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

$ 692.82

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).

Features
• Automatic Boiler Differential
• Boiler Protection
• Controls up to 4 water temperatures (with use of up to 3 mix expansion modules)
• DHW Post Purge
• DHW Priority (optional)
• DHW control
• Exercising
• Expandable up to 96 zones
• Indoor Temperature Feedback
• One touch overrides (with optional User Switch)
• Outdoor Temperature Reset
• Powered pump outputs
• Setpoint operation
• System Setback (with optional Timer)
• Two on/off or two modulating boiler control
• Warm Weather Shut Down
• Zone Synchronization

Click to View Submittal Sheet
Click to View Installation Manual
Click to View Wiring Brochure

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