Renewable Heating Hub Heat Pump Forums

Search with Wattson
Forums
Renewable Heating
Thermostats, Volumi...
Buzzing noise from ...
 
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!

Buzzing noise from UFH manifold

 
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Last Post by Derek M 4 years ago
5 Posts
3 Users
0 Reactions
5,270 Views
RSS
 novemberRomeo
(@novemberromeo)
Trusted Member Member
Joined: 5 years ago
Posts: 33
Topic starter 12/01/2023 10:27 pm   [#741]

Our heat pump was installed in November 21 and was connected to our existing UFH system. All has been working well, but in the last week or two I’ve noticed a loud buzzing noise coming from the UFH manifold when the kitchen is calling for heat. 

it’s a strange noise, it reminds me of an old dot matrix printer printing. I’ve uploaded a clip so you can hear what I mean:

https://youtube.com/shorts/F5N6KFYcJw8?feature=share

does anyone have any ideas what is causing the noise, and what I should do to stop it? As far as I can tell, the heating is still working as normal  

i’ve discovered that turning the flow rate valve on the kitchen supply does temporarily stop the noise, but when I put it back to the original position the noise starts again after a short while. 



   
Quote
 AllyFish
(@allyfish)
Prominent Member Contributor
Joined: 4 years ago
Posts: 520
13/01/2023 9:49 am  

Wow! ASHPs need to deliver more flow than conventional fired boiler heating systems, as they operate a much lower delta T supply and return temperature. For many retrofits, including wet rad and UFH, that usually means the existing piping system ends up with higher velocities than before. Velocities above certain speeds will start to generate audible noise. It's not normally practical to increase the piping sizes for retrofits, so you may have to adjust some flow rates to stop noisy valves and pipework where the flow is higher.



   
ReplyQuote
 novemberRomeo
(@novemberromeo)
Trusted Member Member
Joined: 5 years ago
Posts: 33
Topic starter 13/01/2023 10:25 am  

That makes sense, but I don't see why it would only start making a noise now - 14 months after installing the system.  Up until now it's been running fine without any noise.  I was wondering whether it could be the sound of air in the system, or something like that? Maybe that is a non-issue for these systems?  We have no radiators, UFH throughout.



   
ReplyQuote
 AllyFish
(@allyfish)
Prominent Member Contributor
Joined: 4 years ago
Posts: 520
13/01/2023 11:20 am  

Maybe a bit of wear and tear? Bleed the system of air, it's not something you want in the system. I have one TRV that quietly 'sings' when it modulates down, and it's in our bedroom!!



   
ReplyQuote
 Derek M
(@derek-m)
Illustrious Member Member
Joined: 6 years ago
Posts: 4425
13/01/2023 6:37 pm  

Posted by: @novemberromeo
↑

That makes sense, but I don't see why it would only start making a noise now - 14 months after installing the system.  Up until now it's been running fine without any noise.  I was wondering whether it could be the sound of air in the system, or something like that? Maybe that is a non-issue for these systems?  We have no radiators, UFH throughout.

You have partially answer the question yourself, in that it has been working fine for 14 months without making any noise, so I don't think that the actual pipework may be at fault.

Is the noise coming from the flow regulation valve or the valve associated with the solenoid valve?

I am not that familiar with UFH systems, but it sounds like it could be some debris inside the valve or some part of the valve internals is working loose.

Is it still under warranty?

 



   
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