220V/1ph/60Hz equipment to operate on 208V/3ph/60Hz
A line and neutral of a 208-volt distribution system will provide 120 volts. That is only a bit more than half of the needed 220 volts. Any 220-volt load will operate very poorly or not at all. If you can get two 120-volt hot lines from a 208-volt system, you will have 208 volts. That would probably provide reasonably acceptable operation for many 220-volt items and even the more common 230-volt equipment.