I would say follow the instructions for the condensor to the T.
As for electrical...
You must have the right voltage for electrical. After long runs, the voltage drops so if you are over, say, 75 feet, I would go up a size in wire to account for the voltage drop. Do it right. If you do not know what you are doing, call your electrician friend (I know everyone has one). (S)he'll be able to tell you what to do. The connections at the condensor itself is most important but the right size breaker and connections (not overtightened) int he panel are crucial as well. The wire run must not have any nicks or cracks in the outer jacket. If there is, don't just say, "oh well," and move on. Put a junction box and splice it correctly. Remember when you are making your final connections and if you are using insulated wire nuts, they should be there just to insultate. Never twist the wires together with the wire nut. Use plyers. It's best to do it right before the fire starts due to improper wiring.
If you need any online help with this, let me know.