Hi . you may have to check the boiler. I think the vailants have a wiring junction for low voltage and high . make sure the 240 room stat is not wired
I had already worked that out for myself-I just didn't want to poke about in the boiler electronics.
However I have just done that, and can confirm that the existing stat appears to be wired to a white terminal block labelled RT 24, which is described as the 24 v DC room thermostat in the installation instruction booklet. The only other wiring is for the main supply. Presumably I could also put a timer control between the FCU and the boiler?
Yes , sure you can put a timer in between , no probs .so yes you can simply wire in the wires into bthe new thermostat
Hi . could you please rate your answer , thanks