Results 1 to 8 of 8
  1. #1
    Jon mackay's Avatar
    Jon mackay Guest

    Default Oil Boiler Barometric Damper

    When looking at the barometric damper on an oil fired boiler or furnace, how would you know if the counter weight is adjusted properly?

    I will make sure that it swings freely and is not obstructed, but usually I will see the damper open slightly when the system fires.

    I was not sure if the colder weather (25-30 Deg. F) would stop it from opening when firing.

    This particular unit had an obstruction at the bottom that prevents it from swinging out but it looked as if it were a part of the vent.

    Crown Boiler mfr. in 1997
    Model # BD 120 LC
    120,000 BTU

    Any info would be helpful..

    Similar Threads:
    ***IMPORTANT*** You Need To Register To View Images ***IMPORTANT*** You Need To Register To View Images
    NHIE Practice Exam

  2. #2
    Join Date
    Dec 2008
    Location
    Maryland
    Posts
    2,778

    Default Re: Oil Boiler Barometric Damper

    Blow on it or very sight tap on bottom.
    Exterior temp should have no effect on damper operation after unit is fired and running.
    Yes there is a stop at bottom.


  3. #3
    James Duffin's Avatar
    James Duffin Guest

    Default Re: Oil Boiler Barometric Damper

    The only way to tell is with a draft guage inserted in the flue. Just because it moves freely does not mean it is adjusted properly Typically draft measurements around -0.02" w.c. are considered "low", and around-0.06" w.c. are "high" draft levels...... but not always.


  4. #4
    Join Date
    Jul 2008
    Location
    Snowbird (this means I'm retired and migrate between locations), FL/MI
    Posts
    4,086

    Default Re: Oil Boiler Barometric Damper

    Combustion analizer, draft gauge measurements from the chamber and breach, inspection, cleaning/adjustments as necessary, and testing.


  5. #5
    Join Date
    Mar 2007
    Location
    Succasunna NJ
    Posts
    574

    Default Re: Oil Boiler Barometric Damper

    First make sure the weight is installed on the proper side
    V- vertical
    H- horizontal.

    Darren www.aboutthehouseinspections.com
    'Whizzing & pasting & pooting through the day (Ronnie helping Kenny helping burn his poots away!) (FZ)

  6. #6
    Join Date
    Mar 2007
    Location
    Iron Mountain, MI
    Posts
    41

    Default Re: Oil Boiler Barometric Damper

    Why do boilers need barometric dampers, and not furnaces, water heaters, etc? What is the function of the damper? What if a direct vent boiler has no damper?


  7. #7
    Join Date
    Mar 2007
    Location
    Succasunna NJ
    Posts
    574

    Default Re: Oil Boiler Barometric Damper

    It's not the boiler; it's if the appliance is oil fired.

    Last edited by Darren Miller; 02-04-2011 at 04:03 AM.
    Darren www.aboutthehouseinspections.com
    'Whizzing & pasting & pooting through the day (Ronnie helping Kenny helping burn his poots away!) (FZ)

  8. #8
    Join Date
    Jul 2008
    Location
    Snowbird (this means I'm retired and migrate between locations), FL/MI
    Posts
    4,086

    Default Re: Oil Boiler Barometric Damper

    Joe A,

    Fuel oil fired appliances utilize one-way dampers to assist in draft, and avoid run-away temps in the vent or chimney from the combustion chamber running away at the burner. Most domestic/residential fuel oil fired furnaces, water heaters, boilers, etc. have them.


    Should the wind be blowing or pressure differential the barometric damper properly adjusted will close, avoiding spillage.


    Gas fired appliances may be draft hood (cat I) which functions as a two-way or allows spillage - or if fitted with a baro damper it too would be two way. You may also have a manifold or a firing sequencer if there are multiple appliances.


    Baromeric dampers are draft assistance/modulating devices.


    Other solid fuel devices may also have a damper, it may or may not be automatic.

    That's not the end-all, but a simplistic generalization.


    HTH


Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •