We've recently had a 'Continental' brand under floor heating system
installed which works very well indeed, however at times it whistles!

The noise emanates from the mixing / temperature setting valve on the
manifold and is at a very high pitch (top of the audio spectrum). If I
slightly adjust the setting, the noise stops, until (presumably) it comes
back to the new set point, when the noise starts up again. Has anyone else
experienced this with their system? I am about to contact the manufacturers,
but would like to be armed with more information if it is available.

AWEM

Some ordinary valves do this, its a kind of hiss with an hf whistle. I
always put it down to the restriction at the valve as its altered causing
turbulance in the water.
Brian

--
From the Sofa of Brian Gaff Reply address is active
"Andrew Mawson" wrote in message
...
We've recently had a 'Continental' brand under floor heating system
installed which works very well indeed, however at times it whistles!

The noise emanates from the mixing / temperature setting valve on the
manifold and is at a very high pitch (top of the audio spectrum). If I
slightly adjust the setting, the noise stops, until (presumably) it comes
back to the new set point, when the noise starts up again. Has anyone else
experienced this with their system? I am about to contact the
manufacturers, but would like to be armed with more information if it is
available.

AWEM

"Brian Gaff" wrote in message ...

Some ordinary valves do this, its a kind of hiss with an hf whistle. I
always put it down to the restriction at the valve as its altered causing
turbulance in the water.
Brian


Oh yes I'm sure that you are right - it's classic feedback oscillation. And
I'm equally sure the solution is to increase the damping on the valve, the
problem is how, as it's a sealed module as far as I can tell.

AWEM

On Sat, 16 Mar 2013 16:10:35 -0000, "Andrew Mawson"
wrote:

"Brian Gaff" wrote in message ...

Some ordinary valves do this, its a kind of hiss with an hf whistle. I
always put it down to the restriction at the valve as its altered causing
turbulance in the water.
Brian


Oh yes I'm sure that you are right - it's classic feedback oscillation. And
I'm equally sure the solution is to increase the damping on the valve, the
problem is how, as it's a sealed module as far as I can tell.

AWEM

Is it possible the valve has been installed incorrectly, with the
water flow reversed?

I understand that some TRVs whistle if fitted to the return side of a
radiator.



--
Graham.

%Profound_observation%

"Graham." wrote in message
...

On Sat, 16 Mar 2013 16:10:35 -0000, "Andrew Mawson"
wrote:

"Brian Gaff" wrote in message ...

Some ordinary valves do this, its a kind of hiss with an hf whistle. I
always put it down to the restriction at the valve as its altered
causing
turbulance in the water.
Brian


Oh yes I'm sure that you are right - it's classic feedback oscillation.
And
I'm equally sure the solution is to increase the damping on the valve, the
problem is how, as it's a sealed module as far as I can tell.

AWEM

Is it possible the valve has been installed incorrectly, with the
water flow reversed?

I understand that some TRVs whistle if fitted to the return side of a
radiator.



No the plumber checked that today

AWEM

Andrew Mawson wrote:
We've recently had a 'Continental' brand under floor heating system
installed which works very well indeed, however at times it whistles!

The noise emanates from the mixing / temperature setting valve on the
manifold and is at a very high pitch (top of the audio spectrum). If I
slightly adjust the setting, the noise stops, until (presumably) it
comes back to the new set point, when the noise starts up again. Has
anyone else experienced this with their system? I am about to contact
the manufacturers, but would like to be armed with more information
if it is available.

I had the same problem but now it's cured, try these first
http://snipurl.com/26mcwe1

"Phil L" wrote in message ...

Andrew Mawson wrote:
We've recently had a 'Continental' brand under floor heating system
installed which works very well indeed, however at times it whistles!

The noise emanates from the mixing / temperature setting valve on the
manifold and is at a very high pitch (top of the audio spectrum). If I
slightly adjust the setting, the noise stops, until (presumably) it
comes back to the new set point, when the noise starts up again. Has
anyone else experienced this with their system? I am about to contact
the manufacturers, but would like to be armed with more information
if it is available.

I had the same problem but now it's cured, try these first
http://snipurl.com/26mcwe1

Nice one. My wife has a similar solution in that she's lost her top register
hearing and can't hear it. The dogs and I can G

AWEM

On 17/03/2013 12:53 a.m., Andrew Mawson wrote:
We've recently had a 'Continental' brand under floor heating system
installed which works very well indeed, however at times it whistles!

