Over the weekend workers agreed to help restart one part of the 400,000 barrel-per-day facility, which had been idled for more than a week amid a wage dispute.

Other parts of the facility will not be restarted while there is no agreement on wages, union spokesman Jaap Bosma said, and workers will continue with a "work-to-rule" action.

(Reporting by Toby Sterling; editing by Jonathan Oatis)