Recent content by meloni

Thanks ericmark. Will look into EPH and Drayton Wiser systems. According to Google, Nest thermostats are compatible with zoned systems: https://support.google.com/googlenest/answer/9250906?hl=en-GB In the meantime I have ordered myself two (one for each valve) 230VAC relays - 2 pole, 2x N/O...

Just sharing my thoughts and I'm not convinced it will work with Opentherm. Any particular solution? Any ideas on how to make Nest work on Opentherm with Honeywell V4043H1056 (N/C) valve controlling central heating zone?

T1 & T2 won't be used as the Nest 3rd gen is powered from separate power supply and connects to Heat Link wirelessly. OT1 & OT2 on Heat Link will be connected to OT input (terminal 1 & 2 X13) on the boiler PCB. Edit: Yes, zone 1 Heat Link should be connected to zone 1 motorised valve to open...

You're right and I realise your diagram doesn't use OT. I am just hoping it can be slightly modified to allow motorised valve to open when there is heat demand from Nest. Not sure whether Heat link connected to OT input would trigger the boiler to fire up or it has to be the valve sending...

Hello, I spent some time reading threads on forums to figure out how my heating system should be wired. I need guidance from those more knowledgable than I. My current set up consist Intergas Xtreme 36 boiler with two Opentherm inputs. Nest 3rd gen connected to one Opentherm input to control...