Hi,
It is my first dive into the world of programmable thermostats and before buying a HestiaPi, I’d like to make sure it can replace a RAMSES 722 S. Given that the latter is a basic thermostat (hot water is on demand and there is no cooling), I’m thinking of getting the HestiaPi Touch.
Thanks for any help,
Christophe
Hello Christophe and welcome to the club 
I looked at your link and the schematic. As long as you use only the contacts 2,3,4 and 5 in your wiring you are good to go. Please check the inside of your thermostat or simply send us a photo.