For 3 wire installs, the yellow wire and either brown or purple wire are just connected to each other, but not to anything in your system.To figure out if you need counter-clockwise or clockwise rotation, look at the motor from the back with the blades hanging below (not sitting on the ground with the blades sticking out above). If you were looking at it sitting on it's back on the ground with the fan blades above, you'll probably have picked the opposite of what you needed.As mentioned before, once you've figured out which direction it should spin, for 3 wire installs, the other wire just gets tied together with yellow and doesn't go to anything. In my install I've tied together yellow and brown, which was also the least brown color of brown that I've seen lately.
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