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viessmann

The Viessmann Group is a German manufacturer of heating, industrial, and refrigeration systems headquartered in Allendorf (Eder), Germany. With 23 production companies in 12 countries, distribution companies and representative offices in 74 countries and 120 sales offices throughout the world, Viessmann is international in its orientation. 55 percent of turnover is generated abroad. Since January 2018, the company is led by Martin Vießmann (Chairman of the Executive Board), Maximilian Viessmann (Co-CEO) and Joachim Janssen (Co-CEO).The company was founded in Hof an der Saale in 1917 by Johann Viessmann, and has been family owned for four generations. As of 2019, the company employs 12,300 people and reports annual sales of € 2.65 billion.

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  1. G

    Viessmann 111W storage combi "Crinkly/corroding hoses" Your advise/experience

    Hi I'm new on this forum so my apology if this is not the correct etiquette. Earlier I thought I was posting this question on a forum but think I actually "started a conversation" with Scott) I am looking for advice on Viessman 111W corroding hoses. Background: I currently have a 19 year old...
  2. M

    Expansion vessel change on a viessmann 200wv

    hi guys. I’m after some advice on replacing a viessmann expansion vessel if anyone has any? I’ve never worked on one or installed one. I don’t normally do part replacements at all if I’m honest so any help would be appreciated please. Cheers
  3. A

    Viessmann Viterol 100 RF2

    Hello, I'm trying to replace a conventional Drayton central heating programmer with the above Viessmann wireless programmer, in my Viessmann 100W system boiler. I have a Y plan setup, and am unsure how I can get the programmer to output to the 3 port valve to call for CH or DHW. Does anyone...
  4. J

    Tado Viessmann Update - Best Result?

    I though I would share with you my experiences. Vitodens 200w System boiler and Tado V3+ Boiler fitted by engineer selected from Viessmann Website (Viessman advise they have no control over fitters). Complete car crash, tried to fit two pipe system to four pipe boiler, on site six times to fit...
  5. C

    Viessmann boiler some advice required

    We have just moved house and the boiler is a Vitodens 222-F with Vitotronic 200 control unit with weather compensation. I understand that the heating will come on at times even though the programmer is not calling for heat. But I am not happy with this. For example the stat is set at 19deg, sun...
  6. SimonG

    Viessmann Vitodens 100 Wb1b F4

    Quick question. Already know the answer. Boiler keeps coming up F4. Runs for a while but then fails. It's something in the boiler? Just don't want it to be anything I missed outside the boiler before I tell the customer to get their lpg engineer in.
  7. 3

    Viessmann 200-W menus

    Viessmann boiler control has two levels of parameters that can be set, level 1 and level 2, but level 2 seems to be almost identical to level 1. What is the purpose of the level2 control options?
  8. B

    Water heater leak, is piping wrong?

    Hello, I'm a renter of an apartment with a Viessmann Vitodens 222-w heater. I came back from a 1 week trip and my heater leaked into the ceiling of the apartment below me! I don't know what happened, but after some research, I suspect the heater wasn't installed correctly. Here is a...
  9. 3

    Height of a Viessmann boiler

    I’m about to hang a new Viessmann boiler prior to the commissioning and notice the guide says it must be a maximum of 1925mm from floor if the DHW cylinder is below it. I would like to position it 100mm higher than this but don’t want to do so blindly so what is the reason for the height...
  10. R

    Underfloor heating + Viessmann 222F

    hi all, Just purchased a property and looking at boilers etc. We’re going to have all of downstairs with underfloor heating (approx: 100 sq meters.) running backup rad pipes also downstairs (just in case!) 4 beds, will have an en-suite bedroom in the loft and also mid level bathroom. Rads in...
  11. S

    Viessmann 050 combi reviews

    Hey people, What’s your views on this entry level Viessmann combi. Any problems known with this boiler? Thanks in advance
  12. B

    Best Smart Thermostat System For Viessmann 222-F Boiler?

    Hi All, I have just got a new new Viessmann 222-F Boiler & need to decide which Smart Thermostat System to get for it - I am a novice & know nothing about these things and the choices out there are very many! My installer said he can install most of them but with certain models extra equipment...
  13. P

    Viessmann Viodens 100W 30W

    Viessmann Viodens 100W 30W Replaced Contol Unit Still Does not Re-ignite Heat. Followed room temperature controller operating instructions What si unit: IP 2B 6E - Power Unit Convert 230v to 110v Hot tap water - yes. Boiler Turns. water and heat symbol lit. ignition and Pump Turn on...
  14. fronty

    Viessmann boiler set at max just to get enough heat

    Just had a new Viessmann Vitoden 100w heat only boiler installed, I have to turn the dial all the way to max just to get some decent heat, if I turn it all the way (so it's pointing at reset) it'll settle at around 76 degrees. Is this normal? It's modulating fine, I was maybe expecting to set...
  15. J

    Viessmann Trouble Slow Heat Up

    Hello Everyone, Viessmann Vitodens 200w fitted with weather comp. I have a Tado V1 which says that the room is too cold and is demanding heat. However the boiler is taking two hours to heat the room and running at 29% output. Something does not feel correct, any thoughts? Julian
  16. J

    Tado / Viessmann advice

    Further to my last post I have had a Vitodens 200W fitted. I have a couple of questions if anyone can help. 1. I have a V1 Tado (the one with the connector kit, which only has five connections inside). Can the 200w link to this to get weather details or do I need a newer Tado kit? 2. If i use...
  17. 999

    Viessmann Vitotronic 300 K

    Hi all Just fitted a couple of viessmann 26kw system boilers cascaded together with the use of a Vitotronic 300k and weather comp. All this is fitted in the cellar and the customer is now asking is it possible to use a Tado or Hive unit. Has anyone here fitted any smart controls to a simliar...
  18. Robert Kondrat

    viessmann vitodens 100w hot water issue

    Hi Guys, New to the forum and absolute rookie so please have a mercy :) I have a combi Viessmann vitodens 100w which does not give the hot water constantly, we have moved in to the house 6 months ago and when during the summer months it's not a big issue, during the winter it would be nice to...
  19. 999

    Low Loss header- Viessmann system Boiler

    Hi All Looking for some advice Looking at cascading 2 viessmann 200 system boilers together with the use of a low loss header for 2 circuits, hot water and one central heating circuit. Tips on setup and wiring techniques. Would the weather compensation module fitted to the boiler work with...
  20. F

    intergas or viessmann? Maybe something else!?

    So, I need a system boiler. 5 bed, 2 bathroom, 3 underfloor zones(25sq m/26sq m / 12 sqm), 2 radiator zones(upper and lower), hot water(mains pressure 250ltr oso). I was looking at a viessmann, then an ideal gen2, however have been looking into the intergas system boilers. Are they that good...
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