We're moving our equipment into a new facility. We're not sure about whether the phases are correct coming into the machine. Based on fan rotation, I'm fairly certain that we have it correct. The main impeller-style fan on the back is turning counterclockwise when you remove the back cover. This would mean that the air is entering the fan from the round duct that goes into the inside of the controller cabinet and is then blown out. I'm arguing with someone who is telling me that the Germans do it differently and that the fan should turn clockwise, pulling the air from the outer edge of the fan and in through the round duct and into the cabinet. I've never seen any fan of this style turn in that orientation. I've never seen any pump or any fluid moving device move fluid (air or water) from the outer rotating edge into the center. But I've been wrong before.
Can anyone show KUKA documentation (because we're both going to stand our ground until we see it written down somewhere) that supports one way or the other?
And absent that, can someone point to some KUKA documentation that would state definitively how to verify correct phase order?
Thanks