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Proper Pressure Settings for Residential Steam Boiler

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ups3341
ups3341 Member Posts: 2
in Strictly Steam
I got Burnham SIN6LNI-LE2 Steam Boiler, i found out it When the thermostat calls for heat, the boiler has been running for 25-35 minutes. Then, it shuts off. My 3 floor doesn't have heat or got some. I think pressuretrol isn't setup correct because i know the contractor touch few times, at beginning the heat turned on for more than an hour,,


Any help is greatly appreciated! Many thanks.

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  • Steamhead
    Steamhead Member Posts: 16,868
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    That's way too high. Residential steam should never need more than about a pound.

    If the steam does not distribute properly, there are plenty of Steam Guys on here who can help you. Where are you located?
    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting
  • EdTheHeaterMan
    EdTheHeaterMan Member Posts: 7,915
    edited February 12
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    The lowest pressure that is needed to get the steam to the radiators. The Empire State building only needs 2 PSI. How far away from the boiler is your farthest radiator, compared to 100+ floors of the ESB?

    Is this a one pipe steam system? Are all your air vents working? You need to get this book... We Got Steam Heat Available in the store on this site or on Amazon.com

    Edward Young Retired

    After you make that expensive repair and you still have the same problem, What will you check next?

    bburd
  • ethicalpaul
    ethicalpaul Member Posts: 5,707
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    It should never need more than an ounce. But the pressure controls don't really let you set it that low.
    NJ Steam Homeowner. See my sight glass boiler videos: https://bit.ly/3sZW1el
  • Waher
    Waher Member Posts: 252
    edited February 12
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    Adjust the settings with the two small screws on the top left side of the grey pressuretrol box.

    Set the diff to 1 and the main to 1.5 for a cut-in pressure of 0.5 PSI and a cut-out of 1.5 PSI.
    Without a low pressure gauge you won't be able to tell if the pressuretrol is accurate to those settings, but it will get you in the ballpark.
    ethicalpaul
  • ChrisJ
    ChrisJ Member Posts: 15,731
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    This is how I have mine setup, it's not identical but gives an idea.
    I think this was as low as I could get mine without it having trouble resetting.



    Single pipe quasi-vapor system. Typical operating pressure 0.14 - 0.43 oz. EcoSteam ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment
    ethicalpaul
  • Waher
    Waher Member Posts: 252
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    This is mine set to operate at .05 to 1.5psi according to the actual readings of a 0-3 PSI gauge to give you an idea how off the calibration is from the factory compared to the markings on the control.
    ethicalpaul
  • ups3341
    ups3341 Member Posts: 2
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    Thank you for everyone's advise, I put main 2 and different 1.5 is working..

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