Tekmar 423Control Universal Reset Module for 2 Boilers Hydronic Heating System

Product Overview

The Universal Reset Module 423 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 four temperature systems comprised of multiple fan coils, baseboard, mixed radiant floor zones, and two modulating/condensing boilers. This control regulates up to four space heating water temperatures through Outdoor Temperature Reset and Indoor Temperature Feedback. It is capable of controlling two on/off or modulating boilers, Domestic Hot Water, set point loads, and can expand up to 24 zones for each space heating water temperature (96 in total).

• Automatic boiler differential
• Boiler protection
• DHW post purge
• DHW control
• Expandable up to 96 zones
• Controls up to 4 water temperatures
• One touch overrides
• Outdoor temperature reset
• Powered pump outputs
• Set point operation
• Two on/off or two modulating boiler control
• Warm weather shut down
• Zone synchronization
• Control - Microprocessor PID control, this is not a safety (limit) control
• Four tN4, two boiler, DHW and set point

Product Details