no RV has an electric furnace, they use propane to heat. but it does use 12v DC battery power to run the fan and the electronics.
make sure you've cleared the air out of the propane lines by lighting the stove first. and turn the propane tank on SLOWLY.
as was said, you should be able to download the manuals for many of the things you have in the popup. like the 3-way fridge, converter, a/c(if you have it), lift system and so on.
the owner's manual would be pretty useless anyway, since it is generic and has nothing specific to your model.
and Zoe the Wonder Dog(R.I.P.)
'07 Roo 23SS pushing an '07 Chevy Avalanche
Equalizer WDH and Prodigy BC