Mike, first I would have Bobby and Scott at Kustom Koach Works do it for you, and second I would never re-install a RV type refer. Why, RV refers are the reason 60% of all RV's catch on fire, second, they are not efficient at all, so find out from those guys how much it would cost to install a residential type in your coach, you and the little lady will love the space, and how nice and cold the food keeps. All new ones come with ice/water in door, have him plumb in the water supply with a valve, and leave the valve off, and the ice/water feature turned off on the unit. Mine is in our coach, and we have never had an issue with it that way. Hope this helps, and my signature below tells you why I feel this way on this issue. The costs is about the same since RV ones are very expensive.
Monty & Janet - 2007 Alpine APEX 40 MDTS
S/N - 75715 - Retired - Master Certified RV Tech