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underfireing buderus

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RoosterBoy
RoosterBoy Member Posts: 459
in THE MAIN WALL
has anyone had a problem underfireing a buderus g115 boiler
by 5 to 10% I will be using a power Venter so I should not have the problem of expelling the gasses of combustion
right? will condensing be an issue?

thanks
John

Comments

  • Big Ed
    Big Ed Member Posts: 1,117
    But .......

    Why would you want to ?The G115 fire is not what I thought of as large......Watch the stack temperature.....
  • RoosterBoy
    RoosterBoy Member Posts: 459


    hi ed because my load is 83,000 btu I don't want to have short cycling of my burner and i perfer not to go with another brand boiler i have my eye set on the buderus
    thanks
  • Steve Eayrs
    Steve Eayrs Member Posts: 421
    may end up with problems with

    condensate, or other, by underfiring. You should not have short cycle problems with that big of a heat load, and you also need to include the dhw load, which could easily be bigger than this.

    Using the right controls, w/ dhw priority, and/or optimizing the burner run cycle, outdoor reset, etc. (like Tekmar controls or Buderus controls), will help too.


    Steve
  • Nron_9
    Nron_9 Member Posts: 237
    short cycle

    If You want to extend the cycle length of the boiler than add a storage tank to the system , Ziggy has the digrams on his heating disk that will allow you to size 1 and how it will affect cycle lenth as per how large a tank you get .
    Or look at the vitola boiler instead they have a much larger storage capacity to help reduce cycles
  • Nron_9
    Nron_9 Member Posts: 237
    short cycle

    If You want to extend the cycle length of the boiler than add a storage tank to the system , Ziggy has the digrams on his heating disk that will allow you to size 1 and how it will affect cycle lenth as per how large a tank you get .
    Or look at the vitola boiler instead they have a much larger storage capacity to help reduce cycles they start at 18.5 gal storage capacity
  • RoosterBoy
    RoosterBoy Member Posts: 459


    i dont use indirect hotwater will i still be ok with my load and that boiler g115 model 28 my load is 83,000 btu
    thanks
  • kevin coppinger_4
    kevin coppinger_4 Member Posts: 2,124
    I looked into....

    this w/ my boiler....frowned upon by Buderus. You can UPfire a 115-21...10%. Are you doing a power venter or the direct /balanced flue setup...kpc

    To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"
  • Robert O'Connor_6
    Robert O'Connor_6 Member Posts: 299
    what do you

    have for heat emitters?

    Doesn't matter anyway your so close to the rating . I would leave it alone.

    regards,

    Robert

    ME
  • RoosterBoy
    RoosterBoy Member Posts: 459


    i am power venting
  • dave connors
    dave connors Member Posts: 30
    watch the stack temperature

    Removing baffles will increase stack temp. but you will loose efficiency. Call 1-800-BUDERUS.
  • Big Ed
    Big Ed Member Posts: 1,117
    I Agree...

    ....your right there with the G115-28. Why over engineer the system. I would recommend the out door reset ....Not a great fan with a power venter unless no other option. I would direct vent .Alot less to go wrong with......... other then the Riello post purge control to worry about. I figured they have them ironed out by now...
  • Bob Murray
    Bob Murray Member Posts: 20
    Why on earth.......

    would you want to use a power venter when the Riello BF3 is available??? Think about it....no fan to clean, no motor to go bad,etc., etc....
This discussion has been closed.

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