Tekmar 423 Universal Reset Module 423 - Four tN4, Two Boiler, DHW & Setpoint

Tekmar 423 Universal Reset Module 423 - Four tN4, Two Boiler, DHW & Setpoint

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, setpoint loads, and can expand up to 24 zones for each space heating water temperature (96 in total).

• DHW priority (optional), setpoint operation
• Expandable up to 96 zones, two on/off or two modulating boiler control
• DHW post purge, DHW control
• Powered pump outputs, system setback (with optional timer)
• Controls up to 4 water temperatures (with use of up to 3 mix expansion modules), automatic boiler differential
• One touch overrides (with optional User Switch)
• Outdoor temperature reset, indoor temperature feedback
• Exercising, boiler protection
• Warm weather shut down, zone synchronization