Dude, don't worry about "which line is which". Two different size fittings, they'll ONLY fit where they're supposed to. Follow the directions on the recharge kit, and you'll be fine.
YES, it's 134a, but the only thing I want to caution you on is this. That is a SEALED system. Now it needs a recharge? Freon does not "just go away". You have a leak somewhere, and you need to find it, and fix it, before you recharge the system. If not, you might as well just send the money you spent on that recharge kit over here to Ohio.
With me? The stuff just doesn't "go bad". It went SOMEWHERE. Find out where first, before you waste your time and hard earned cheddar.
