Product review (5 stars): See how to connect it.
Only need  a diagram, because it's a  retrofit is slightly different from original. connect the red cable from the 24v of transforer on the side next to the blue to A. The blue jumper goes to B and 4,  the White goes to 6, and the green to T. On top, on te relay the outher connector the red (fat one) comiming from the vent ((NO) noraly open) and the red 220v from transformer to the center (Com). Works great!!