The Gaseous Fuel System - Briggs & Stratton Fortress Installation And Operation Manual

The Gaseous Fuel System

The information below is provided to assist
gaseous fuel system technicians in planning
installations. In no way should this information
be interpreted to override applicable fuel gas
codes. Consult with your local fuel supplier or Fire
Marshall if questions or problems arise.
WARNING Propane and Natural Gas are extremely
flammable and explosive, which could cause
burns, fire or explosion resulting in death,
serious injury and/or property damage.
• LP gas is heavier than air and will settle in low areas.
• Natural gas is lighter than air and will collect in high areas.
• The slightest spark could ignite these fuels and
cause an explosion.
• DO NOT light a cigarette or smoke.
TO THE INSTALLER: Consult with the generator
owner(s) and convey any technical considerations
that might affect their installation plans before
applying these general guidelines.
The following general rules apply to gaseous fuel
system piping:
WARNING Propane and Natural Gas are extremely
flammable and explosive, which could cause
burns, fire or explosion resulting in death,
serious injury and/or property damage.
• Before placing the generator into service, the fuel system
lines must be properly purged and leak tested.
• No leakage is permitted.
NOTICE The supplied flexible steel fuel line is not to be
installed underground or in contact with the ground.
• The entire flexible steel fuel line must be visible for
periodic inspection and must not be concealed
within nor contact nor run through any wall, floor,
or partition.
• The piping should be of a material that conforms
to federal and local codes, rigidly mounted and
protected against vibration.
• Piping should be protected from physical
damage where it passes through flower beds,
shrub beds, and other cultivated areas where
damage could occur.
NOTICE The illustration is representative of a typical
installation. Your installation may differ.
• Install the flexible steel fuel line (B) (supplied)
between the generator fuel inlet port (A) and
rigid piping to prevent thermal expansion,
contraction, or any standby movement from
causing excessive stress on the piping material.
E
F
• A union (C) or flanged connection shall be
provided downstream to permit removal of standby
generator.
• A manometer port should be provided (D) . A digital
manometer, P/N 19495, is available at your Briggs &
Stratton service center. When the initial test runs are
completed, the manometer is removed and the port
is plugged. The manometer port permits temporary
installation of a manometer to ensure that the
engine receives the correct fuel pressure to operate
efficiently throughout its operating range.
• Where the formation of hydrates or ice is known
to occur, piping should be protected against
freezing. The termination of hard piping should
include a sediment trap (F) where condensate is
not likely to freeze.
• A minimum of one accessible, approved manual
shutoff valve (E) shall be installed in the fuel supply
line within 6 ft. (180 cm) of the standby generator.
• A manual fuel shut-off valve should be installed
in the interior of the building.
• Where local conditions include earthquake,
tornado, unstable ground, or flood hazards, special
consideration shall be given to increase strength
and flexibility of piping supports and connections
• Piping must be of the correct size 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 NG/LPG on all threaded fittings to
reduce the possibility of leakage.
• Installed piping must be properly purged and
leak tested, in accordance with applicable codes
and standards.
D
C
B
A
A
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