Renewable Heating Hub Heat Pump Forums

Search with Wattson
Forums
Renewable Heating
Air Source Heat Pum...
Air in my radiators
 
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!

Air in my radiators

 
Air Source Heat Pumps (ASHPs)
Last Post by Gfletcher 4 years ago
5 Posts
2 Users
0 Reactions
6,727 Views
RSS
 Gfletcher
(@gfletcher)
Eminent Member Member
Joined: 4 years ago
Posts: 24
Topic starter 24/12/2022 3:29 pm   [#695]

Hi all, 

I had an ASHP installed back in June and I have been really happy with the performance, especially over the recent cold snap (averaged 26kWh electricity use a day for our 132m2 house). However, the radiators at the top of the house need bleeding every couple of weeks - is this normal? Where is the air getting in? 

We have a mitsubishi ecodan 8.5kW.

Cheers

Gavin



   
Quote
 Derek M
(@derek-m)
Illustrious Member Member
Joined: 6 years ago
Posts: 4425
24/12/2022 3:38 pm  

Posted by: @gfletcher
↑

Hi all, 

I had an ASHP installed back in June and I have been really happy with the performance, especially over the recent cold snap (averaged 26kWh electricity use a day for our 132m2 house). However, the radiators at the top of the house need bleeding every couple of weeks - is this normal? Where is the air getting in? 

We have a mitsubishi ecodan 8.5kW.

Cheers

Gavin

I assume that you are bleeding the air from the radiators, but are you also topping up the water in the system?

One reason could just be air in the system collecting at the highest point.

If the problem persist after bleeding and topping up, then suspect a water leak somewhere. Monitor the system pressure over a period of time, since a falling pressure could indicate a leak somewhere.

 



   
ReplyQuote
 Gfletcher
(@gfletcher)
Eminent Member Member
Joined: 4 years ago
Posts: 24
Topic starter 24/12/2022 4:40 pm  

Hi Derek,

Thanks for the reply. Yes, I am topping up after bleeding. The pressure doesn't drop until I bleed the rads - but since installation I have been having to bleed and then top up every 2-4 weeks. 

So presumably it is sounding like a leak somewhere - I'll keep monitoring and contact the installer if it persists.

Cheers
Gavin



   
ReplyQuote
 Derek M
(@derek-m)
Illustrious Member Member
Joined: 6 years ago
Posts: 4425
24/12/2022 4:58 pm  

Posted by: @gfletcher
↑

Hi Derek,

Thanks for the reply. Yes, I am topping up after bleeding. The pressure doesn't drop until I bleed the rads - but since installation I have been having to bleed and then top up every 2-4 weeks. 

So presumably it is sounding like a leak somewhere - I'll keep monitoring and contact the installer if it persists.

Cheers
Gavin

I am assuming that you did not run the central heating until the weather turned cooler. The fact that the pressure does not drop in normal operation, would indicate that you do not have a leak.

Do you get a 'tinkling' sound when the water is being pumped around the system? Air can be trapped in sections of the system when it is filled, and it can take some time for this air to accumulate in places where it can be removed easily.

Do you have any air release vents on your system? They will possibly be a small brass cylinder, often with a red plastic cap on the top. If you find any gently loosen the red cap to see if any air comes out.

If you Google 'Air Release Valve' it will give you some idea what to look for.

 



   
ReplyQuote
 Gfletcher
(@gfletcher)
Eminent Member Member
Joined: 4 years ago
Posts: 24
Topic starter 24/12/2022 5:14 pm  

Thanks for the additional info - yes, some small tinkling noises, and yes, only started using properly at the start of Nov. We do have air release valves. I'll keep an eye on it.

Cheers

Gavin



   
ReplyQuote
Forum Jump:
  Previous Topic
Next Topic  
Share:

SPONSORS

Join Us!

Installer Finder

Degrees of Separation

Latest Posts

SPONSORS

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