AS/400 Printing: Installing a Printer on AS/400 
AS/400 Printing: Installing a Printer on AS/400
Process Flow
Spool requests are passed to an output queue, which passes the data on to the connected printer.
This method utilizes the spool request administration functions provided by the AS/400.
For more information about what you have to enter in the R/3 spool administration function, see
AS/400 Printing: R/3 Spool Administration Settings