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Dyna glo 30000 dual fuel vent free wall,floor heater making a whistling noise. Any help guys?

Ohiobuck
Ohiobuck Member Posts: 2
in THE MAIN WALL
Please help guys. Have a Dyna glo wall floor heater installed today.connected to natural gas and Has a external regulater at 6" wc and connected thru 1/2 flex hose. Heater works great on high but the minute I put it below 2 or below on the dial it starts making a whistling noise. Heater is brand new so I wouldn't think the air inlet for orifice would be dirty. Any help guys? Thank you much for any info.

Comments

  • kcopp
    kcopp Member Posts: 4,462
    What is the manifold pressure on low fire?
    Just as a FWIW... Vent free heaters are terrible. I never install them. Way too much of a air quality risk.
  • Steamhead
    Steamhead Member Posts: 17,210
    kcopp said:

    What is the manifold pressure on low fire?
    Just as a FWIW... Vent free heaters are terrible. I never install them. Way too much of a air quality risk.

    Not to mention a carbon monoxide risk- for that reason, we don't touch them.
    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting
  • ratio
    ratio Member Posts: 3,747
    I had a job with several unit heaters that whistled in the flex line. IIRC they were slightly undersized for the load but no one wanted to pay to replace them. I lessened the whistling by bending & stretching the flex line slightly—just enough to alter the internal flow away from the resonance.

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