Jammer,
With your 2-zone Dometic Comfort Control Center (CCC), you join the majority of motor home owners that use the same set-up. In my experience ( I am a Dometic Team 2000 Service Center) they have proven to be the most reliable and easy to service t/stat and HVAC system in the RV industry today.
They have many more functions than just A/C and heat. Motor Homes use this system for a temperature controlled automatic generator start if the power fails and the temps drop below a user determined set point (think pets in the coach on a hot day) so the roof airs will continue to operate.
Also, the CCC will control up to 4 zones of A/C, heat pump, furnace or Aqua-Hot hydronic heating. The system generally runs from the CCC to the lead A/C unit (generally zone 1) and then has a series connection to the other units by 6 conductor data cable (like phone wire but with different plug orientations). Each roof air has a connection for the corresponding heating zone and source.
I agree that the cheap RJ-11 unions can be a problem, but if they are properly installed with strain relief and cabled to the inner roof joists and do not vibrate or move around, they are usually pretty reliable.
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lewster
Solar Tech Energy Systems, Inc.
Victron Solar Components and Inverters, Zamp Solar Panels, LiFeBlue and Battle Born Lithium Batteries, Lifeline AGM Batteries
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