
Tekmar Controls 400 Control
The Tekmar Controls 400 is a high-performance tN2 House Control designed for precise hydronic heating system management. This 24Vac microprocessor-based controller integrates one outdoor reset water temperature with Domestic Hot Water (DHW) and setpoint capabilities, allowing for seamless coordination between the heat source and a 4-zone valve layout. Engineered as the hub for tekmarNet 2 (tN2) communication, this unit optimizes boiler modulation via 0-10 V (dc) or 4-20 mA signals, significantly reducing short-cycling and improving thermal efficiency through indoor temperature feedback.
For contractors managing complex residential or light commercial footprints, the Tekmar 400 offers scalability; with tekmarNet 4 (tN4) expansion terminals, the system can grow up to 24 zones. Advanced logic including zone synchronization and outdoor temperature reset ensures that the water temperature is dynamically adjusted based on real-time load requirements. The unit also features built-in boiler protection, exercising routines, and warm weather shut down to safeguard equipment and minimize energy consumption during shoulder seasons.
Key Benefits
- System Efficiency: Utilizes outdoor reset and indoor feedback to calculate the lowest precise water temperature required to satisfy demand.
- Reduced Short-Cycling: Zone synchronization combines multiple small heat calls into a single, longer boiler run for improved longevity.
- Integrated DHW Priority: Simplifies water heater management with an optional priority override to ensure consistent domestic hot water delivery.
- Expansion Ready: Native support for 4 zone valves, expandable to 24 zones through tN4 terminals and additional wiring centers.
- Pro-Grade Diagnostics: Digital display provides clear status of the tN2 communication network and relay outputs for faster troubleshooting.
Common Questions
Can I use standard 24V thermostats with the Tekmar 400?
The Tekmar 400 is specifically designed for tekmarNet 2 (tN2) thermostats. While advanced tN4 thermostats can be used with expansion modules, standard 24V thermostats will not provide the indoor temperature feedback needed for full system optimization.
Does this control support modulating/condensing boilers?
Yes. This control is equipped with an isolated output for boiler modulation (0-10V or 4-20mA), making it compatible with most modern ModCon boilers on the market for variable fire rate control.
How many wires are required for the thermostats?
One of the primary advantages of this system is that it only requires 2 wires per zone for the tN2 thermostats, making it an ideal solution for retrofitting older hydronic systems without re-pulling cable.
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: $784.29
-65%$784.29
$274.50Tekmar Controls 400 Control
The Tekmar Controls 400 is a high-performance tN2 House Control designed for precise hydronic heating system management. This 24Vac microprocessor-based controller integrates one outdoor reset water temperature with Domestic Hot Water (DHW) and setpoint capabilities, allowing for seamless coordination between the heat source and a 4-zone valve layout. Engineered as the hub for tekmarNet 2 (tN2) communication, this unit optimizes boiler modulation via 0-10 V (dc) or 4-20 mA signals, significantly reducing short-cycling and improving thermal efficiency through indoor temperature feedback.
For contractors managing complex residential or light commercial footprints, the Tekmar 400 offers scalability; with tekmarNet 4 (tN4) expansion terminals, the system can grow up to 24 zones. Advanced logic including zone synchronization and outdoor temperature reset ensures that the water temperature is dynamically adjusted based on real-time load requirements. The unit also features built-in boiler protection, exercising routines, and warm weather shut down to safeguard equipment and minimize energy consumption during shoulder seasons.
Key Benefits
- System Efficiency: Utilizes outdoor reset and indoor feedback to calculate the lowest precise water temperature required to satisfy demand.
- Reduced Short-Cycling: Zone synchronization combines multiple small heat calls into a single, longer boiler run for improved longevity.
- Integrated DHW Priority: Simplifies water heater management with an optional priority override to ensure consistent domestic hot water delivery.
- Expansion Ready: Native support for 4 zone valves, expandable to 24 zones through tN4 terminals and additional wiring centers.
- Pro-Grade Diagnostics: Digital display provides clear status of the tN2 communication network and relay outputs for faster troubleshooting.
Common Questions
Can I use standard 24V thermostats with the Tekmar 400?
The Tekmar 400 is specifically designed for tekmarNet 2 (tN2) thermostats. While advanced tN4 thermostats can be used with expansion modules, standard 24V thermostats will not provide the indoor temperature feedback needed for full system optimization.
Does this control support modulating/condensing boilers?
Yes. This control is equipped with an isolated output for boiler modulation (0-10V or 4-20mA), making it compatible with most modern ModCon boilers on the market for variable fire rate control.
How many wires are required for the thermostats?
One of the primary advantages of this system is that it only requires 2 wires per zone for the tN2 thermostats, making it an ideal solution for retrofitting older hydronic systems without re-pulling cable.
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.
Product Information
Product Information
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Description
The Tekmar Controls 400 is a high-performance tN2 House Control designed for precise hydronic heating system management. This 24Vac microprocessor-based controller integrates one outdoor reset water temperature with Domestic Hot Water (DHW) and setpoint capabilities, allowing for seamless coordination between the heat source and a 4-zone valve layout. Engineered as the hub for tekmarNet 2 (tN2) communication, this unit optimizes boiler modulation via 0-10 V (dc) or 4-20 mA signals, significantly reducing short-cycling and improving thermal efficiency through indoor temperature feedback.
For contractors managing complex residential or light commercial footprints, the Tekmar 400 offers scalability; with tekmarNet 4 (tN4) expansion terminals, the system can grow up to 24 zones. Advanced logic including zone synchronization and outdoor temperature reset ensures that the water temperature is dynamically adjusted based on real-time load requirements. The unit also features built-in boiler protection, exercising routines, and warm weather shut down to safeguard equipment and minimize energy consumption during shoulder seasons.
Key Benefits
- System Efficiency: Utilizes outdoor reset and indoor feedback to calculate the lowest precise water temperature required to satisfy demand.
- Reduced Short-Cycling: Zone synchronization combines multiple small heat calls into a single, longer boiler run for improved longevity.
- Integrated DHW Priority: Simplifies water heater management with an optional priority override to ensure consistent domestic hot water delivery.
- Expansion Ready: Native support for 4 zone valves, expandable to 24 zones through tN4 terminals and additional wiring centers.
- Pro-Grade Diagnostics: Digital display provides clear status of the tN2 communication network and relay outputs for faster troubleshooting.
Common Questions
Can I use standard 24V thermostats with the Tekmar 400?
The Tekmar 400 is specifically designed for tekmarNet 2 (tN2) thermostats. While advanced tN4 thermostats can be used with expansion modules, standard 24V thermostats will not provide the indoor temperature feedback needed for full system optimization.
Does this control support modulating/condensing boilers?
Yes. This control is equipped with an isolated output for boiler modulation (0-10V or 4-20mA), making it compatible with most modern ModCon boilers on the market for variable fire rate control.
How many wires are required for the thermostats?
One of the primary advantages of this system is that it only requires 2 wires per zone for the tN2 thermostats, making it an ideal solution for retrofitting older hydronic systems without re-pulling cable.
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.












