Could this be the cause of our noisy heating system?

[Beau]

Our  ASHP system has been in just under a year. When running the first couple of rads are noisy. I was resigned to this as there's no obvious fault but that changed today.  Doing some work under the floors  and noticed these creased pipes. They reused some ancient pipes they found which got around some awkward steps but it looks like these old pipes were badly creased whenever they were put in. These creases are just after the noisy rads. My thinking is the restrictions are forcing most of the water through the rads which are prior to the damage and the high flow rates are making the radiators noisy.

 

Is this the likely cause or am I reading too much into this?

Edited July 20 by Beau

[Nickfromwales]

Were they paid for a full, brand new install, or did they reuse some/all of the existing stuff? If you know 100% that they knowingly used damaged pipes then call them back to cut the sections out and renew them.

 

Can't say that would be the cause of noisy rads, but I also can't say it's not.....probably more down to balancing tbh.

[Beau]

Yes they were paid to do a brand new install. Those pipes are remnants from a heating system that was put in and removed back in the 70s.  I knew they had used these short sections at the time but I was not aware of the kinks in the pipes. I dont think they will make any fuss about coming back to sort this out as they seem a decent outfit. 

[marshian]

23 hours ago, Nickfromwales said:

Can't say that would be the cause of noisy rads, but I also can't say it's not.....probably more down to balancing tbh.

 

Or too high a pump speed for the system volume and lockshields screwed down to slow the flow (aka "balancing not balancing")

 

One of my pet hates is system noise - I won't repeat the post I wrote around pump getting blocked up with magnetite resulting on the need to run the pump as twice the previous speed and generating a lot more system noise as a result

 

But this was the pump impeller and once cleaned up I was able to revert to the previous min speed and had a perfectly quiet system again......

 

 

 

 

[Beau]

"Or too high a pump speed for the system " Not something I can adjust as far as I know. Its all under the control of the Vaillant Arotherm ASHP

[JohnMo]

1 hour ago, Beau said:

"Or too high a pump speed for the system " Not something I can adjust as far as I know. Its all under the control of the Vaillant Arotherm ASHP

This may or may not make useful reading 

https://community.openenergymonitor.org/t/vaillant-arotherm-owners-thread/21891/30

[sharpener]

2 hours ago, Beau said:

"Or too high a pump speed for the system " Not something I can adjust as far as I know. Its all under the control of the Vaillant Arotherm ASHP

 

By default the pump speed is set to "Auto" but you can adjust it on the white Interface Unit, worth experimenting. But very likely there is flow noise caused by turbulence at the kinks. and this is then radiated into the room by the nearest radiators to them.

[Beau]

16 hours ago, sharpener said:

 

By default the pump speed is set to "Auto" but you can adjust it on the white Interface Unit, worth experimenting. But very likely there is flow noise caused by turbulence at the kinks. and this is then radiated into the room by the nearest radiators to them.

Frustratingly the white interface is now boxed in as I was told I wouldn't need to touch it. 

 

Fingers crossed the kinked pipes are the problem as they are coming to replace them at the end of the month

 

 

[sharpener]

3 hours ago, Beau said:

Frustratingly the white interface is now boxed in as I was told I wouldn't need to touch it. 

 

Poor advice! There is a lot of useful diagnostic information available in its Live Monitor function which is not available on the app. E.g. actual flow rate, current flow temp vs target, % compressor modulation depth. Also a Reset button which has been known to get you out of trouble.

 

3 hours ago, Beau said:

Fingers crossed the kinked pipes are the problem as they are coming to replace them at the end of the month

 

Result. Let's hope so.

[Beau]

4 hours ago, sharpener said:

 

Poor advice! There is a lot of useful diagnostic information available in its Live Monitor function which is not available on the app. E.g. actual flow rate, current flow temp vs target, % compressor modulation depth. Also a Reset button which has been known to get you out of trouble.

 

 

 

To be honest I dont even use or have the app as I get lost with all the variables. Not having the option to do more things I dont do is not a loss haha. The boxing in can be removed relatively easily if necessary. Probably 30mins of fiddling about but in hindsight would have mounted it in a more accessable place but was rushed into making a decision when the install was happening