Baldor GLC30 Installation & Operating Manual

Also see for GLC100: Installation & operating manual

Contents

Baldor GLC30 Installation & Operating Manual Manual pdf 27 page image

General Information 2-17MN2408Air System Air System ChecklistA. Air inlet faces the direction of prevailing winds.B. Air outlet does not face noise sensitive areas without noise attenuating devices.C. All heat loads have been taken into consideration in sizing air flow.D. Gravity louvers face inward for air intake and outward for discharge.E. Where electrically operated ventilation devices are used, power must be present under alloperating situations. Be certain these devices are on the emergency circuit.The room in which the generator set is to be installed must have adequate air flow through it toprovide combustion air, and remove heat radiated from the engine, exhaust system andgenerator. See Figure 2-14 for air flow calculations.Figure 2-14 Air Flow CalculationsRadiator CoolingThe engine mounted radiator shown in Figure 2-8. With an engine mounted radiator coolingsystem, air movement is provided by the engine driven radiator fan. The consultant must designthe inlet and outlet duct work and louvers to accommodate the air flow required. The radiator fanis limited in the amount of external static pressure it will tolerate. The maximum air restriction onthe discharge side of the radiator is shown under the heading of Cooling System on the EngineData Sheets. Cooling fan air flow is listed under Engine Data by dry type and water cooledexhaust manifold for 100 °F and 125 °F cooling systems.The ideal setup for cooling air would be to arrange the inlet or inlets such that relatively clean,cool, dry air is drawn across the electrical switchgear, generator, and engine. The air is thendrawn into the radiator fan, and is blown through the radiator and exhausted by duct work outsidethe building. Air inlets must be sized to minimize air restriction and provide the quantity of airrequired by the radiator fan, engine combustion air, and any other air exhausts which might beused in the room. On engine mounted radiator cooled systems, the engine mounted fan willhandle 0.25î of water column. This is combined intake and exhaust restriction.The room air intakes must be located so as to minimize drawing exhaust fumes and otheroutside contaminants into the room. Be very cautious about the location of the engine exhaustsin relation to room air intakes. Also, when locating the inlet and outlet, the consultant shouldconsider prevailing winds and noise. Motor operated louvers or properly designed and sizedgravity louvers should be used on the air intake and exhaust to minimize static pressure drop.Electric motorized louvers used with engine mounted radiators should be connected to thestandby genset and controlled to open whenever the genset is running. Operable outlet louversshould be temperature actuated on remote radiator or heat exchanger cooled units. Louvershave resistance to air flow. Openings with louvers should be twice the area of an unobstructedopening to provide proper air flow. At times duct work is necessary to provide cooling air for theroom, see Figure 2-15. Duct work must be sized and installed according to SMACNA Standards.Wind BarrierWind blowing against air exhaust or intake openings of the genset room must be considered,especially where the radiator and fan are located on the engine. Wind blowing against anexhaust opening creates restriction to the fan. Wind blowing against intake openings can blowopen gravity louvers causing low temperature and moisture problems in bad weather.