I don't think we'll ever find a statement in any Dometic manual that says, "If you're reading this on the Keystone Forum....." That said, the Dometic owner's manual addresses operating the refrigerator while underway. It does not say "you can safely use propane" nor does it say, "You must not use propane" but it does say that the rocking and motion of the coach will eliminate the need to maintain the vehicle level while operating the refrigerator when towing. That "should" provide the ability to understand the process (although it's not addressed in specific words"....
Anyway, this is what's in the Dometic 2652/2852 Owner's Manual:
"Any time the vehicle is parked for several hours with the refrigerator operating, the vehicle should be leveled to prevent this loss of cooling. The vehicle needs to be leveled only so it is comfortable to live in (no noticeable sloping of floor or walls). When the vehicle is moving, the leveling is not critical, as the rolling and pitching movement of the vehicle will pass to either side of level, keeping the liquid ammonia from accumulating in the evaporator tubing."
So, common sense would indicate that if the rocking while towing is sufficient to distribute the gasses, then it must be OK to operate the refrigerator while in motion which means that it also must be OK to operate the propane system when in motion because that's the only way to operate the refrigerator.... (vicious circle ???)
And, if there's someone who wants to rebut this with, "But that could mean operating it on 12 VDC"... Remember, the 2652/2852 are both two-way refrigerator systems and require either 120VAC or LPG to operate...
