Absolutely love these videos :-) Especially this one. Three questions if I may…? 1) one of the circuits is unmixed. Why would you do this? 2) You have a manifold, but can’t see a LLHeader, is there one? 3) I’ve see vertical LLH recommended for W200 and also horizontal, which fits the manifold. Is there a preference? Ps: Would love to see a video on ‘How do you size Divicon?’ Keep up the good work, you are the superhero of Viessman geeks
Is the weather compensation curve part of the mixing group? There would be a set of curves in the boiler controls but that would be for the radiators, right?
Whats the benefit of using a mixed divicon on an UFH circuit as opposed to using a pump and mixer valve on the manifold. I'm looking to do a self build with UFH ground floor and radiators upstairs so i require different flow temps and want a rads designed for lower flow too to future proof for replacements of gas boilers.
A divicon controls temperature following a weather compensated curve. A fixed mixer offers only over temperature control to a circuit. A fixed mixer is a very poor choice almost always.
You need a Viessmann 200, two mixing groups and a manifold. If towel rails a further unmixed group is needed. Standard design from the Viessmann r technical guide.
@@andrewmillwardwatford9410 Is the manifold you refer to my UFH one for the 16mm pipes to connect to, but without the bolts ons? Then would the mixed divicon supply water to the UFH and the unmixed would be sent to the upstairs radiators direct from the boiler?
@@andrewmillwardwatford9410 I'll be installing a Viessmann 111-W soon with 1 mixed circuit for ufh but decided to go unmixed for radiators, all on WC. Will that extra 8 degrees go straight through to my rads or will that diminish due to header mixing?
How come the mixing valves are only compatible with the Viessmann 200 and not the older models like VITODENS 100-W? i.e what is the missing functionality and is it not possible to trick the boiler controls somehow to make it work with a mixing group?
@@andrewmillwardwatford9410 I don't bother fitting boiler with aluminium heat exchanger I need to power flush system someone fitted vaillant ecotec pure witch in my opinion are Pure s**t the block up very easy and have other problems to Can't fill the system with fx2 I need good idea for type on cleener
Fantastic install, Fantastic gas pipe!! ACE!!
Absolutely love these videos :-) Especially this one. Three questions if I may…?
1) one of the circuits is unmixed. Why would you do this?
2) You have a manifold, but can’t see a LLHeader, is there one?
3) I’ve see vertical LLH recommended for W200 and also horizontal, which fits the manifold. Is there a preference?
Ps: Would love to see a video on ‘How do you size Divicon?’
Keep up the good work, you are the superhero of Viessman geeks
Thank you for your compliments.
I've used a plate heat exchanger to give hydraulic seperation.
The unmixed circuit is for towel rails normally.
Is the weather compensation curve part of the mixing group? There would be a set of curves in the boiler controls but that would be for the radiators, right?
Lovely landscape
Whats the benefit of using a mixed divicon on an UFH circuit as opposed to using a pump and mixer valve on the manifold. I'm looking to do a self build with UFH ground floor and radiators upstairs so i require different flow temps and want a rads designed for lower flow too to future proof for replacements of gas boilers.
A divicon controls temperature following a weather compensated curve. A fixed mixer offers only over temperature control to a circuit. A fixed mixer is a very poor choice almost always.
You need a Viessmann 200, two mixing groups and a manifold. If towel rails a further unmixed group is needed.
Standard design from the Viessmann r technical guide.
@@andrewmillwardwatford9410 Is the manifold you refer to my UFH one for the 16mm pipes to connect to, but without the bolts ons? Then would the mixed divicon supply water to the UFH and the unmixed would be sent to the upstairs radiators direct from the boiler?
@@handle1196 better to use two mixed circuits but one unmixed and one mixed will work.
@@andrewmillwardwatford9410 I'll be installing a Viessmann 111-W soon with 1 mixed circuit for ufh but decided to go unmixed for radiators, all on WC. Will that extra 8 degrees go straight through to my rads or will that diminish due to header mixing?
How come the mixing valves are only compatible with the Viessmann 200 and not the older models like VITODENS 100-W? i.e what is the missing functionality and is it not possible to trick the boiler controls somehow to make it work with a mixing group?
Hi Andrew. Great work as usual. Does all wiring go back to em1 unit including pump and sensor?
Some to Boiler also
Hi Andrew love the video
What would you recommend as a system pre treatment and cleanner for system with aluminium
Heat exchanger
Never fit aluminium in a heating system.
@@andrewmillwardwatford9410 I don't bother fitting boiler with aluminium heat exchanger I need to power flush system someone fitted
vaillant ecotec pure witch in my opinion are
Pure s**t the block up very easy and have other problems to
Can't fill the system with fx2
I need good idea for type on cleener
@@128769543956 I've used hyper flush successfully. Add 1L to the primary and rum on hot water only for 3 days. Only failed me once
Do you have a link for the Divicons please
www.ebay.co.uk/itm/Environ-Underfloor-Heating-DN-25-with-3-way-mixer-and-Wilo-Para-25-6-Pump-/112975612521?mkcid=16&mkevt=1&_trksid=p2349624.m46890.l49286&mkrid=707-127634-2357-0
How about the low loss header under the divis?
lol whoever has to service this will be forever cursing your name
Lucky it won't be me my knees are shot. I was quite shocked when presented this space to fit it all in.
@@andrewmillwardwatford9410 So I'm not the only one who has sore knees 🙃😉