A newbie here who got a Grant Aerona 3 installed through a local council scheme. I previously had storage heating and what a difference the ASHP has made to my overall comfort. I did get a hand over with the installer but to be honest it was a lot to take in at one go, so I have some questions.
The parameters have been set up correctly, or at least to what the installer has written down in the handover pack, I have checked this on the Grant controller (see picture) So weather compensation is enabled.
So my question is about the Drayton controllers. Do they override the weather compensation? Currently I have the thermostat on the wall set to 20c and its saying its 18.5c and theres the little flame so calling for heat but the ASHP isn't showing as being on on the grant controller. Any help appreciated to get the system working as efficiently as possible.
I agree with @dgclimatecontrol. The Drayton controls (and any other third party controls) almost certainly shouldn't be there as they will conflict with the heat pumps own controller. Best bet is to turn them up as @dgclimatecontrol suggests and run the heat pump on its own controller. You also (for best efficiency/max comfort) want all or at least most of your TRVs turned to max and then to adjust the weather compensation down on the Grant so your house is at the right temperature. Its worth reading this introduction to heat pumps
4kW peak of solar PV since 2011; EV and a 1930s house which has been partially renovated to improve its efficiency. 7kW Vaillant heat pump.
The controller below I think seems to be controlling what hours the heating is on?
Very likely. Suggest you try setting it on 24x7 and turning down the weather compensation curve to suit. Unusually Id start by reducing the high OAT end. 37FT @20 OAT is a (often used) fudge by the installer to ensure that the radiators always feel hot, which they shouldn't - but by ensuring they do it avoids callouts. Suggest 30@20 might be a good starting point. Then explore if you can turn down 50@-7 whilst still keeping the house warm. You may be able to you may not.
Usual warnings apply,
write down settings before you make any changes so you can go back
I'm not a heating specialist just a householder with a background in physics and engineering who has been studying this stuff for 2-3 years.
