Kohler 12RES

TP-6514 9/0924 Section 1 Installation
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. Add 2.4 m (8 ft.) to the
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 Maximum Pipe Length m (ft.)
3/4 18.3 m (60 ft.)
1 61 m (200 ft.)
11/4 91.5 m (300 ft.)
Figure 1-18 Fuel Pipe Size, Natural Gas, 8.5 kW
Pipe Size, in. NPT Maximum Pipe Length, m (ft.)
3/4 9.2 m (30 ft.)
1 30 m (100 ft.)
11/4 68.6 m (225 ft.)
Figure 1-19 Fuel Pipe Size, Natural Gas, 12 kW
Minimum Gas Pipe Size Recommendation, in. NPT
Pipe Length, m (ft.)
Natural Gas
(242,000 Btu/hr.)
LP Vapor
(280,000 Btu/hr.)
8 m (25 ft.) 1 3/4
15 m (50 ft.) 1 1
30 m (100 ft.) 11/4 1
46 m (150 ft.) 11/4 11/4
61 m (200 ft.) 11/4 11/4
Figure 1-20 Fuel Pipe Size, 17/18 kW
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.
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