Epson EPL-N7000 - Manual (Page 239)

228 Installing Options
Duplex Unit
The following table summarizes the paper types and sizes that
you can use with the optional Duplex Unit.
Installing the Duplex Unit
Follow these steps to install the Duplex Unit:
Note:
If you are installing the optional 4-Bin Mailbox at the same time, install
the 4-Bin Mailbox before installing the Duplex Unit.
1. Turn the printer off and unplug the power cord. Then remove
all interface cables from the interface connectors.
Paper Type Paper Size
Plain paper
(60 to 90 g/m²) A3, A4, A5, B4, B5, F4, B (Ledger)
Letter (LT), Half-Letter (HLT), Legal (LGL),
Executive (EXE),
Government Letter (GLT), Government Legal
(GLG)