"Dave Baker" wrote in message
...
The electrickery bits of central heating are absolutely not my thing
but I
can't see why, with any boiler, you can't have an external
controller
driving the zone valves and stats which produces a single output to
the
boiler telling it when to switch on. Even if you had to set the
boiler to be
on 24/7 with its own controls it would still only fire up when it
got a stat
signal saying the temperature was low enough. If the external
controller
sends this signal rather than having the stat itself wired directly
to the
boiler why wouldn't it work?

Maybe I'm missing something obvious but as I say, I really don't do
electrics.
--
Dave Baker - Puma Race Engines



That's precisely how my Potterton Kingfisher 150CF is wired up. No
electronics in it at all, just a pc based external controller doing
zone control on 8 zones. The actual boiler went in in 1985 and is
working well, though the controller is a bit newer having run since
about 1998.

AWEM