All guides should have come with the appliance on the CD, if not you can get them here:
The publicly available "information" etc, for appliances is on the Symantec site:
If you are unsure then it is worth engaging your Symantec Partner to help you deploy the appliance(s)
Hope this helps
you can try this link also.
Remote offices - 5220 can be an all-in-one unit Media Master server
Data centers - Media server for FT (LAN free) - VM Backup device - Regular media servers.