Tekmar tN2 House Control -Boiler, DHW & Setpoint, Mixing, Four Zone Valves

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    Tekmar tN2 House Control -Boiler, DHW & Setpoint, Mixing, Four Zone Valves


    Agency ApprovalsCSA C US, meets class B: ICES & FCC Part 15
    Ambient ConditionsIndoor use only, 32 to 104 degrees F (0 to 40 degrees C), RH less than or equal to 90 percent Non-condensing
    Boiler Stage1 Stage2 Relay24 V (ac) 5 A
    CallsSetpoint and DHW calls, Short, 0 - 32 V (ac)
    Control Load2 VA
    Control TypeMicroprocessor control, this is not a safety (limit) control
    Dimensions5.5" H x 5.5" W x 2.25" D (140 x 140 x 57 mm)
    Enclosure MaterialBlue PC+ABS plastic
    Enclosure NEMA RatingNEMA 1
    Hydronic - HVAC Control TypetN2 House Control
    Modulating OutputBoiler modulation 0 - 10 V (dc) 500 ohms min load impedance, 4 - 20 mA 1 k ohms max load impedance
    Power Supply24 V (ac) plus / minus 10 percent, 60 Hz, 100 VA max, Class 2
    Pump Power115 V (ac) 12 A max
    Pump Relay115 V (ac) 5 A, 1/6 hp
    SensorNTC thermistor, 10 k ohms at 77 degrees F (25 degrees C plus / minus 0.2 degrees C) Beta=3892
    Variable Pump115 V (ac) 2.4 A
    Zone Valve - Floating Action Load89 VA, 24 V (ac), 3.7 A for zones 1 to 4 plus floating action output

    The tekmarNet 2 House Control 402 is designed to operate all the mechanical equipment in a residential hydronic heating system, 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 multiple fan coils, mixed radiant floor heating zones, and a modulating/condensing boiler. This control regulates up to two heating water temperatures through Outdoor Temperature Reset and Indoor Temperature Feedback. It is capable of controlling a single on/off, two stage, or modulating boiler, a mixing device, Domestic Hot Water, setpoint loads, 4 on-board zone valves, and can expand up to 24 zones in total for each space heating water temperature.


    • DHW priority (optional), setpoint operation

    • Exercising, Boiler Protection

    • DHW post purge, DHW control

    • Outdoor temperature reset, indoor temperature feedback

    • Expandable up to 48 zones, single on/off, two stage, or modulating boiler control

    • Variable speed, floating action, or proportional mixing control, automatic boiler differential

    • Warm weather shut down, zone synchronization

    • Only requires 2 Wires Per Zone, Four 24 V (ac) powered zone outputs

    • For use with tekmarNet 2 thermostats only, tN4 expansion terminals

    Tekmar Zoning Solutions

    Tekmar Reset and Indoor Feedback

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