Section 5: Fuel Conversion / Gas Connections; Fuel Requirements And Recommendations; Btu Content; Fuel Pressure - Generac Power Systems EcoGen 15kW Installation Manuallines

Section 5: Fuel Conversion / Gas Connections

Fuel Requirements and
Recommendations
DANGER
Explosion and fire. Fuel and vapors are extremely
flammable and explosive. No leakage of fuel is
permitted. Keep fire and spark away. Failure to do
so will result in death or serious injury.
NOTE: NG is lighter than air and will collect in high
areas. LP gas is heavier than air and will settle in low
areas.
LP gas should only use a vapor withdrawal system. This
type of system uses vapors formed above liquid propane
in the storage tank.
The unit will run on NG or LP gas, but has been factory-
configured to run on NG.
NOTE: Should the primary fuel need to be changed to
LP gas, the fuel system needs to be reconfigured. See

Fuel Conversion

for instructions on converting the fuel
system.

BTU Content

Recommended fuels should have a BTU content of at
3
least 1,000 BTU/ft (37.26 MJ/m
3
2,500 BTU/ft (93.15 MJ/m
NOTE: BTU fuel content information is available from
fuel supplier.

Fuel Pressure

Required fuel pressure for NG is 3.5–7.0 in water column
(0.87–1.74 kPa) at the generator fuel inlet. Required fuel
pressure for LP vapor is 10–12 in water column (2.49–
2.99 kPa) at the generator fuel inlet.
NOTE: The primary regulator for the LP gas supply is
NOT INCLUDED with generator.
NOTE: All pipe sizing, construction, and layout must
comply with NFPA 54 for NG applications and NFPA 58
or ICC IFGC for LP gas applications. Verify fuel pressure
NEVER drops below required specification once genera-
tor is installed. See the NFPA website at
for further information regarding NFPA requirements.
Always contact local fuel suppliers or fire marshal to ver-
ify codes and regulations for correct installation. Local
codes will mandate correct routing of gaseous fuel line
piping around gardens, shrubs, and other landscaping.
Installation Guidelines For 60 Hz EcoGen™ Generators
(000192)
3
) for NG; or at least
3
) for LP gas.
www.nfpa.org
Fuel Conversion / Gas Connections
Piping strength and connections should be given special
consideration for installations in areas at risk for flooding,
tornadoes, hurricanes,
ground.
IMPORTANT NOTE: Use an approved pipe sealant
or joint compound on all threaded NPT fittings.
NOTE: All installed gaseous fuel piping must be purged
and leak tested prior to initial startup in accordance with
local codes, standards, and regulations.
Fuel Conversion
Proceed as follows to convert from NG configuration to
LP vapor:
See Figure 5-1. The orange fuel conversion knob (A) is
located above the fuel mixer (B). Turn fuel conversion
knob towards marked fuel source arrow until it stops to
select fuel type. Fuel conversion knob will rotate 180°
and slide into mixer body when converting to LP gas.
NOTE: The fuel selection (LP/NG) must be entered on
the controller during initial startup using the
ard Menu Map navigation menu, or in EDIT menu under
"Fuel Selection."
A
Figure 5-1. Fuel Conversion Knob Location
earthquakes, and unstable
Install Wiz-
B
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