Propane heater with yellow flames and roars

julesos4u Posted By julesos4u, Jan 24, 2013 at 1:58 PM

  1. julesos4u

    julesos4u
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    Nov 17, 2012
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    We installed a comfort glow 50k vented propane heater for my mom. (thanks for all the help with the installation questions). The other day she said it started to roar...make a lot of noise (it does not have a fan). so she turned it down without looking at the flame and it seemed OK. I went up yesterday and there was a fair bit of yellow/orange flames. I took the burner out and cleaned it and the orifice. But neither. really seemed that dirty. The combustion area seem good....no soot. Today it happened again and this time she looked at it and said there was a lot of yellow/orange flames. She is using a 120 gal tank and it is at 30%. Up to this point (2 months) it seemed to be working OK. Because we bought it used I am wondering if I should change to orifice just to be assured it is the right size. It has been in the single digits here if weather can be a factor. She did change propane tanks a month or so ago but has had a fill with the new tank. Thanks for all your help. Julie
     
  2. DAKSY

    DAKSY
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    Dec 2, 2008
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    The "roar" happens because some of that escaping LP ignites at the air shutter, before all of it gets thru the burner to the burner ports. This USUALLY occurs when there's a misalignment between the burner orifice & the burner tube. The air shutter is usually located just past the point where the orifice enters the burner & any misalignment will allow the gas to shoot out the side of the air shutter, where it can ignite once it comes into contact with the pilot flame. You have to make sure that the orifice points directly into the middle of the burner tube. Hope this helps. If you a need more detailed explanation, start a conversation with me...
     
  3. Heatsource

    Heatsource
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    Dec 19, 2011
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    Like Bob said- it sounds like "fire in the hole"
    sometimes slightly closing the air fuel shutter will eliminate this (once you are sure there is no mis-alignment...)
     
  4. julesos4u

    julesos4u
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    Nov 17, 2012
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  5. DAKSY

    DAKSY
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    I can't open that link, Julie, but the air shutter is usually within the first inch of the burner tube. It may be just an opening & may not be adjustable, if the unit is DEDICATED to propane & can't be converted to NG.
     
  6. julesos4u

    julesos4u
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    Nov 17, 2012
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    I check the alignment and it seems good and the bracket the orifice gets mounted to is very rigid so it would be unlikely that it has moved. I would say that this is a dedicated propane as there is nothing in the owners manual about converting. I had the orifice checked and it is the right size. I am going to reinstall the orifice. Anything else to consider? Thanks again. Julie
     
  7. julesos4u

    julesos4u
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    Nov 17, 2012
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    When I went to reinstall the orifice I realized that the heater was not level...it sat about 1/2 inch lower on the orifice end. Any chance that could be my problem? We did level it. Julie
     
  8. DAKSY

    DAKSY
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    Dec 2, 2008
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    Possibly. That may have caused the burner/orifice misalignment... Fire it up!
     

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