I searched and was unable to find what I was looking for.

I recently was fiven a millermatic 200 from my Dad.

I have my garage wired for 220v. Previous to my having this welder my dad used it at his shop which is 480v. He recalls that he had to change the wiring around to run the 480v but does not recall how to return it to 220v (got the weldering in early 90's). I quickly skimmed through the owners manual and was not able to find anything in regards to this.

I also pulled the cover and do not see anything obvious that I would need to change around, no label for high or low voltage etc.

I believe it is possible he is confusing this with his TIG?

Can any of you tell me what I would need to do if anything?