I have bought a Nest Thermostat hoping that I can make my "TemperZone" branded HVAC a smart one. After nemerous amount of failures and 2 weeks of reasearch I am looking for some forum help. The Ozbargain way ;)
I have 4 ports in my current system:
Port B with Yellow wire and Port A with Green. They go to RS-485 Comms.
Port GND has black wire and Port 12v+ has Red wire and they got to Power Supply.
In my Nest, I don't have ports that specifically mentiones the posrts as above but it has the W, R, B, R, G, Y ports.
I have tried re-porting from Temperzone to Nest Thermostat but expect Power, nothing else gets picked up when I setup the thermostat via the Google Home app.
I have been through many forums and reda articles and people's experiences.
Do you have any luck or do you know any electrician who can help with setting this up?
So far I found one Canberra based company who has installation experience but unfortunately they don't provide service in central coast.
Any help guys?