after using the search function on this forum for: HFS-6 manual nothing pulled up, but the first thing on google under the same search netted the manual. The topic of the thread was HFS-6 manual, go figure.
http://www.aquamist.co.uk/vbulletin/...ead.php?t=1535
install guide
http://www.aquamist.co.uk/HFS6/HFS-6-3w.pdf