This FAQ article shows how to convert the NOVA Voyager Drill Press to 220V input.
The internal circuits of the NOVA Voyager is able to take in both 110V and 220V without any adjustments. To accommodate the increased voltage the power plug has to be changed to a 15A rated model.
The typical 15A power plug would be a "NEMA 6-15P" which can be picked up at your local hardware store.
*We do not supply the replacement plug*