Section 5: Fuel Conversion/Gas Connections; Fuel Conversion; Fuel Requirements And Recommendations - Generac G0062700 Directrices De Instalación

Section 5: Fuel Conversion/Gas Connections

Fuel Conversion

The generator was configured for natural gas operation
at the factory. Switching over to LP Vapor is a simple
procedure.
NOTE: The fuel selection (LP/NG) must be updated on
the controller during initial power up using the Installation
Wizard.
Fuel Requirements and
Recommendations
With LP gas, use only the 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 it has been
factory set to run on natural gas. Should the primary fuel
need to be changed to LP gas, the fuel system needs to
be reconfigured. See Fuel Conversion
on converting the fuel system.
Recommended fuels should have a BTU content of at
least 1,000 BTUs per cubic foot (37.26 megajoules per
cubic meter) for natural gas; or at least 2,500 BTUs per
cubic foot (93.15 megajoules per cubic meter) for LP gas.
Ask the fuel supplier for the BTU content of the fuel.
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 water
column (19–22 mm mercury). The primary regulator for
the propane supply is NOT INCLUDED with the
generator.
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 that the fuel pressure
NEVER drops below the required fuel pressure rating.
For further information regarding NFPA requirements
refer to the NFPA website at www.nfpa.org.
Installation Guidelines For 50 Hz Air-Cooled Generators
B
Figure 5-1. Fuel Conversion Knob Locations
for instructions
Fuel Conversion/Gas Connections
NOTE: The orange fuel conversion knob (A) is located
on the top of the fuel mixer on V-twin engines (B) and
under the fuel mixer on single cylinder engines (C).
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.
A
C
Prior to installation of the generator, the installer should
consult local fuel suppliers or the fire marshal to check
codes and regulations for proper installation. To prevent
damage, local codes will mandate correct routing of
gaseous fuel line piping around gardens, shrubs, and
other landscaping.
Special considerations should be given for the flexibility
and strength of piping and connections when installing
the unit where local conditions include flooding,
tornadoes, hurricanes,
ground.
Use an approved pipe sealant or joint compound on all
threaded fittings.
All installed gaseous fuel piping must be purged and leak
tested prior to initial start–up in accordance with local
codes, standards and regulations.
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earthquakes and unstable
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