Not familiar with your camper either. However:
When you look at the plumbing on the water heater, are there 3 valves?
One on hot; one on cold; and one between the two hoses?
If not the bypass kit is not installed. Contact your dealer to have one installed if you think it might be more than you can handle as a mod.
Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW