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Shocking Of Boiler Sections

steve curran
steve curran Member Posts: 6
in THE MAIN WALL
Where I Work All Our Boilers Are Gas Fired Hot Water With Oil Back Up. The Last Few Years A Cast Iron Section Will Crack. Any Answers Out There What Will Cause This. Is This Cause By Shocking Of Low Water Return Temperature. Looking For Solutions For this Problem. Steve Curran

Comments

  • ed wallace
    ed wallace Member Posts: 1,613
    cracked sections

    sounds like low return temps you need to install a bypass between the supply and return the owner of local supply house recommends a 3/4 line between supply and return with ball valve to throtle amount of water thru bypass
  • tim from Reed Wright
    tim from Reed Wright Member Posts: 113


    read HB Smith problems, postings
  • Boilerpro
    Boilerpro Member Posts: 410
    Are they staged fired...

    with each boiler having it own circulator and piped Primary/ Secondary? This popular installation configuration leads to both cold shock from cold system return temps, and hot shock whan a cold boiler is staged on and the system is already hot. Been replacing alot of cracked boilers due to this piping layout.

    Boilerpro
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