I've just moved into a new (to us) house which has a Vitodens 111-W installed along with a Nest V3. The Nest is configured as On/Off (not OpenTherm).

I believe I may benefit from switching to OpenTherm config. How would this be best achieved? I suspect the boiler is not configured for OpenTherm. Is there anything else that I need to consider prior to making any changes?

The long (short) term plan is to swap out the Nest for tado and install the tado TRVs. I have the tado kit already to go, but just don't have the time having only just moved in.