Briggs & Stratton 40220 - Manual (Page 14)

INSTALLATION
14
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 19.
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.
Fuel Consumption
See Figure 7 for estimated fuel supply requirements at half
and full load for both natural gas and LP vapor.
Figure 6 — Completed Fuel Connections
From Fuel
Supply Line
To Home Standby
Generator
Figure 5 — Temporary Manometer Installed
Natural Gas* LP Vapor**
1/2 Load Full Load 1/2 Load Full Load
80 137 33 56
* = Natural Gas is in cubic feet per hour
** = LP Vapor is in cubic feet per hour
Figure 7 — Fuel Supply Requirements