In my experience, I have seen many home owners buy as primary (or refinance as primary) and then due to personal circumstances have to relocate, and therefore must rent it out. Most of them have been able to do so with no issues. The two most important things to look at are (1) whether your condo association has any restrictions (most don't) and (2) whether your refinance papers that you signed disallow it.
Hope this helps. Feel free to contact me anytime with questions
Equity Capital Real Estate
(203) 280 3838
First you want to check with the home owner's association to determine whether or not you can rent out your unit as some complexes have restrictions on this issue.
Also, you probably received a lower interest rate on your refinance due to it being owner occupied. I suggest that you contact your lender to inquire what additional fees may apply and what the change in the interest rate may be if you decide to turn it into an investment property.
Good luck to you!
Prudential Connecticut Realty