Overview and specifications
Zone Ctrl II and
VAV Zone II Secondary Duct Installation and Start-up Guide
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You can also use a VAV Zone II Secondary Duct (OPN-SECTRM-02) controller and actuator, which controls damper
movement and has an integrated flow sensor to measure airflow on the secondary VAV box in a dual duct system.
The VAV Zone II Secondary Duct works only with a Zone Ctrl II. For details, see
Using a VAV Zone II Secondary Duct
(page 25).