Briggs & Stratton 040661 Installation And Operation Manual page 20

Fuel Installation Plan
WARNING
gas are extremely flammable and explosive, which
could cause burns, fire, or explosion, resulting in
death or serious injury.
• The generator features an automatic safety gas fuel
shut-off valve.
• DO NOT operate equipment if the shut-off valve is
missing or inoperative.
• Liquefied Petroleum (LP) gas is heavier than air
and settles in low areas.
• Natural gas is lighter than air and collects in high
areas.
• The slightest spark could ignite these fuels and
cause an explosion.
• DO NOT light a cigarette and DO NOT smoke.
TO THE INSTALLER: Consult with the generator
owner(s) and address any technical considerations
affecting their installation plans before applying these
guidelines.
The following general rules apply to piping on gaseous
fuel systems:
• The piping material must follow federal and local
codes, with rigid mounting and protection against
vibration.
• Protect piping from physical damage, especially where
it passes through flower and shrub beds and other
cultivated areas where damage can occur.
• Install the provided flexible fuel line (B) between the
generator fuel inlet port (A) and the rigid piping to
prevent excessive stress on the piping material due to
thermal expansion and contraction.
• Provide a union (C) or flanged connection downstream
to allow for future removal.
• Install a manometer test port (D) for vapor fuels.
Use the port to install a manometer and check if the
engine receives the proper fuel pressure adequate for
operation. See the service center for a digital or analog
manometer designed for vapor fuels only (part number
19495). After completing the initial test runs, remove
the manometer and plug the port.
• For vapor fuels only: Protect piping from freezing in
areas that are prone to the formation of hydrates or
ice. When terminating hard piping, use a sediment trap
(E) where condensate liquid cannot likely freeze.
• Install a minimum of one accessible, approved manual
shut-off valve (F) in the fuel supply line within 6 ft
(1.8 m) of the generator.
Propane and natural
• Install a manual shut-off valve in the interior of the
building.
• Increase strength and flexibility of the piping supports
and connections in areas prone to earthquakes,
tornados, flood hazards, and unstable ground.
• Ensure that the size of the piping is adequate enough
to maintain the required supply pressures and volume
flow under varying generator load conditions, with all
gas appliances connected to the fuel system turned on
and operating.
• Use a pipe sealant or joint compound approved for use
with natural gas/liquefied petroleum on all threaded
fittings to reduce the possibility of leakage.
Keep thread sealant out of the gas
piping to prevent damage to component parts.
• Properly purge and leak-test piping according to
applicable codes and standards.
Figure 9
(A) Generator Fuel Inlet
(B) Flexible Fuel Line
(C) Union Fitting
(D) Manometer Test Port
(E) Sediment Trap
(F) Manual Shut-off Valve
20
Installation
Part No. 80106286
Revision C