Install the scanner driver by following the instructions in the Orgaweb.
Walk to the scanner in room 022 and set it up for scanning: Options→Online.
Now you can scan into TWAIN compatible programs, e.g. Adobe Acrobat or GIMP.
Set the printer back to Options→Offline when you are done with scanning.
Using the built-in send function of the scanner
Open the send view in the menu
Select E-Mail and then E-Mail Address from the appeared dialog (the big green button changes its status from idle (green backlight) to ready (red backlight))
Specify your E-Mail address in the textfeld and confirm twice with OK
Put your documents face-up into the scan-unit at the top of the scanner and push the green button (your documents will be scanned immediately and send as a pdf document to the specified E-Mail address)