Is my condo still a primary residence if I rent it out for 12 months

[J M]

I was wondering if I would be eligible for the $8000 tax credit if I:

1) purchase a condo now

Year #1: Live in the condo for one-year
Year #2: Rent the condo to someone else for one-year, while I finish Ph.D. work in another state (where I will be renting an apt.)
Year #3: Live in the condo for one-year, sell at the end of the year.