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Daikin Altherma ASHP help needed – Radiators are not heating up

 
Air Source Heat Pumps (ASHPs)
Last Post by uffda 3 years ago
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 uffda
(@uffda)
New Member Member
Joined: 3 years ago
Posts: 4
Topic starter 09/03/2024 4:52 pm   [#1419]

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



   
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Mars
 Mars
(@editor)
Illustrious Member Admin
Joined: 6 years ago
Posts: 4962
09/03/2024 9:29 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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Joined: 5 years ago
Posts: 489
09/03/2024 9:32 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.


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)
Illustrious Member Admin
Joined: 6 years ago
Posts: 4962
09/03/2024 10:11 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.


🔥 Britain’s Heat Pump Shitshow
How Installing a Heating System Became a National Nervous Breakdown
Free UK shipping.
📗 Heat Pumps Explained
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Rewritten and updated for 2027
📘 From Zero to Heat Pump Hero
🛠️ Bodge Buster
New to heat pumps?
Take the Heat Pump Fundamentals course and use INTRO50 at checkout for 50% off.


   
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Mars
 Mars
(@editor)
Illustrious Member Admin
Joined: 6 years ago
Posts: 4962
11/03/2024 8:47 am  

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


🔥 Britain’s Heat Pump Shitshow
How Installing a Heating System Became a National Nervous Breakdown
Free UK shipping.
📗 Heat Pumps Explained
A Jargon-Free Guide for Homeowners
Rewritten and updated for 2027
📘 From Zero to Heat Pump Hero
🛠️ Bodge Buster
New to heat pumps?
Take the Heat Pump Fundamentals course and use INTRO50 at checkout for 50% off.


   
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 Derek M
(@derek-m)
Illustrious Member Member
Joined: 6 years ago
Posts: 4425
11/03/2024 10:33 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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Joined: 3 years ago
Posts: 4
Topic starter 11/03/2024 12:40 pm  

@hughf Many thanks 🙂



   
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 uffda
(@uffda)
New Member Member
Joined: 3 years ago
Posts: 4
Topic starter 11/03/2024 12:41 pm  

@derek-m Okay thanks 🙂



   
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 uffda
(@uffda)
New Member Member
Joined: 3 years ago
Posts: 4
Topic starter 11/03/2024 12:41 pm  

@editor No thanks 🙂



   
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