Forums

Forums
Renewable Heating
Air Source Heat Pum...
The good, the bad a...
 
Notifications
Clear all

The good, the bad and the not that great – my heat pump installation

 
Page 13 / 19
Air Source Heat Pumps (ASHPs)
Last Post by cathodeRay 3 months ago
224 Posts
15 Users
77 Reactions
28.1 K Views
RSS
Burtis
 Burtis
(@burtis)
Reputable Member Member
Joined: 1 year ago
Posts: 109
Topic starter 02/12/2024 11:02 am  

@cathoderay full heat cycle in 5 minute intervals from 25⁰ to just before it hit 45⁰ 

Flow basically stayed at 0.5M³/h

Temp difference between plates seems stable at 7 or 8

Last few I added in all the other data when it was maxed out near enough at 59⁰c

 

I've got very limited understanding of anything beyond the basics so please be gentle 😅


This post was modified 1 year ago by Burtis

   
ReplyQuote
cathodeRay
 cathodeRay
(@cathoderay)
Illustrious Member Moderator
Joined: 4 years ago
Posts: 2411
02/12/2024 11:29 am  

@burtis - we can see the flow rate stays much the same throughout, and the LWT/RWT rise (from 39/32 to 59/52, about what I would expect for a DHW reheat based on what my system does, see beloe), as does the DHW tank temp (to 44 max? If so what it your target DHW?), but can you give some idea of the time line? Here's yesterday's DHW reheat on my system (DHW tank temp not on chart, but it got to 50 degrees C, my target temp, in ~30 minutes): 

image

 


Midea 14kW (for now...) ASHP heating both building and DHW


   
ReplyQuote
cathodeRay
 cathodeRay
(@cathoderay)
Illustrious Member Moderator
Joined: 4 years ago
Posts: 2411
03/12/2024 12:01 pm  

Posted by: @burtis
↑

full heat cycle in 5 minute intervals from 25⁰ to just before it hit 45⁰ 

And total duration, as I can't see the time anywhere, to get from 20 to 45 degrees DHW tank temp?

Agree the flow rate effectively remains constant.

The maxing out at just under 60 degrees LWT is what I get too, see above chart.


Midea 14kW (for now...) ASHP heating both building and DHW


   
ReplyQuote



Burtis
 Burtis
(@burtis)
Reputable Member Member
Joined: 1 year ago
Posts: 109
Topic starter 03/12/2024 12:52 pm  

@cathoderay sorry forgot to add that around 40 mins



   
ReplyQuote
cathodeRay
 cathodeRay
(@cathoderay)
Illustrious Member Moderator
Joined: 4 years ago
Posts: 2411
03/12/2024 1:00 pm  

Posted by: @burtis
↑

sorry forgot to add that around 40 mins

That's actually not too bad, or, to put it another way, your heat pump can output enough heat to heat your DHW tank at an acceptable rate. The Freedom annual service manual includes a similar test, how many degrees the heat pump can raise the DHW by over 30 mins. I suspect your heat pump would pass this basic test. But of course the DHW performance tells us nothing about the space heating performance...


Midea 14kW (for now...) ASHP heating both building and DHW


   
👍
1
ReplyQuote
Burtis
 Burtis
(@burtis)
Reputable Member Member
Joined: 1 year ago
Posts: 109
Topic starter 05/12/2024 9:00 am  

 

SMALL UPDATE...

This morning I have had Daniel from MCS reply solid bloke trying to help. 

Basically he emailed NAPIT (29th Nov) saying the inspection I had was basic and is not a get out of jail free card for issues with the system the inspector missed or issues that are presenting themselves. 

Sooo back to contacting NAPIT this morning to see what's what. 

I did reach out to the installer on the 29th of November to see if they wanted to finish the install and do the right thing and sort their flaws but have not had a reply from them either. 



   
ReplyQuote
Mars
 Mars
(@editor)
Illustrious Member Admin
Joined: 5 years ago
Posts: 3792
05/12/2024 9:27 am  

@burtis this game of ping pong is what I’ve found ludicrous in the complaints process, and no one wants to take responsibility.


Get a copy of The Ultimate Guide to Heat Pumps

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


   
😢
1
ReplyQuote
Burtis
 Burtis
(@burtis)
Reputable Member Member
Joined: 1 year ago
Posts: 109
Topic starter 05/12/2024 9:40 am  

@editor 

Seems like it's going that way buddy. 

Near 3 months as well not including the months prior to this I've been asking the installer to sort things out....

The worst thing is I just don't have and money to sort it or it would probably take me a year or so to save up enough to pay another company to come in and make it right. 

The only saving grace is that it actually works other than randomly chucking up flow fault codes



   
ReplyQuote
Toodles
 Toodles
(@toodles)
Illustrious Member Contributor
Joined: 3 years ago
Posts: 2320
05/12/2024 9:44 am  

@burtis Your final paragraph is what is allowing your installer to ‘get away with it’. What is the next stage having exhausted the usual lines of enquiry / complaint -Ombudsman??? Toodles.


This post was modified 1 year ago by Toodles

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


   
ReplyQuote



Burtis
 Burtis
(@burtis)
Reputable Member Member
Joined: 1 year ago
Posts: 109
Topic starter 05/12/2024 9:49 am  

@toodles 

I'm still in the NAPIT stage so will have to wait and see then back to MCS to see where we can go from there. 

I wish I paid on credit card 😅


This post was modified 1 year ago by Burtis

   
ReplyQuote
Burtis
 Burtis
(@burtis)
Reputable Member Member
Joined: 1 year ago
Posts: 109
Topic starter 05/12/2024 9:54 am  

@cathoderay 

Don't know if you have a idea. 

My circulation pump next to the buffer is set to max in theory 3.5m³/H

The heat pump is pushing 0.5m³/H

So in theory to balance them better I should drop the pump output?? 

Imagine it's more complex than that thought 😅



   
ReplyQuote
Toodles
 Toodles
(@toodles)
Illustrious Member Contributor
Joined: 3 years ago
Posts: 2320
05/12/2024 10:10 am  

@burtis I think you will have to nickname the people involved Zebidee, Ermintrude, Dillon and Mr. McHenry… 😉 Toodles.


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


   
😂
1
ReplyQuote
Page 13 / 19
Forum Jump:
  Previous Topic
Next Topic  



Share:

Join Us!

Podcast Picks

Latest Posts

Click to access the login or register cheese
x Powerful Protection for WordPress, from Shield Security
This Site Is Protected By
ShieldPRO →