I don't see a switch for the vibe pump, so I would guess by the description that it is activated by opening the path with the lever. The vibe would have to be providing very low pressure if it is only doing preinfusion (and moving the water from tank through HX) duties. I wonder if that is regulated by an opv or some other setup since vibe pumps aren't terribly adjustable on their own. The rough description also implies a direct plumbing option which should allow for line pressure rather than vibe, but it appears that is not done here.
The electric heating on the group is logical, but again, seems to have no user accessible controls.
Why must they torture with vague descriptions? Obviously this is aimed at the home market with that size boiler and the N. America market with a 110v option, but then so is the Mitica which this is based on, and I don't see it advertised anywhere.