If you go to the Cheap Heat website you will read that they don't recommend you install it your self but they go to a Cheap Heat dealer.
Now you are probably thinking right so they can charge installation fee and you may be right. I for one even though I am mechanically inclined would not attempt it due to propane line that has to be disconnected and reconnected.
My advice to you would be to find a Cheap Heat dealer and it installed correctly.
2014 Winnebago Adventurer 35P,Ford F-53, V-10
2011 Ford Escape,2000 Roadmaster Tow Dolly
"Have a Great Day, Enjoy RVing."