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Argo arh-2 hydro air control
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 also provide priority switching for domestic hot water. Boiler and A/C condenser wiring is virtually fool proof.
The ARH series of Hydro-Air controls will operate multiple thermostat and air handler installations using a single boiler. The relays provide intermediate switching for separate line and low voltage loads. These controls can operate from one to three zones - and can be expanded to 20 zones using the ARH-1 as an add-on expansion module.
When the thermostat calls for heat, the end switches close starting the boiler and the heating circulator is energized. The fan will operate at low speed (G1) when the water temperature is above the aquastat setting at the Hot Water Coil.
When priority zone is actuated, the priority circulator and end switches are energized. The heating circulator is shut off and the fan will operate at low speed (G1) until water temperature drops below the aquastat setting.
When the thermostat calls for cooling, the Argo control energizes the outdoor condenser and starts the fan on high speed (G2).
Optional freeze protection for Hot Water Coil - when the Freeze Terminals (TT) are shorted together as with a SPST actuator, the heating zone circulator will operate to circulate water through the Hot Water Coil.
* 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
* circular relays rated 10A at 120 VAC
* isolated contacts (end switch) rated 10A at 120 VA
