We have a VMA1420 that is setup for cooling only. This worked fine until modications were done to the AHU which now controls supply air based on OAT.
Basically, in summer mode the VMA damper will open to cool and close to heat.
In winter mode, the damper should open to heat and close to cool. But since the VMA is in cooling only, the damper closes when we need to heat up the room.
Since the VMA doesn't work in this manor (winter mode) how can I change the VMA to open (moduate) the damper in winter to proivde heating.
In the Q&A no heating is selected.