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the information below is provided to assist gaseous fuel
system technicians in planning installations. in no way
should this information be interpreted to conflict with
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:
• 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.
• Install the flexible, gaseous hose (supplied) between
the generator fuel inlet port and rigid piping to
prevent thermal expansion or contraction from
causing excessive stress on the piping material.
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.
the Gaseous fuel system
• 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.
consider the following factors when planning the fuel
supply system installaton:
• Air density is less at high altitudes, resulting in less
available engine power. Specifically, engine power
will decrease 3.5% for each 1,000 feet (300 meters)
above sea level and 1% for each 10° F (5.6°C) above
77°F (25°C). Make sure you and your installer consider
these factors when determining total generator load.
• The generator engine is fitted with a fuel mixer system
that meets the specifications of the California Air
Resources Board for “tamper-proof” fuel systems.
• A minimum of one accessible, approved manual
shutoff valve shall be installed in the fuel supply line
within 6 ft (1.8 m) of the generator. A union or flanged
connection shall be provided downstream from this
valve to permit removal of controls.
• Natural gas fuel supply pressure at the generator’s
fuel inlet port should be between 5 to 7 inches of
water (in. W.C.) at full load with all gas appliances
turned on and operating.
• LP gas fuel supply pressure should be 11 to 14 inches
of water (in. W.C.) at full load with all gas appliances
turned on and operating.
The generator has been factory set to run on natural gas. If
you need to change from natural gas to LP gas, the unit will
need to be reconfigured, as described in
Fuel Conversion
.
WarninG Propane and Natural Gas are extremely flammable
and explosive.
Fire or explosion can cause severe burns or death.
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 can ignite these fuels and cause an explosion.
•
DO NOT light a cigarette or smoke.
•
caution The supplied flexible gaseous pipe is not to be
installed underground or in contact with the ground.
The entire flexible gaseous pipe must be visible for periodic
•
inspection and must not be concealed within nor contact nor run
through any wall, floor, or partition.
WarninG Propane and Natural Gas are extremely flammable
and explosive.
Fire or explosion can cause severe burns or death.
Before placing the generator into service, the fuel system lines
•
must be properly purged and leak tested.
No leakage is permitted.
•
Not
for
Reproduction
