With the PDF open in Acrobat, ctrl-D>initial view and select page 1.
I tried that, and it unfortunately does not work.
Thanks for your reply.
Yes it will work, but only if you have turned off the preference to remember your position:
Edit > Preferences > Documents > Restore last view settings when reopening documents
Yes, actually you can do that.
Just embed this piece of code in the document (not inside a function):
this.pageNum = 0;