...The caveat is that elec pumps are supposed to run only for short periods of time and could overheat otherwise. ...
Who told you this ...äääh... "fact"
Same pump is installed on the A320Fam at B & Y.
On the blue position they run the hole flight.
(*whole)
Same pump, yes, but I think I am right in saying that when installed in the 'Blue' position on the A320/321, there is more air ducting for increased cooling, thereby allowing continuous running?