weatherproof enclosure in the engine-generator set
schedule. Define corrosion resistance and/or
material required for the environment. Provide
structural loading required for the geographic area
(wind loads, snow loads, etc.). A generator set
enclosure may also be needed to mitigate excessive
noise caused by the engine generator set mechanical
components. Delete the reference to mechanical
noise limitations if an enclosure is not needed to
mitigate sound emissions. If a sound enclosure is
not provided, the designer must provide a design to
prevent excessive noise (meet OSHA requirements.
Delete this paragraph if no engine-generator set
enclosure is needed.
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The engine generator set enclosure shall be corrosion resistant and fully
weather resistant. The enclosure shall contain all set components and
provide ventilation to permit operation at rated load under secured
conditions. Doors shall be provided for access to all controls and
equipment requiring periodic maintenance or adjustment. Removable panels
shall be provided for access to components requiring periodic replacement.
The enclosure shall be capable of being removed without disassembly of the
engine-generator set or removal of components other than exhaust system.
The enclosure shall reduce the noise of the generator set to within the
limits specified in the paragraph SOUND LIMITATIONS.
1.4.8
Vibration Isolation
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NOTE: See TM 5-805-9, Power Plant Acoustics, and TM
5-805-4, Noise and Vibration Control For Mechanical
Equipment for vibration criteria. Choose between a
vibration-isolation system and the manufacturer's
standard mounting. Vibration isolation systems
should be applied where vibration transmitted
through the generator set support structure produces
(either directly or by resonant frequencies of
structural members) annoying or damaging vibration
in the surrounding environment. Select the
manufacturer's standard or provide the maximum
allowable vibration force necessary to limit the
maximum vibration. Delete the vibration isolation
requirement for applications where vibration does
not affect the floor or foundation.
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The maximum engine-generator set vibration in the horizontal, vertical and
axial directions shall be limited to 0.15 mm 6 mils (peak-peak RMS), with
an overall velocity limit of 24 mm/seconds 0.95 inches/seconds RMS, for all
speeds through 110% of rated speed. [A vibration-isolation system shall be
installed between the floor and the base. The vibration-isolation system
shall limit the maximum vibration transmitted to the floor at all
frequencies to a maximum of [_____] (peak force).] [The engine-generator
set shall be provided with vibration-isolation in accordance with the
manufacturer's standard recommendation.] Where the vibration-isolation
system does not secure the base to the structure floor or unit foundation,
seismic restraints shall be provided in accordance with the seismic
parameters specified.
SECTION 16264A
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