There probably never was a specific manual for any particular model of RV. What you do want to find is the manuals for your particular furnace, fridge, charger, water heater, etc.
Retired electronics engineer. Avid paddler & birder.
2011 Silverado 2500HD, diesel, 4x4,crew cab, 8' bed
Palomino Puma 253FBS (27' 5er) & '94 19' Class B