Hi,

Can a FCU be a Master and a VAV a slave in one room?

Many thanks,

Hi

We tried this on a project with the FCU as a master and VAV as a slave. The different types of Segments did not talk to each other for demands. In order to get it to work, we put the VAV heating and cooling demand signals out of service and wrote the FCU demands to them via a PXC controller.

It worked ok but the graphic template did not work very well and showed errors. In the end, we had the FCU and VAVs as separate rooms.

Warren Pinker

Hi

We tried this on a project with the FCU as a master and VAV as a slave. The different types of Segments did not talk to each other for demands. In order to get it to work, we put the VAV heating and cooling demand signals out of service and wrote the FCU demands to them via a PXC controller.

It worked ok but the graphic template did not work very well and showed errors. In the end, we had the FCU and VAVs as separate rooms.

 So you put all FCUs in one room segment and all VAVs in another room segment. Did you use a touchscreen as we can only have one touchscreen per master....

Many thanks

Hello,

no, they are not compatible. The room application hasn't right interfaces and the coordination of the those 2 different technologies will not works correctly.

If you want to combine those two , then I would like to recommend to use FPB application (Hvac13) and adapt it in the ABT Pro regarding to your needs.