zmotorsports

I would recommend running the diesel burner occasionally to keep the fuel fresh in the system as well as nozzle clean.  Yes, you can remove them and clean them, but letting it run for a few minutes every so often is so much easier.  Also, the diesel burner IS the primary heat source for the Aqua-Hot, electrical is the secondary.
When we arrive at a campground, after checking in and getting to our site I turn the diesel burner on to let it run through a cycle, and then turn the electric element on.  I keep both switches on throughout our trip(s) and seldom does the diesel burner come on during the warmer months unless the wife and I shower back to back with no recovery time for the boiler tank.  In the spring and fall trips when running the heat registers the diesel burner will come on in the AM when I bump the T-stat up a bit but I still keep both the diesel and electric switches on whenever we use the coach on vacation.