Ewan Posted January 18, 2023 Share Posted January 18, 2023 Vaillant 5kW (2.2kW turndown) was our preferred choice but is not compatible with Homely. Samsung HTQs start at 8kW, so a possibly a bit big, assuming a 1/3rd turndown of 2.6kW. What other heat pump with modbus for Homely should we be considering? Link to comment Share on other sites More sharing options...
HughF Posted January 18, 2023 Share Posted January 18, 2023 (edited) Midea 6kW? Or badger the crap out of evergreen energy until they add support for other heatpumps. Homely is either Samsung or midea at the moment. You could always for the the smallest Samsung gen6, I see no need to go for the HTQ. Edited January 18, 2023 by HughF Link to comment Share on other sites More sharing options...
billt Posted January 18, 2023 Share Posted January 18, 2023 +1 for the Samsung Gen 6. It's pretty cheap and, if designed and installed properly should be pretty much as efficient as the newer models. Just bought the 8kW version, I was going to use a Vaillant but decided the price premium wasn't justified. Link to comment Share on other sites More sharing options...
Ewan Posted January 18, 2023 Author Share Posted January 18, 2023 Samsung Gen 6 could work, although it's a little noisier at 61dB and we're right on the borderline with MCS noise calcs, I'll have to move it along a bit. Eats up our space for other planned uses but could be worth considering. Midea 6kW could be a good shout. Going in search of technical data (mostly turndown) on these now.. Link to comment Share on other sites More sharing options...
HughF Posted January 18, 2023 Share Posted January 18, 2023 (edited) If you do go for the Samsung gen6, make sure to follow the midsummer wholesale installation guide which instructs you to use a pwm primary pump and use the Samsung controller as the room stat. the alternative, freedom heatpumps, instructions suggest a non-pwm primary pump and an external stat. although, if you go down the homely route then that will take care of all the stat and room temp stuff for you. Edited January 18, 2023 by HughF Link to comment Share on other sites More sharing options...
JohnMo Posted January 18, 2023 Share Posted January 18, 2023 May depend if you are UFH or rads. Or just spend the time fine tuning weather or load compensation. Not sure it does much more than that anyway. Link to comment Share on other sites More sharing options...
Ewan Posted January 18, 2023 Author Share Posted January 18, 2023 4 minutes ago, JohnMo said: May depend if you are UFH or rads. Or just spend the time fine tuning weather or load compensation. Not sure it does much more than that anyway. UFH downstairs rads upstairs. Make much odds? Link to comment Share on other sites More sharing options...
ReedRichards Posted January 18, 2023 Share Posted January 18, 2023 1 hour ago, Ewan said: UFH downstairs rads upstairs. Make much odds? Yes. You may well need hotter water for the rads than you do for the UFH. If so, when the rads are not calling for heat you want the heat pump to react to this by reducing its output water temperature to match the UFH. If you cannot do this then you cannot derive any economic benefits from the UFH. 1 Link to comment Share on other sites More sharing options...
HughF Posted January 18, 2023 Share Posted January 18, 2023 4 hours ago, Ewan said: UFH downstairs rads upstairs. Make much odds? Yep, you’ll need to either size the rads to suit the flow temp of the ufh, or run the system at a higher rad temperature then use a decent blending/pump station on the ufh. Hydraulic separation can come from close coupled Ts on the return pipework. 1 Link to comment Share on other sites More sharing options...
HughF Posted January 18, 2023 Share Posted January 18, 2023 5 hours ago, JohnMo said: May depend if you are UFH or rads. Or just spend the time fine tuning weather or load compensation. Not sure it does much more than that anyway. Show me a heat pump controller that does load compensation 🤣 *LG and Mitsubishi are the only two that spring to mind, and they don’t even call it that. Link to comment Share on other sites More sharing options...
JohnMo Posted January 18, 2023 Share Posted January 18, 2023 2 hours ago, HughF said: Show me a heat pump controller that does load compensation That's possibly me thinking these super modern heat pumps, would be ahead or at least match of my gas boilers 10 to 15 year old technology. Link to comment Share on other sites More sharing options...
ReedRichards Posted January 18, 2023 Share Posted January 18, 2023 I bought a gas boiler 25 years ago (Atag) that did both weather and load compensation. Link to comment Share on other sites More sharing options...
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