wrote:
If you particularly wanted to be able to force the heating on at a time
when the programmable stats are already satisfied, there is nothing
stopping you adding an override switch or programmer. A simple one that
has a "boost" facility would allow you to push one button and have the
heating run for an hour regardless of the stats being satisfied. However
I am not quite sure why you would want to do that unless you plan to
program the stats to a very low temperature for the bulk of the day when
you expect to be out, and need to account for unexpected periods of
occupation.

--


This is exactly what we wanted . However, I guess the programmable
room stats would turn a motorised valve on as well as firing the
boiler. In the case of hitting the boost button, the boiler may start
but the valves not open. Not sure if this is the way it works though?

You would connect your override button(s)/programmer across the contacts
of the room stat(s). That way it will fire the system/zone in exactly
the same way as the stat.

--
Cheers,

John.

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