FUEL HOOKUP |
After electrical connections are complete, the next installation step is to connect a fuel supply to the unit. The fuel inlet fitting supplied with the generator is male ½" NPT and is located adjacent to a fuel access hole in the lower engine end panel as illustrated in Fig E. To accommodate potential settling of the generator relative to rigid supply pipeline, use of a flexible line to make the final connection in the supply line is suggested. When making flexible connections, use only materials rated for the fuel supplied and approved for use by local, regional or national codes and/or regulatory agencies.
DANGER 
•All fuel system installations MUST BE done by a licensed plumber or licensed gas technician and must comply with all applicable codes, standards and regulations.
WARNING
•Natural Gas and Propane Vapor are highly explosive gases. Check ALL fuel system connections for leaks before starting engine/generator set.
•DO NOT use a flame to check for leaks.
•Use approved equipment and methods to check for leaks.
FIG. E
Natural Gas (NG) |
When supplying natural gas as the operating fuel,
provide fuel with a minimum of 1000 BTU/ft3 at inlet pressures between 7" and 11" of water column (4 - 6 oz). Failure to meet these minimums will cause the generator to run poorly and/or may limit output to values below nameplate value. If fuel with these qualities is not available, a low calorific fuel system kit may be required, at additional cost. Contact the customer service center to determine if a kit is required in cases of inadequate fuel quality.
Refer to the Fuel Consumption Table on page 13 for fuel flow requirements for the unit installed. Size all feeding piping to deliver sufficient flow above the minimum pressure of 7" water column (4 oz).
Per the National Gas Code (NFPA 54 - ANSI 2223.1), a manual shutoff valve in the fuel supply line to the generator is recommended.
Once all external connections are complete, check the position of the flexible engine supply hose, as shown in Fig F. When configuring a generator to run on a specific fuel, it is necessary to verify correct positioning of the hose on the fuel pressure regulator outlet. The factory default position is for natural gas (NG), as indicated in Fig F. If the fuel hose is not in the proper position, move it to the tee branch labeled NG, making sure the brass cap is placed securely on the opposite branch. With fuel supply attached and the flexible engine supply hose on the proper branch of the regulator output, the fuel hookup is complete. The generator is supplied with a fixed orifice tuned to provide proper fuel flow and no further adjustment of the fuel system is possible or required.
14 |