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2-18 General Information MN2408
Figure 2-15 Radiator Cooling with Ducted Air Handling
Other Engine Cooling Systems
Remote radiator and heat exchanger cooled engine cooling systems will not have an engine
driven fan. As a result, the consultant must provide a means of supplying air to the room, and
exhausting it. The air movement must be provided by an electrically driven fan. This fan may be
located in the air inlet or exhaust opening. If the fan is located on the exhaust side, care must be
taken to not create a high negative pressure in the room and starve the engine of combustion air.
If the fan is located in the air inlet, it must be noted that odors may be forced into other parts of
the building if the room is not properly sealed. This electrically driven fan must be connected so
as to run whenever the generator is operating. Any fans for the engine room should be on the
emergency circuit. An example may be seen in Figure 2-16.
Figure 2-16
Engine Crankcase Ventilation
For gensets operating more than 1000 hours per year, the engine crankcase breather should be
vented upward and outside of the engine room. This prevents the buildup of oil vapors inside the
building.