Reliance Industries Ltd has scheduled a planned maintenance at one of its diesel hydro treater units of the domestic tariff area refinery at the Jamnagar refining complex. The shutdown of the unit is planned for approximately two and a half weeks, starting August 28, 2012. During the period, the other diesel hydro treating units of the refinery, along with other units, including crude processing levels, will be operated at normal levels, the company said, in a statement. The opportunity will also be used to carry out other maintenance and inspection jobs during the shutdown period, the statement said.