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

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.


  • Automatic Boiler Differential
  • Boiler Protection
  • DHW Post Purge
  • DHW Priority (optional)
  • DHW control
  • Exercising
  • For use with tekmarNet®2 thermostats ONLY
  • Four 24 V (ac) powered zone outputs
  • Indoor Temperature Feedback
  • One touch overrides (with optional User Switch)
  • Only requires 2 Wires Per Zone
  • Outdoor Temperature Reset
  • Powered pump outputs
  • Setpoint operation
  • Single on/off, two stage, or modulating boiler control
  • System Setback (with optional Timer)
  • Warm Weather Shut Down
  • Zone Synchronization
  • tN4 expansion terminals


Control Microprocessor control. This is not a safety (limit) control
Packaged weight 1.4 lb (640 g)
Dimensions 5.5" H x 5.5" W x 2.25" D (140 x 140 x 57 mm)
Enclosure Blue PC+ABS plastic, NEMA type 1
Approvals CSA C US, meets class B: ICES & FCC Part 15
Ambient conditions Indoor use only, 32 to 104°F (0 to 40°C), RH ≤90% Non-condensing
Power supply 24 V (ac) ±10%, 60 Hz, 100 VA max, Class 2
Control load 2 VA
Zone valve/floating action load 89 VA, 24 V (ac), 3.7 A for zones 1 to 4 plus floating action output
Boiler stage 1, 2 relays 24 V (ac) 5 A
Pump power 115 V (ac) 12 A max
Pump relays 115 V (ac) 5 A, 1/6 hp
Setpoint and DHW calls Short, 0 - 32 V (ac)
Boiler modulation output 0 - 10 V (dc) 500 Ω min load impedance, 4 - 20 mA 1 kΩ max load impedance
Sensors NTC thermistor, 10 kΩ @ 77°F (25°C ±0.2°C) ß=3892
-Included Outdoor Sensor 070 and 3 of Universal Sensor 082
-Optional tekmar type#: 033, 479
Warranty Limited 3 Year Warranty

Current Literature

Product Submittal

Jan 2011 - Present


Installation & Operation Manual

Sep 2010 - Present


Quick Setup Guide

Sep 2010 - Present


Installing House Controls 400, 401, 402 and 403 with Modulating Boilers

Mar 2011 - Present


Part Number: 402

2 +$651.21

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