The source I transcribed this choral prelude from ( Manuscript Mus.ms. 30190 owned by the Staatsbibliothek zu Berlin) has it as a manualiter version. A few months ago Agnus_Dei uploaded a pedaliter version (http://www.contrebombarde.com/concerthall/music/15870). Since I don't have another source I don't know which version is more 'authorative'.