The manual will be on the Miller site -- OTTOMH you have to enter the model number (or maybe serial number) to get the manual for "obsolete" machines. Think I saw that one on eBay!
Errmmm......check out the data plate on the back, full-whack on mine wants 107A if I run it on 230V, yours will be somewhere around the same .
It's also single phase, not 3PH as advertised .
Yes but I'll bet not all 5 pins are in use. They're often advertised as 3ph because the sellers have been using them on a 415v supply. In actual fact they use 2 phases of the 3 or if on a 230v supply, live and neutral as normal.
There are jumpers inside the machine to set the input voltage. Mine is fitted with a 63A 3 pin (giant caravan type ) blue plug.
I'm certain yours will be the same setup as mine but I may be wrong. The manual will tell you if it's single or three phase.
Post the serial number of yours so I can have a look on the miller site .