The issue i have is that for some reason when the heating is on the hot water appears to be on as well... should it be ?
If i press the Hot Water Button +1hr it comes on ok
If i press the central heating button +1hr the hot water comes on as well as heating and i cant switch off hot water option
So i thought i would replace the unit with an FP715Si
I used the wiring diagram in the booklet with the new programmer but i now find again if i press the Heating button the Hot water light comes on as well.
In addition it looked like on the old honeywell the HTG ON was connected to the N terminal
If i remove this from the N terminal which obviously also has the N cable it doesnt work at all
Now i don't know if its because this unit cant do hotwater without heating or if its just wired up wrong by previous owners ?
Can the Glo Worm boiler do this ?
Also should there not be a cable on number 2 of the new unit ? - HTG OFF ?
And would this be a pumped system or gravity system as there is a dip switch to change on the new programmer.. not sure what difference it will make.
Picture of wiring.. Note Yellow was on connection 7 on old unit but not shown in pic