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Power Systems, Inc. 29
2.5.1 MUFFLERS AND SPARK ARRESTORS
This muffler meets code and standard requirements
of the U.S. Forest Service. Use only mufflers and
parts approved by Generac. 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 dam-
age, 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, you must provide a spark arrestor.
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.
2.5.2 TYPE OF EXHAUST SYSTEM
Two types of exhaust systems for PRIMEPACT series
generators are available from Generac. They include
the following:
• “Out-the-bottom” exhaust system dimensions are
1 5/16” O.D., model 9742.
• “Out-the-side” exhaust system dimensions are
1” O.D., 18 gauge, modelS 9743 and 9326.
NOTE:
No matter what type of exhaust kit best fits your
recreational vehicle, the mounting base has open-
ings for either “bottom-out” or “side-out” exhaust
systems. Use the cover plate provided with the
generator to cover the opening you do NOT use.
2.5.3 EXHAUST SYSTEM SAFETY
• Maintain a clearance of at least 3 inches (76 mm)
between exhaust system parts and any com-
bustible material (such as wood, felt, cotton,
organic fibers or other like material). If you cannot
maintain the 3-inch (76 mm) clearance, locate,
insulate 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 recirculated.
• If there is any possibility of the tailpipe or muffler
being damaged, protect these damage-prone areas
by means of a protective device (such as a skid
bar).
• Install the generator exhaust system according to
safe automotive practices.
• Use enough exhaust system hangers to prevent any
part of the system from being dislocated.
• Use exhaust system parts recommended by
Generac. Using unapproved exhaust mufflers and
exhaust system parts is the responsibility of the
person(s) installing such unauthorized parts.
• Do not terminate the exhaust system under any
opening, window 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 applicable codes, standards and regula-
tions.
2.6 ELECTRICAL CONNECTIONS
Be sure to read Section 1.6 on Page 20.
The following general rules apply to electrical con-
nections in a recreational vehicle:
• Qualified electricians who are familiar with applic-
able codes, standards and regulations should
install electrical wiring.
• The wiring should comply with codes, standards
and regulations. The National Electrical Code
(NFPA 70), and state and local codes apply.
• Switches and circuit breakers should be of a type
approved for use in recreational vehicles and must
be mounted and installed to prevent damage from
road shock.
• Wiring must be of adequate size, have approved
insulative qualities and be properly supported.
• Conduit and wire openings into the generator com-
partment (if used) must be vapor-sealed to prevent
entry of flammable, explosive or poisonous gases
into the vehicle.
2.6.1 ELECTRICAL JUNCTION BOX
Install an approved, square electrical junction box
with a blank cover on the interior or exterior wall of
the area you plan to install the generator (NOT on the
generator). Route the generator's AC output leads
into this junction box through approved flexible con-
duit. This is the point of first termination for genera-
tor AC output leads.
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Section 2 – Installation
PRIMEPACT 50 and 70 (50Hz) Recreational Vehicle Generators