Nest w/4 Pipe Fan Coil System - Replacing PSG Thermostat

[simon334]

Hello - Can I use a nest in place of a PSG thermostat on a fan coil 4 pipe system. Attached is a photo of the current wiring. Thanks!

[simon334]

@CoolingWizard saw you posted about this before. Would appreciate your help!!!

[CoolingWizard]

@simon334 , what help do you need from me? 

AC Cooling Wizard