Hi so on a different thread I went through the steps to remove the maze and add a wiring center as follows Honeywell Cyl Stat - C,1,2 to Wiring centre C,1,2 Correct Honeywell Thermostat - E, 1,2,3,4 - to wiring centre - E1,2,3 (no 4 in the centre) to just use the 3 Correct; Terminal 4 is used for cooling applications Mid Pos Valvel - Grey, Blue, Orange, White to the same on the wiring centre (wiring center has a brown but Valve does not) Boiler just has E, N, L wires (as in the 3 of them) so in wiring center assume I just use L N and E Correct Live feed is obvious So it is L, N, HW On, Hw Off, CH On - to its counterparts in the wiring centre And so is this I use the Y plan (mid posn valves) so cut links L4 and L5 Correct and I have read the boiler manual and it does not talk of pump overun anywhere so I guess I ignore that bit Correct So issue is the CH will not come on, the pump is silent and the valve does not operate when I use the room stat So I have bypassed the room stat by linking 1 and 3 in the wiring centre Still no good so its not the stat What tests can I do, can I bypass the programmer to HW and CH is just on all the time ? Help John B
I think its the programme, I have bypassed it and made HW and CH perm live and now the heating is working and the hot water is on - I can control the heating via the room stat, hw been on all the time is not an issue Not sure how the pump, motorised valve all work together but if its working then I guess I dont need to worry about it to much John B
new programmer, bypassed both and provided a perm live to both HW and CH - now I can control th eCH via the room stat and the Tank Stat controls the HW - just cant time anything till i get a new programmer thanks for your help John B