Installation Guide

TP-7091 2/2116 Section 2 Fuel
2.1.2 Fuel Pipe Size
Ensure that the fuel pipe size and length meet the
specifications in Figure 2-3. 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 2-3 to find the required pipe size.
Contact local LPG provider for LPG installation
information.
Minimum Gas Pipe Size Recommendation, in. NPT
Pipe
Length,
m (ft.)
14RCA/RCAL 20RCA/RCAL
Natural
Gas
(193,000
Btu/hr.)
LPG
(203,000
Btu/hr.)
Natural
Gas
(281,000
Btu/hr.)
LPG
(340,000
Btu/hr.)
8 (25) 3/4 3/4 1 3/4
15 (50) 1 3/4 1 1
30 (100) 1 1 1 1/4 1
46 (150) 1 1/4 1 1 1/4 1 1/4
61 (200) 1 1/4 1 1 1/4 1 1/4
Figure 2-3 Fuel Pipe Size Recommendations
2.1.3 Connecting the Fuel Supply
The dimension drawing in Section 6 shows the location
of the fuel inlet connection. Have the fuel supplier install
rigid gas piping and a manual fuel shut-off valve. The
fuel supply line should line up with the generator set fuel
inlet and end about 12 inches away to allow connection
with a section of flexible fuel line. Use flexible sections to
prevent fuel line breakage caused by vibration.
Note: Do not bend the flexible fuel line to make up for
misalignment of the fuel supply line and the
generator set fuel inlet.
Apply pipe sealant that is approved for fuel connections.
A factory-installed bracket prevents the fuel solenoid
valve from turning when the fuel connections are
tightened. Do not place a wrench on the coil at the top of
the fuel solenoid valve when tightening the fuel
connections. See Figure 2-4 for the recommended
wrench locations.
1
GM114166
1. Do not use a wrench on the regulator or fuel solenoid valve
in this area.
2. Place a wrench here to hold this coupling when connecting
the fuel line.
2
Figure 2-4 Holding Fuel Pipe to Tighten Fuel
Connections (Revised Fuel System
Shown)
Open the manual fuel valves and test all fuel
connections using soapy water. If a leak is found, close
the fuel valves, clean the fittings, and apply fresh
sealant. Check for fuel leaks again with the generator
set running.
Protect all fuel lines from machinery or equipment
contact, adverse weather conditions, and environmental
damage.