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The tekmarNet 2 House Control 403 is designed to operate all of 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, set-point loads, 4 on-board zone pumps, and can expand up to 24 zones in total for each space heating water temperature

  • Control: Microprocessor control
  • 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
  • Floating action load: 89 VA, 24 V (ac), 3.7 A
  • 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
  • Variable pump: 115 V (ac) 2.4 A
  • Setpoint and DHW calls: Short, 0 - 32 V (ac)
  • Boil/Mix modulating output: 0 - 10 V (dc) 500 ? min load impedance, 4 - 20 mA 1 k? max load impedance
  • Sensors: NTC thermistor, 10k @ 77°F (25°C ± 0.2°C) ß=3892
  • Included: Outdoor Sensor 070 and 2 of Universal Sensors 082
  • Enclosure: NEMA 1 rated, blue PC+ABS plastic
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Ambient Conditions:
Indoor use only 32 to 104°F < 90% RH non-condensing
Enclosure Type:
Boiler Relay:
24 V (ac) 5 A
Short. 0 - 32 V (ac)
0 - 10 V (dc) 3K ohms min load impedance
Power Supply:
24V (ac)
Zone Valve Load:
24 V (ac) 2 A
NTC Thermistor 10 k ohm @ 77°F
(2) 082 Sensors
070 Sensor
Pump Power:
115 V (ac) 12 A max
House Control
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