This system represents the most contractor-friendly solution today for eliminating bypass. The ZP3-HPS-ESP model is designed to fit up to three-zone applications for single-stage and multi-stage heat/cool systems in residential and light commercial applications. This zone control system has built-in ESP static pressure control, which eliminates the need for a bypass damper when used with the standard 3-wire MD series dampers.
The system works like any standard zone control system, with one exception. As zone dampers open and close, the ESP module continuously monitors the system static pressure and, if required, sends a signal to zone dampers in the closed position to open to a point where the proper static pressure level is maintained. The small amount of air allowed to bleed into non-calling zones eliminates air noise and assures proper airflow through the HVAC system preventing coil freeze-up.