On 08/10/2020 15:03, Roland Perry wrote:
In message , at 12:16:55 on Thu,
8 Oct 2020, Theo remarked:
Roland Perry wrote:
Currently I have a boiler with a controller that simply turns it on (for
CH) during pre-programmed hours. Rads have thermostatic valves.

I'd like to add a room thermostat in the living room [running additional
wiring isn't an issue] but need to know if it can simply be put in
series with the timer-control.

AIUI traditional boiler wiring has the timer and thermostat operate
(relay)
contacts in series to interrupt the mains to the boiler.Â* So an
additional
thermostat in series would turn the heating off when it has deemed it
up to
temperature.Â* It wouldn't allow a call for heat if an existing thermostat
or controller is open.

I don't have an existing thermostat.


Then add one that is wired in series with the programmer.

Just like we use to do before all this smart control happened.

ie the ****e that costs a fortune to buy and never works.



--
Adam