I thought it might be useful for the Vaillant Arotherm heatpump and its owners to have their own thread. So any questions, queries, things we’ve learnt and performance chatter can go in here. For starters, anyone looking for in depth performance information, this technical document from the Czech …

Thanks, I’ll start with the flow and return sensors, coupled with a csv from Heatmiser. That’ll show me what happens when I use numerous zones together.

I wonder if the app could be retrofitted to give SCOPs broken out for DHW and heating (rather than manually drilling down). I guess you would need to bring a signal in from the 3 port valve and use that to push the data into another bucket or whatever.

[image] Willenic: So £50 on sensors and Raspbery PI 4. Bargain. I’m hoping that was sarcasm :upside_down_face: - a WEMOS and a couple of sensors from the shop and you could buy a decent meal out for 2 with the difference! I’ve gone off Shelly. Too many pictures on the Facebook support site …

[image] tommyt: I wonder if the app could be retrofitted to give SCOPs broken out for DHW and heating (rather than manually drilling down). I guess you would need to bring a signal in from the 3 port valve and use that to push the data into another bucket or whatever. @Timbones and I had thr…

Hi All, So having happily set my heat curve to 0.7 I was surprised to see my Target flow temp on the Interface (VWZ AI) at 60C and 42C on the Sensocomfort this morning. It was -2C at the time according to my external sensor and air inlet temp was -4.3C. Sensocomfort is following the heat curve, th…

[image] Willenic: Anyone got any thoughts on target flow on the interface being at 60C? So from what I can tell at low external temperatures in Weather compensation mode the Target flow is around 60C until the Sensocmofort Temp > Desired Temp. Then the target temp drops to <30C.

[image] Willenic: So from what I can tell at low external temperatures in Weather compensation mode the Target flow is around 60C until the Sensocmofort Temp > Desired Temp. Then the target temp drops to <30C. I’ve never seen this during heating. The only time my flows go towards 60C is duri…

[image] Zarch: Which mode have you got the heating set to? Inactive = pure WC Active = WC with room influence Expanded = WC, Room influence, but also acts as on/off stat switching the heating off if room temp is exceeded Today was on Expanded because I misread the different descriptions. Ho…

My installer has checked with Vaillant and advised me to remove the temperature sensor that is in my buffer. I just pulled out the VF1 connection to the interface. Seems in line with the recommendation run without a buffer. Vaillant have just changed their advice on this apparently. Had the odd day…

My first look at “Normal” versus “Balance” for hot water Reminder. [image] Zarch: Normal: Max. compressor speed 120 rps possible. Eco: The max. compressor output is reduced to 50 rps (S+M)/40 rps (L). The speed limit is lifted at air inlet temperatures below -7 °C. Balance: If return temperat…

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