3-Zone Expandable Switching Relay with Priority

Taco Switching Relays combine clearly labeled PC board layouts with advanced features that allow for total system customization. Whether using basic priority switching or the advanced features of the -EXP controls, the job is made easy. External indicator lights provide instant diagnostic feedback, making a snap of service calls or new installation start-ups. All switching relays are UL Listed, are compatible with conventional and programmable thermostats.”,”highlights”:[“Basic priority switching and EXP controls for smooth operation”,”Built-in priority protection for safe use”,”Universal thermostat compatibility”