Installation Guide

Fuel Conversion / Gas Connections
Installation Guidelines for 60 Hz Air-Cooled Generators 21
Section 5: Fuel Conversion / Gas Connections
Fuel Requirements and
Recommendations
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 must be reconfigured. See Fuel
Conversion for instructions on converting the fuel sys-
tem.
BTU Content
Recommended fuels should have a BTU content of at
least 1,000 BTU/ft
3
(37.26 MJ/m
3
) for NG; or at least
2,500 BTU/ft
3
(93.15 MJ/m
3
) for LP gas.
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 generator fuel inlet. Required fuel
pressure for LP gas is 10–12 in water column (2.49–2.99
kPa) at generator fuel inlet.
NOTE: The primary regulator for 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 www.nfpa.org
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.
Piping strength and connections should be given special
consideration for installations 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 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 gas.
See Figure 5-1 for fuel conversion knob (A) locations.
The orange fuel conversion knob is located beneath the
fuel mixer on 10 kW units (B) and above the fuel mixer on
14 kW–24 kW units (C).
To select fuel type, turn fuel conversion knob towards
marked fuel source arrow until it stops. Fuel conversion
knob will rotate 180° and slide into mixer body when con-
verting to LP gas.
NOTE: The fuel selection (LP/NG) must be entered on
the controller during initial startup using the Install Wiz-
ard navigation menu, or in EDIT menu under “Fuel
Selection.”
Figure 5-1. Fuel Conversion Knob Locations
(000192)
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.
001878
B
A
C