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Yeah that’s what I’ve been doing so far but meter placement makes it difficult.

They keep feeding me that their business decision is not to!

Pretty much!

They had an electric smart meter installed and as it’s smets1, the smart gas meter would not be compatible nor are they willing to change my electric to smet2 so that gas meter can be installed.

The brother and I have similar setups, same boilers and ufh. His boiler is 2021 whereas mine is 2023 if that makes any difference (identical make and model) My boiler flow is set to 62 and at mixer to 45, when system is running the boiler flow displays 62 and mixer displays 45. His boiler is...

D.02 say Max. anti-cycl. time: Heating 25 min I found this a good explanation http://vaillantcyclingproblem.blogspot.com/2012/01/anti-cycling-mode-and-d2-parameter.html?m=1

Legend, I can’t thank you enough. Will test radiators this week. Hopefully they should be fine. Will report my findings.

Yes this is only UFH on, not been cold enough for radiators to come on. 9 in total for all 6 ports Manifold display feed in 45°C Manifold display feed out 31°C

Running a lot better today. only 1 cycle but happened when HW reached temp and actuator switched off. Reduced flowrate to 1.5l/min d.00 set to 16kWh d.02 set to 25 mins Boiler is running at 65°C with flame at minimum: d.40 = 65°C d.41= 57°C I've checked for any s codes but only code I see...

Understood, I assumed it was based on amount laid rather than coverage, i'll adjust and continue to monitor through out today.

There’s not branding on it but from a quick google it’s likely Drayton 22mm automatic bypass valve. Index looked to be 0.3

My IR gun doesn’t give correct temp when measuring the pipes but seems to be fine for everything else! I’ll pick another one up soon. Yes, ABV installed

It's Auto What/where is the s parameter?

Your assumption of running for 5 to 10 minutes then cycling is correct. what i don't understand is why during that 5/10 minute period it hovers at 49°C then suddenly shoots up to 70°C but I've changed d.02 to 25 minutes and will monitor this over 24 hours. By chance/luck radiators havent come...

d.00 already set to 20kWh Will check d.40/d.41 when they on next... what should the difference be?

Apologies for the confusion, 85m² is area that the underfloor heating is covering, I think between 600 to 700m of UFH piping was laid.

Yes the builders subcontracted the Heat loss calculation to their engineer, I wanted the sensoCOMFORT initially but the engineer dissuaded me with disaster stories like a fool i bought his nonsense

I’ve worked this out to around 11X60X12/860= 9.2

Thanks for that. I do have similar issues with radiators. I dont think there is LLH, UFH has its own pump if that makes a difference (sorry this is all new to me) For main zone which uses 4 ports on UFH manifold all guages set to 2.0l/min. For zone 5 and 6 they are set at 1.5l/min. Based on...

My new Vaillant Ecotec Plus 637 system is cycling constantly, despite reducing flow temperature and adjusting settings. Details of the system Vaillant Ecotec Plus 637 boiler 250L megaflow water tank 6-port manifold underfloor heating (4 ports as 1 main zone + 2 individual zones) coverage an...