7
B. Above-Floor Compartment Mounting-
Construct a vapor-tight, fire-resistive
compartment of 26 gauge galvanized
steel or equivalent to isolate the genset
from the vehicle interior. Do not duct gen-
set cooling air, which can include exhaust
gases, into the vehicle for heating.
WARNING
EXHAUST GAS AND FIRE
ARE DEADLY! — Install a vapor-tight
and fire-resistive barrier of approved
materials between the genset and the
vehicle interior. — Do not duct genset
cooling air into the vehicle for heating.
3. Locate or shield the genset cooling air open-
ings (Figure 3) from direct rain, road splash and
debris thrown up by the road wheels.
4. Provide ready access for fuel and battery con-
nections and all periodic maintenance proce-
dures (Figure 1). When mounting the genset
on a floor, use Compartment Template
539-1546 to locate the cutout for the oil drain.
Do not route the exhaust tailpipe underneath
the oil drain.
WARNING
A hot exhaust tailpipe can ignite
oil drain spills causing severe personal in-
jury or death. Do not route the exhaust tail-
pipe underneath the oil drain.
5. The genset must not share a compartment or
ventilation with batteries or fuel tanks. An oper-
ating genset can ignite flammable vapors.
6. Genset cooling air (Figure 3) must not be ob-
structed.
A. Generally, the effect of natural convection
in ventilating flammable vapors and en-
gine heat after shutdown is better the high-
er the compartment air inlet. This should
be especially noted when fuel vapor lock is
an issue.
B. A free-air inlet size of at least 40 in
2
(258 cm
2
) is required. Grilles, louvers and
other kinds of decorative treatments for air
openings are restrictive. Contact the
manufacturer of the decorative assembly
or material to find out how large an opening
is required to obtain the minimum free-air
inlet size.
COOLING
AIR INLET
COOLING AIR
OUTLET
FIGURE 3. GENSET COOLING AIR INLET AND
OUTLET OPENINGS
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