On Mon, 22 Mar 2004 19:58:14 GMT, in uk.d-i-y snipped-for-privacy@microsoft.com
> (Lurch) strung together this:
>
> >On 22 Mar 2004 05:32:21 -0800, in uk.d-i-y
> > snipped-for-privacy@daler-rowney.com (stevep) strung together this: > >
> >>I have a gravity fed HW and pumped CH system with a programable
> >>thermostat. If I have the thermostat programmed to come on all day
> >>inc. overnight then the boiler keeps tripping in to heat the water
> >>despite heat not being required for the CH.
> >>Can I fit a thermostat to the airing cupboard tank so that when the
> >>room temp is OK the boiler will not light up or is there some other > >>easy solution?
> >
> >There is nothing on the HW side of a gravity system that would bring
> >the boiler on, so it must be the room stat calling for heat.
>
> Now I've re-read the OP a couple of times I've decided that the above
> statement is utter nonsense. Sorry for having to make everyone read > it.
> On a more sane note, if the original two channel programmer is still
> wired in then the system could be altered so that a permanent feed is
> supplied to the programmable room stat, which then switches the boiler
> and pump on. And the HW channel of the programmer switches on the
> boiler only. The heating channel on the existing two channel
> programmer would be defunct.
Have been on holiday but thanks for this reply-it looks like this is the answer but how do I do it? I have a programable thermostat connected to a landis and gyr rwb2.9 mechanical programmer.