Briggs & Stratton 40221, Installation, Start-Up And Operator'S Manual

Page: 13 / 80

INSTALLATION
13
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 18.
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 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