On Sun, 17 Oct 2004 18:40:11 +0100, Hugo Nebula wrote:

On Sun, 17 Oct 2004 12:51:08 GMT, a particular chimpanzee named
"Stephen Dawson" randomly hit the
keyboard and produced:

What sort of boiler is it, some ahve bypass vlaves fitted as standard.

It's an Ideal Classic. The installation guide says that a by-pass
circuit or by-pass valve must be fitted, which implies that there
isn't one already. Would a Thorn boiler of the 1970's have had an
integral by-pass or flow switch?

I was about to respond to your earlier posts and say 'it depends on the
boiler'. In this case if the makes say it needs a bypass that's what it
needs.

As for the previous installation: It would be have been noteworthy to have
had a flow switch. It could conceivably have had a bypass if it had had
S-plan controls or equiv. However with an installation of that period it
is much more likely that it used the
HW cylinder coil as the bypass and it always heated the HW when the CH was
on.

--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at www.diyfaq.org.uk
Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html
Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html