Epson Aculaser c9100 - Duplex Unit; Installing the Duplex Unit

198 Installing Options
Duplex Unit
For the paper types and sizes that you can use with the Duplex
Unit, see “Paper Sources” on page 31 or “Printing on Special
Media” on page 45. For specifications, see “Duplex Unit” on page
333.
Installing the Duplex Unit
Follow the steps below to install the optional Duplex Unit.
1. Turn the printer off and unplug the power cord.