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Buderus 2109 again...

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kcopp
kcopp Member Posts: 4,440
From time to time I see a post here about needed a replacement for a HS2109 boiler control.
Now I have an issue w/ the one and only one if these I have ever installed.
I must say I am quite dissappointed has no direct replacement for this other than the 2107.

IF you use the 2107 do you need to use the outdoor reset feature?
Getting a sensor through to the outside on this building is a difficult undertaking and is not needed.

Thanks. kcopp

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  • Robert O'Brien
    Robert O'Brien Member Posts: 3,541
    edited May 2017
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    Why spend the money on a 2107 and not use the ODR? Just use a 7224, Aquasmart or Hydrostat.
    To learn more about this professional, click here to visit their ad in Find A Contractor.
    Ironman
  • kcopp
    kcopp Member Posts: 4,440
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    Thanks..
    Faster cleaner change out.
    Lot less to Rewire.
    No purging the entire system....its a big complex system.
  • Robert O'Brien
    Robert O'Brien Member Posts: 3,541
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    It will work without outdoor sensor to answer your question.
    To learn more about this professional, click here to visit their ad in Find A Contractor.
  • kcopp
    kcopp Member Posts: 4,440
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    Thanks much.
  • HVACNUT
    HVACNUT Member Posts: 5,861
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    Regardless, you need to change the well. If Hydrostat, use their well if you want LWCO protection.
  • kcopp
    kcopp Member Posts: 4,440
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    already has a LWCO
  • HVACNUT
    HVACNUT Member Posts: 5,861
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    > @kcopp said:
    > already has a LWCO

    >>then use any 3/4" brass well. Not sure, but you might need a long well to rise above Buderus Jacket.