Install Manual

Fuel Conversion/Gas Connections
20 Installation Guidelines for Air-Cooled Generators
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 it’s required fuel pressure rating. For further information regarding NFPA requirements refer to
their website at www.nfpa.org.
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. Local codes will mandate correct routing of gaseous fuel line piping around gar-
dens, shrubs and other landscaping to prevent any damage.
Special considerations should be given when installing the unit where local conditions include flooding, tornadoes, hur-
ricanes, earthquakes and unstable ground for the flexibility and strength of piping and their connections.
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.
5.3 — Fuel Consumption
NOTE: Required fuel pressure for natural gas is 3.5-7 in water column (7-13 mm mercury). The required fuel
pressure for LP Vapor is 10-12 in water column (19-22 mm mercury).
These are approximate values, use the appropriate spec sheet or owner’s manual for specific values.
Verify that gas meter is capable of providing enough fuel flow to include household appliances and all other loads.
Gaseous fuels such as natural gas and liquid propane (LP) gas are highly explosive.
Even the slightest spark can ignite such fuels and cause an explosion. No leakage of
fuel is permitted. Natural gas, which is lighter than air, tends to collect in high areas.
LP gas is heavier than air and tends to settle in low areas.
NOTE: A minimum of one approved full flow manual shut-off valve must be installed in the gaseous fuel sup-
ply line. The valve must be easily accessible. Local codes determine the proper location.
NOTE: The gas supply and pipe MUST be sized at 100% Load BTU / megajoule rating.
Generator
Natural Gas LP Vapor
1/2 Load Full Load 1/2 Load Full Load
8 kW 78 / 2.21 121 / 3.43 0.87 / 3.29 1.42 / 5.37
11 kW 124 / 3.51 195 / 5.52 1.18 / 4.45 1.92 / 7.28
16 kW 193 / 5.47 312 / 8.83 1.9 / 7.2 3.19 / 12.07
20 kW 205 / 5.8 308 / 8.72 2.08 / 7.87 3.85 / 14.57
22 kW 184 / 5.21 281 / 7.96 2.16 / 8.16 3.68 / 13.94
* Natural gas is in cubic feet per hour / cubic meters per hour.
** LP is in gallons per hour / liters per hour.
*** Values given are approximate.
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