Tekmar 422Control Universal Reset Module for Hydronic Heating System

Product Overview

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, set point loads, and can expand up to 24 zones in total for each heating water temperature.

• Automatic boiler differential
• Boiler protection
• DHW post purge
• DHW control
• Expandable up to 48 zones
• One touch overrides
• Outdoor temperature reset
• Powered pump outputs
• Single on/off or modulating boiler control
• Variable speed or floating action mixing control
• Warm weather shut down
• Zone synchronization
• Control - Microprocessor PID control, this is not a safety (limit) control
• Two tN4, mixing, boiler, DHW and set point

Product Details