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AR-EXP-CUMMINS-07-00 OWNERS MANUAL
Figure 1- Single Pedestal Concrete Mount
Figure 2 - Double Pedestal Concrete Mount
• A double pedestal base allows easier cleaning under
most generator's.
• Double pedestals provide better access for inspecting
for oil or fuel tank leaks.
• The generator should be retained to the pedestal base
with fasteners that are recommended by the generator
set manufacturer.
• The concrete base should extend beyond the genera-
tor's "Footprint" by at least 12 Inches (305 mm) on all
sides.
• The higher the mounting base is made, the easier the
unit will be to work on when performing maintenance,
service, or repairs. Typically bases are required to be
raised at least 6 inches (153 mm) above floor level.
Placing the unit higher than 6 inches sometimes has
the advantage of making it easier to change the unit's
oil.
• Passing fuel lines and electrical conduit for a "stub-up"
through the concrete base is a standard practice of
gen-set installers.
• Concrete foundations are typically mixed by volume.
The typical ratio of cement, sand, and aggregate is
1:2:3 with a maximum 4 inch (102 mm) slump and 28
day compressive strength of 2500 psi (173 kPa).
• A generator can typically be mounted to a combustible
floor or roof, dependent upon code, however, the sur-
face beneath the engine and beyond the engine to a
minimum distance of 12 inches (305 mm) must be
covered with a non combustible insulation and a mini-
mum of 24 gage sheet metal between the insulation
and the generator. See Figure 3.
Figure 3. Combustible Floor and Roof
• Optional vibration isolators beyond those already built
in the generator also help reduce transmitted noise,
however, it is recommended that one verify that the
generator manufacturer recommends the use of an
isolator.
• Insulation must be a non-combustible material, typi-
cally a Fiberglas mat.
3. VENTILATION
3.1. OUTDOOR INSTALLATIONS - AIR COOLED UNITS
If your generator is expected to be in temperatures lower
than -20
o
F(-29
o
C) a cold weather package may be required.
The following general rules apply:
• Where strong prevailing winds are anticipated, face the
engine end away from the wind.
• Plan the installation carefully to prevent the cooling air
vents on the generator from becoming clogged by
leaves, grass, snow, etc.
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