Installation Guide

TP-6967 8/15 15Section 1 Installation
1.7 Fuel Conversion
The multi-fuel system allows conversion from natural
gas to LPG (or vice-versa) in the field while maintaining
emissions-standard compliance. A Kohler authorized
distributor/dealer can convert the fuel system.
Rating Change
Converting the fuel will change the generator set rating.
See the generator set specification sheet for ratings with
natural gas and LP. Order a new nameplate with the
updated rating and fuel information from a Kohler
authorized distributor/dealer, if necessary. Provide the
following information from the original nameplate:
D Model Number D kVA
D Spec Number D Amps
D Serial Number D Volts
D Fuel (original and new) D Hz
D kW
Attach the new nameplate over the old one. Do NOT
cover the UL listing information on the old nameplate.
Accidental starting.
Can cause severe injury or death.
Disconnect the battery cables before
working on the generator set.
Remove the negative (--) lead first
when disconnecting the battery.
Reconnect the negative (--) lead last
when reconnecting the battery.
WARNING
Disabling the generator set. Accidental starting can
cause severe injury or death. Before working on the
generator set or connected equipment, disable the generator
set as follows: (1) Move the generator set master switch to the
OFF position. (2) Disconnect the power to the battery charger.
(3) Remove the battery cables, negative (--) lead first.
Reconnect the negative (--) lead last when reconnecting the
battery. Follow these precautions to prevent starting of the
generator set by an automatic transfer switch, remote
start/stop switch, or engine start command from a remote
computer.
Explosive fuel vapors.
Can cause severe injury or death.
Use extreme care when handling,
storing, and using fuels.
WARNING
1.7.1 Fuel Conversion
For natural gas and LPG fuel, orifice fittings are used in
the fuel line. See Figure 1-9. The natural gas orifice
fitting is silver in color and stamped NG. The LPG fitting
is gold in color and stamped LPG. The fittings are
threaded. A straight-blade screwdriver is required to
remove and replace the fittings.
NG LPG
Figure 1-9 NG and LPG Fuel Orifice Fittings
The unit is typically shipped set up for natural gas, with
the LPG fitting tied to the fuel regulator. To convert to
LPG, remove the NG fitting and install the LPG fitting as
described below. See Figure 1-10 for the fuel system
component locations.
Procedure to Convert from NG to LPG
1. Place the generator set master switch in the
OFF/RESET position.
2. Disconnect the utility power to the generator.
3. Disconnect the generator set engine starting
battery, negative (--) lead first.
4. Turn off and disconnect the fuel supply.