Hi Muggles,
Thank you for your reply.
Am I right saying that A and B I can find in boiler control/board itself therefore need different cable to connect to boiler?
Many thanks for your help.
Hi All,
I have got question on installation Nest Heat link to boiler. I have got Vaillant Ecotec Pro28. I currently have Honeywell thermostat and receiver (wiring) has been shown on picture attached. Should I do exactly the same as on the picture above ie:
N to N
L to L
With yellow/ green cable...