This is because I'm using Sf 2.3. In new commit I make in work both in all 2.x versions. 
I need to work with this field as a text field because it has the same logic. Without this I can't get value of this field by $form->handleRequest($request); This is correct for 2.3 version, I don't know about 2.0. 
Other way is to implement logic of Type to get data in handleRequest process, but I dot know how.