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  1. foxt
    Post

    Replace tekmar sensor with generic thermistor?

    Thanks Eliot. Tom
    Post by: foxt, Nov 1, 2010 in forum: The Boiler Room - Wood Boilers and Furnaces
  2. foxt
    Thread

    Replace tekmar sensor with generic thermistor?

    It appears that the outdoor sensor for my tekmar zone controller has failed. Can I replace that with a generic 10k @25C thermistor with the same...
    Thread by: foxt, Oct 31, 2010, 5 replies, in forum: The Boiler Room - Wood Boilers and Furnaces
  3. foxt
    Post

    Garn water temp - difference between front and rear?

    That's a great idea. I picked up a tekmar controller to dedicate to variable speed control of the GARN circ based on deltaT at the fphx, but...
    Post by: foxt, Nov 24, 2009 in forum: The Boiler Room - Wood Boilers and Furnaces
  4. foxt
    Post

    Garn water temp - difference between front and rear?

    Thanks for that Steve. I'm appreciative of all of the help from you and others on this forum. I don't want to give anyone the wrong impression - I...
    Post by: foxt, Nov 24, 2009 in forum: The Boiler Room - Wood Boilers and Furnaces
  5. foxt
    Post

    Garn water temp - difference between front and rear?

    Whoops Jim, I'm not pumping 24/7 in the GARN loop. The tekmar that runs my distribution system decides when to generate a boiler demand. When it...
    Post by: foxt, Nov 24, 2009 in forum: The Boiler Room - Wood Boilers and Furnaces
  6. foxt
    Post

    Garn water temp - difference between front and rear?

    Ok, thanks for that. That's what I expected to be the right way to do it, and probably would have done from the start if I had known I shouldn't...
    Post by: foxt, Nov 23, 2009 in forum: The Boiler Room - Wood Boilers and Furnaces
  7. foxt
    Post

    Garn water temp - difference between front and rear?

    Jim, Thanks for that, but I have a question: my piping is not p/s, but rather a single loop that feeds the house via fphx directly; if I put...
    Post by: foxt, Nov 23, 2009 in forum: The Boiler Room - Wood Boilers and Furnaces
  8. foxt
    Post

    Garn water temp - difference between front and rear?

    Just a note - front gauge is higher than the supply port. If you use the front gauge to determine to fire, you may actually be firing too late if...
    Post by: foxt, Nov 22, 2009 in forum: The Boiler Room - Wood Boilers and Furnaces
  9. foxt
    Post

    Garn water temp - difference between front and rear?

    Not sure I understand this last one, but I'll explain what I have and maybe that will answer both or your questions ... GARN circ supplies fphx...
    Post by: foxt, Nov 22, 2009 in forum: The Boiler Room - Wood Boilers and Furnaces
  10. foxt
    Post

    Garn water temp - difference between front and rear?

    Hey heaterman, As always, so glad you are here! I think you have now seen what I have seen, and what Rick may see. What is curious about this...
    Post by: foxt, Nov 22, 2009 in forum: The Boiler Room - Wood Boilers and Furnaces
  11. foxt
    Post

    Garn water temp - difference between front and rear?

    Thanks for the replies. I am pretty sure that the variation isn't due to the different temp gauges/devices - as Rick reported, I too see front/back...
    Post by: foxt, Nov 18, 2009 in forum: The Boiler Room - Wood Boilers and Furnaces
  12. foxt
    Post

    Garn water temp - difference between front and rear?

    Jim, Thanks for that. Just to clarify - the max front/back delta I see is about 25*, I think Rick reported that he saw over 40* this morning. He...
    Post by: foxt, Nov 17, 2009 in forum: The Boiler Room - Wood Boilers and Furnaces
  13. foxt
    Post

    Garn water temp - difference between front and rear?

    Rick, The pump I dropped in there for that experiment was indeed one of those black submersible sump pumps. IIRC, it was a Flotec 1300x, I think...
    Post by: foxt, Nov 17, 2009 in forum: The Boiler Room - Wood Boilers and Furnaces
  14. foxt
    Post

    Garn water temp - difference between front and rear?

    That's what I thought would happen. I get the top/bottom stratification; what is puzzling me is the variation that apparently sets up in at least...
    Post by: foxt, Nov 8, 2009 in forum: The Boiler Room - Wood Boilers and Furnaces
  15. foxt
    Post

    Garn water temp - difference between front and rear?

    heaterman, yes, it is causing me a problem, or at least a perceived one. The control for the GARN circ uses a sensor mounted in a thermowell next to...
    Post by: foxt, Nov 7, 2009 in forum: The Boiler Room - Wood Boilers and Furnaces
  16. foxt
    Post

    Garn water temp - difference between front and rear?

    I had about a 20* difference this morning, and decided it was time to drop a submersible pump into the tank and see what happens. I don't recall...
    Post by: foxt, Nov 6, 2009 in forum: The Boiler Room - Wood Boilers and Furnaces
  17. foxt
    Post

    Garn water temp - difference between front and rear?

    Goose, Yes, I can measure/observe a 10-15 degree delta between the front and back of the tank via thermometers installed in thermowells at the...
    Post by: foxt, Nov 6, 2009 in forum: The Boiler Room - Wood Boilers and Furnaces
  18. foxt
    Post

    Garn water temp - difference between front and rear?

    I should have also referred to this other thread where there was some exchange on this starting on page 2.
    Post by: foxt, Nov 5, 2009 in forum: The Boiler Room - Wood Boilers and Furnaces
  19. foxt
    Post

    Garn water temp - difference between front and rear?

    I even have the same pump, and have also not noticed any affect on the temp behavior based upon pump speed. Where do you have your supply plumbed -...
    Post by: foxt, Nov 5, 2009 in forum: The Boiler Room - Wood Boilers and Furnaces
  20. foxt
    Post

    Garn water temp - difference between front and rear?

    I'd love to compare notes on this. I am still seeing something similar, although my temp drop is not as significant - more like 20*. I didn't have...
    Post by: foxt, Nov 5, 2009 in forum: The Boiler Room - Wood Boilers and Furnaces
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