Briggs & Stratton Home Generator System Installation & Start-Up Manual page 11

• Install the flexible, gaseous hose (supplied) between
the home generator Fuel Inlet port and rigid piping to
prevent thermal expansion or contraction from causing
excessive stress on the piping material.
NOTE: 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.
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,
contact, or run through any wall, floor, or partition.
• 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 an approved pipe sealant or joint compound 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.
Fire or explosion can cause severe burns or
death.
• Before placing the home generator into service, the fuel
system lines must be properly purged and leak tested.
• NO leakage is permitted.
Consider the following factors when planning to install the
fuel supply system:
The home 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 1.8 m of the home 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 12 to 17 mbar at full load with all
gas appliances turned on and operating.
• LP gas fuel supply pressure should be 27 to 37 mbar
at full load with all gas appliances turned on and
operating.
If necessary, an additional fuel regulator may be installed to
supply proper fuel pressure to the generator.
These Home Generators have 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 System Selection for the 9kW and 12.5kW home
generators. The 13.5kW home generator cannot be
converted from natural gas to LP gas or vice versa
It is recommended that the fuel connection incorporate the
following components:
• A manual fuel shut-off valve located in the interior of
the building.
• A manual fuel shut-off valve located outside the
building, just before the generator unit.
• 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 where condensate is not likely to freeze.
• A manometer port should be provided.
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.
NOTE: A digital manometer, P/N 19495, is available at your
local Briggs & Stratton service center.
11