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Daikin Altherma ASHP help needed – Radiators are not heating up

 
Air Source Heat Pumps (ASHPs)
Last Post by uffda 1 year ago
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 uffda
(@uffda)
Active Member Member
Joined: 1 year ago
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Topic starter 09/03/2024 5:52 pm  

Forgive me if this is in the wrong section but this is my first post.

My Daikin Alterma seems to be working but I don't have much heat coming through the radiators.

Please can someone tell me if the figures in the attached photo are correct and if not tell me how I can fix this?

Many thanks in advance 🙂

IMG 20240309 165015 3
IMG 20240309 112227

  s

This topic was modified 1 year ago by Mars

   
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Mars
 Mars
(@editor)
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Posts: 3307
09/03/2024 10:29 pm  

@uffda welcome to the forums. Is this something that has started recently and the rads were fine up until now?

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 HughF
(@hughf)
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09/03/2024 10:32 pm  

That’s a daikin hybrid system which uses an intergas boiler as the gas fired bit.

looks like it’s firing at 31 degrees flow temp, which is probably about right depending on your radiator sizing and the outside temp when you took that photo.

I prefer to spend a bit more on running costs and have my weather comp bottom out at 38.5 degree flow, as you can at least feel that temp flowing through the rads.

This post was modified 1 year ago by HughF

Off grid on the isle of purbeck
2.4kW solar, 15kWh Seplos Mason, Outback power systems 3kW inverter/charger, solid fuel heating with air/air for shoulder months, 10 acres of heathland/woods.

My wife’s house: 1946 3 bed end of terrace in Somerset, ASHP with rads + UFH, triple glazed, retrofit IWI in troublesome rooms, small rear extension.


   
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Mars
 Mars
(@editor)
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Joined: 4 years ago
Posts: 3307
09/03/2024 11:11 pm  

@uffda I’ve just received a message from Daikin who have kindly offered to send out an engineer to you to see if they can resolve the issue. Please let me know if this is of interest.

Buy Bodge Buster – Homeowner Air Source Heat Pump Installation Guide: https://amzn.to/3NVndlU
From Zero to Heat Pump Hero: https://amzn.to/4bWkPFb

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Mars
 Mars
(@editor)
Illustrious Member Admin
Joined: 4 years ago
Posts: 3307
11/03/2024 9:47 am  

Hi @uffda. Would you like me to put you in touch with Daikin and their engineer to help sort this out?

Buy Bodge Buster – Homeowner Air Source Heat Pump Installation Guide: https://amzn.to/3NVndlU
From Zero to Heat Pump Hero: https://amzn.to/4bWkPFb

Subscribe and follow our Homeowners’ Q&A heat pump podcast


   
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 Derek M
(@derek-m)
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Joined: 4 years ago
Posts: 4427
11/03/2024 11:33 am  

Posted by: @uffda
↑

Forgive me if this is in the wrong section but this is my first post.

My Daikin Alterma seems to be working but I don't have much heat coming through the radiators.

Please can someone tell me if the figures in the attached photo are correct and if not tell me how I can fix this?

Many thanks in advance 🙂

IMG 20240309 165015 3
IMG 20240309 112227

  s

Are you maintaining the desired indoor temperature?

During milder weather the heat loss from your home will be much lower, so your radiators do not need to be very warm. 

 


   
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 uffda
(@uffda)
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Topic starter 11/03/2024 1:40 pm  

@hughf Many thanks 🙂


   
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 uffda
(@uffda)
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Joined: 1 year ago
Posts: 4
Topic starter 11/03/2024 1:41 pm  

@derek-m Okay thanks 🙂


   
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 uffda
(@uffda)
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Joined: 1 year ago
Posts: 4
Topic starter 11/03/2024 1:41 pm  

@editor No thanks 🙂


   
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