Install Manual

Installation Guidelines for Air-Cooled Generators 19
Section 5 Fuel Conversion/Gas Connections
5.1 — Fuel Conversion
The generator was configured for natural gas operation at the factory. Switching over to LP Vapor is a simple proce-
dure.
NOTE: The fuel selection (LP/NG) must be updated, on the controller, during initial power up using the Instal-
lation Wizard.
NOTE: The orange fuel conversion knob is located on the top of the fuel mixer on the V-twin engine and under
the fuel mixer on the single cylinder engine.
Turn the valve towards the marked fuel source arrow until it stops. If needed, use pliers to break free in correct direction
of arrow. Fuel knob will rotate 180° and slide into the mixer body when converting to LP.
Figure 5-1. Fuel Conversion Knob Locations
5.2 — Fuel Requirements and Recommendations
With LP gas, use only the vapor withdrawal system. This type of system uses the vapors formed above the liquid fuel in
the storage tank.
The engine has been fitted with a fuel carburetion system that meets the specifications of the 1997 California Air
Resources Board for tamper-proof dual fuel systems. The unit will run on natural gas or LP gas, but it has been factory
set to run on natural gas. Should the primary fuel need to be changed to LP gas, the fuel system needs to be reconfig-
ured. See the Fuel Conversion section for instructions on converting the fuel system.
Recommended fuels should have a Btu content of at least 1,000 Btus per cubic foot (37.26 megajoules per cubic
meter) for natural gas; or at least 2,500 Btus per cubic foot (93.15 megajoules per cubic meter) for LP gas. Ask the fuel
supplier for the Btu content of the fuel.
Required fuel pressure for natural gas is 3.5-7 in water column (7-13 mm mercury). Required fuel pressure for for liquid
propane vapor is 10-12 in water column (19-22 mm mercury). The primary regulator for the propane supply is NOT
INCLUDED with the generator.
FUEL KNOB LOCATIONS SHOWN FROM GENERATOR AIR BOX SIDE VIEW
FUEL KNOB
FUEL KNOB
11-22 kW GENERATORS
8 kW GENERATOR
ORANGE FUEL
CONVERSION KNOB