"visionset" wrote in message
...

"John" wrote in message
...
I should have asked the installer but he's now away on holiday (

Anyway, just had an Alpha boiler installed (CD32C) and wireless room
stat/programmer/timer thingy. The boiler itself has a thermostat numbered
0-9, there's the room stat, and then all the rads except one have
thermostatic valves. Which thermostat takes priority and what should the
one
on the boiler be set at?


Boiler thermostat sets the temp the water is heated to. Set to achieve
about 80°C (prob about 7 on your scale). Room thermostat controls the
room temp (of that room) the boiler cuts out at and as such should have
been placed in a sensible room that is not heated another way. I set mine
at 20°C but something you're comfortable with, the others TRV's on the
rads take up the difference since different parts of the house will cool
and heat up at different rates, so these will all be trial and error to
achieve temps appropriate for the room, ie lounge hot and bedroom cool.
So long as you understand the basis of the setup I have explained the rest
is trial and error for your house. Have your rads been balanced, now is
the time to do that: http://www.diyfaq.org.uk/plumbing/rad-balance.html

--

Thanks Mike, a couple of interesting points there. We've had a whole new CH
system fitted (not just a replacement boiler) so yes, he balanced the rads
as part of the job. Because it was done in the summer and we've not needed
the heating on before now, we've only just noticed a problem in that he
mounted the room stat in the lounge, which is the hottest room in the house
because of the TV, the fire, the computer and the three people who usually
sit in it

The stat is wireless so can be easily moved to another room but I remember
reading somewhere that there should always be one rad in the system that
doesn't have a TRV and that the stat is usually in that room, which in our
case, it is - the radiator in the lounge is the one that doesn't have a TRV.
So can the room stat safely be mounted in another room?

John.