I have about a 20 year old gas boiler and need a manual and or wiring diagram. My plumber and electrician are finding a fault but with three zones and lots of wires they need help. Is it possible to download and manual or diagram.

Annie m., February 2009

get rid of sparks/plumber and try heating engineer boilers don't get any easier than this,even with zoning its only stats and two ports,perm live feed on gray wire to 2port/switch live of stats go to the brown on two port/valve motors across makes micro switch and sends feed down orange wire to boiler/pump.the programmer sends the live feed to the stats

jim, February 2009

The boiler is obsolete,hopefully someone might be able to help.The wiring diagram is usually inside the brown front cover that you take off with the one screw in the middle.

Tony S, February 2009