Hi all - I'm looking to replace a Honeywell ST9400C with a 2-zone Drayton Wiser. The Honeywell controls the heating and hot water and has the following wiring:
I thought I could simply remove the Honeywell and replace it with the Wiser unit without changing the wiring but clearly not as the hot water timer switched the boiler on but put it to the heating rather than the hot water tank.
I've looked at other posts but they seem different to my problem as they talk about external thermostats etc. Can anyone please give some guidance on how to go about this please?
Many thanks
I thought I could simply remove the Honeywell and replace it with the Wiser unit without changing the wiring but clearly not as the hot water timer switched the boiler on but put it to the heating rather than the hot water tank.
I've looked at other posts but they seem different to my problem as they talk about external thermostats etc. Can anyone please give some guidance on how to go about this please?
Many thanks