Originally Posted by jfarrar
27 foot 2012 flying cloud; I want to add a second air conditioner.
Considering that I don't think you are pre-wired for a second unit, it will be a chore to get that additional 20 amp 120VAC circuit up to the fan location that you plan to use for your second A/C unit. You would probably need to remove part of the ceiling to be able to run the cable, and be certain that the location is re-inforced for the weight of the A/C unit.
And after you convert your breaker box, power inlet(s) and transfer switch (if you have one) to 50 amps, if you intend to use your existing zone control thermostat, you will also need to run a phone-type data cable from the first unit to the second, which will be a chore unless you do it when you remove some of your roof panels.
Setting 2 units for single t/stat operation will be the simplest part!!!