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ARH Hydro Air Zone Control ,   Model: ARHAdditional Information
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.
•Choice of three models:– Single Zone/Expansion Module, Two-Zone with Priority, Three-Zone with Priority
•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

Brochure
  1. ARH Brochure Rev. 2/14
Installation & Operation Manual
  1. ARH Rev. B
  2.