Owner`s manual

ENGINE COOLING AIR
The air, which will cool the engine, must be brought in from outside the building. A forced airflow of
sufficient Cubic Feet per Minute (CFM) will prevent the incoming cooling air from mixing with the air inside
the building and eventually overheating and damaging the engine. To do this requires that an exhaust fan
of sufficient CFM be placed near the generator set to exhaust the heated cooling air and to also draw in
cool external air.
The cooling air intake should be located so that the cooling air will be brought in through this intake
opening, travel across the generator set, and then be evacuated from the building via the exhaust fan.
It is recommended that the cooling air intake have at least twice the cross-sectional opening area as the
heating cooling air exhaust fan located near the generator set. It is also recommended that the air intake
opening be located as close as possible to the same level as the top of the generator set.
The exhaust fan must NOT be located where it could easily
become blocked by leaves, snow, water, debris, etc…
The cooling air intake opening of the building should be of sufficient size so as to not interfere with the
cooling air intake airflow. It is recommended that the intake opening be no less than 3 times the cross
sectional area of the exhaust fan opening. It is also recommended that this opening be located on a
vertical plane so as to not easily become plugged with debris.
If utilizing some type of covering over the intake opening (louvers, expanded metal, screening, etc…) it is
very important that the combined total of the cross-sectional area openings be no less than 3 times the
cross-sectional area of the exhaust fan opening.
The heated cooling air coming off the engine must be directed, and evacuated out of the building. An
exhaust fan of sufficient CFM will need to be used to achieve this end result. Regarding the exhaust fan
size, remember that no heated cooling air must be allowed to accumulate inside the building. For air-
cooled units of 8-12KW we recommend an exhaust fan of 2000 CFM.
Location of the exhaust fan for the engine's heated cooling air is important. It must be located so that the
heated cooling air evacuated from the building not be allowed to re-circulate back into the cooling air
intake of the building or generator set. It is also important that it not be located where leaves, snow, water,
debris, etc could easily block it…
The exhaust fan should be located near the generator set on it's right or left side. If the unit has a side
mounted muffler it is preferable to put the exhaust fan on this side. You must not position the exhaust fan
so as to pull the incoming cooling air away from the cool air intake of either the engine or the generator
end.
The exhaust fan must be connected to the AC power terminals of the generator set so that when the
generator set starts it will immediately engage to provide immediate cooling air flow. The fan will then stay
engaged until the generator set stops.
It is important to keep any and all flammable objects or materials
away from this generator set, the remote muffler and it's attached
piping, or any other potential hot component of the installation.