In message , Neil Barker
writes
I have one of these:-

http://www.zen58589.zen.co.uk/st699.pdf

controlling my central heating/hot water.

Works OK, but it will not allow independant hot water/heating, just
both together and therefore I want to fit a different kind, which I
already have.

Well, actually it will IIRC

The two channels will run independently of each other

The reason for the interlock lies elsewhere



Problem is that I can't manage to release it from its sub-base which is
mounted on the wall - the manual says that, "it can be removed if
required by depressing the locking catch with a screwdriver".

There are two catches at the top and a release catch underneath. Insert
a screwdriver in the slot and it comes off bottom first


All fine and dandy, but where is the locking catch ?

Thanks.


--
geoff