Powermate PM400911 owner manual Fuel Specifications And, Consumption Requirements, Danger

FUEL SPECIFICATIONS AND

CONSUMPTION REQUIREMENTS

The engine driving the generator is engineered to provide reliable power on either Liquefied Propane Vapor (LPG) or Natural Gas. For proper operation on these fuels, it is important to deliver gas with adequate energy content, at sufficient pressure and flow rate. This is designed to operate on Liquefied Propane Vapor (LPG) with a minimum energy content of 2500 BTU per cubic foot or Natural Gas with a minimum energy content of 1000 BTU per cubic foot. This generator is designed to operate with a fuel pressure at the inlet of the unit between 7 and 11 inches of water column (4-6 ounces).

Required fuel flow rates for specific models are given in the table below. To insure correct sizing of the piping supplying fuel to the generator set, provide the flow and pressure requirements of this section to a fuel supplier or licensed plumber during the installation planning stage. If the fuel supplier cannot guarantee delivery of fuel with these properties, the generator may not perform as advertised.

Due to differences in the energy content of fuel used, it is necessary to derate the output of the generator when connected to Natural Gas. Additionally, regional and/or seasonal variations in the makeup of the fuel can further affect output of the engine/generator system. When using Natural Gas fuel with minimum properties as defined, engine output can fall approximately 10% below that of the same set using Propane Vapor.

FUEL CONSUMPTION TABLE

	LP Vapor	LP Vapor	Natural Gas
	(ft 3/hr)	(Gal/hr)	(ft 3/hr)
PM401211	81	2.2	186
PM409011	79	2.1	176

All values reflect consumption at 100% rated output.

Per the National Gas Code (NFPA 54 - ANSI 2223.1), a manual shutoff valve in the fuel supply line to the generator is recommended.

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 (NG) is highly explosive.

•Natural gas (NG) is lighter than air and collects in high places.

•Liquid propane vapor (LPG) is highly explosive.

•Liquid propane vapor (LPG) is heavier than air and collects in lower places.

•Extreme caution should be taken when working on a new installation or while performing general maintenance.

•Do not smoke when near the unit.

•Keep flames, sparks, pilot lights, arc-producing equipment, switches and all other sources of ignition well away. Keep a type ABC fire extinguisher handy.

•Potential for fire or explosion always exist when using natural gas (NG) or liquid propane vapor (LPG) as a fuel source. Install this unit in compliance with all local fuel codes.

•Do Not operate engine if smell of fuel is present or other explosive conditions exist.

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