Hi everyone. May I add a few thoughts to this thread?
First, this is a website dedicated to information exchanges between industry professionals and is not intended for DIYers. The forum rules actually forbid DIY advice.
Second, you are putting the lives of your family at risk by attempting this install yourself. The instructions recommend a qualified gas professional to install these units, which I doubt you guys are. No offense intended, just facts.
Please do yourself and your loved ones a favor......take this product back for a refund and put that money towards a quality gas fireplace that is installed by someone that does this for a living.