Bench testing BN2

Can anybody provide clear specific steps - 'connect the dots!' - for bench testing a Eberspacher BN2 gas heater?

I've purchased one that appears complete and in decent shape that Doug Allen in Maine is going to coach me on how to safely install so I don't wind up frying myself...and I want a viable working one to take to him in Maine.

Thanks

i have rebuilt a B2 and BN2 - they are very similar, so aside from the fuel pump type and lack of a fuel check valve on the B2 (ask me how i know) - they are the same design.

here is a wicked thread for a B2:
http://www.thesamba.com/vw/forum/viewtopic.php?t=302837&highlight=gas+heater

another good one:
http://www.thesamba.com/vw/forum/viewtopic.php?t=314546&highlight=gas+heater

and the manual:
http://www.thesamba.com/vw/archives/manuals/heater_ac.php

the manual is very good and has a great troubleshooting tree.