Argo 3 Zone Valve Switching Relay with 2 Air and 1 Priority

ARGO Hydro-Air Controls provide the easiest way to interface between the thermostat and air handler. These dependable control relays will control from 1 to 20 zones of heating/cooling and provide priority switching for domestic hot water. Boiler and A/C condenser wiring is virtually fool proof. Features All ARH models have plug-in connectors for easy expansion up to 20 zones. Multiple terminals for 2-speed air handlers Built-in air handler "Freeze Protection" Switchable Priority for domestic hot water applications LED diagnostic lights for easy troubleshooting Includes strap-on bi-metal aquastat to prevent "cold air" circulation in heating mode. 5-year Limited Warranty 100% quality controlled All controls supported by ARGO Technical/Training Programs