Thank you Wlodko,
Basically it depends on regulations in your area and on your knowledge about this subject. Let's say you decide on doing it on your own and some driving by local building inspector notices and decided to ask questions. If this particular task requires a permit and licensed contractor to perform the job (even if you know what and how to do it), there might be consequences.
If you decide doing it by yourself anyway, make sure to follow all the local building codes, manufacturer's requirements, and take all safety precautions during installation - it's your life!