I have the smaller version of that, the 135. I will have a look for the instructions over the weekend to see if they cover yours.
I haven't used it for ages, I was going to sell it, but thought I might as well keep it for what I get for it, might be handy one day for the gasless.
The amp range is not very good, the minimum is not that low, which used to make it hard on 0.8 steel (on the 135 any way), but it will tell you on the info plate on the front what the amps are.