How is the APR Control used in VAV System enhancements?

Whether on multiple zone VAV applications or simply where a VFD has been added to evaporator fan, the APR Control will modulate the capacity of the system to match the changing load. By responding to changes in suction pressure, the APR will reduce systems’ cooling capacity as the load on the evaporator is reduced (via zoning or simply a VFD) putting the system in to balance so risks associated with low airflow associated with VAV systems can be eliminated.