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19
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.
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 or
serious injury.
• 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.
The Gaseous Fuel System
B
C
E
D
F
A
• A union (C) or flanged connection shall be provided
downstream to permit removal of standby.
• 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 home 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.
WARNING Propane and Natural Gas are extremely
flammable and explosive, which could cause
burns, fire or explosion resulting in death or
serious injury.
• 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.
Not for
Reproduction
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