If you have a system for testing and training then you certainly have production systems as well. Use the serial number from one of them to setup a NOW account where you will find all the documentation that you need. It isn't entirely relevant that you can do all of this on an E(xtra)M(oney)C(harged) Celeron, because a NetApp is an entirely different beast.
Other than this, there is probably no official/legal way to give you access to documentation. If someone had the foresight to order the paper/printed documentation with the system originally, then you have something to work with there.