Google Nest Community

I (or rather my HVAC techs) just installed a new zoning controller (Ecojay Smartzone 4X) with two new Nest thermostats (the base model) upstairs and downstairs, and everything went fine. Except that neither thermostat sees either the W, Y or G wires....

Google specifies that the base Nest Thermostat can control either 2 single stage units (furnaces or ac compressors), or a single stage and a 2 stage unit (either furnace or AC), but not 2 2 stage units. The upgraded Learning thermostat can do three a...