You should install latest version September 2017. Please follow step by step the installation instructions. If you have issues please post here more details and also the logs. Refer to https://help.qlik.com/en-US/nprinting/September2017/Content/DeployingQVNprinting/Qlik-NPrinting-installation.htm
Note that performances depends on a lot of different variables like the amount of hardware resources and the number of Engines. More details are here https://help.qlik.com/en-US/nprinting/September2017/Content/DeployingQVNprinting/Performance.htm
When applicable please mark the appropriate replies as CORRECT. This will help community members and Qlik Employees know which discussions have already been addressed and have a possible known solution. Please mark threads as HELPFUL if the provided solution is helpful to the problem, but does not necessarily solve the indicated problem. You can mark multiple threads as HELPFUL if you feel additional info is useful to others.
First of all read all requirements (this also relates to QlikView version which in your case is also unsupported), Everything is listed in help document available online (example links below):
Second thing is to make sure you have properly build QlikView application to run with NPrinting - you can read my comments regarding this here (I think this i a big step towards good NPrinting performance): https://community.qlik.com/thread/260840?q=qvw%20size
Third thing is to build optimized QlikVIew app expressions, datamodel - but this comes with experience and depends on many different factors - so you will not get a detailed answer unless you populate your app here.