These boxes can be pretty upsetting to cats (but great for the cat owners!) because of the mechanical noise and motion. So, you want to turn it off while he gets used to it. During the first couple of weeks, go ahead and scoop it like you normally would. Then you can start to turn it on and see if he will adjust. Most will, once they realize that the new box is not out to get them.
Let me know if you need more help!