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- Sun Jan 29, 2023 12:02 am
- Forum: OpenTherm Setup & Help
- Topic: Simple conversion from Y plan to Opentherm
- Replies: 4
- Views: 524
Re: Simple conversion from Y plan to Opentherm
Having just done this exact conversion today, it is way simpler than I thought. I had a Vaillant boiler which needed the VR33, slotted it into the boiler, plugged into X32 port - my VR33 had X32 and X31 terminals that I could connect to, it came out the box wired to X32, and there was a ...