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Anticipators

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Uni R_3
Uni R_3 Member Posts: 299
in THE MAIN WALL
http://boilerbuff.com/forum/index.php?topic=97.0

Comments

  • Mike.C
    Mike.C Member Posts: 43
    OK now peoples

    If you know what it is you can give me some info please.
    Links or just your opinion on using them.
  • Unknown
    Unknown
    what are

    What are we anticipating from this post?
  • Vermonter
    Vermonter Member Posts: 57
    Something vague.... [nt]

  • David Efflandt_2
    David Efflandt_2 Member Posts: 24
    If regarding thermostat...

    I am no expert. But mechanical thermostats typically have an adjustment based more or less on current draw through the thermostat to heat the thermostat to shut off early enough to not overshoot too much (lag between heat generation and transfer to the room).

    A good electronic thermostat (like I have now for 1-pipe steam) can actually learn what they need to do to keep room temperature constant (usually within less than 1 degree F, except while autolearning sudden climate change).

    A cheap electronic thermostat might have no anticipator. The one that I replaced had a minimum 1 degree on/off, but often overshot several degrees from heat retained by radiators.
  • Charles_8
    Charles_8 Member Posts: 74
    Cheap electronic t-stats

    You're right... There is a small variable resistance that acts as a heating element to get the t-stat to shut off early (hence the name "anticipator"). That way the stored heat in the system that's still coming after shutoff doesn't cause overshoot. The resistance is variable because the current draw of valves/controllers varies.

    That's my problem too - I bought a cheap digital one and it acts like there's no anticipator at all, overshooting 6 degrees. I'm trying to find someone in Honeywell who can tell me the tech details...
  • Mike.C
    Mike.C Member Posts: 43
    Thanks

    I knew the people who knew would respond. What kind of stats was it that you are using that have the anticipators?
  • Unknown
    Unknown
    Anticipators

    T86 or T87. Millivolt is not adjustable.

    Dave
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