"Chris Tomlinson" wrote in message
.uk...
Hi,

Have a friend with a brand new Baxi Platinum 24HE "System Boiler", and I
need a new Combi boiler. They look identical, and the only difference we
can see is the diverter valve. In the Combi it should have a 'T' and in
his System one it just goes out to one outlet, to connect to a cylinder.

Is it just a matter of replacing that with a T from their Combi model,
does anyone know, or are there more complicated things to worry about?

There is temperature control as well. If you want to convert it to a
combi. Buy a plate heat exchanger, a flow switch, blending valve and an
electric 3-way "diverting" valve. Have the flowswitch on the cold mains to
the plate, when activated. it fires the boiler and diverts the 3-way valve
to send all the boilers flow to the plate. All the boilers output will go
through the plate heat exchanger. The blending valve will set the output
temperature. If you can get some of the components inside the case fine. I
think most would all be outside. Could be in the cupboard under the sink
well insulated.