20
Fuel Conversion
The engine of your home generator system is factory
calibrated to run on natural gas (NG). It may also be operated
on liquefied petroleum (LP) vapor. The LP Conversion Kit
(supplied) is required to convert the unit to LP vapor fuel.
LP fuel inlet pressure must be between 11 and 14 inches
water column at full load with all gas appliances turned on
and operating.
To configure the fuel system for LP use:
1. Set generator’s system switch to OFF.
2. Remove 15 Amp fuse from control panel.
3. Remove roof, divider, side panels, exhaust panel and
muffler cover.
4. Change main jet in fuel mixer following instructions
provided in LP Conversion Kit.
5. Reinstall muffler cover, exhaust panel, side panels,
divider and roof.
6. Reinstall 15 Amp fuse in control panel.
7. Set generator’s system switch to AUTO.
The system is now ready to operate automatically using
LP vapor fuel.
Fuel Consumption
Estimated fuel supply requirements at half and full load for
natural gas and LP vapor fuels are shown here.
11K Watt
Natural Gas LP Vapor
1/2 Load Full Load 1/2 Load Full Load
82 C 143 C 44 C 73 C
82,000 B 143,000 B 108,350 B 181,200 B
C = Cubic feet per hour
B = BTU’s per hour
13K Watt
Natural Gas LP Vapor
1/2 Load Full Load 1/2 Load Full Load
93 C 164 C 49 C 83 C
93,000 B 164,400 B 121,600 B 207,699 B
C = Cubic feet per hour
B = BTU’s per hour
Physical
Properties
LP Vapor Natural
Gas
Normal Atmospheric
State
Gas Gas
Boiling Point (in °F):
Initial
End
-44
-44
-259
-259
Heating Value:
BTU per gallon (Net
LHV*)
BTU per gallon (gross**)
Cubic feet (gas)
83,340
91,547
2,500
63,310
1,000
Density*** 36.39 57.75
Weight† 4.24 2.65
Octane Number:
Research
Motor
110+
97
110+
* LHV (Low Heat Value) is the more realistic rating.
** Gross heat value does not consider heat lost in the form of water during
combustion.
*** Density is given in “Cubic Feet of Gas per Gallon of Liquid”.
† Weight is given in “Pounds per Gallon of Liquid”.
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