On Mon, 23 Jan 2006 01:05:47 +0000, Geronimo W. Christ Esq wrote:

My understanding is that this is a matter of adding two motorized
valves, one to open the HW circuit and one to open the CH circuit -
then drop in the programmer and bob's your uncle.

Or a single three way valve, depending on the plumbing and boiler this
may be an easier option. Does the boiler require a bypass if fitted
into a fully pumped system?

Alternatively, the present timeswitch obviously sends a control
signal up to switch on the pump which is right beside the cylinder.
I guess it just switches mains onto it. I wonder could that
arrangement be reversed;

The only box that doesn't need to be close to the valves/pump is the
room stat. Get a programable and wireless one and a single channel
wired programmer for the HW. "Reversing" the cable between pump and
boiler is not a problem as such but where does the system currently
pick up its mains supply?

--
Cheers
Dave. pam is missing e-mail