Can anyone help?
I am replacing an old EP2002 with a new Drayton LP522, on a gravity fed, pumped HW system. The potterton back plate has the following wiring connections.
A,B,C,D N L 1,2,3,4,5,
I Have connections to D = B,BR L,N, 3,4,5.
What do I connect the Existing D...