Town clerk Denise Graffeo is alerting residents that some voters will see changes in their polling locations for the presidential primary on Tuesday. Precincts 2 and 2A, which had been voting at the library, will now vote at the Recreation Center, 286 Livingston St. The polling locations for Precincts 3 and 3A, which had been the senior center, have been switched to the Lowell Assembly of God, 995 Andover St. Precincts 1 and 1A will continue to vote at the senior center, 175 Chandler St., while Precincts 4 and 4A will continue to vote at the library, 300 Chandler St. Voting hours for the primary will be 7 a.m. to 8 p.m.