Pumps can be close coupled (kortkopplade). I doubt that the fan speed will increase if you short circuit the fan. I don't want to try it:)
"Modell LSB är en horisontell blockpump med pumpsteg enligt ISO 2858 / EN 22858 (formmodell LSN) och kortkopplad TEFC-motor enligt IEC typ B 5."
http://www.xylemwatersolutions.com/scs/sweden/sv-se/produkte..."The model LSB is a horizontal block pump based on hydraulics
according to ISO 2858 / EN 22858 (form model LSN) with
close coupled TEFC motors according to IEC desig B 5."
http://www.flygt.de/1260302.pdf