TP-6984 5/17a 15Section 1 Installation
1.7.1 Fuel Supply
Because of variable climates and geographical
considerations, contact the local fuel supplier for fuel
system planning and installation. Figure 1-6 lists the
recommended fuel ratings and other fuel supply
information for natural gas and LPG fuels.
Fuel type
Natural
Gas
LPG
Fuel supply inlet 1/2 NPT
Fuel supply pressure,
kPa (in. H
2
O)
0.87--2.7
(3.5-11)
1.7 --2.7
(7-11)
Fuel flow rate, maximum, Btu/hr.:
8RESV/RESVL 99,200 160,800
10RESV/RESVL 179,000 222,500
12RESV/RESVL 216,000 257,500
Nominal Fuel Rating, Btu/ft.
3
Natural gas 1000
LPG 2500
Figure 1-6 Fuel Supply
Verify that the output pressure from the primary gas
utility pressure regulator is as shown in Figure 1-6 and
that the utility gas meter flow rate is sufficient to supply
the generator set at rated load plus all other
gas-consuming appliances. For LPG tanks, verify that
the output pressure is as shown in Figure 1-6. See
Figure 1 -9 for fuel consumption. Contact the fuel
supplier for flow rate information or a gas meter
upgrade, if necessary.
1.7.2 Fuel Pipe Size
Ensure that the fuel pipe size and length meet the
specifications in Figure 1-7. 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 1-7 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.)
8RESV/RESVL 10RESV/RESVL 12RESV/RESVL
Natural Gas
(99,200 Btu/hr.)
LPG
(160,800 Btu/hr.)
Natural Gas
(179,000 Btu/hr.)
LPG
(222,500 Btu/hr.)
Natural Gas
(216,000 Btu/hr.)
LPG
(257,500 Btu/hr.)
8 (25) 1/2 3/4 3/4 3/4 3/4 3/4
15 (50) 3/4 3/4 1 3/4 1 1
30 (100) 1 3/4 1 1 11/4 1
46 (150) 1 1 11/4 1 11/4 11/4
61 (200) 1 11/4 11/4 11/4 11/4 11/4
Figure 1-7 Fuel Pipe Size Recommendations
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