Department code creates a sub-account for the code.  If you want to show the dept. code separately in your balance sheet you need to check the "Print Department Detail?" box after you select the periods you want to show.  If this is left unchecked, the values in the dept. code (or sub-account) get added, so the value showing for your GL code 22052 and 22052-100 will be accumulated.
 
It's handy if you have different departments (obviously), or lines of business where you might want to separate out an income statement, for example.