The VAV system consists of several components, which include the following:
- VAV Box Controllers
- Verasys Zone Coordinator (VZC)
- Rooftop unit (RTU), heat pump, or split system equipment with SMART Equipment controls
- Verasys Equipment Controller (VEC)
The system uses either the VEC or the RTU, heat pump, or split system equipment with SMART Equipment controls. The VEC controller communicates with non-smart equipment RTUs on a VAV System. The VEC controller communicates in a similar manner to a thermostat controller. Therefore, the unit must have a thermostat interface for the controller to control. The controller also has outputs to directly control the variable frequency drive (VFD) of the unit.
The following sections provide a description of VAV system behavior in the various operating modes.