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Flame color on Williams gas wall heater / Flame burst

iOne
iOne Member Posts: 4
in Gas Heating
What could be causing this? This is from a 24 unit apartment, and this one heater has a more yellow flame:


And a bit of a flame burst when cold:
https://photos.app.goo.gl/aTYzAYiDF1u66Yvr7

Comments

  • Jamie Hall
    Jamie Hall Member Posts: 25,950
    Dust or dirt in the manifold or feed to that burner.
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • pecmsg
    pecmsg Member Posts: 5,960
    Get a combustion analyzer and the training to use it.

    In the meantime order a Low-Level CO detector.
    iOne
  • iOne
    iOne Member Posts: 4
    pecmsg said:

    Get a combustion analyzer and the training to use it. Low-Level CO detector.

    Got the low level CO detector, but will be referring out to a specialist beyond that.

    A comparable unit in the same building, same age of Williams Monterey wall furnace, burns like this:
    https://photos.app.goo.gl/j4Sn33SD1gdaA67H9

    The manual says straight up there's no adjustment for the combustion air mixture. Is that really true? Is it possible a flue issue could cause the flame color?
  • ratio
    ratio Member Posts: 3,958
    An ultrasound humidifier will cause the flames to look odd. Because it mechanically atomizers the water, any minerals that are present end up in the air as well.

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