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  1. #1
    Join Date
    Sep 2005
    Posts
    73
    Here is a question I have.

    I have a WM Ultra 230. On average, it takes about 5 minutes to reach the set point for the water temp from a cold start. I am just trying to figure out if that is normal or too long?

  2. #2
    Join Date
    Oct 2005
    Posts
    922

    Use

    What are you using this for?

  3. #3
    Join Date
    Sep 2005
    Posts
    73
    Both space heating and DHW. Unit feeds a coil in a variable speed air handlder. DHW is a ultra plus 60.

  4. #4
    Join Date
    Oct 2005
    Posts
    922

    Do you think this is long or two short

    What are the settings and outside temp?

  5. #5
    Join Date
    Oct 2005
    Posts
    922

    High low set points

    What are your settings and what is the outside temperature. Five min at this point does not sound bad?

  6. #6
    Join Date
    Sep 2005
    Posts
    73
    Ranges are as follows: 70 degree ODT = 140 degree water, 20 degree ODT = 180 degree water. Usuallay the cold start is around 110 degrees and takes about 4-5 minutes to get to 156 degrees.

  7. #7
    Join Date
    Oct 2005
    Posts
    922

    Fourty six

    More then ten degrees a min I would think that is good

  8. #8
    Join Date
    Oct 2005
    Posts
    922

    fourty six

    11.5 degrees per minute or 9.2 degrees per minute sounds ok from what you have said 46 degrees 4-5 min sounds reasonable even nice from a cold idling start up.

  9. #9
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,741
    For heat, it sounds alittle over sized. But that could be low flow through the hydro coil, or you have your cfm set low.

    The 230 can modulate down to 46,000btu input. And hydro's don't hold alot of water, so you get a quick temp rise.

    If the temp rises too fast, the Ultra will lock out and give you a code 30.

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  10. #10
    Join Date
    Sep 2005
    Posts
    73
    Have not had that problem. I lowered the blower speed on the ultra and changed the off differential to 16 degrees, this stopped all short cycling of the boiler and it runs like a charm know. The boiler will stay fired and not short cycle for an entire heat call how ever long it may be.

  11. #11
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,741
    Cool.

    Do you have the Control Addendum instructions.
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  12. #12
    Join Date
    Sep 2005
    Posts
    73
    Yes, that is where I learned to make all of the adjustments.

  13. #13
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,741
    Kinda though you did, since none of those settings is in the normal control instructions.

    Without giving step by step instructions.

    You know that setting that says don't set below 140.

    Set it to 130, as long as you don't change the other setting, your DHW won't lag.

    I have some as low as 120, on 40 gal indirects.


    PS: If you have 0011 circs, and they fail under warranty, ask your installer about switching to 0014 circs under warranty.
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