Try the Dometic website (
www.dometic.com). Look for the model number of your A/C and thermostat. Once found, there should be a downloadable manual available online for both items. If not, check out these Dometic phone numbers:
1-800-544-4881 the Service Center Assistance
in Canada 519-720-9578
To operate your A/C via a generator, you are probably looking at 3000w or better. A few folks have had success running an A/C with a 2000w, but you would be far better off with something in the neighbourhood of 3000-3500w.