Taco SR502-4 2-Zone Switching Relay

The Taco SR502-4 2-Zone Switching Relay operates as a control part for multiple heating zones in hydronic heating systems. The part operates two independent heating zones that enable users to set priority heating rules between zones. The relay and starts the boiler a heat request. It is switching relay that provides external indicator lights for easy diagnostics and allows priority settings changeability and simplified wiring and works with conventional and programmable thermostats. This relay system enables efficient heating customization and enhances both efficiency and ease of installation and maintenance operations.