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12 Volt, 6 Wire, Hydronic Radiant Floor Heat Thermostat by Radiant Technology

sunsetacesunsetace Member Posts: 3
I need to replace three of these 12 Volt, 6 Wire thermostats and cannot find them anywhere or in any brand, everything is 24 or 120 volt. The system was installed around 12 years ago and now the thermostats only function in an on/off mode and I can't control the temperature.

Any help or suggestions would be greatly appreciated - short of replacing the entire system :)

Comments

  • ZmanZman Member Posts: 5,327
    What is the other end of the tstat wire connected too? 12 volt is pretty unusual as is 6 wires. Is there a floor sensor?
    You are probably going to need to convert to 24 volt.
    "If you can't explain it simply, you don't understand it well enough"
    Albert Einstein
  • sunsetacesunsetace Member Posts: 3
    I am waiting to get an answer on what it is connected to, was not installed by me, not sure if there is a floor sensor, but I don't think there is - will post the answer as soon as I get it.

    Here is a photo of the wiring.

    How would I go about "converting" to 24 V?



  • ZmanZman Member Posts: 5,327
    There is a controller of some sort in your boiler room. It likely has at least 4 of those wires connected. Someone who has seen that t-stat may chime in, my guess is that 2 wires go to a floor sensor and 4 go to boiler room
    "If you can't explain it simply, you don't understand it well enough"
    Albert Einstein
  • sunsetacesunsetace Member Posts: 3
    ...and so the plot thickens, or loosens.

    Suddenly, it is no longer 12 volt, it is 24 volt.

    You are correct, 4 wires to controller in boiler room, 2 wires to the floor sensor.

    Most of the tstats I see are only 2 wire, can you recommend a non programmable, 24 v, 6 wire, radiant hydronic tstat?

    Thank you so much for your help, I have been trying to resolve this for a really long time!

  • STEVEusaPASTEVEusaPA Member Posts: 3,457
    Have you looked at Tekmar thermostats. You may not need all 4 wires to the boiler, and they have the 2 terminals for the floor sensor.
    steve
  • ZmanZman Member Posts: 5,327
    The tekmar is probably the way to go. You may have a complication with the floor sensor. I may not be compatible with the tekmar. Do you know where it is? Can you remove it.
    The other option is just to use 2 or 3 wires, use any thermostat and forget about the floor sensor.
    "If you can't explain it simply, you don't understand it well enough"
    Albert Einstein
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