
Tekmar Controls 403 Control
The Tekmar Controls 403 is a sophisticated 24Vac tN2 House Control designed for multi-zone hydronic systems requiring high-precision management of outdoor temperature reset and indoor temperature feedback. This microprocessor-based hub effectively coordinates boiler control, domestic hot water (DHW), and mixing valve operations through a centralized tekmarNet 2 bus. Built to drive up to 4 zone pumps on-board, the 403 supports single-stage, two-stage, or modulating boilers while offering versatile mixing options including variable speed injection, floating action, or 0-10 VDC/4-20 mA proportional signals. By optimizing the water temperature based on real-time load demand, it minimizes equipment cycling and maximizes fuel efficiency. The controller is expandable up to 24 zones when integrated with additional wiring centers, making it a reliable solution for complex residential or light commercial mechanical rooms. Contractors can utilize zone synchronization and warm weather shut down (WWSD) to further reduce parasitic heat loss and pump wear across the entire hydronic heating system.
Key Benefits- Advanced Connectivity: Integrates seamlessly with tekmarNet 2 thermostats for enhanced communication and system-wide synchronization.
- Flexible Mixing Control: Supports proportional mixing and floating action for various radiant floor and baseboard applications.
- Expansion Capabilities: Easily scales from a 4-zone setup to a comprehensive 24-zone network via tN4 expansion terminals.
- Optimized Efficiency: Uses outdoor reset logic to adjust supply temperatures, reducing boiler short-cycling and operational costs.
- DHW Priority: Integrated domestic hot water control with optional priority ensures consistent comfort without sacrificing space heating performance.
Can the Tekmar 403 control a modulating boiler?
Yes, the 403 provides dedicated 0-10 V (dc) or 4-20 mA outputs specifically for modulating boiler and mixing device integration.
Does this unit support two different water temperatures?
Absolutely. It can manage two distinct reset water temperatures, such as high-temp baseboard and low-temp radiant floor heating, using its mixing and boiler logic.
What happens to the zones during Warm Weather Shut Down?
When the outdoor temperature exceeds the user-defined WWSD setpoint, the control disables heating calls to prevent unnecessary energy consumption while maintaining DHW functionality.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $1,028.02
-65%$1,028.02
$359.81Tekmar Controls 403 Control
The Tekmar Controls 403 is a sophisticated 24Vac tN2 House Control designed for multi-zone hydronic systems requiring high-precision management of outdoor temperature reset and indoor temperature feedback. This microprocessor-based hub effectively coordinates boiler control, domestic hot water (DHW), and mixing valve operations through a centralized tekmarNet 2 bus. Built to drive up to 4 zone pumps on-board, the 403 supports single-stage, two-stage, or modulating boilers while offering versatile mixing options including variable speed injection, floating action, or 0-10 VDC/4-20 mA proportional signals. By optimizing the water temperature based on real-time load demand, it minimizes equipment cycling and maximizes fuel efficiency. The controller is expandable up to 24 zones when integrated with additional wiring centers, making it a reliable solution for complex residential or light commercial mechanical rooms. Contractors can utilize zone synchronization and warm weather shut down (WWSD) to further reduce parasitic heat loss and pump wear across the entire hydronic heating system.
Key Benefits- Advanced Connectivity: Integrates seamlessly with tekmarNet 2 thermostats for enhanced communication and system-wide synchronization.
- Flexible Mixing Control: Supports proportional mixing and floating action for various radiant floor and baseboard applications.
- Expansion Capabilities: Easily scales from a 4-zone setup to a comprehensive 24-zone network via tN4 expansion terminals.
- Optimized Efficiency: Uses outdoor reset logic to adjust supply temperatures, reducing boiler short-cycling and operational costs.
- DHW Priority: Integrated domestic hot water control with optional priority ensures consistent comfort without sacrificing space heating performance.
Can the Tekmar 403 control a modulating boiler?
Yes, the 403 provides dedicated 0-10 V (dc) or 4-20 mA outputs specifically for modulating boiler and mixing device integration.
Does this unit support two different water temperatures?
Absolutely. It can manage two distinct reset water temperatures, such as high-temp baseboard and low-temp radiant floor heating, using its mixing and boiler logic.
What happens to the zones during Warm Weather Shut Down?
When the outdoor temperature exceeds the user-defined WWSD setpoint, the control disables heating calls to prevent unnecessary energy consumption while maintaining DHW functionality.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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Description
The Tekmar Controls 403 is a sophisticated 24Vac tN2 House Control designed for multi-zone hydronic systems requiring high-precision management of outdoor temperature reset and indoor temperature feedback. This microprocessor-based hub effectively coordinates boiler control, domestic hot water (DHW), and mixing valve operations through a centralized tekmarNet 2 bus. Built to drive up to 4 zone pumps on-board, the 403 supports single-stage, two-stage, or modulating boilers while offering versatile mixing options including variable speed injection, floating action, or 0-10 VDC/4-20 mA proportional signals. By optimizing the water temperature based on real-time load demand, it minimizes equipment cycling and maximizes fuel efficiency. The controller is expandable up to 24 zones when integrated with additional wiring centers, making it a reliable solution for complex residential or light commercial mechanical rooms. Contractors can utilize zone synchronization and warm weather shut down (WWSD) to further reduce parasitic heat loss and pump wear across the entire hydronic heating system.
Key Benefits- Advanced Connectivity: Integrates seamlessly with tekmarNet 2 thermostats for enhanced communication and system-wide synchronization.
- Flexible Mixing Control: Supports proportional mixing and floating action for various radiant floor and baseboard applications.
- Expansion Capabilities: Easily scales from a 4-zone setup to a comprehensive 24-zone network via tN4 expansion terminals.
- Optimized Efficiency: Uses outdoor reset logic to adjust supply temperatures, reducing boiler short-cycling and operational costs.
- DHW Priority: Integrated domestic hot water control with optional priority ensures consistent comfort without sacrificing space heating performance.
Can the Tekmar 403 control a modulating boiler?
Yes, the 403 provides dedicated 0-10 V (dc) or 4-20 mA outputs specifically for modulating boiler and mixing device integration.
Does this unit support two different water temperatures?
Absolutely. It can manage two distinct reset water temperatures, such as high-temp baseboard and low-temp radiant floor heating, using its mixing and boiler logic.
What happens to the zones during Warm Weather Shut Down?
When the outdoor temperature exceeds the user-defined WWSD setpoint, the control disables heating calls to prevent unnecessary energy consumption while maintaining DHW functionality.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.












