On Wed, 16 Nov 2005 01:56:33 +0000, Fatboise wrote:


I have 5 motorised valves in my house and want the fifth motorised to
switch on when all four of the other motorised valves switch off, if
one of the four motorised valves is on the fifth motorised valve must
remain closed.

Any suggestions appreciated............I'm thinking of smoe sort of
relay??

I suspect that you might be looking for an automatic bypass?

If you are seriously lucky all the 4 valves might have the white wire as
Set Square mentioned.

If they don't (almost certainly the case) you would need a simple mains
replay unit to generate the opposite of the boiler demand which you can
then feed to the 5th valve.


--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at http://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