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Viessmann Vitodents actual heating output

Tarpan
Tarpan Member Posts: 15
Any Viessmann specialists here?
Is there a way to see boiler actual/current heating output at? I have a 100 kBTU boiler. I found a setting in level 2 config which limits max output to 73%, which is more than enough for my 4 bedroom house.

Out of curiosity, I like to see what is the actual heating output at any given moment. In Trinitiy Ti150 boiler I put in my old house it was very easy to see - the screen been rotating a few numbers and one of them was the "gas valve" (100-240 range). So if I see 240, I knew it puffing at the full speed (which happened only in DHW mode).

I am curious to see how close my Viessmann come to it's heating limits.

PS. Viessmann Vitodents 200 B2HA

Comments

  • sunlight33
    sunlight33 Member Posts: 235
    I don't think this model has this feature.
    Now, when you said you found a setting in level 2, was it address 6F?
  • Jamie Hall
    Jamie Hall Member Posts: 15,373
    It's actually not all that hard -- with the right measuring devices. What you need is the delta T across the boiler (inlet to outlet) -- which is easy to get -- and the actual flow rate, which is not so simple, but accurate flow measuring devices do exist. Then just use the standard hydronic formula, and that is your real output.
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
    heathead
  • Tarpan
    Tarpan Member Posts: 15
    Jamie Hall,
    LOL
    PS. That was a joke , right?
  • Tarpan
    Tarpan Member Posts: 15

    I don't think this model has this feature.
    Now, when you said you found a setting in level 2, was it address 6F?

    73, I believe.
  • Jamie Hall
    Jamie Hall Member Posts: 15,373
    No, I understood you to be interested in the actual output of the boiler to the heating system. That will give you the real world output.
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • sunlight33
    sunlight33 Member Posts: 235
    Tarpan said:

    I don't think this model has this feature.
    Now, when you said you found a setting in level 2, was it address 6F?

    73, I believe.
    I think in level 2 you only control the max output for DHW production. For spacing heating you have to press some buttons on the control panel to bring up that option.

  • Often wrong, never in doubt.
  • Tarpan
    Tarpan Member Posts: 15
    Jamie Hall,
    This will NOT give the actual output of the system. This is no more than an averaged guestimate.

    *This

    It's actually not all that hard -- with the right measuring devices. What you need is the delta T across the boiler (inlet to outlet) -- which is easy to get -- and the actual flow rate, which is not so simple, but accurate flow measuring devices do exist. Then just use the standard hydronic formula, and that is your real output.

  • Tarpan
    Tarpan Member Posts: 15
    Alan,
    This register is for setting up the max output. I am not sure what it info has to do with my question.


  • My boiler has a screen that shows a percentage output.

    Often wrong, never in doubt.
  • PerryHolzman
    PerryHolzman Member Posts: 234
    Which model and generation of Vitodens? My understanding is that some of them can provide that information, and some cannot. On the original Vitodens 200 introduced in 2003 (current one is 3 model revisions since then) I believe that I can access that information only be going into the security coded programming/troubleshooting section.

    Perry
  • PerryHolzman
    PerryHolzman Member Posts: 234
    edited February 1

    My boiler has a screen that shows a percentage output.

    Alan: Just curious if you know why your boiler at 100% firing rate? Which boiler is it and why is it not modulating?

    Perry
  • GW
    GW Member Posts: 3,991
    What’s the actaul model number? When you type 100,000 btu I’m thinking you have a 26kw? I was on a B2HB 26 the other day, computer maxes out at 75%. The same computer unit for the 26 and 35. I wish their computer logic was a little finer  


    Gary Wilson
    Wilson Services, Inc
    Northampton, MA
    [email protected]
  • @PerryHolzman: That's an image from the Viessmann service manual, but I can imagine 100% on a closely sized boiler on a design day or a continuous draw of DHW.
    Often wrong, never in doubt.
  • GW
    GW Member Posts: 3,991
    Perry you’re on a modulation binge😀. If the system has been down for a while and the house cooled off, it will go max EASILY. You gotta get out to the jobs more often 
    Gary Wilson
    Wilson Services, Inc
    Northampton, MA
    [email protected]
  • Tarpan
    Tarpan Member Posts: 15

    My boiler has a screen that shows a percentage output.

    Nice!
    Mine Doesn't do that.
    B2HA model
  • Tarpan
    Tarpan Member Posts: 15

    Which model and generation of Vitodens?

    As I said, Viessmann Vitodents 200 B2HA
    I believe "A" stands for 1st gen

    I believe that I can access that information only be going into the security coded programming/troubleshooting section.
    Perry

    Any idea where? What register/address?
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