22 of 124  Construction of Giresun Wastewater Treatment Plant  Tender Dossier Volume 3 Employer’s Requirements  Section 08: Electrical Works  Exhaust silencer shall be of welded construction designed for outside mounting. Pressure drop through the  silencer shall not exceed the engine manufacturer's recommendations. The exterior of the silencer shall be  treated to resist rust.  The exhaust pipes shall be properly insulated in accordance with the recommendations of the engine  manufacturer.  On leaving the engine room, the exhaust pipe shall pass through a weather proof flange. The piping shall have  as few bends as possible.  The exhaust system shall be designed to reduce the heat transmission inside the room as much as possible.  The conceptual generator room project is as follows.  8.6.8 Starting System  Batteries (maintenance free, lead type) for starting shall be included. The battery shall have a capacity sufficient  for at least 10 abortive start attempts, each of 10 sec. duration, without recharging.  The engine shall be equipped with an alternator and voltage regulator for re-charging batteries when running as  well as a static charger with manual boost charging function. The static battery charger shall be built-in in the  DGP.  It shall be possible to start the engine from any crank position.  The cooling system shall include but not be limited to:   Radiator cooler 8.6.9 Cooling System  8_Vol3_d4 3_Section 8 electrical works_en_GIR rev6.doc 