2‐4 General Information MN2408Room Location Often a separate building located on the site away from the main building is the most simple andcost effective. Major considerations when housing the genset in a separate building are: Maintain the building at a satisfactory temperature year round (to meet applicablecodes). Assure the genset is not located so far from the emergency loads that reliability iscompromised. The floor's load carrying capacity must be checked and must exceed the weight of thegenset and its associated equipment. Engine Cooling SystemA genset with an engine mounted radiator is the least costly to install; however, theroom must be located in a place where sufficient radiator cooling air can be broughtinto and exhausted from the room. Exhaust SystemThe exhaust system must minimize exhaust restriction. Exhaust restriction must belimited to 3 in. Hg (76 mm Hg) maximum, to ensure proper engine operation. Theexhaust system should be as short and have as few bends as possible. Room AirIf the genset is cooled with an engine mounted radiator, and sufficient air is brought intoand exhausted from the room to satisfy the radiator cooling requirements and thecombustion air requirements, the room will not overheat when the genset is running.If a remote mounted radiator or a heat exchanger is used, and adequate air iscirculated through the room to keep it at a reasonable temperature, there will beadequate air for combustion. Fuel Tanks (Diesel Only)Locate the fuel storage tank as near the genset as possible. This will minimize the costof fuel system installation and will maximize fuel system reliability. Controls and Transfer SwitchLocate the control switch gear as close to the emergency loads and the genset aspractical. This will minimize the chances that a failure of the power line to theemergency load will go undetected. In locating the switchgear, accessibility for serviceand maintenance must be considered. Genset NoiseInternal combustion engines produce noise, so the room should be located away fromoccupied buildings. In addition the genset room can be treated to reduce noisetransmission. In locating the genset room, both engine, fan and exhaust noise must beconsidered.If noise within the genset room, or noise transmitted to the surrounding parts of thebuilding are a concern, then the room must be made large enough to allow forinstallation of noise attenuating walls and noise absorbing walls.Light weight concrete blocks filled with sand or special “sound block” concrete blocksare commonly used. Noise attenuating, tight fitting windows and doors also help reducenoise transmission to the rest of the building.A double-walled room should be considered. Vibration isolators under the genset railswill also reduce the transmission of noise through the floor. Code RequirementsBuilding and safety codes deal with engine location. These requirements areconcerned with fire rated walls, a location that minimizes the possibility of damage tothe genset and interruption of the emergency system due to storms, foods, fire,vandalism, etc.Codes often deal with the need to maintain certain temperatures in the genset roomand with fuel system location. The most important codes in the USA are the NationalFire Protection Association Code Numbers 99 and 110, but local codes must also beobserved.