The Universal Reset Module 422 is designed to operate all of the mechanical equipment in a hydronic heating system, except for zones, coordinating their operation through network communication. It can be used in applications ranging from a single zone of baseboard with an on/off boiler to multiple fan coils, mixed radiant floor zones, and a modulating/condensing boiler. This control regulates up to two heating water temperatures through Outdoor Temperature Reset and Indoor Temperature Feedback. It is capable of controlling a single on/off, two stage, or modulating boiler, a mixing device, Domestic Hot Water, setpoint loads, and can expand up to 24 zones in total for each heating water temperature.

• Outdoor temperature reset, indoor temperature feedback
• Warm weather shut down, zone synchronization
• DHW post purge, DHW control
• DHW priority (optional), expandable up to 48 zones
• Single on/off or modulating boiler control, variable speed, or floating action mixing control
• Automatic boiler differential, Exercising
• Boiler protection, powered pump outputs
• System setback (with optional Timer)
• One touch overrides (with optional User Switch)