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Last seen: Aug 16, 2026
Hi @cathoderay The 13kWh is as they say my bad, I was calculating 3 hour periods for the reheat and mistakenly only multiplied by 3 here, so 13 ...
The predicted values are based on assumptions and it is these assumptions that need testing IMHO. Your 9-10 April graph shows that prior to your se...
I'm not James but here's some thoughts... Have you tried to control for solar gain? And what about controlling for wind chill effects (speed an...
Thanks, if the water can drain out of the heat pump without any issues in sub-zero temperatures then that's one possible issue ruled out. But if th...
@trebor12345, a few questions if you don't mind... Does the water come from drain holes in the bottom of the heat pump or is there a pipe to carry ...
It is usual for the flow temp to start to drop as a heat pump approaches a defrost, here's a 7kW Vaillant like yours doing the same (if less pronounce...
@trebor12345 @jamespa If it helps any this documentsays the Hitachi RAS-3WHVRP1 can modulate down to 2.1kW at 7C OAT and 35C flow temp. So another ...
Hi David, If your Mitsi is still on weather compensation then the WT60 should act as an internal temperature limiter. The temperature it's set to i...
Hi David We have an FTC7 but the settings seem to be similar to an FTC6. Our room sensor settings are: Zone sensor selection sets zone 1 to RC1 ...
This might be useful for @bart From/p> "Warning: It is vital that the system does not cycle on and off repeatedly as this will lead to excessive w...
Hi @m1kegibson Maybe a long shot but is the controller in holiday mode? There would be a suitcase symbol towards to top left of the screen if it is...
@carpenterstation When changing settings in the service menu you often need to shutdown the system first, so if it's running it'll ask you if it's...
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Degrees of Separation
Latest Posts
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@davidb I can’t help you with contacts at Vaillant unfo...
By Mars , 1 hour ago
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RE: Starting Our Heat Pump Journey: 1962 build 3 bed detached house
@Ian-S, I actually think this is a pretty reasonable pl...
By Mars , 1 hour ago
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RE: Who's your electricity provider and what's your tariff?
@toodles I invested on Miele a pair of frodge frozor wh...
By AgentGeorge , 5 hours ago
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RE: Flushing system, cleaning and inhibitor
Flush and fill all complete. Octopus kindly gave us a...
By Old_Scientist , 5 hours ago
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RE: Wood burner with ASHP - direct air?
For what it's worth I installed a wood burner in this o...
By BlizzardGreen , 6 hours ago
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RE: Do I add Air Con or MVHR to existing A2W ASHP?
I think I saw a diagram for an exhaust air dhw tank wit...
By JamesPa , 1 day ago
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RE: Indevolt Batteries UK Support & Info Thread
Thanks, however that's an answer to a subtly different ...
By JamesPa , 3 days ago
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RE: Solar Power Output – Let’s Compare Generation Figures
@toodles Such elegant symmetry. look at my lumpy bag of...
By Papahuhu , 4 days ago
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RE: PV and battery long payback - sense check query
Quite probably not, but you can get a 32A relay and a S...
By JamesPa , 4 days ago
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I don't notice mine defrosting, and most of the time Im...
By JamesPa , 5 days ago
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RE: Do I need to change the control unit when replacing my Ecodan Air Source Heat Pump
Kind of you, @calumm, but it was @f1p who did the heavy...
By Majordennisbloodnok , 6 days ago
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RE: Electricity price predictions
2. As EV ownershp increases it'll certainly increase de...
By EtchedPixels , 6 days ago
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