My confusion is lessening. Dave from Progressive Dynamics emailed two pdfs (one titled "4045ka connections" and the other titled "4045 switch usage") to me with jpeg photos of the PD4045 with installation notes. I will post them if I can figure out how to do so. After looking at them I called him again today with more questions.
From what Dave verbally told me today (6/5/2014) it seems that Zach is substantially correct that a 15 amp converter breaker is needed in the USA per RIVA standards, in addition to a 30 amp main breaker. I won't mention other alternatives we discussed that may not meet RIVA codes or standards.
In the "4045ka connections" photo I received there is a twin breaker on the left with a 30 amp switch and a 15 amp switch. The 30 amp (main) side gets wired to the incoming AC power. The 15 amp side of the breaker gets wired as a converter breaker according to what Dave verbally told me, similar to Zach's drawing...except that (in the photo) its done with a twin breaker, instead of two single breakers like shown in Zach's drawing. A black (wire that you need to supply) wire needs to be connected from the converter breaker to the factory installed black wire already screwed into the short buss bar on the far right of the PD4045. Or, it would seem, you could unscrew the black wire that is factory installed to the far right buss bar and attach it (the factory installed black wire) instead directly to the 15 amp controller breaker.
I want (at least) three AC circuits. One circuit for the cabin outlets. A second circuit for upper galley outlet(s). A third circuit just to power an AC/DC fridge freezer. Now that I have to return and exchange the AC circuit breakers I bought I may decide to add a fourth circuit for an exterior AC outlet.
I bought all single breakers. I bought one 30 amp breaker and three 15 amp breakers which fill all four available spots on the AC buss. I want to have three AC branch circuits. So I need to return one or two of the breakers I bought in exchange for different ones. In exchange I need either one twin 30 (main) and 15 (converter breaker) amp breaker OR one twin 15 and 15 amp breaker to fit in the four available positions. There are other possibilities too. I might return all four single breakers and get one twin 30/15 breaker and two twin 15/15 breakers...so I can have four AC circuits.
I suggest you take your PD4045 to your hardware store to get the right breakers. This will be my third trip to the store to get the right ones. The first ones did not fit on the AC buss. Keep your receipts handy if you need to make a return.
Dave said for liability reasons Progressive Dynamics will not provide more complete written instructions of the many ways a PD4045 can be wired. Instead they say to have a licensed electrician or RV technician do the installation. It is frustrating that they do not mention, or show, the (needed in the USA per RIVA standards) converter breaker in their installation instructions.