An easier way to set all Xenta 102-AX dampers to maximum airflow setpoint

Issue

An easier way to set all Xenta 102-AX dampers to maximum airflow setpoint

Product Line

TAC Vista

Environment

Xenta 102-AX rev 2.1.2

Cause

Test and Balance often requires all Xenta 102-AXs open to max flow. It is preferable to not accomplish this by opening the plug-in, placing each damper in override and fiddling with it until airflow reads max flow. You could use nviManOverride, but at rev. 2.12 none of the flow options worked.

Resolution

The 102-AX was enhanced along the way with a better use of nviSpaceTemp. Before the enhancement, if that signal was bound, the controller always honored that input regardless of its value. The enhancement allows you to set the value back to invalid (e.g. 621.8°F) and then the controller will honor the hardwired space temp input.

Next time you want to force them all, bind nviSpaceTemp on all of them from one SNVT output. Control it to some value above their cooling bands and they will all open to cooling high flow.