To set the thermostatic radiator valves.

With the room at the desired temp, listen to the flow of water through the
valve with the stethoscope. Slowly turn the valve down until you hear it
just come to a stop.

I find that about 1/10 of the rotation between the numbered divisions is
significant.

In article 6,
DerbyBorn writes:
To set the thermostatic radiator valves.

With the room at the desired temp, listen to the flow of water through the
valve with the stethoscope. Slowly turn the valve down until you hear it
just come to a stop.

I find that about 1/10 of the rotation between the numbered divisions is
significant.

With the TRV4's, I find that you can feel the rotational resistance
change as you move it towards the point where it's pushing the valve
plunger closed, which is the current temperature.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]

On Sun, 18 Dec 2016 13:27:30 GMT, DerbyBorn
wrote:

To set the thermostatic radiator valves.

With the room at the desired temp, listen to the flow of water through the
valve with the stethoscope. Slowly turn the valve down until you hear it
just come to a stop.

Clever. ;-)

I find that about 1/10 of the rotation between the numbered divisions is
significant.

Agreed. I setup an elderly neighbours stat-valves the other way round.
I closed all the doors then turned all the stat valves off and let
everything cool down. Then I opened each up till the rad started to
run warm according to my IR thermometer.

Then I went round the house a few more times at hourly intervals
(keeping all the doors closed) and tweeks the valves accordingly for
each room.

It would have been nice to hear the opening point of each valve though
as there was a bit of a delay when using the IR thermometer.

Do you think one of the stethoscopes with the long rod they use for
listening to engine / machine noises would work equally well as I
already have one of those?

Cheers, T i m

On Sunday, 18 December 2016 14:56:07 UTC, T i m wrote:
Agreed. I setup an elderly neighbours stat-valves the other way round.
I closed all the doors then turned all the stat valves off and let
everything cool down. Then I opened each up till the rad started to
run warm according to my IR thermometer.

Then you superglued the valves to stop fiddling?

Owain

On Sunday, 18 December 2016 14:56:07 UTC, T i m wrote:
On Sun, 18 Dec 2016 13:27:30 GMT, DerbyBorn
wrote:

To set the thermostatic radiator valves.

With the room at the desired temp, listen to the flow of water through the
valve with the stethoscope. Slowly turn the valve down until you hear it
just come to a stop.

Clever. ;-)

Clever, but wrong. The TRV wants to be set to the point where the rad delivers the amount of power the room requires to stay at that temp, which is not trivial to measure.


NT

On Sun, 18 Dec 2016 07:31:29 -0800 (PST),
wrote:

On Sunday, 18 December 2016 14:56:07 UTC, T i m wrote:
Agreed. I setup an elderly neighbours stat-valves the other way round.
I closed all the doors then turned all the stat valves off and let
everything cool down. Then I opened each up till the rad started to
run warm according to my IR thermometer.

Then you superglued the valves to stop fiddling?


Nearly, they were lockshield valves (if that's the right name) so once
set they were 'locked' and seem to have resisted tampering ever since.
;-)

Cheers, T i m

On Sun, 18 Dec 2016 07:56:55 -0800 (PST), wrote:

On Sunday, 18 December 2016 14:56:07 UTC, T i m wrote:
On Sun, 18 Dec 2016 13:27:30 GMT, DerbyBorn
wrote:

To set the thermostatic radiator valves.

With the room at the desired temp, listen to the flow of water through the
valve with the stethoscope. Slowly turn the valve down until you hear it
just come to a stop.

Clever. ;-)

Clever, but wrong.

Ok?

The TRV wants to be set to the point where the rad delivers the amount of power the room requires to stay at that temp, which is not trivial to measure.

Quite, so what did he do wrong that stopped that happening (and one
assumes it did happen or he wouldn't have posted the process here?),
and without any 'measurement' as such?

Bottom line ... if each rad sets each room to the required temperature
and keeps it there, hasn't the process worked?

Cheers, T i m

On 18/12/2016 14:56, T i m wrote:
Do you think one of the stethoscopes with the long rod they use for
listening to engine / machine noises would work equally well as I
already have one of those?

In days gone by I just used a long screwdriver to listen to the engine.
blade on engine and ear on handle.

In article ,
ss wrote:
On 18/12/2016 14:56, T i m wrote:
Do you think one of the stethoscopes with the long rod they use for
listening to engine / machine noises would work equally well as I
already have one of those?

In days gone by I just used a long screwdriver to listen to the engine.
blade on engine and ear on handle.

+1

--
from KT24 in Surrey, England

On Sun, 18 Dec 2016 16:53:38 +0000, ss wrote:

On 18/12/2016 14:56, T i m wrote:
Do you think one of the stethoscopes with the long rod they use for
listening to engine / machine noises would work equally well as I
already have one of those?

In days gone by I just used a long screwdriver to listen to the engine.
blade on engine and ear on handle.

