Last seen: Dec 6, 2025
There seems to be plenty of evidence to support this. My measured loss is consistent with ach of 0.5-1 whereas the mcs calcs default to 2-3. ashp sy...
yes to both, probably. External controls for ashps (and many modern boilers) are largely superfluous and frequently counterproductive. The possible...
@solenoid it sounds like you are making progress. No need to hurry these things and please feel free to ask any questions.
I think you are right about the ebus stick. It's certainly possible to change at least some of the exposed vaillant parameters through the ha integr...
Yes, you can work out a lot from a plot of FT. Interesting that there were both deep and shallow defrosts, for reasons I dont understand.
OK thats a pity it would have been good to see if/how defrost changed as a result of switching off night shift and overnight there would have been ple...
My Vaillant was defrosting every 45-60mins overnight (chart shows FT). As you can see it doesnt fully recover from the defrosts because noise reducti...
Something odd about this diagram; the refrigerant is moving in the wrong direction for defrost - warm refrigerant from the compressor should be headin...
Thats a bit suspicious. Some (older?) heat pumps apparently defrost on a timed cycle rather than on demand. I wonder if these are in that category (...
Latest Posts
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RE: Getting the best out of a heat pump - is Homely a possible answer?
@grantmethestrength thanks, yes I did that. But couldn’...
By Vanq , 2 hours ago
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There seems to be plenty of evidence to support this. ...
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Experience with Mitsu Par 50/60 Wireless Controller
Last winter I used weather compensation, but became ver...
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RE: One Year Review: Grant 13kW ASHP - A Catalogue of Errors
@solenoid it sounds like you are making progress. No n...
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RE: LiFePO4 lithium battery fires and explosions
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RE: Grant Aerona Short Cycling
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By Steam Powered , 4 hours ago
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RE: How good is the app support for your heat pump?
I think you are right about the ebus stick. It's cert...
By JamesPa , 16 hours ago
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RE: My DIY Heat Pump installation
@majordennisbloodnok Element-ary my Dear Major.
By Toodles , 19 hours ago
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RE: Replacing my 18 month old Hitachi Yutaki ASHP
Yes, you can work out a lot from a plot of FT. Interes...
By JamesPa , 1 day ago
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Welcome to the forums @isaac. What you’re describing is...
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Win an Eve Smart Home Bundle worth over £350!
Win an Eve Smart Home Bundle worth over £350! ...
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RE: Is your heat pump insured?
I chose Tesco in the end. Unambiguously cover HP, PV an...
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RE: Help me keep the faith with my air source heat pump installation
@adamk You can get an idea of if your flow and return...
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This Solis inverter being rated 8kw and (I expect, as I...
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RE: A2A vs A2W: Which Heat Pump Would You Pick?
I have one fancoil in an otherwise all radiator system....
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RE: Electricity price predictions
That's understandable...but I was referring to our 'oth...
By Transparent , 2 days ago
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@batpred Inwas looking at the Ånderson Wall Box, found ...
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RE: Solis S6-EH1P8K-L-PLUS – Why I Chose It and What I’ve Learned So Far
I'll be interested to see how you get on. Are ...
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