I am using the following page as a helper:
 
http://www.tharo.com/documents/tech582.htm
 
On that page the EPC is broken down into the bits that need to be passed to the printer in ZPL.
Based off that I have used the following ZPL and sent it to the printer:
 
^XA
^RB96,8,3,3,20,24,38^FS
^RFW,E^FD48,3,5,0614141,100041,1^FS
^XZ

Unfortunately I do not get the same EPC written to the tag as outlined in the document.
Do you see any issues with the ZPL?
The code I am using to print this:

NSString *zplData = @"XA^RB96,8,3,3,20,24,38^FS^RFW,E^FD48,3,5,0614141,100041,1^FS^XZ";
NSError *error = nil;
success = success && [thePrinterConn write:[zplData dataUsingEncoding:NSUTF8StringEncoding] error:&error];

Thanks