Seeking documentation on Heller 988 reflow oven.

[Merlysys]

I am looking to buy this 988HAC because of the low price. I know it is 3 phase. Can't find any documentation like user or service manual.

I read that there were several models of the 988, if anyone know of the models and their differences, pls detail here.

It says 208V, since it needs 3 phase does the 208 indicate wiring configuration? (wye/delta)

This model heats by forced air or radiation?