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Found a better photo with link in.

Yes main supply to l,n,e. And the link is in between 3 and 4. So just run live to l Netral to n 3 to com 4 to no. Many thanks.

Hi all, Just wondered if anyone can confirm if this photo is the correct method of wiring a rt510rf stat to a vaillant eco tec pro 28 combi. And then remove the link. Many thanks