m0deller

Good explanation here on HW https://energy-stats.uk/arotherm-plus-hot-water-modes/ I use ECO over the summer to maximise solar PV consumption

Have had cooling running for the last few days, just downstairs using UFH. It does help. It's not as effective as A2A AC , but for £5 it's worth it. I am also exploring using fans on rads for upstairs. It drops the temp down a few degrees.

when it gets cold and humid air hits that box ... probs won't last long !

Octopus Go Faster. 6hrs cheap 0130->0630. 12kW Vaillant ASHP

I'd stick to a European brand. Know your data is safe then...

ebusd plays nicely now with home assistant (auto config) via mqtt. I log into open energy monitor via node-red , using mqtt .

Did you go for a solar reflective coating on the windows? Seems to make quite a difference

Contact Freedom heat pumps? They are the importer in the UK

If you're designing for the future go ASHP. Expect gas to get more expensive relative to electricity in the longer term. It's also really cool heating your house off solar on a bright and cold winters day. I'd also put in as much PV as possible.

We have cooling! When I looked last night, the Outdoor temp 24hr average menu item (sensoComfort Installer menu) wasn't displayed. I've looked this morning and it's now there. Looks like it needs 12hrs or so to start calculating the avg. I can now manually enable cooling. Planning on using it via timed mode to make use of solar PV.

Active cooling enabled , and I've manually set a circuit to manually cooling .. but nothing so far 😞 Anyone else got this working on the aerotherm plus?

Got the blue key. £5 .

There's lots of info on the ebusd GitHub site. I mainly just read to generate CoP figures etc. Most attributes can be written to as well.

@Dan FWhat are you wanting to do via ebus? Assume you know about ebusd?

My understanding is that it will calculate the dew point and prevent condensation. It has humidity and temperature sensors. I'd trust your own research rather than an "installer."

I've ordered the blue plug (VAI0020266328) for the aerotherm+. Will confirm if it works or not.

Not sure I'd bother with a mixenergy tank with a heat pump as they are optimised for direct electrical heating. I read they need an external heat exchanger with an ASHP? I had a similar dilemma last summer Mitsu vs Daikin vs Vaillant. Went with the latter in the end, despite it being a little more expensive. Newer refrigerant , higher on-paper CoP and integrates with their smart TRVs. Very happy so far. Achieved a CoP of just under 4, despite running it mainly overnight (Octopus Gofaster tariff) when it's colder.

We have 3 pumps , 2 inside (Wilo and Grundfos) and 1 in the external unit. This is due to having the Vaillant HEX module.

I use emon for monitoring the ASHP. It's a great product. Our Aerotherm+ uses 8W on standby. 200W is crazy.

We have the aerotherm+ and use an immersion diverter (Apollo GEM). This diverts every excess watt into the HW, to typically we don't need the heat pump running May to Sept. What I've found however is that the immersion is mid tank and the Vaillant temp sensor is below the immersion , so getting an accurate reading is difficult. I schedule the HW circulation pump to run around mid day to mix up the water (get more energy from the solar PV) .. but this only works if the HW is enabled on the Vaillant controller. It's too smart for its own good!

We installed an ASHP in October. Previously had gas with Drayton Wiser TRVs in all rooms .. all quite complicated. A heat pump , to maximise CoP and reduce starts (consume more power) should be run long and low. Mine is now 24x7 with setback of 2C at 10pm. So far we seem to be using less energy heating the whole house vs switching rooms on and off using the TRVs. The other thing to note is that by using the heat pumps thermostats it's able to work out the optimal flow temperate .. external binary controls won't do this. Also, unless it's changed, Drayton said not to use wiser with heat pumps as it causes too many starts. Evohome is expensive .. I'm sceptical that you'd ever get your money back vs using heat pump's controls

J1mbo .. interesting and thanks. I did wonder why the working figure was higher .. never occurred to me that the yield didn't include the power used. Every day a learning day!

Yes, all circuits run at same temperature. The UFH is directly couple - no blend valve I've not tried Active , so can't comment vs Expanded I run ebusd on a pi using the ebus adapter (Wemos D1) WiFi , with a circuit I built myself from here (whilst I wait for ebus Adapter 3) . This is linked to emoncms which is where I do the graphing and trending. Using emon I can measure the power consumption from the ASHP and fuse this with the environmental yield from ebus to generate a rolling CoP. Because I run the ASHP harder overnight (when it's typically colder) , my CoP suffers .. but I'm paying 5.5p/kWh (for the time being ? )

I have an aerotherm+ 12kW with 3 circuits, HEX and 45l buffer. The VF1 is connected into the top pocket of the buffer. It's using circuit 10. Expanded room temperature. The flow tracks the demanded flows (I'm using ebusd to monitor)

Has anyone got experience of CUIN glazing , I think from https://www.crystalunits.com/cuin/ ? We're talking to a window supplier (sliding doors) and they've suggested using CUIN to reduce Uw. It double glazing that offers near triple glazing performance. 1.6 > 1.2 Uw.