Noob Questions: Need Help!

[Robert Gonzalez]

So I am renting out my primary residence (PA) and I live in an apartment in another area (NYC). 

First question: Do I need to do anything with my current mortgage or can I keep it as the current primary residence loan?

The second question is this: Can I refinance that mortgage to a lower rate with a primary residence loan since it is rented out and I don't live in it?

Thanks!