403

Product Image - 403
Product Image - 403
Product Image - 403
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Part of the Boiler and Mixing Controls Series

Ordering Code: 403

UPC: 779655040302

tN2 House Control, Boiler, DHW and Setpoint, Mixing, Four Zone Pumps

 

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tekmar Home




The tekmarNet (R) 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, setpoint loads, 4 on-board zone pumps, and can expand up to 24 zones in total for each space heating water temperature.

Features

  • Only requires 2 Wires Per Zone, Four 115 V (ac) powered zone outputs
  • For use with tekmarNet (R) 2 thermostats only, tN4 expansion terminals
  • Outdoor temperature reset, indoor temperature feedback
  • Warm weather shut down, zone synchronization
  • DHW post purge, DHW control
  • DHW priority (optional), setpoint operation
  • 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
  • Exercising, boiler protection
Specifications
Agency Approvals CSA C US, meets class B: ICES & FCC Part 15
Ambient Conditions Indoor use only, 32 to 104 degrees F (0 to 40 degrees C), RH 90 percent Non-condensing
Boiler Stage1 Stage2 Relay 24 V (ac) 5 A
Calls Setpoint and DHW calls, Short, 0 - 32 V (ac)
Control Load 2 VA
Control Type Microprocessor control, this is not a safety (limit) control
Dimensions 5 1/2 IN H x 5 1/2 IN W x 2 1/4 IN D (140 x 140 x 57 MM)
Enclosure Material Blue PC+ABS plastic
Enclosure NEMA Rating NEMA 1
Floating Action Load 89 VA, 24 V (ac), 3.7 A
Hydronic - HVAC Control Type tN2 House Control
Modulating Output Boiler modulation 0 - 10 V (dc) 500 ohms min load impedance, 4 - 20 mA 1 k ohms max load impedance
Power Supply 24 V (ac) plus / minus 10 percent 60 Hz, 100 VA max, Class 2
Pump Power 115 V (ac) 12 A max
Pump Relay 115 V (ac) 5 A, 1/6 hp
Sensor NTC thermistor, 10k at 77 degrees F (25 degrees C plus / minus 0.2 degrees C) Beta=3892
Variable Pump 115 V (ac) 2.4 A

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