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I have an Ecotec 618 boiler. I am working to get a Nest thermostat modulating the boiler via Opentherm (easier said than done!)
I have connected via VR33 Opentherm bridge which seems to be communicating ok (no error on nest and D.90 reading 1 on boiler).
Problem I have is that there doesn’t appear to be any modulation of the boiler flow Setpoint and also the DHW won’t work now!
From reading around the subject I believe that I may need to install a VR65 as well for the boiler to “see” the dhw tank via ebus.
VR65 seems to be discontinued and is replaced by a VR66.
Does anyone know if this is interchangeable or have any other tips that may help me on the journey!?
I think that VR66 just needs to be configured for single zone operation 🤞🏻
thanks in advance….
I have connected via VR33 Opentherm bridge which seems to be communicating ok (no error on nest and D.90 reading 1 on boiler).
Problem I have is that there doesn’t appear to be any modulation of the boiler flow Setpoint and also the DHW won’t work now!
From reading around the subject I believe that I may need to install a VR65 as well for the boiler to “see” the dhw tank via ebus.
VR65 seems to be discontinued and is replaced by a VR66.
Does anyone know if this is interchangeable or have any other tips that may help me on the journey!?
I think that VR66 just needs to be configured for single zone operation 🤞🏻
thanks in advance….