Epson WF-6590 User Manual page 209

User's Guide
2. Disconnect any connected cables.
Note:
If other optional paper cassette units have been installed, uninstall them as well.
3. Remove the optional paper cassette unit from its box, and then remove any protective materials.
4. Check the items supplied.
5. Place the optional paper cassette unit where you want to set up the printer.
Appendix
209