This printer according to IBM Documentation will not print from the Iseries and does not support LPR, Lan Printing or Client Access PDT due to it has Host-Based Printing.
The Y below means host based all the N and n/a means no printing capabilities.
HP Officejet Pro 8500A e-All-in-One Series – A910
HP Officejet Pro 8500A e-All-in-One
HP Officejet Pro 8500A Plus e-All-in-One HP PCL3 GUI Y n/a n/a N N N N
On e thing you can try is hook printer into say a HP JetDirect or other Print Server and it may then support LPR (Remote Writer on Iseries).