Generac Power Systems 004703-1 Owner's Manual page 34

Installation
Adequate, unobstructed flow of cooling and
ventilating air is critical for expelling toxic car-
bon monoxide gas and fuel vapors from the
generator compartment and for proper genera-
tor operation. Without sufficient cooling airflow,
deadly carbon monoxide gas can accumulate
and the engine/generator may quickly over-
heat, causing serious damage to the genera-
tor. Do not operate the genset in any confined
space.
The exhaust system must be installed in accor-
dance with the genset installation manual. Do
not alter the installation or permit even partial
blockage of ventilation systems, as this can
seriously affect the safe and proper operation
of the generator.
Do not operate the generator if the exhaust
system is leaking or has been damaged or if
you have experienced carbon monoxide poi-
soning symptoms during use. Shut down the
generator and do not operate it until it has
been inspected and/or repaired.
Never sleep in the vehicle while the genset is
running unless the vehicle has a working car-
bon monoxide detector.
Never tee the generator engine exhaust pipe
into the vehicle engine exhaust piping. This
causes excessive back pressure on the gen-
erator engine. Also, water from one engine can
damage the other engine.
2.6.1 MUFFLERS AND SPARK ARRESTORS
This muffler meets code and standard requirements of the U.S.
Forest Service. Use only mufflers and parts approved by the
manufacturer. Any person(s) installing an unapproved muffler,
or an unapproved exhaust system part, or modifying an exhaust
system in any way that might cause a hazard, is liable for any
damage, injury or warranty expense that might be caused by such
unapproved installation or modification.
Failure to provide and maintain a spark arrestor may be in violation
of the law. If this generator is used on any forest covered, brush
covered or grass covered unimproved land, a spark arrestor must
be provided. The vehicle owner or operator must maintain this
device in good condition. In the state of California, the preceding
is required by law (Section 4442 of the California Public Resources
Code). Other states may have similar laws. Federal laws apply on
federal lands.
When installing/replacing the tailpipe or spark arrestor compo-
nents, verify that the tailpipe has a hole to securely fasten the spark
arrestor components (see Figure 2.13). Use only manufacturer
supplied hardware. Substitution of parts may cause damage to the
screen or a loose fit to the tailpipe.
32
Figure 2.13 — Spark Arrestor Installation
O.D. 38.1 [1.50"]
3.5 [9/64"] DRILL
BOTTOM SIDE ONLY
24 [0.95"]
2.6.2 EXHAUST SYSTEM SAFETY
• Maintain a clearance of at least 3 inches (76 mm) between
exhaust system parts and any combustible material (such as
wood, felt, cotton, organic fibers or other like material). If the
3-inch (76 mm) clearance cannot be maintained, locate, insu-
late or shield the exhaust part(s) so that the temperature of any
combustible material is not raised more than 117° F (65° C)
above the ambient air temperature.
• Extend the exhaust system at least 1 inch (25 mm) past the
outer edge of the vehicle. Do not terminate the exhaust system
under the vehicle.
• Terminate the exhaust tailpipe such that exhaust gases will not
be drawn back into the generator compartment and recircu-
lated.
• If there is any possibility of the tailpipe or muffler being dam-
aged, protect these damage-prone areas by means of a protec-
tive device (such as a skid bar).
• Install the generator exhaust system according to safe automo-
tive practices.
• Use enough exhaust system hangers to prevent any part of the
system from being dislocated.
• Use exhaust system parts recommended by the manufacturer.
Using unapproved exhaust mufflers and exhaust system parts
is the responsibility of the person(s) installing such unauthor-
ized parts.
• Do not terminate the exhaust system under any opening, win-
dow or vent that can be opened or is not permanently sealed
from the vehicle interior.
• Exhaust piping must be large enough to prevent excessive back
pressure on the generator engine.
• Never tee the generator engine exhaust pipe into the vehicle
engine exhaust piping. This causes excessive back pressure on
the generator engine. Also, water from one engine can damage
the other engine.
• Plan exhaust system installation carefully. Comply with all appli-
cable codes, standards and regulations.