Issue
Is there any adaptive tuning in the flow control loop that drives the MP-V or RP-V damper loop that will be negatively impacted by extended periods of non-zero box flow setpoints when the associated AHU is disabled (i.e. no pressure at VAV so the damper will open fully and the flow control loop will saturate).
Product Line
EcoStruxure Building Operation
Environment
- Building Operation Multi-purpose VAV
- EasyLogic RP-V
Cause
No information on the internal Variable Air Volume Data object
Resolution
Airflow control in the MP and RP VAV controllers is not impacted by extended periods of non-zero box flow setpoints when the associated AHU is disabled. The damper is actuated by a single-speed motor with three states (open, close, hold), and to avoid windup or saturation effects, the flow control algorithm is not a PID loop. There is no need to link the AHU enable to the MP or RP flow control logic.
