Kohler 14RES Installation Manual - Page 17

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Kohler 14RES Installation Manual

1.6 Fuel Requirements

The generator set operates using natural gas or LP
vapor fuel. The generator set is EPA-certified for both
natural gas and LP vapor fuels.
The fuel system installation must comply with the NEC
and local codes.
1.6.1

Fuel Supply

Because of variable climates and geographical
considerations, contact the local fuel supplier for fuel
system planning and installation. Figure 1-8 lists the
recommended fuel ratings and other fuel supply
information for natural gas and LP vapor fuels.
Fuel type
Fuel supply inlet
Fuel supply pressure,
kPa (in. H
O),
2
Fuel flow rate, maximum, Btu/hr.:
14RES/RESL
20RES/RESL
Nominal Fuel Rating, Btu/ft.
Natural gas
LP vapor
Figure 1-8 Fuel Supply
Verify that the output pressure from the primary gas
utility (or LP tank) pressure regulator is 1.7--2.7 kPa
(7--11 in. water column) and that the utility gas meter
flow rate is sufficient to supply the generator set at rated
load plus all other gas-consuming appliances. See
Fuel Type
% Load
100%
75%
Natural Gas
50%
25%
100%
75%
LP Vapor
50%
25%
LP vapor conversion factors:
3
8.58 ft.
= 1 lb.
3
0.535 m
= 1 kg
3
36.39 ft.
= 1 gal.
Figure 1-10 Fuel Consumption
TP-6733 8/11
Natural
LP
Gas
Vapor
1/2 NPT
1.3--2.7
1.7--2.7
(5--11)
(7--11)
193,000
203,000
281,000
340,000
3
1000
2500
14RES/RESL
60 Hz
5.4
(193)
4.7
(163)
3.5
(124)
2.6
(93)
2.3
(81)
2.1
(75)
1.8
(60)
1.2
(45)
Nominal fuel rating:
Natural gas:
LP vapor:
Figure 1-10 for fuel consumption.
supplier for flow rate information or a gas meter
upgrade.
The dimension drawing in Section 1.5 shows the
location of the fuel inlet connection.
sections to prevent fuel line breakage caused by
vibration. Hold the fuel solenoid valve with a wrench
when tightening the fuel connections. Protect all fuel
lines from machinery or equipment contact, adverse
weather conditions, and environmental damage.
1.6.2

Fuel Pipe Size

Ensure that the fuel pipe size and length meet the
specifications in Figure 1-9. 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 1-9 to find the required pipe size.
Contact local LP provider for LP installation information.
Minimum Gas Pipe Size Recommendation, in. NPT
Natural
Pipe
Gas
Length,
(193,000
m (ft.)
Btu/hr.)
8
(25)
3/4
15
(50)
1
30 (100)
1
46 (150)
1 1/4
61 (200)
1 1/4
Figure 1-9 Fuel Pipe Size Recommendations
Fuel Consumption, m
50 Hz
4.9
(175)
4.2
(148)
3.1
(108)
2.4
(84)
2.1
(74)
1.9
(68)
1.5
(53)
1.1
(40)
3
3
37 MJ/m
(1000 Btu/ft.
)
3
3
93 MJ/m
(2500 Btu/ft.
)
Contact the fuel
14RES/RESL
20RES/RESL
Natural
LP Vapor
Gas
(203,000
(281,000
Btu/hr.)
Btu/hr.)
3/4
1
3/4
1
1
1 1/4
1
1 1/4
1
1 1/4
3
/hr. (cfh)
20RES/RESL
60 Hz
8.0
(281)
6.4
6.9
(243)
5.4
4.6
(161)
3.9
3.6
(127)
2.9
3.9
(136)
2.9
3.1
(109)
2.4
2.3
(82)
1.8
1.7
(59)
1.3
Section 1 Installation
Use flexible
LP Vapor
(340,000
Btu/hr.)
3/4
1
1
1 1/4
1 1/4
50 Hz
(225)
(189)
(139)
(103)
(102)
(85)
(63)
(47)
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