Section 2 Fuel; Fuel Requirements; Fuel Supply - Kohler 14RCA Installation Manual

2.1 Fuel Requirements

The generator set operates using natural gas or LPG
fuel. The generator set is EPA-certified for both natural
gas and LPG fuels.
The fuel system installation must comply with applicable
national, state, and local codes.
WARNING
Explosive fuel vapors.
Can cause severe injury or death.
Use extreme care when handling,
storing, and using fuels.
Explosive fuel vapors can cause severe injury or death.
Take additional precautions when using the following fuels:
Propane (LPG)—Adequate
Because propane is heavier than air, install propane gas
detectors low in a room.
manufacturer's instructions.
Natural Gas—Adequate ventilation is mandatory. Because
natural gas rises, install natural gas detectors high in a room.
Inspect the detectors per the manufacturer's instructions.
TP-7091 2/21
ventilation is mandatory.
Inspect the detectors per the
2.1.1

Fuel Supply

Because of variable climates and geographical
considerations, contact the local fuel supplier for fuel
system planning and installation. Figure 2-1 lists the
recommended fuel ratings and other fuel supply
information for natural gas and LPG fuels.
Verify that the output pressure from the primary gas
utility pressure regulator is within the range shown in
Figure 2-1 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 2-1.
See Figure 2-2 for fuel consumption. Contact the fuel
supplier for flow rate information or a gas meter
upgrade, if necessary.
Fuel type
Fuel supply inlet
Fuel supply pressure, kPa (in. H
14RCA/RCAL
20RCA/RCAL
Fuel flow rate, maximum, Btu/hr.:
14RCA/RCAL
20RCA/RCAL
Nominal Fuel Rating, Btu/ft.
Natural gas
LPG
Figure 2-1 Fuel Supply
Fuel Consumption, m
14RCA/RCAL
Fuel Type % Load
100%
75%
Natural
Gas
50%
25%
100%
75%
LPG
50%
25%
LPG conversion factors: Nominal fuel rating:
3
8.58 ft. = 1 lb.
3
0.535 m = 1 kg
3
36.39 ft. = 1 gal.
Figure 2-2 Fuel Consumption

Section 2 Fuel

Natural Gas LPG
1/2 NPT
O)
2
1.2- 2.7 1.7- 2.7
(5- 11) (7- 11)
0.9- 2.7 1.7- 2.7
(3.5- 11) (7- 11)
193,000 203,000
281,000 340,000
3
1000
2500
3
/hr. (cfh)
20RCA/RCAL
60 Hz 60 Hz
5.4 (193) 8.0 (281)
4.7 (163) 6.9 (243)
3.5 (124) 4.6 (161)
2.6 (93) 3.6 (127)
2.3 (81) 3.9 (136)
2.1 (75) 3.1 (109)
1.8 (60) 2.3 (82)
1.2 (45) 1.7 (59)
3
Natural gas: 37 MJ/m
3
(1000 Btu/ft. )
3
LPG: 93 MJ/m
3
(2500 Btu/ft. )
Section 2 Fuel 15