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Getting the best out of a heat pump - is Homely a possible answer?

 
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Air Source Heat Pumps (ASHPs)
Last Post by benson 15 hours ago
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Toodles
 Toodles
(@toodles)
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Joined: 3 years ago
Posts: 1930
11/05/2025 8:54 am  
@majordennisbloodnok I’m not @transparent ! (Boom-Boom)

Toodles, he heats his home with cold draughts and cooks his food with magnets.


   
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Toodles
 Toodles
(@toodles)
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Joined: 3 years ago
Posts: 1930
11/05/2025 9:33 am  

@majordennisbloodnok I’m NOT @transparent  !

Toodles, he heats his home with cold draughts and cooks his food with magnets.


   
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 Arundalep
(@arundalep)
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Joined: 9 months ago
Posts: 22
11/05/2025 12:45 pm  

@benson Having access to the dashboard doesn't allow changing of the max or min flow temperatures AFAIK, only their own tech team can alter those within Homely. A workaround for some systems (certainly Samsung) is to alter the min and max water temperature limits for the controller (FSV 1031 /1041 & 1032/1042). This stops the heat pump from accepting flow temperature requests outside of this range.

1970’s 3 bed detached house in West Sussex. Mains gas disconnected September 2023.
Samsung HTQ 8kW heat pump using mostly existing radiators. House is warm 24/7 (normally between 20.3-20.6 C but currently with a newborn its 21-21.2 C).
Sunamp for hot water storage.
Solaredge 6kWp PV and 10kWh battery
Vehicle 2 Grid charger (used with a Leaf)
Wallbox EV charger (installed for Octopus Intelligent).
Home Assistant used for HEMS with lots of custom ESP devices to allow integration.

Insulation upgrades:
EPS cavity wall insulation.
Improved loft insulation (renewed and 300mm where possible).


   
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 benson
(@benson)
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Posts: 100
11/05/2025 1:08 pm  

@arundalep that is correct. The dashboard just shows the data and you have to contact their tech team to change them.

Our installers told us that homely automatically sets the max and min flow temps but I don't believe that is correct and they set them when they initially commissioned within the installer app (there's no way to retrospectively change them in the installer app either from what I can see).


   
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Toodles
 Toodles
(@toodles)
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Joined: 3 years ago
Posts: 1930
11/05/2025 1:13 pm  

@benson Homely told me that the max/min settings were initially set up by my installers and they had to check with them before they would make any changes. (Ours is a Daikin) Toodles.

Toodles, he heats his home with cold draughts and cooks his food with magnets.


   
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 benson
(@benson)
Reputable Member Member
Joined: 1 year ago
Posts: 100
11/05/2025 1:39 pm  

Yes that sounds about right. My installers provided the above account when I asked them why it was set at 50 when design temp was 45…and as with many things when challenged they didn’t provide an honest response.

Hence why I just don’t want to be reliant on my installers for any aspect of my central heating system. 

 

This post was modified 16 hours ago by benson

   
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 Arundalep
(@arundalep)
Trusted Member Member
Joined: 9 months ago
Posts: 22
11/05/2025 2:00 pm  

@benson @toodles  During the initial commissioning there are options for these. Once they are set you need to contact support to change them. The Samsung FSV hack is useful if you need to limit the low end limit to say 36-37C if you are running radiators during the shoulder months (ie rad output is below minimum heat pump output). I used the FSV settings to limit Homely until I found good values and then got Homely to apply these to their setup. 

I really like Homely and on the whole it works great but I did struggle with the lack of user (and Installer) adjustability. For me I had to remove it because it overrides all of the heat pumps own controls and they offer no method of external control other than the app (which I think is poor in this day and age). But if you aren't bothered about integrating Octopus Intelligent unscheduled cheap slots (which I am) it is generally a good solution, as is Havenwise.

1970’s 3 bed detached house in West Sussex. Mains gas disconnected September 2023.
Samsung HTQ 8kW heat pump using mostly existing radiators. House is warm 24/7 (normally between 20.3-20.6 C but currently with a newborn its 21-21.2 C).
Sunamp for hot water storage.
Solaredge 6kWp PV and 10kWh battery
Vehicle 2 Grid charger (used with a Leaf)
Wallbox EV charger (installed for Octopus Intelligent).
Home Assistant used for HEMS with lots of custom ESP devices to allow integration.

Insulation upgrades:
EPS cavity wall insulation.
Improved loft insulation (renewed and 300mm where possible).


   
ReplyQuote
 Arundalep
(@arundalep)
Trusted Member Member
Joined: 9 months ago
Posts: 22
11/05/2025 2:02 pm  

@benson The Homely installation guidance is to set it above the design temperature to allow it to work harder (ie above design) if the conditions demand it (cheap / cold etc).

1970’s 3 bed detached house in West Sussex. Mains gas disconnected September 2023.
Samsung HTQ 8kW heat pump using mostly existing radiators. House is warm 24/7 (normally between 20.3-20.6 C but currently with a newborn its 21-21.2 C).
Sunamp for hot water storage.
Solaredge 6kWp PV and 10kWh battery
Vehicle 2 Grid charger (used with a Leaf)
Wallbox EV charger (installed for Octopus Intelligent).
Home Assistant used for HEMS with lots of custom ESP devices to allow integration.

Insulation upgrades:
EPS cavity wall insulation.
Improved loft insulation (renewed and 300mm where possible).


   
ReplyQuote
 benson
(@benson)
Reputable Member Member
Joined: 1 year ago
Posts: 100
11/05/2025 2:41 pm  

@arundalep yes I have no issue with this. The observation I made was that it was regularly going up to 50 when not at peak heating demand. This is why I queried it rather than insisting it was set precisely on the limit. Some aspects of the install have now been sorted with an additional radiator upgrade and a more realistic design temp of 47 being disclosed on the final paperwork (and some financial compensation). Currently it is set up with a max flow temp of 50.

I agree it is good. I just don't want to be reliant on my installers for anything going forward and this I think is a flaw in the operating system.


   
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