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ManualsBrandsCummins Power ManualsCommercial GeneratorsCummins Commercial Standby Generator — 40 kW, LP/NG, 277/480 Volts, 3-Phase
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4. Installation7-2018
39A045R241 (Issue 13) Copyright © 2018 Cummins Inc.
• Install the propane tanks according to all national and local codes and
standards, and as required by the fuel tank and fuel supplier.
Refer to the Fuel Line Selection appendix for propane figures and tables.
Propane Vapor Fuel Supply Line Size and Pressure
Fuel line size depends on the amount of fuel needed to run the generator set
at full load at the distance the fuel must be moved.
To correctly size the fuel pipe, you must also take other loads operated from
the fuel supply line into consideration, such as space heating and water
heating equipment.
Use the total fuel requirement of the generator set and other connected
appliances to determine the size of the fuel supply pipe. Use the tables and
charts in the Fuel Line Selection appendix to determine the correct pipe size.
See the Model Specifications section for fuel system specifications, including
fuel consumption and required fuel system pressure at the generator set.
See the Propane Fuel System section for a typical propane vapor installation.
See the Fuel Line Selection appendix for fuel capacity at given distances and
pipe size.
NOTICE
Make sure the fuel supply pressure at the inlet of the generator set fuel
regulator (at service port) matches the requirements in the Model
Specifications section.
Converting the Fuel System Type
For single-fuel systems, the generator set leaves the factory configured for
natural gas. No mechanical parts are required for fuel conversion. To convert
the fuel system type, configure the control.
1. Enter the Fuel System Menu.
a. From any Info Menu, hold down the up and down arrows
simultaneously for two seconds. The Service Menu appears.
b. Select Setup Menus.
c. Enter the password 574 on the Password screen. The Setup Menu
appears.
d. Select Genset Service.
e. Select Genset.
f. Advance through the screens until the Fuel System Setup Menu
appears.
2. Update the Fuel System Type on the Fuel System Setup Menu. See the
figure below.
a. Press Adjust on the Fuel System Menu.