Hi cliff,
Did you have any luck with this? Were you able to set up the Ideal heat boiler to allow two temperatures, one for CH via OpenTherm and one for DHW without?
Hi Cleph, is there any chance you could describe the relay setup you have to get OT working on an ideal system boiler. I'd be looking to use it on an S-plan which I think I theoretically can... Nest calls for heat and modulates properly with OT, but when it calls for water it doesn't adjust the...