Facility printer setup is now documented in Installing Citizen Label Printer, under Network-Card Printer Setup → Add the Printer to the Facility (Printers Tab). That section covers adding a printer (Printer Name, Printer IP and Port), editing or removing a printer, and choosing which printer a job prints to.

Note: the Facility Printers tab is only needed for printers with a network card. USB printers do not require a facility entry.