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  1. #1
    Join Date
    Jan 2001
    Posts
    771
    working on a commercial weil mcclain boiler. it is to be set at positive .2 at breech damper. my question is what should the reading on smoke pipe between breech and draft regulator be set at(what should i set draft regulator at??)

  2. #2
    Join Date
    Nov 2003
    Location
    Boston
    Posts
    600
    H,
    I may be misreading you post, but,
    Your question implies that you are not a burner tech (neither am I).
    If you have to ask a qustion like that than you should not make any adjustments to the burner or breeching, could be very dangerous.

    If your legit, try posting over
    here

    powerhead

    [Edited by powerhead on 01-17-2006 at 11:20 AM]
    Edited by powerhead on more than one occasion

  3. #3
    Join Date
    Apr 2005
    Location
    where the beer flows like wine
    Posts
    2,871
    Originally posted by hvac17011
    working on a commercial weil mcclain boiler. it is to be set at positive .2 at breech damper. my question is what should the reading on smoke pipe between breech and draft regulator be set at(what should i set draft regulator at??)
    size and fuel type?

  4. #4
    Join Date
    Jan 2004
    Location
    PA
    Posts
    68,776
    You'll find that info in the install manual.

    Keep in mind, that after the breech damper, the flue pipe draft is no different then a neg pressure boiler.



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    How many times must one fix something before it is fixed?

  5. #5
    Join Date
    Dec 2004
    Location
    Mid-west
    Posts
    567
    Go to the Bacharch website they have alot of combustion testing info

  6. #6
    Join Date
    Nov 2005
    Location
    Texas
    Posts
    1,633

    Go to the Bacharch website they have alot of combustion testing info

    Like onetime said.

    You have to look at the whole picture when you start
    adjusting air/fuel ratios on burners. It's the difference
    between a clean flame, and CO.

    You need to look at stack temp, and combustion gas
    composition while making adjustments. Get the whole
    picture BEFORE you make adjustments.

    Regards......

  7. #7
    Join Date
    Nov 2003
    Location
    rhode island
    Posts
    39
    draft at damper breeching ,,taken at 1/4 in plug should be .01 positive ,in stack ideally should be .04 negative, positive pressure should be abtained by damper closure ,,,,very inportant CHECK overfire pressure dont exceed factory recomendations

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