Does it mean the power supply can supply 4000W/240V =16,6A ?
No, it takes 16.6A from the wall, at 240V. It drops that down to a thousand amps or so at 4V (and lower voltages / currents).
4" wide thermode capacity
What does it mean? Thickness of thermode?
That's the width of the connector you're heating. Thermodes are available in a lot of widths. You normally want th width to be only a little wider than the connector, as there's usually stuff next to the connection that you don't want to compress or heat.
The thermodes are also as thin as possible - for instance, a 17F1000 is 1.000" wide, and .075" thick.
However, they can't be too thin, since there's a lot of mechanical force, and current, and heat going on.
180A/EZ air operated head.
What does it mean?
That just means it uses a compressed air cylinder to press the thermode against the connector. Once the pressure is right, the machine applies a current, controlled to meet the required temperature profile.
A typical soldering profile would be
Time Temp
0s Ambient
1s 150oC preheat
3s 300oC reflow
5s 180oC cooling
A typical Z-tape profile would be cooler, and very tape and substrate specific.
PIX2 PIX3 240 volt input
What does PIX2 PIX3 mean?
Not a clue!
A search for
Uniflow 2 Technical Manual.pdf
and
thermode selection guide
should give you some useful stuff.