Fuel Pressure; Power Loss; Fuel Conversion - Briggs & Stratton 40689 Manual De Instalación Y Operación

• Use clean, dry fuel that is free of moisture or
any particulate material. Using fuels outside the
recommended values can cause performance problems.
• In engines set up to run on propane (liquefied
petroleum), only use commercial-grade HD-5 propane.
Natural gas or LP engines are certified to operate on natural
or liquid propane gas. The emissions control system for this
engine is EM (Engine Modifications).
.

Fuel Pressure

Both liquefied petroleum and natural gas fuel supply pressure
at the generator's fuel inlet port must be a minimum value at
full load with all gas appliances turned on and in operation.
Natural Gas must be 3.5-7 inches Water Column (WC).
Liquefied Petroleum must be 11-14 inches WC.
Make sure that all gas line shut-off valves are OPEN and
that adequate fuel pressure is available whenever automatic
operation is needed. Make sure that all gas line shutoff
valves are OPEN and that adequate fuel pressure is available
whenever automatic operation is desired.

Power Loss

Air density is less at high altitudes, resulting in less available
engine power. Engine power will decrease by 3.5% for each
1,000 feet (300 m) above sea level and by 1% for each
10° F (5.6°C) above 77°F (25°C). Generators located in
these conditions must have their transfer switch adjusted
appropriately for this power decrease. See your Automatic
Transfer Switch manual on how to adjust for the power
decrease.
Fuel Pipe Size
NFPA 54 and 58 are common resources. The installer must
consider the specific gravity of gas, compensate for a nominal
amount of restriction from bends and fittings, and refer to
federal and local codes for guidance.

Fuel Conversion

The engine of your home generator system is factory
Calibrated and set to operate on natural gas (NG). It may also
be operated on liquefied petroleum (LP) vapor.
NOTICE: Units are set to NG at the factory.
The initial factory NG settings are:
• Screw C, Figure x: 2.5 turns
• Screw D, Figure x: 0.5 turns
To convert to either fuel, do the steps that follow:
1. Push the ON/OFF Switch (A, Figure 14) on the side of
the generator to the "OFF" (0) position.
2. Remove utility power to the generator to de-energize the
battery charger.
3. Remove the roof.
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4. Remove the 15 Amp fuse (B) from the fuse holder at top
of the control box.
5. Remove the front panel.
6. Disconnect the negative (-) cable at the battery.
7. Using a slotted screwdriver turn screws (C and D, Figure
15) clockwise until they are snug (over tightening can
damage the mixer port).
8. Using a slotted screw driver turn screw (C)
counterclockwise ¼ turn.
9. Leave screw (D) seated.
10. Connect the negative (-) cable at the battery.
11. Install the front panel.
12. Install the 15 Amp fuse (B, Figure 14) into the fuse holder
at top of the control box.
13. Install the roof.
14. Push the ON/OFF Switch (A) on the side of the generator
to the "ON" (I) position.
15. Open Control Panel access door and verify that the panel
is in Manual Mode.
16. Push and hold the CONFIG button to access the
configuration menu.
17. Push SELECT to edit the items in the configuration
menu.
18. To setup the generators control board for LP fuel you
will need to enter the Configuration Menu by using the
Dealer Password, which is available on the Power Portal.
19. Navigate to "SELECT PROFILE" and press select on the
correct profile for the generator. For example "12KW_LP"
for operating a 12kW unit running on LP fuel
NOTICE: Selecting a profile that is not intended for the
generator can cause the generator to run erratically and could
result in damage
20. To Save the new fuel setting, press and hold the STOP/
CONFIG button until "Saving Settings..." is displayed.
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