Install Manual
Table Of Contents
- Table of Contents
- 1. Important Safety Instructions
- 1.1 Warning, Caution, and Note Styles Used in This Manual
- 1.2 General Information
- 1.3 General Precautions
- 1.4 Generator Set Voltage Is Deadly
- 1.5 Engine Exhaust Is Deadly
- 1.6 Fuel and Fumes Are Flammable
- 1.7 Batteries Can Explode
- 1.8 Vented Batteries
- 1.9 Moving Parts Can Cause Severe Personal Injury or Death
- 1.10 The Hazards of Carbon Monoxide
- 2. Introduction
- 3. Pre-Installation Considerations
- 4. Installation
- 5. Startup and Configuration
- Appendix A. Fuel Line Selection
- Appendix B. Outline and System Drawings
- Appendix C. Wiring Diagrams
- Appendix D. Seismic Requirements
4. Installation 3-2016
28 A051X873 (Issue 5)Copyright © 2016 Cummins Inc.
Propane Fuel System
Propane vapor can be used as a primary fuel source or as a backup fuel source for
the generator sets with two independent fuel sources connected to the generator
set.
WARNING
Fuel leaks can lead to explosive accumulations of gas. Propane sinks in air
and can accumulate inside housings, basements, and other below-grade
spaces. Prevent gas leaks and the accumulation of gaseous fuel in the event
of a leak.
NOTICE
NFPA Standard No. 58 requires all persons handling and operating propane
to be trained in proper handling and operating procedures.
The required components in a propane vapor fuel system are as follows:
Component Description
Propane Tank Make sure to identify and utilize the correct tank size based on fuel flow
requirements and the lowest average temperature for your region. If the
tank is sized incorrectly, the generator set could run out of fuel. Refer to
the Minimum LPG Tank Size figure in the Fuel Line Selection appendix.
Shutoff Valve Useful during installation or in the event of a leak (may be required to
meet local codes).
Primary Regulator Located at the tank outlet, the primary regulator reduces the tank
pressure to the working pressure in the fuel supply line. Primary and
secondary regulators must be properly matched for a safe and functional
system. Consult with your propane supplier to ensure that the regulators
are properly sized.
Secondary
Regulator
Located near the generator set, the secondary regulator reduces the
higher line pressure to a working pressure of 6 - 12 inch water column
(1.5 - 3.0 kPa). Higher pressure before the secondary regulator is
necessary to ensure that there is enough fuel available at the secondary
regulator for a fully loaded generator set.
Fuel Line Connects to the fuel supply. It must be sized properly using the propane
fuel line sizing charts (see the Fuel Line Selection appendix).
Installation must comply with all national, state, and local codes.
Cummins Flexible
Fuel Line
Protects the fuel system from vibration, expansion, and contraction.