Currently I have Shelly1 wired instead of thermostat for testing purposes and all is well. I am ready to move it inside the (gas) boiler and connect existing thermostat as the external switch. I would like a confirmation or two
This is one single 230V wire going out from the boiler to the simple On/Off thermostat, and returning from it back. When Thermostat closes the loop, the heat is on.
I think I should (all connections are inside the boiler):
1) connect outgoing Thermostat wire (now going out from the boiler to the thermosat) to both the thermostat (as it is now) and add the second wire to that terminal and connect it to the Shelly Input port.
2) move the thermostat return wire from the return port of the bolier to the Sw port of the Shelly
3) Connect Shelly Output port to the Return port of the bolier (where Thermostat return wire was connected previously).
Is this correct?