Me too, this is better though. ;-)

Cheers, T i m

On Sunday, 18 December 2016 16:12:50 UTC, T i m wrote:
On Sun, 18 Dec 2016 07:56:55 -0800 (PST), tabbypurr wrote:
On Sunday, 18 December 2016 14:56:07 UTC, T i m wrote:
On Sun, 18 Dec 2016 13:27:30 GMT, DerbyBorn
wrote:

To set the thermostatic radiator valves.

With the room at the desired temp, listen to the flow of water through the
valve with the stethoscope. Slowly turn the valve down until you hear it
just come to a stop.

Clever. ;-)

Clever, but wrong.

Ok?

The TRV wants to be set to the point where the rad delivers the amount of power the room requires to stay at that temp, which is not trivial to measure.

Quite, so what did he do wrong that stopped that happening (and one

he set flow to zero at the desired temp.

assumes it did happen or he wouldn't have posted the process here?),
and without any 'measurement' as such?

Bottom line ... if each rad sets each room to the required temperature
and keeps it there,

he didn't


NT

On Sun, 18 Dec 2016 14:58:10 -0800 (PST), wrote:

On Sunday, 18 December 2016 16:12:50 UTC, T i m wrote:
On Sun, 18 Dec 2016 07:56:55 -0800 (PST), tabbypurr wrote:
On Sunday, 18 December 2016 14:56:07 UTC, T i m wrote:
On Sun, 18 Dec 2016 13:27:30 GMT, DerbyBorn
wrote:

To set the thermostatic radiator valves.

With the room at the desired temp, listen to the flow of water through the
valve with the stethoscope. Slowly turn the valve down until you hear it
just come to a stop.

Clever. ;-)

Clever, but wrong.

Ok?

The TRV wants to be set to the point where the rad delivers the amount of power the room requires to stay at that temp, which is not trivial to measure.

Quite, so what did he do wrong that stopped that happening (and one

he set flow to zero at the desired temp.

Ok.

assumes it did happen or he wouldn't have posted the process here?),
and without any 'measurement' as such?

Bottom line ... if each rad sets each room to the required temperature
and keeps it there,

he didn't

So you think he posted here that he failed to achieve his goal?

Cheers, T i m

ss wrote:
On 18/12/2016 14:56, T i m wrote:
Do you think one of the stethoscopes with the long rod they use for
listening to engine / machine noises would work equally well as I
already have one of those?

In days gone by I just used a long screwdriver to listen to the engine.
blade on engine and ear on handle.

I find a piece of plastic tube is good for this. You can reach more
places, too.

Far better than either full on or off as many houses seem to use them.

Perhaps I simplified my note a little - I am not turning it hard off. I can
hear a very slight flow past the valve at my setpoint.

On Mon, 19 Dec 2016 12:07:19 GMT, DerbyBorn
wrote:

Far better than either full on or off as many houses seem to use them.

Quite. For my instance the house doesn't have an air-stat, just
relying on the stat-valves for the CH and a cylinder stat for the HW.

Perhaps I simplified my note a little - I am not turning it hard off. I can
hear a very slight flow past the valve at my setpoint.

The thing is, some of us didn't need it explaining any further as we
would have used fuzzy logic to work out it must have worked for you or
you wouldn't have posted the process here (although to be fair to NT
you did say you turned the valve off till it you heard it stop). [1]

Whilst I'm sure there are a number of 'perfect' roles for more literal
people, I can't think of one right now but an example of a bad fit
would be in telephone tech support for pensioners. ;-)

The number of times I've heard 'there is nothing on my PC screen' when
there is an active mouse pointer or spinning wheel etc.

Cheers, T i m

[1] This is why I hate writing out literal instructions for people
(where the procedure isn't precise or complex as such) preferring to
give people a better understanding of what is going on so that they
can work it out for themselves, should things not be *exactly* the
same when they go to do it. 'Teach a man how to fish ... ' etc.

In article ,
ss writes:
On 18/12/2016 14:56, T i m wrote:
Do you think one of the stethoscopes with the long rod they use for
listening to engine / machine noises would work equally well as I
already have one of those?

In days gone by I just used a long screwdriver to listen to the engine.
blade on engine and ear on handle.

It's always been popular, but frowned upon because of a number of
cases where it slipped onto a moving part and was hammered through
the skull.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]

In article ,
Andrew Gabriel wrote:
In days gone by I just used a long screwdriver to listen to the engine.
blade on engine and ear on handle.

It's always been popular, but frowned upon because of a number of
cases where it slipped onto a moving part and was hammered through
the skull.

There are disposable stethoscopes you can buy from a medical supplier. And
fairly cheap normal ones. But the plastic tube to one ear trick works
pretty well.

--
*El nino made me do it

Dave Plowman London SW
To e-mail, change noise into sound.