Issue
Using Workplace Tech with a MNL-VxRVx controller, the nciBalanceOvrd snvt was used to set the VAV damper to the full closed and full open positions. After 10-15 minutes the override was automatically cleared. Why does this happen?
Environment
- Workplace Tech
- MNL-VxRVx controller
Cause
This is a built-in feature of the MNL-VxRVx controller.
Resolution
The override on this snvt times out and clears automatically - unless the override is re-applied every few minutes. This feature was added to prevent the damper from being left in an override state accidentally.
For example, when using the MicroNet Flow Balance Tool, a damper can be overridden open or closed as a part of a test balance. If the Tool was accidentally disconnected from the controller, or, the user forgot to release the override, the MNL controller will clear the override automatically after 10-15 minutes.