Our unit has ducted AC. It came wired for a second AC in the bedroom. We have a fantastic fan instead of a second Ac unit ion the bedroom. If we camped in the south more in the summer we would probably install a second AV unit in the bedroom.
In the bedroom is a temperature sensor that can be used by the thermostat. The thermostat has dual zone control - one for the main living area one for the bedroom area. So - I am assuming that the bedroom Ac could be set for one temperature and the living room set for another.
Someone that has a similar thermostat and two Ac units may be able to verify the operation of the controls.
Thermostat:
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Bedroom temperature sensor:
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Found this in the manual:
Zone Control Zones are established at the time of the installation of your Dometic CCC 2 thermostat. A zone is an area of cooling/heating which is controlled independently by the CCC 2 thermostat. The CCC 2 thermostat allows for four zones (Air Conditioner/ Heat Pump) to be set up and run independent of each other. If you have one air conditioner/ heat pump installed, you will have one zone. If your RV has more than one cooling/heating system, you may have 2, 3, or 4 zones.