Does anyone have and can send me PDF's on Visual Logic programming and possibly a Users Manual?
I've got a job that has a BV (Binary Variable?) that's sent to all the parallel fan VAV box controllers. It is turning on all the fans even though the boxes are at 100% cooling demand. This is mixing the primary air (55*) with the heating air (return air) and providing 65* air causing the zones to overheat. (At least it's not turning on the electric heat also)
Someone obviously got confused between series and parallel boxes.
I see in the Visual Logic VAV file where the BV "input" is, but do not know how to find where it comes from, or change it and the program.
If I remove the BV from the fan input of the VAV controllers, would it revert to proper canned fan operation?
Sorry, I do not have any version or model numbers yet.