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Viessmann HX warranty replacement

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Alan (California Radiant) Forbes
Alan (California Radiant) Forbes Member Posts: 4,022
edited July 2019 in THE MAIN WALL
This was our first one and it went very well. Viessmann did an excellent job providing all the parts and tools necessary along with step-by-step instructions.

It took Loretta and I 3 hrs. from start to finish. The hardest part was removing the flue.

One down, six to go.












8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour

Two btu per sq ft for degree difference for a slab

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  • HomerJSmith
    HomerJSmith Member Posts: 2,448
    edited July 2019
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    Tell me, inquiring minds want to know. That in the heck went wrong and why and what model. I guess replacing the HX is one way to clean it.

    Whaaaat? They gave you a Viessmann tool kit, too.
  • Alan (California Radiant) Forbes
    Alan (California Radiant) Forbes Member Posts: 4,022
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    It's a voluntary recall by Viessmann.

    https://forum.heatinghelp.com/discussion/170189/viessmann-vitodens-hx-recall
    8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour

    Two btu per sq ft for degree difference for a slab
  • HomerJSmith
    HomerJSmith Member Posts: 2,448
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    Thanks, I had't seen that.
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 15,577
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    After doing the first one I am sure you will get speedier on the rest. Dosen't look like too bad of a job
  • GW
    GW Member Posts: 4,696
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    We have a box sitting in our office. Was the tool kit in a different box? Am I supposed to ask for that?
    Gary Wilson
    Wilson Services, Inc
    Northampton, MA
    gary@wilsonph.com
  • Alan (California Radiant) Forbes
    Alan (California Radiant) Forbes Member Posts: 4,022
    edited July 2019
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    The tool kit is a separate item. Standard torx bits, but there's an extended bit that unscrews the nuts on the back wall that holds the HX in place that's very helpful.

    The tag on my invoice says part #V9537070.
    8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour

    Two btu per sq ft for degree difference for a slab
  • Henry
    Henry Member Posts: 998
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    Make sure to clean that European P trap every year. It can easily block and flood the combustion chamber.
  • Alan (California Radiant) Forbes
    Alan (California Radiant) Forbes Member Posts: 4,022
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    They give you a new, different trap to replace along with the HX. And yes, there was debris at the bottom and a great idea to clean it out periodically.

    Just remember to fill it up again with water before you turn on the boiler so flue gasses don't come spilling out at the drain.
    8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour

    Two btu per sq ft for degree difference for a slab
    Henry

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