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when i open ash pan door while stove is on flame drops and smokes, why?

Post in 'The Pellet Mill - Pellet and Multifuel Stoves' started by indoorairpro, Sep 28, 2013.

  1. indoorairpro

    indoorairpro Member

    Joined:
    Jan 27, 2011
    Messages:
    8
    Loc:
    NE PA
    i have a kozyheat olivia, fresh air intake is in the chamber that holds the ash pan and FA is pulled up through holes in bottom of burn pot so in theory opening ash pan door should do nothing other then provide more oxygen to burn pot since there is much less resistance pulling from room then there is pulling through 2" fresh air intake pipe. yet the exact oppisite happens when i open the ash pan door. So what piece of this puzzle am i missing?

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  2. jtakeman

    jtakeman Minister of Fire

    Joined:
    Dec 30, 2008
    Messages:
    13,583
    Loc:
    Northwestern CT.
    I think its do to area. The small 2" opening(which probably has a flapper valve) isn't a large volume. When you open that big door it is too large an area for the small cfm motor. You'll probably notice in the manual it should have something about opening either door.

    We open the top door to quickly swipe the burnpot, Then quickly close the door. But not the ash door and try to dump the ashes. Best to shut down the stove, let it cool to empty the ash pan
  3. ad356

    ad356 Member

    Joined:
    Dec 25, 2009
    Messages:
    141
    Loc:
    north java, ny
    i empty my harman all of the time while its running, i use glove mits and i turn the stove down to low idle when i clean it but i close the door while i am taking the ashes out. not much ash is going to fall land in the bottom of the stove for those 5 minutes it takes to dump it. i do a through cleaning 1/2 way through the season. then again its a harman
  4. Stevekng

    Stevekng Feeling the Heat

    Joined:
    Oct 21, 2007
    Messages:
    324
    Loc:
    Central Maine
    Wouldn't opening the ash pan door while the stove is in operation result in the loss of negative pressure?
  5. tsmith

    tsmith Minister of Fire

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    Sep 13, 2009
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    748
    Loc:
    Kutztown, PA
    Yes, that is your problem.
  6. Stevekng

    Stevekng Feeling the Heat

    Joined:
    Oct 21, 2007
    Messages:
    324
    Loc:
    Central Maine
    By "your" I guess you mean Indoorairpro. I never open the ash pan doors(I have three stoves) while they are running.
  7. SmokeyTheBear

    SmokeyTheBear Minister of Fire

    Joined:
    Nov 10, 2008
    Messages:
    12,059
    Loc:
    Standish, ME
    It all depends upon what the stove is, some have the ash bin isolated from the area around the burn pot, on those stove opening the ash pan door acts the same as opening any damper. On those stoves that have the ash pan area open to the area around the burn pot opening the ash pan door acts as a huge burn pot air bypass and a loss of proper airflow and pressure in the firebox, this results in a very bad burn and even smoke in the room (sometimes).
  8. ad356

    ad356 Member

    Joined:
    Dec 25, 2009
    Messages:
    141
    Loc:
    north java, ny
    i open the ash pan door, remove the ash pan and close the door. its open for less then a minute. no big deal, and the stove stops feeding pellets as soon as the negetive pressure lost, and restarts feeding pellets once the door is shut. harmans are a great design, one of the lowest maintence stoves on the market, not maintence free but close

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