Strange they would market that as an industrial welder.
From what I see it's more of an entry level, home shop AC stick welder. Far from an industrial welder!
Just doing some quick searching, appears the company is long gone.
Finding an owners manual will be a matter of finding someone that will sell/give or share a copy. I wouldn't expect to gain a lot of specific information from it. It will have directions for use, but that's basic stick welder knowledge.
Apparently it is wired for 230 volt, otherwise it would only do very light welding without tripping a breaker.
Not much chance of finding parts if they are out of business, but typically anything beyond leads, a power switch, or cord set, would not be cost effective to replace. Those items are readily available at a welding supply or can be adapted to work from something else.
I did find this, maybe you can track this man down if he's still around.