Hi bdroe1 and Welcome to the Forum!
Most RV Owners Manuals are very generic and not much help.
You should be looking for your specific chassis manual, Ford or Chevy. If you tell us which you have we can help.
The individual components and systems like the furnace, fridge and stove all have their own manuals and can usually be found online. Find the Make and Model # tag on each item and you should be able to find your manuals.
This link should get you started.
Service Documents and Manuals
Best of luck!