A few days ago, I had a Carrier Infinity system installed, with a 38TDB condensing unit. This unit was delivered to my house in its cardboard carton, but the bottom of the carton had already been removed. When the unit was put on a hand-truck and moved to the back of the house, I noticed that the unit had apparently been slid across the shop floor and the paint on the bottom of the condensing unit's pan had been scratched off as a result. As I mentioned in an earlier post, the unit was then bolted straight to a concrete slab, without isolation pads. Now, in hind-sight, I'm very worried that the pan is going to rust through. Do you think I have a valid concern here, and if so, what could be done to correct this? Thanks much.