Hi everyone
I have fitted a new trv (Yorkshire Fittings Mistral Bi-directional with
Tectite push connection 10mm and M31 head) in the conservatory radiator
(B&Q 4-column designer job). However I'm having problems as the trv
always cuts off far too early regardless of the setting and I have to
keep increasing the setting up to max at which point I disconnect the
head and let the valve open fully. This more than adequately heats the
room - great in the cold snaps but not so clever now! They also give
you a little plastic manual adjuster cap which you can tweak to open or
close the valve - again not ideal (and only for packing really).
I've emailed the company but no answer
Has anyone else come up against this one and any ideas as to a
solution? BTW the lockshield is about half open at the mo but I
started with it fully open - no real difference either way. Any
comments much appreciated!

In article .com,
halfjobharry wrote:
However I'm having problems as the trv
always cuts off far too early regardless of the setting and I have to
keep increasing the setting up to max at which point I disconnect the
head and let the valve open fully. This more than adequately heats the
room - great in the cold snaps but not so clever now!

Sounds like the heat from the rad is effecting it more than normal. I've
found mounting them horizontal sometimes helps.

Or you could try making some form of shield. You could probably prove this
theory by running a fan on slow directed at the valve.

Of course, it might just be faulty. Have you got another in the house you
could swop the top for?

--
*Why is the word abbreviation so long?

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

Thanks Dave - All my others are old Danfoss attached by a collar and
nut and bolt arrangement unlike the new one which is screwed down by a
threaded ring - so probably not compatible. I'm trying a shield at the
moment. The trv is vertical at the moment and there's a short
horizontal run of pipe up to the final elbow. It's just a circle of
cardboard round the pipe but no discernible effect. I suppose it could
be the heat from the rad itself so another shield is required.
Otherwise it's the PITA procedure of yet again draining the bugger to
change to horizontal! I thought the manufacturer would at least have
the grace to reply to my email or at best to test/replace the head, oh
well...
Dave Plowman (News) wrote:
In article .com,
halfjobharry wrote:
However I'm having problems as the trv
always cuts off far too early regardless of the setting and I have
to
keep increasing the setting up to max at which point I disconnect
the
head and let the valve open fully. This more than adequately heats
the
room - great in the cold snaps but not so clever now!

Sounds like the heat from the rad is effecting it more than normal.
I've
found mounting them horizontal sometimes helps.

Or you could try making some form of shield. You could probably prove
this
theory by running a fan on slow directed at the valve.

Of course, it might just be faulty. Have you got another in the house
you
could swop the top for?

--
*Why is the word abbreviation so long?

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