Installation Guide

TP-7091 2/21 17Section 2 Fuel
2.2 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 trained technician
or an authorized distributor/dealer can convert the fuel
system.
After converting the fuel system, change the Fuel Type
setting on the controller. See the Operation Manual for
instructions to change settings at the controller, or use a
personal (laptop) computer and Kohler SiteTech
software to change the setting.
A revised fuel system was implemented in February,
2021. The fuel system can be identified by comparing
the regulator and solenoid valve with the illustrations in
the following sections.
The original fuel system uses fuel orifice fittings to
control the fuel flow for natural gas (NG) or LPG fuels.
The original system uses a fuel regulator and a separate
fuel solenoid valve. See Section 2.2.1 and Section 2.2.2
for illustrations and instructions to convert the fuel on
generator sets with the original design.
The revised fuel system uses a fuel regulator with a fuel
selector valve and an integrated fuel solenoid valve.
See Section 2.2.3 for illustrations and instructions to
convert the fuel on generator sets with the revised 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 an authorized
distributor/dealer, if necessary. Provide the following
information from the original nameplate:
 Model Number  kVA
 Spec Number  Amps
 Serial Number  Volts
 Fuel (original and new)  Hz
 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 equipment connected to the set, disable the
generator set as follows: (1) Press the generator set off/reset
button to shut down the generator set. (2) Disconnect the
power to the battery charger, if equipped. (3) Remove the
battery cables, negative (- ) lead first. Reconnect the negative
(- ) lead last when reconnecting the battery. Follow these
precautions to prevent the starting of the generator set by the
remote start/stop switch.
Explosive fuel vapors.
Can cause severe injury or death.
Use extreme care when handling,
storing, and using fuels.
WARNING
Explosive fuel vapors can cause severe injury or death.
Take additional precautions when using the following fuels:
Propane (LPG)—Adequate ventilation is mandatory.
Because propane is heavier than air, install propane gas
detectors low in a room. Inspect the detectors per the
manufacturer’s instructions.
Natural Gas—Adequate ventilation is mandatory. Because
natural gas rises, install natural gas detectors high in a room.
Inspect the detectors per the manufacturer’s instructions.