John Rumm wrote in
o.uk:

On 27/12/2018 19:14, John wrote:
swapping a single channel programmer for a 2 channel as the hot water
is continually on is this a easy enough task to do the controller on
the system
is a drayton tempus 1

What type of boiler? (e.g. Heating only, system, combi etc)

What kind of zoning does the system have? (see [1])

[1]
http://wiki.diyfaq.org.uk/index.php/...ols_and_Zoning

Lastly what are you trying to achieve? (i.e. the ability to *not* heat
the water?)



Would having a cylinder thermostat be a more sensible solution?