Can i install condenser unit of split air conditioner in a rotated position?
Probably not. The problem is there is a compressor in there and that uses gravity to keep the oil in the compressor. Have you ever heard that you need to let a refrigerator stand upright after moving it if it was laid on its side or back. This is to allow the oil time to drain back to the compressor. And usually takes 4 hours to 24 hours.
 If the unit is placed on its side it it will fail in a very short period of time, I do not know of any models that can allow to be run other than 1 position.