I attached a CIS/CFS system around February, 2013 to my Epson WF845. After the ink level dropped to slightly less than a third, I refilled all the inks in the tanks to full. That was in January, 2015. Needless to say I'm not a big time printer, just my office documents, my kids school...
I have searched the internet and have not been able to find link to get a copy of the service manual for Epson Workforce 845.
I'd appreciate if a link is posted for it. Thanks!