Mr Cool units they sell on Ebay etc are single phase. I don't think they even make a 3 phase. These are sold to be installed by the homeowner but I agree with the other poster, the charging and the wiring should be done by a professional. If it leaks, you will be calling one anyway and the warranty may need to be registered by a licensed HVAC contractor. It is required to get a permit in most places and your local government may or may not allow you to do the work yourself. As to your question 208 and 230 are interchangeable as far as wiring methods go if this is single phase. 208 is the line to line voltage from two legs of a 3 phase supply but you usually only see that in apartments. I am guessing this is a single family home.
