In order to print out your template on an Android device, you will need to go to the Android Settings and enable the Default Print Service.
To open the Android Settings, pull down from the top of the screen and click on the gear icon at the top right of the screen
Select Connected Devices > Printing > Default Print Service
Make sure the Default Print Service is ON and that you can see your network printer in the list.
You should then be able to select the printer from the print dialog / pop-up when you try to print a template from the Order Templates App.