On Sat, 9 Nov 2019 16:26:00 +0000, ARW
wrote:

snip

Its a cpmbi boiler with hot water on demand?

I think Adam was trying to be funny. I put HW/CH in the title because
the boiler does both so I threw that in *in case* there was some
special reason there wasn't a timer for the CH already.

Like a fridge needing the heat of an incandescent lamp or a boiler
coming on on it's own to prevent freezing etc.


You are talking ********:-)

Care to dig any deeper?

Cheers, T i m