Renewable Heating Hub Heat Pump Forums

Search with Wattson
Forums
Renewable Heating
Air Source Heat Pum...
What is the best ai...
 
Notifications
Clear all

Joining the Renewable Heating Hub forums is completely free and only takes a minute. By registering you’ll be able to ask questions, join discussions, follow topics you’re interested in, bookmark useful threads and receive notifications when someone replies. Non-registered members also do not have access to our AI features. When choosing your username, please note that it cannot be changed later, so we recommend avoiding brand or product names. Before registering, please take a moment to read the Forum Rules & Terms of Use so we can keep the community helpful, respectful and informative for everyone. Thanks for joining!

What is the best air source heat pump setup?

 
Air Source Heat Pumps (ASHPs)
Last Post by bontwoody 3 years ago
2 Posts
2 Users
2 Reactions
1,594 Views
RSS
 Paulcoop
(@paulcoop)
New Member Member
Joined: 3 years ago
Posts: 1
Topic starter 25/02/2023 7:55 am   [#858]

I've had a HP as part on a house renovation 2 years ago. ( full spec in attached pic ) this winter season I've Been playing around with the setting but never really found the sweet spot snd also a few bits baffle me . Be great to hear your views. It's a simple ASHP to underfloor system. 

1st up it doesn't matter what heat setting I have it on ( target flow temp or compensation) the floor temp struggles to get past 35/ 36 max regardless of the outside temp. I'd like it to race up 40 plus or say 45. What would be limiting this ?  I can get it up to 40 but I have to lower the flow rate to 8lpm. This however creates a return temp of 28 hence a over gap of 12 or higher which I believe is " wrong " 

Next up.for the Heat pump spec ( pic attached) is there a maximum Litre per minute flow rate I can use before causing damage ? Is there such a thing ? I ask as its currently at 15 but easily go higher.

Looking at the set up you can see a pressure value on the right of the manifold.  The setting on thus seems irrelevant as it appears to be fitted upside down and hence always open . The pipe between the flow and return get hot. Is this an issue ? 

The temperature readings on flow and return on the manifold seem very different to what is displayed on the FTC5 controller.  I'm not sure which ones to use for delta t ? 

Any help would be great . Thank you 

Paul

Screenshot 20230225 060030 Photos
Screenshot 20230225 062116 Photos
Screenshot 20230225 060146 Photos
20230225 064813
20230225 064827

 

 

 

 

 

 

 



   
Quote
bontwoody
 bontwoody
(@bontwoody)
Noble Member Contributor
Joined: 4 years ago
Posts: 1009
25/02/2023 10:12 am  

Hi Paul, Im no expert but I think I had the same ASHP and an UFH system which I installed in my old house. First up you have a 5kW ecodan? The room in the picture looks large, were proper heat loss calculations done and if so what was the expected heat loss? The reason I ask is that it would seem a limiting factor if the ASHP was undersized? Just to check as well that you dont have a mixer valve on the UFH as this would blend the temperature down. I took mine out when I realised. Hope that is of some help.

Mark


House-3 bed partial stone bungalow, 5kW Samsung Gen 6 ASHP (Self install)
6.9 kWp of PV
5kWh DC coupled battery
Blog: https://thegreeningofrosecottage.weebly.com/
Heatpump Stats: http://heatpumpmonitor.org/system/view?id=60


   
👍
2
ReplyQuote
Forum Jump:
  Previous Topic
Next Topic  
Share:

Join Us!

Latest Posts

Click to access the login or register cheese
Protected By
Shield Security PRO