You have a package of paperwork that includes all the installed components that make up your unit. In that stack/package, however you recieved it, you will find owners manuals for your furnace and your hot water heater.....Relax, find the books and read them.
No man has a good enough memory to be a successful liar. Abraham Lincoln
2016 36FBTS Pinnacle
2016 F350, 6.7, 4x4, DRW, long bed
B & W Companion 5th wheel Hitch