Lofty718

I am going through the same right now fiddling with my heating system But mines much more complicated it's an ecotec 630 with one external pump for PDHW + rads and another for UFH controlled by sensocomort vrc720f and vr71 wiring centre. There are many different parameters you can control, have you gone into the installer settings on the boiler, where you can adjust pump speed etc To get the most out of your system make sure radiators are balanced and the correct pump speed is set. My system is running on weather compensation and the boiler runs at 42c when it's 0c outside, it's fully controlled by the outdoor weather sensor with no room influence and I can run my system at 3 different flow temperaures at once, you should add the weather sensor to your setup too. How do you fit an ebus monitor to the boiler? I'm very interested as it costs over 200 quid to get the valliant add on to allow monitoring from the phone, and I do not want to pay that

@PiMike

Why not run those radiators from the UFH manifold at the same low flow temp. Will help with efficiency