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Residential Steam Boiler

Bob C._2
Bob C._2 Member Posts: 33
in THE MAIN WALL
Residential Steam Boiler replacement-banging

Pressure 2 psi

1-1/4" hartford loop

What are main causes of banging?

has new main air vent!

What are best ways to isolate -fix

This is a single pipe system

Comments

  • nugs
    nugs Member Posts: 77
    Banging

    For starters I suspect that 2lbs. is way more pressure than you should be running but.... I have not had the chance to crawl around your basement and inspect the piping either but normally residential steam will run about 1/2 a pound so try cranking it down and see what you get.  Banging is caused by steam coming in contact with condensate (water) and flashing that water back into steam so too much pressure can be an issue here as well as plugged returns. 
  • STEVEusaPA
    STEVEusaPA Member Posts: 6,505
    More questions?..

    Did you just replace the boiler and now you have banging? At what part of the heating cycle do you hear the banging? Are your main(s) straight and properly pitched? Are you sure you have the right main vent?

    There was an error rendering this rich post.

  • BobC
    BobC Member Posts: 5,512
    Skimming?

    What does the water in the sight glass look like? Is it clean and does it not bounce more than +/- 1/4" while steaming?



    If the water is dirty or bouncing excessively the boiler may need to be skimmed.



    Bob
    Smith G8-3 with EZ Gas @ 90,000 BTU, Single pipe steam
    Vaporstat with a 12oz cut-out and 4oz cut-in
    3PSI gauge
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