Fuel Pipe Size; Fuel Conversion - Kohler 18TRES Installation Manual

1.6.2

Fuel Pipe Size

Ensure that the natural gas pipe size and length meet
the specifications in Figure 1-18, Figure 1-19, or
Figure 1-20. Measure the pipe length from the primary
gas pressure regulator to the pipe connection on the
generator set fuel inlet.
measured length for each 90 degree elbow. Compare
the total pipe length with the chart in Figure 1-18,
Figure 1-19, or Figure 1-20 to find required pipe size.
Contact local LP provider for LP installation information.
Pipe Size, in. NPT
3/4
1
1 1/4
Figure 1-18 Fuel Pipe Size, Natural Gas, 8.5 kW
Pipe Size, in. NPT
3/4
1
1 1/4
Figure 1-19 Fuel Pipe Size, Natural Gas, 12 kW
Minimum Gas Pipe Size Recommendation, in. NPT
Natural Gas
(242,000 Btu/hr.)
Pipe Length, m (ft.)
8 m (25 ft.)
15 m (50 ft.)
30 m (100 ft.)
46 m (150 ft.)
61 m (200 ft.)
Figure 1-20 Fuel Pipe Size, 17/18 kW
24 Section 1 Installation
Add 2.4 m (8 ft.) to the
Maximum Pipe Length m (ft.)
18.3 m (60 ft.)
61 m (200 ft.)
91.5 m (300 ft.)
Maximum Pipe Length, m (ft.)
9.2 m (30 ft.)
30 m (100 ft.)
68.6 m (225 ft.)
LP Vapor
(280,000 Btu/hr.)
1 3/4
1 1
1 1/4 1
1 1/4 1 1/4
1 1/4 1 1/4

1.7 Fuel Conversion

The multi-fuel system allows conversion from natural
gas to LP vapor (or vice-versa) in the field while
maintaining emissions-standard compliance. A trained
technician or an authorized distributor/dealer can
convert the fuel system.
WARNING
Accidental starting.
Can cause severe injury or death.
Disconnect the battery cables before
working on the
Remove the negative (--) lead first
when disconnecting the battery.
Reconnect the negative (--) lead last
when reconnecting the battery.
Disabling the generator set.
cause severe injury or death.
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.
WARNING
Explosive fuel vapors.
Can cause severe injury or death.
Use extreme care when handling,
storing, and using fuels.
generator set.
Accidental starting can
Before working on the
TP-6514 9/09