How do I go from 4 prong to a 3 prong?
Answer Hello Ron. Remove the 4 prong from the unit and then take the two outside wires and place on the two outside screws and place the center wire on the center screw on the terminal block.
How do I go from 3 prong to 4prong cord?
Answer Hello Danny. Remove the 3 prong and hook the black and red wires of the 4 prong to the two outside screws on the terminal block. Then install the white wire in the center and the green wire goes to the green ground screw on the unit.