In message , Dave Fawthrop
writes
On 30 Aug 2005 01:32:45 -0700, "Matt Beard" wrote:

| At a guess I would think that most would cope fine as long as that pipe
| used to short the circuit had a radiator in it. I would think that
| nasty things could happen if it is just a short bit of pipe - it
| wouldn't take much for the boiler firing the heating circuit up to lead
| to superheated water ( 100C).
|
| What boiler is it?

Not chosen it yet.

In that case I very much doubt that there are any condensing boilers
which will allow DHW without there being pressure in the CH circuit

--
geoff