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  1. #1
    Join Date
    May 2012
    Location
    Upper Michigan
    Posts
    3,589

    Just started using combustion analyzer

    Our company bought one a couple years ago and I just started to mess with it. I'm just looking for some info on what I'm looking at and what's good or bad as far as readings. I couldn't find anything on the manual for it that helped. Any pointers or links pls, I really want to know wtf and do the best job I can.


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  2. #2
    Join Date
    Dec 2002
    Location
    Arizona
    Posts
    4,422
    Make your expertise uniquely valuable.

    Make your influence uniquely far-reaching.

  3. #3
    Join Date
    Dec 2002
    Location
    Arizona
    Posts
    4,422
    Go here to download a combustion guide from TruTech.
    http://www.trutechtools.com/CombustionGuide
    Make your expertise uniquely valuable.

    Make your influence uniquely far-reaching.

  4. #4
    Join Date
    May 2012
    Location
    Upper Michigan
    Posts
    3,589
    Thanks


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  5. #5
    Join Date
    Jul 2009
    Location
    Columbia, MD
    Posts
    4,412
    o2 between 6%-9%
    co under 100ppm and stable
    flue temp on induced draft furnaces 302*-402* (80% furnaces)
    90% furnaces flue temp under 135*

    do not adjust gas pressure if you can not control draft.

    once you learn how to control draft you may adjust gas pressure.

    attend Jim Davis' class. He is the man!

  6. #6
    Join Date
    May 2012
    Location
    Upper Michigan
    Posts
    3,589
    Quote Originally Posted by gravity View Post
    o2 between 6%-9%
    co under 100ppm and stable
    flue temp on induced draft furnaces 302*-402* (80% furnaces)
    90% furnaces flue temp under 135*

    do not adjust gas pressure if you can not control draft.

    once you learn how to control draft you may adjust gas pressure.

    attend Jim Davis' class. He is the man!
    Thanks, co ppm is that always below 100, I worked on a pulse today that was really high on startup but stabilized later on. In thinking I had a bad reading or my own error.


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  7. #7
    Join Date
    Jul 2009
    Location
    Columbia, MD
    Posts
    4,412
    ive had co rise up to 600-800ppm on startup. as it runs it should stabilize under 100.

    co should stay stable

    example; after running 5 mins co is 12ppm. at 6mins it is now 13ppm. at 8mins its at 16ppm.
    this is an example of rising CO which is very very dangerous. you will see this mostly on exhaust pipes with draft diverters. this is a sign that it is not venting correctly.

    if you take Jim Davis' class you will learn a lot about these problems and you will learn how to correct them

  8. #8
    Join Date
    Jul 2009
    Location
    Columbia, MD
    Posts
    4,412
    it is normal for CO to spike on startup

  9. #9
    Join Date
    Jul 2009
    Location
    Columbia, MD
    Posts
    4,412
    time to watch the debate. hopefully i have helped and will be back tomorrow.

  10. #10
    Join Date
    May 2012
    Location
    Upper Michigan
    Posts
    3,589
    Quote Originally Posted by gravity View Post
    time to watch the debate. hopefully i have helped and will be back tomorrow.
    Yes and thanks, I will look into the classes, are they online or something?


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  11. #11
    Join Date
    Feb 2010
    Location
    In a boiler room
    Posts
    7,186
    Quote Originally Posted by Joehvac25 View Post
    Yes and thanks, I will look into the classes, are they online or something?


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    http://www.nationalcomfortinstitute....ontraining.cfm

    The most valuable training I have ever taken, bar none.

  12. #12
    Join Date
    May 2012
    Location
    Upper Michigan
    Posts
    3,589
    Quote Originally Posted by gravity View Post
    o2 between 6%-9%
    co under 100ppm and stable
    flue temp on induced draft furnaces 302*-402* (80% furnaces)
    90% furnaces flue temp under 135*

    do not adjust gas pressure if you can not control draft.

    once you learn how to control draft you may adjust gas pressure.

    attend Jim Davis' class. He is the man!
    What kind of numbers will make me start adjusting gas pressure, or alarm me that something is wrong.


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  13. #13
    Join Date
    Jul 2009
    Location
    Columbia, MD
    Posts
    4,412
    If your CO is above 100 you have a problem
    if you have a unstable CO you have a serious problem.

    If you start to overfire a furnace your CO will go over 100, O2 goes under 6%, or you will exceed the delta t or flue temps.

    If you cannot control draft then you shouldn't adjust gas pressure.

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