Piotr, I couldn't find any short help guide for you to print, but I have found out that you can add a help add-on to your software (available here http://usa.autodesk.com/adsk/servlet/ps/dl/item?siteID=123112&id=21208244&linkID=18154757) as well as some API documentation. You can also find a lot of tutorial to help you learn how to use Autodesk CFD (here: http://wikihelp.autodesk.com/Simulation_CFD/enu/2014/Help/0083-Tutorial83)
I hope it will help you and good luck with your simulation model!