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There are numerous on-line or otherwise-published
references for fuel pipe sizing. For example, NFPA 54 -
National Fuel Gas Code, 2006 (Item #: 320-6031-06) is a
common resource. The installer should consider the specific
gravity of gas and compensate for a nominal amount of
restriction from bends, fittings, etc. If an unusual number of
fittings, bends, or other restrictions are used, refer to federal
and local codes for guidance.
Fuel Conversion
The unit is shipped from the factory calibrated for NG
operation. To convert the engine from NG to LP vapor, follow
these steps:
1. Set generator’s circuit breaker to its OFF position.
2. Press and hold the control board OFF button.
3. Remove 15 Amp fuse from control board.
4. Locate the fuel selector switch (A) . Using a 6 mm
Allen wrench, turn the selector switch to either LP or
NG.
5. After all servicing has been completed, replace fuses
in transfer switch, replace 15 Amp fuse in control
board, set circuit breaker ON and press and hold
control board AUTO button.
Fuel Pipe Sizing
Air density is less at high altitudes, resulting in less available
engine power. Specifically, engine power will decrease 3.5% for
each 1,000 feet (300 meters) above sea level and 1% for each
10° F (5.6°C) above 77°F (25°C). Make sure you and your installer
consider these factors when determining total generator load.
Both LP vapor and natural gas fuel supply pressure at the
generator’s fuel inlet port should be between 7 to 11 inches
of water (in. W.C.) at full load with all gas appliances turned on
and operating.
Fuel Pressure
Power Loss
A
A
NOT
for
REPRODUCTION