Briggs & Stratton 40204 - Manual (Page 10)

INSTALLATION
10
Consider the following factors when planning to install the
fuel supply system:
The Home Generator System engine is fitted with a fuel mixer
system that meets the specifications of the California Air
Resources Board for “tamper-proof” dual fuel systems. The
unit will run on natural gas or liquefied propane (LP) vapor.
• 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 Home Generator System. 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 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 Home Generator System unit 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
on page 13.
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 (Figure 5), 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.
When the initial test runs are completed, the manometer is
removed and the port is plugged. A typical final fuel
connection assembly is shown in Figure 6.
Figure 6 — Completed Fuel Connections
Figure 5 — Temporary Manometer Installed
From Fuel
Supply Line
To Home Generator
System