The noise emanates from the mixing / temperature setting valve on the
manifold and is at a very high pitch (top of the audio spectrum). If I
slightly adjust the setting, the noise stops, until (presumably) it
comes back to the new set point, when the noise starts up again. Has
anyone else experienced this with their system? I am about to contact
the manufacturers, but would like to be armed with more information if
it is available.

AWEM

Maybe it's happy

On Sat, 16 Mar 2013 11:53:45 -0000, "Andrew Mawson"
wrote:

We've recently had a 'Continental' brand under floor heating system
installed which works very well indeed, however at times it whistles!

The noise emanates from the mixing / temperature setting valve on the
manifold and is at a very high pitch (top of the audio spectrum). If I
slightly adjust the setting, the noise stops, until (presumably) it comes
back to the new set point, when the noise starts up again. Has anyone else
experienced this with their system? I am about to contact the manufacturers,
but would like to be armed with more information if it is available.

AWEM

Without being anglegrinderish, have you considered, or is it possible
to clump it with a plastic hammer?

This can knock this irritating sort of thing into a different position
and shut it up for a while.

Andrew Mawson wrote:
We've recently had a 'Continental' brand under floor heating system
installed which works very well indeed, however at times it whistles!

The noise emanates from the mixing / temperature setting valve on the
manifold and is at a very high pitch (top of the audio spectrum). If I
slightly adjust the setting, the noise stops, until (presumably) it
comes back to the new set point, when the noise starts up again. Has
anyone else experienced this with their system? I am about to contact
the manufacturers, but would like to be armed with more information if
it is available.

AWEM
Can you try changing the pump speed? many have a three position
electrical speed control, nicer ones have a bypass valve in the water
path to give analogue control of flow.

Bob

On 16/03/2013 11:53, Andrew Mawson wrote:
We've recently had a 'Continental' brand under floor heating system
installed which works very well indeed, however at times it whistles!

The noise emanates from the mixing / temperature setting valve on the
manifold and is at a very high pitch (top of the audio spectrum). If I
slightly adjust the setting, the noise stops, until (presumably) it
comes back to the new set point, when the noise starts up again. Has
anyone else experienced this with their system? I am about to contact
the manufacturers, but would like to be armed with more information if
it is available.

My own self installed 4 zone system used to be a bit on the noisy side.
The manufacturer said the circulating pump should always be set to speed
3 (fastest) but once 2 zones have shut down the remaining zones/circuits
are too restrictive for full power and can make a little noise.

I dropped it down to the middle speed setting on the pump a few years
ago and it's fine. Still managed to get recommended flow rates on each
circuit when all were calling for heat and it cured the noise completely.

I don't know whether the (my) mixing/blending t/stat would whistle as
the supplied temperature is and always has been set lower then the
manifold 'stat.

You could try dropping the boiler temp down to 60 degrees (or less) and
set the manifold 'stat a few degrees higher just in case and see if it
provides enough output from the radiators (I presume you have a mix of
radiators and UFH)

My own radiators give more than enough heat at UFH temp 55 deg. and
they're not particularly over sized.

Cheers
Pete@

--
http://www.GymRatZ.co.uk - Gym Equipment suppliers to the toughest gyms.

Did you ever find out the cause/solution? We have just installed underfloor heating and the whistling is driving me mad

Did you bury Roger Whitaker under your floor?

Brian

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The Sofa of Brian Gaff...

Blind user, so no pictures please!
wrote in message
...
Did you ever find out the cause/solution? We have just installed
underfloor heating and the whistling is driving me mad

On Sat, 13 Jan 2018 08:45:17 -0000, "Brian Gaff"
wrote:

Did you bury Roger Whitaker under your floor?

Brian
Or Kaiser Bill's Batman


G.Harman

That was Whistling Jack Smith, who I understand did not really exist as an
act.
Brian

--
----- -
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please!
wrote in message
...
On Sat, 13 Jan 2018 08:45:17 -0000, "Brian Gaff"
wrote:

Did you bury Roger Whitaker under your floor?

Brian
Or Kaiser Bill's Batman


G.Harman