the airflow sensor
In a single duct or fan-powered application, the TV-VAVB3-E2 controls airflow using the built-in airflow sensor and
internal actuator.
In a dual duct system, the TV-VAVB3-E2 controls airflow for one duct using the built-in airflow sensor and internal
actuator. For the other duct, the TV-VAVB3-E2 uses the VAV Zone II Secondary Duct, which has its own airflow
sensor and actuator. Connect the VAV Zone II Secondary Duct to the TV-VAVB3-E2 Act Net port.

To connect duct tubes to the airflow sensor

NOTE Tubing should be at least 2 ft. (.61 meters) long for stable airflow measurement. The combined high and
low tubing length should not exceed 16.4 ft. (5 meters) in order to ensure accurate measurements.
For a single duct system
Turn off the TV-VAVB3-E2's power.
1
Connect the tubes to the TV-VAVB3-E2's airflow sensor port. Then connect those tubes to the duct's high and
2
low pressure tubes. Avoid sharp bends in the tubing.
NOTE You can connect the duct's high and low pressure tubes to either port. The TV-VAVB3-E2 automatically
determines the polarity and calculates for positive flow. The Driver Properties > Flow Calibration Archive
page displays the tubes' polarity.
For a dual duct system
Follow the single duct procedure above to connect the TV-VAVB3-E2 to the cold duct's tubes.
1
To connect the VAV Zone II Secondary Duct to the second duct's tubes, turn off the VAV Zone II Secondary
2
Duct's power.
Connect the secondary tubes to the duct's high and low pressure tubes. Avoid sharp bends in the tubing.
3
NOTE Be sure to match the high and low pressure VAV Zone II Secondary Duct airflow sensor and tubes.
TruVu™ VAVB3-E2
Installation and Start-up Guide
40
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