Apologies - there WAS an answer below the sponsership adverts. However I still didn't see a diagram for the EP2002 there, so I guess my question still stands - did you find a diagram somewhere?
noplumber, January 2009
HI - wierdly I need the same thing and am struggling to find one. No one seems to have responded to your question, but have you managed to find one elsewhere?
noplumber, January 2009
Wiring diagrams
http://www.gasman.fsbusiness.co.uk/wiring.htm
Look at the back of the programmer for further wiring connections