Generac Power Systems 04758-0 Fuel Requirements Recommendations, Fuel Consumption, 1 7 KW, 410CC

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Section 1 — General Information

Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators

1.6FUEL REQUIREMENTS

AND RECOMMENDATIONS

With LP gas, use only the vapor withdrawal

system. This type of system uses the vapors formed above the liquid fuel in the storage tank.

The engine has been fitted with a fuel carburetion system that meets the specifications of the 1997 California Air Resources Board for tamper-proof dual fuel systems. The unit will run on natural gas or LP gas, but it has been factory set to run on natural gas. Should the primary fuel need to be changed to LP gas, the fuel system needs to be reconfigured. See Section 1.8 for instructions on reconfiguration of the fuel system.

Recommended fuels should have a Btu content of at least 1,000 BTU’s per cubic foot for natural gas; or at least 2,520 BTU’s per cubic foot for LP gas. Ask your fuel supplier for the BTU content of your fuel.

3.Disconnect wire #0 and wire #14 from the gas solenoid located on the top of the demand regu- lator.

4.Remove the demand regulator by rotating coun- terclockwise.

5.Remove the brass hose fitting from the outlet port of the demand regulator.

6.Remove the brass metering jet (loosen counter- clockwise) from the housing port of the demand regulator located on the side of the regulator.

7.Install new LP metering jet (tighten clockwise) in the outlet port of the demand regulator.

8.Refit the brass hose fittings to the outlet port of the demand regulator.

9.Reverse procedure steps 1-4 to reinstall demand regulator.

10.Reverse the procedure to convert back to natural gas.

Figure 1.3 – Demand Regulator

Fuel pressure for both natural gas and liquid propane set ups should be 11 inches to 14 inches of water column (0.6 psi) at all load ranges.

NOTE:

A separate gas line and regulator may be needed to assure proper gas pressure (11-14”) to the gen- erator. Low gas pressure can cause hard starting and could affect engine durability.

1.7FUEL CONSUMPTION

 

Model #

Nat. Gas (*)

LP Vapor (**)

 

 

 

1/2 Load

Full Load

1/2 Load

Full Load

 

 

04758

74

105

0.91/33

1.21/44.1

 

 

04759

114

185

1.34/48.9

2.17/79.0

 

 

04760

148.5

240

1.73/63.2

2.80/102.3

 

 

 

 

 

 

 

 

*Natural gas is in cubic feet per hour.

**LP is in gallons per hour/cubic feet per hour.

DANGER

FUEL HOSE

FUEL HOSE

BRASS HOSE

BRASS HOSE

FITTING

FITTING

 

FUEL JET

HOUSING

HOUSING

PORTS

PORTS

NG FUEL SYSTEM

LP FUEL SYSTEM

NOTE:

The natural gas adjustment screw is preset during installation and should not need any further adjustment.

Gaseous fuels such as natural gas and liquid propane (LP) gas are highly explosive. Even the slightest spark can ignite such fuels and cause an explosion. No leakage of fuel is permitted. Natural gas, which is lighter than air, tends to collect in high areas. LP gas is heavier than air and tends to settle in low areas.

1.8RECONFIGURING THE FUEL SYSTEM

◆1.8.2 12KW AND 15KW, 990CC ENGINES

To reconfigure the fuel system from NG to LP, follow these steps:

NOTE:

The primary regulator for the propane supply is NOT INCLUDED with the generator. You must sup- ply a fuel pressure of 11 to 14 inches of water col- umn (0.6 psi) to the fuel inlet of the generator.

1. Turn off the main gas supply.

◆1.8.1 7 KW, 410CC

To reconfigure the fuel system from NG to LP, follow these steps:

1.Turn the main gas supply off.

2.Remove the carburetor fuel hose from the outlet port of the demand regulator (Figure 1.3).

2.Remove the three carburetor fuel hoses from the outlet ports of the demand regulator.

3.Disconnect wire #0 and wire #14 from the gas solenoid located on the top of the demand regu- lator.

4.Remove the demand regulator from the enclosure by rotating counterclockwise.

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Contents Installation Introduction Maintenance Post Installation Start-up AdjustmentsTroubleshooting Introduction Inside Front CoverGeneral Hazards ‹ Standards Index Electrical HazardsUNPACKING/INSPECTION Protection SystemsSystem SET LED 7 kW, Single Cylinder GH-410 Engine Your GeneratorSpecifications ‹ 1.5.1 Generator‹ 1.5.2 Engine Fuel Requirements Recommendations Reconfiguring the Fuel SystemFuel Consumption 2 12KW and 15KW, 990CC EnginesLocation Transfer SwitchGenerator 2.1 7 kW, 12 kW and 15 kW UnitsBattery Battery InstallationCheck Transfer Switch Operation Before Initial START-UPElectrical Checks Checking Automatic Operation Generator Tests Under LoadAdjusting the Regulator Natural GAS only Engine Governor Adjustment1 7 KW Units Voltage Regulator Adjustment BREAK-IN Procedure2 12 KW and 15 KW Units Sequence of Automatic Operation Automatic Transfer Operation‹ 3.2.1 Auto Position ‹ 3.2.2 OFF PositionManual Transfer Operation ‹ 3.5.2 Transfer Back to Utility Power Source‹ 3.7.1 LOW OIL Pressure Switch Setting the Exercise Timer‹ 3.7.2 High Temperature Switch ‹ 3.7.3 OvercrankChecking the Engine OIL Level Changing the Engine OIL‹ 4.3.1 Engine OIL Recommendations ‹ 4.3.2 OIL Change Procedure Changing the OIL Filter‹ 4.5.1 7 KW, 12 KW and 15 KW Generators Spark Plugs Battery MaintenanceCooling System Adjusting Valve Clearance‹ 4.12.2 Return to Service OUT of Service Procedure‹ 4.12.1 Removal from Service Corrosion ProtectionBe performed by your nearest Generac Authorized Dealer Service ScheduleProblem Cause Correction Troubleshooting GuideElectrical Data Customer Connection SM Starter Motor 1VA Engine Wiring Control Panel BOX SP Spark Plug Customer Connections Exploded Views and Parts Lists Part NO. QTY Description Exploded Views and Parts Lists Part NO. QTY. Description Kit Contains QTY Description 122 138 125 139 136 135 123 120 137 124 133 119 117 114 121 QTY Description 45 30 ADAPTOR, Engine Exploded Views and Parts Lists Stator 12KW 40 22 ASSEMBLY, Connecting ROD Exploded Views and Parts Lists SCREW, Taptite M6-1.0X8 Yellow Chrome For GT 760 Engine only CASTING, Twin Regulator Housing Mounting Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators California and Federal Emission Control Warranty Statement Emission Control System Warranty This Warranty Shall not Apply to the Following Warranty Schedule

04760-0, 04759-0, 04758-0 specifications

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