Generac GEN10AD Manuel D'installation page 10

• Install the flexible, gaseous hose (supplied) between the
residential 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 nor
contact nor 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 residential 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 residential 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 residential 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.
• 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.
10
The residential 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 System Selection.
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.
When the initial test runs are completed, the manometer
is removed and the port is plugged. A typical final fuel
connection assembly is shown here, where (A) is the fuel
supply and (B) goes to the residential generator.
A
B