Google Nest Community

I have a duel zone system. I already have a nest on the subordinate zone. I am trying to replace an older Lux 1500 with the Nest on the main zone - it does not recognize it. The system is a force air Oil with AC. Wires connected on the Lux are G Y W ...

i have a duel zone system. the satellite system already on a Nest device. The main system is using a Lux thermostate and has 6 wires. See photo. If I enter all the wires it says it is not compateble, but as i reduce the one of the wires it says it is...