The Gaseous Fuel System
warning
Propane and Natural Gas are extremely flammable and explosive.
Fire or explosion can cause severe burns or death.
•LP gas is heavier than air and will settle in low areas.
•Natural gas is lighter than air and will collect in high areas.
•The slightest spark can ignite these fuels and cause an explosion.
•DO NOT light a cigarette or smoke.
The information provided below is to assist gaseous fuel system technicians in planning installations. In no way should this information be interpreted to conflict with applicable fuel gas codes. Consult with your local fuel supplier or Fire Marshall if questions or problems arise.
TO THE INSTALLER: Consult with the home generator owner(s) and convey any technical considerations that might affect their installation plans before applying these general guidelines.
The following general rules apply to gaseous fuel system piping:
•The piping should be of a material that conforms to federal and local codes, rigidly mounted and protected against vibration.
•Piping should be protected from physical damage where it passes through flower beds, shrub beds, and other cultivated areas where damage could occur.
•Install the flexible, gaseous hose (supplied) between the home generator Fuel Inlet port and rigid piping to prevent thermal expansion or contraction from causing excessive stress on the piping material.
NOTE: Where local conditions include earthquake, tornado, unstable ground, or flood hazards, special consideration shall be given to increase strength and flexibility of piping supports and connections.
caution
The supplied flexible gaseous pipe is not to be installed underground or in contact with the ground.
•The entire flexible gaseous pipe must be visible for periodic inspection and must not be concealed within, contact, or run through any wall, floor, or partition.
•Piping must be of the correct size to maintain the required supply pressures and volume flow under varying generator load conditions with all gas appliances connected to the fuel system turned on and operating.
•Use an approved pipe sealant or joint compound on all threaded fittings to reduce the possibility of leakage.
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•Installed piping must be properly purged and leak tested, in accordance with applicable codes and standards.
warning
Propane and Natural Gas are extremely flammable and explosive.
Fire or explosion can cause severe burns or death.
•Before placing the home generator into service, the fuel system lines must be properly purged and leak tested.
•No leakage is permitted.
Consider the following factors when planning to install the fuel supply system:
The home generator engine is fitted with a fuel mixer system that meets the specifications of the California Air Resources Board for
•A minimum of one accessible, approved manual shutoff valve shall be installed in the fuel supply line within
6 ft (1.8 m) of the home generator. A union or flanged connection shall be provided downstream from this valve to permit removal of controls.
•Natural gas fuel supply pressure at the generator’s fuel inlet port should be between 5 to 7 inches of water (in. W.C.) at full load with all gas appliances turned on and operating.
•LP gas fuel supply pressure should be 11 to 14 inches of water (in. W.C.) at full load with all gas appliances turned on and operating.
The Home Generator has been factory set to run on natural gas. If you need to change from natural gas to LP gas, the unit will need to be reconfigured, as described in Fuel System Selection.
It is recommended that the fuel connection incorporate the following components:
•A manual fuel
•A manual fuel
•Where the formation of hydrates or ice is known to occur, piping should be protected against freezing. The termination of hard piping should include a sediment trap where condensate is not likely to freeze.