TM 5-6115-593-34NAVFAC P-8-631-34TO-35C2-3-463-217-74.The engine exhaust manifold should beconnected to the exhaust piping with a flexible exhaustconnector (see figure 17-20). The flexible exhaustconnector provides a means of taking up thermal growthof the exhaust system due to the hot exhaust gas andabsorbing vibration.17-75.Adequate support must be given to the exhaustpiping, no more than 4 feet (12 m) should be allowed toextend from the engine exhaust manifold withoutadequate support.Table 17-8. Exhaust Line RecommendationsNOTEWhen installing mufflers, make certain air flowdirection is correct.17-76. Exhaust piping passing through combustiblewalls or partitions shall be guarded at the point ofpassage by a metal ventilated thimble not less than 12inches (30.5 cm) larger in diameter than the exhaustpipe or metal or burned fire clay thimbles built inbrickwork providing not less than 8 inches (20.3 cm) ofinsulation between the thimble and combustible material(see figure 17-20). Exhaust pipes must not terminatenear inlet vents of any type or near combustiblematerials.17-77. Engine exhaust piping can accumulate aconsiderable amount of condensed moisture after unitshut down, particularly if the exhaust system is runthrough lengthy piping. To prevent condensed moisturefrom running back into the engine, a condensate trapand drain should be incorporated at some low pointahead of the engine manifolds (see figures 17-21through 17-23).17-78. Where vertical exhaust stack is necessary, arain cap should be fitted to exclude rain and snow fromthe exhaust pipe. Fully automatic counter-balanced raincaps are provided with each generator set.Section IX. ELECTRICAL REQUIREMENTS17-79. BATTERIES. The sets lead acid batteries areshipped dry. They can be stored indefinitely and whenready to use filled with electrolyte (acid) with a specificgravity of 1.265 to 1.280. It is recommended thatbatteries be placed on charge after electrolyte is added.17-80. Coat battery terminal connections with grease toprevent corrosion. Check the electrolyte levelperiodically. Make certain all battery vent caps are inplace and unobstructed.17-81. The integral charger will maintain batteries in afully charged condition. It will float at a very low rate toovercome the self-discharge characteristics of idlebatteries.17-82. SYSTEM DESCRIPTION. The 500 KW DODgenerator set is designed to be used as a single unit orin conjunction with as many as three additional units.Two to four units may be paralleled with the use of oneautomatic control module (ACM). Another addedfeature of the generator set is the ability to either add aremote set control box or to remove the set's control boxfor remote operation. The ACM is designed toautomatically control up to four MEP-029A, 500KWgenerator sets.17-26
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