Instructions

How to wire Shelly1 to your Boiler
It can be used with the following LOW VOLTAGE system protocols for digital control or AC
110-230V VOLTAGE system.
How to wire Shelly1 to your OpenTherm protocol with AddON
If you have an OpenTerm Boiler, you need to use ShellyPlus1 Add-on and enable in settings
OpenTerm control. This feature will be supported from March 2021.