Section 5: Fuel Conversion/Gas Connections; Fuel Requirements And Recommendations; Fuel Conversion - Generac Power Systems 15 kw ecogen Installation Manuallines

Section 5: Fuel Conversion/Gas Connections

Fuel Requirements and
Recommendations
DANGER
NOTE: Natural gas is lighter than air and will collect in
high areas. LP gas is heavier than air and will settle in
low areas.
Only LP gas should use a vapor withdrawal system. This
type of system uses the vapors formed above the liquid
fuel in the storage tank.
The unit will run on natural gas or LP gas, but has been
configured at the factory to run on natural gas.
NOTE: Should the primary fuel need to be changed to
LP gas, the fuel system needs to be reconfigured. See
the

Fuel Conversion

converting the fuel system.
Recommended fuels should have a BTU content of at
3
least 1,000 BTU/ft (37.26 MJ/m
3
least 2,500 BTU/ft (93.15 MJ/m
NOTE: BTU fuel content information is available from the
fuel supplier.
Required fuel pressure for natural gas is 3.5–7 inches
water column (7–13 mm mercury). Required fuel
pressure for liquid propane vapor is 10–12 inches H
(19–22 mm mercury).
NOTE: The primary regulator for the propane supply is
NOT INCLUDED with the generator.
Installation Guidelines for 60 Hz EcoGen™ Generator
(000192)
section for instructions on
3
) for natural gas; or at
3
) for LP gas.
A
Figure 5-1. Fuel Conversion Knob Location
NOTE: All pipe sizing, construction and layout must
comply with NFPA 54 for natural gas applications and
NFPA 58 for liquid propane applications. Once the
generator is installed, verify fuel pressure NEVER drops
below the required specification. For further information
regarding NFPA requirements refer to the NFPA website
at www.nfpa.org.
Always consult local fuel suppliers or the fire marshal to
check codes and regulations for proper installation. Local
codes will mandate correct routing of gaseous fuel line
piping around gardens, shrubs, and other landscaping.
Piping strength and connections should be given special
consideration when installation takes place in areas at
risk for; flooding, tornadoes, hurricanes, earthquakes,
and unstable ground.
IMPORTANT NOTE: Use an approved pipe sealant or
joint compound on all threaded fittings.
NOTE: All installed gaseous fuel piping must be purged
and leak tested prior to initial start–up in accordance with
local codes, standards and regulations.
Fuel Conversion
Converting from natural gas configuration to LP vapor
can be accomplished with the following procedure. See
Figure 5-1 for fuel conversion knob location.
NOTE: The fuel selection (LP/NG) must be updated on
the controller during initial power up using the Installation
Wizard in the navigation menu. See
NOTE: The orange fuel conversion knob (A) is located
on the top of the fuel mixer on V–twin engines (B).
O
2
To select the fuel type, turn the valve towards the marked
fuel source arrow until it stops. Fuel knob will rotate 180°
and slide into the mixer body when converting to LP.
B
Fuel Conversion/Gas Connections
Figure 7-5.
001237
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