The ZVC403-4 is a zone valve control for managing up to three zones in a hydronic system easily and efficiently. Mounting and wiring the ZVC403-4 is simple thanks to a compact, sturdy enclosure and contractor friendly PC board layout. With universal thermostat compatibility, Taco's zone valve controls are easily integrated into any system. In addition to handling zone valves, the ZVC403-4 also has two end switches for system, secondary, or DHW pumps.
Protected Priority Switching
With the ZVC403-4, a single zone may be designated as a priority zone whose heating demands are given precedence over other zones. Other demands will be met when the priority zone is satisfied or after sixty minutes of priority operation.