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  1. #1
    Join Date
    Dec 2012
    Location
    Sacramento
    Posts
    3

    W7100B obsolete heating controller

    Has anyone found a decent replacement for this 6 stage discharge air heating controller?

  2. #2
    Join Date
    Dec 2006
    Location
    new england
    Posts
    587
    I'd try your Honeywell rep and see if they can cross it with something modern.
    Chaos equals cash$$$

  3. #3
    Join Date
    Jun 2006
    Location
    New Jersey
    Posts
    4,291
    I redid a MAU awhile ago with a W7100B. It was controlling 6 stages of electric heat.

    I used a EasyIO controller and then used a 0-20mA signal to a Kele sequencer for the electric heat.

    You could use pretty much any controller you prefer that put's out a 0-20mA or 0-15vDC signal. You can also really use 4-20mA and 0/2-10vDC.

    Here's a link to the Kele product-
    http://www.kele.com/transducers/ucs-621e.aspx

    If you don't have the means for a custom controller, then you could just use a Honeywell T775 with the Kele sequencer. You are going to have to tweak the Kele abit, because the T775 is 4-20mA.

  4. #4
    Join Date
    Dec 2012
    Location
    Sacramento
    Posts
    3
    Thanks all!

  5. #5
    Join Date
    Apr 2010
    Location
    Ontario
    Posts
    464
    Do you need all 6 stages? W775 has 4 stages.
    ENJOY THE RIDE

  6. #6
    Join Date
    Apr 2011
    Location
    Coastal Maine
    Posts
    775
    Quote Originally Posted by ascj View Post
    I redid a MAU awhile ago with a W7100B. It was controlling 6 stages of electric heat.

    I used a EasyIO controller and then used a 0-20mA signal to a Kele sequencer for the electric heat.

    You could use pretty much any controller you prefer that put's out a 0-20mA or 0-15vDC signal. You can also really use 4-20mA and 0/2-10vDC.

    Here's a link to the Kele product-
    http://www.kele.com/transducers/ucs-621e.aspx

    If you don't have the means for a custom controller, then you could just use a Honeywell T775 with the Kele sequencer. You are going to have to tweak the Kele abit, because the T775 is 4-20mA.
    Good advice. I go to Kele for all my obsolete stuff. Their tech support guys are top notch. They can cross reference just about anything.

  7. #7
    Join Date
    Dec 2012
    Location
    Sacramento
    Posts
    3
    Yeah 3 two stage heat exchanger set up, I researched the T775 and I can get an expansion module, I've actually used this controller on a boiler system, don't know why I didn't think of it!

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