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Tekmar 519

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ken3320
ken3320 Member Posts: 10
in Thermostats and Controls

I need some conformation. I have radiant hot water heat in slab floor . My question is will a Tekmar 519 with sensor work correctly if it is wired with a Red wire, White wire, and batteries ? I have a 2 wire system with no C wire.

Thanks

Comments

  • hot_rod
    hot_rod Member Posts: 26,604

    The sensor wires to the stat location, 2 wires

    You need 24V going to the stat, line and common, then a switched wire, 3 wires

    Screenshot 2025-11-16 at 11.58.56 AM.png
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
    GGross
  • ken3320
    ken3320 Member Posts: 10

    Thank you HR . I was hoping red and white wires and battery back up would make this thermostat work since it is heat only .

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