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Airflow Control


I/O Points microblock

The ZN Airflow Control microblock provides the airflow control algorithm for ZN Line of control devices. This microblock provides inputs and outputs to control variable air volume (VAV) utilizing the internal devices of the ZN341V+, or external devices used with the ZN Line. This microblock also provides a test and balance procedure.

The inputs in this microblock are used to determine the flow setpoint and minimum flow parameters; these are used by the flow control algorithm. The algorithm opens or closes the dampers to maintain the actual flow at the desired setpoint. If the measured flow falls below the minimum flow parameter, the algorithm sends a one-second open signal to the dampers to ensure that the airflow into the zone does not fall below the required minimum.

The number of damper movements (open or closed) per day is displayed on the Properties page of the ZN Airflow Control microblock.

Properties

NOTE  Alt+click any value in WebCTRL to view property details, including its expression and editing privilege.