•
Using
ductwork
(Figure
23).
The
installer
must
be
sure
air
is
available
to
the
top
of
the
generator
since
air
inlets
are
located
at
the
top.
Figure
23-
Air Inlet
Using
Ductwork
ANTI·SPLASH
BAFFU
~
--,
I
~-
-----~-~',
I I ' \
',
1
GENERATOR
: ' '
I '
" ' I
> I y
_ I I
(,
,
\
\~
be:::=_~·····.·~
{(
(
AIROUT~
AIRIN
~/
.
•
By
providing
an
opening
in
the
vehicle
skirt
and
space
above
the
generator
for
cooling
air
flow
(Figure
24).
Recommended
clearance
above
the
top
of
the
generator
is
at
least
2
inches.
Figure
24-
Air Inlet
in:
Vehicle
Skirt
RECOMMENDED
CUARANCE
IS
z•
VEHICU
FLOOR
_L
c:===========~
r
MINIMUM
CUARANCE
1"
~
VEHICU
SKIRT
COMPENSATING
FOR
RESTRICTIONS
Such materials
as
screening, louvers, or expanded
metal can restrict the free flow
of
air. Compensate for
this restriction by making the
actual air opening pro-
portionately larger.
Some materials may offer only a 60 percent "free air
inlet area." Other more efficient materials may provide
up
to a
90
percent free air inlet area. The percentage
of
free air inlet opening
is
usually available from the
material
supplier or manufacturer.
TO DETERMINE THE ACTUAL AIR INLET OPEN-
ING
SIZE REQUIRED, DIVIDE 40 SQUARE INCHES
BY THE PERCENTAGE OF FREE AIR INLET AREA
FOR
THE MATERIAL YOU WILL USE.
For
example:
If
you plan to use screening with an
80% free air inlet area, divide 40 by 0.8, which results
in
50 square inches. Minimum actual size
of
air inlet
opening
in
this case
is
50 square inches.
An
opening
that measures 4 inches wide by
12-1/2 inches long
provides the required air flow ( 4 x 12.5 = 50 square
inches).
TESTING
THE
INSTALLATION
Generac recommends testing the installation to be
sure adequate
cooling air flow
is
available to the unit
before placing the unit into service.
If
the unit shows
signs of overheating, you
will need to enlarge the air
openings.
Never
place
a
unit
into
service
until
absolutely certain that cooling and ventilation
is
ade-
quate.
IMPORTANT: YOU MUST TEST THE INSTALLA-
TION ESPECIALLY IF YOU BRING
IN
AIR FROM
BELOW
THE GENERATOR SET.
-20-
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