Guardian Technologies 04760-2 Fuel Requirements And Recommendations, Fuel Consumption, Danger

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1.6FUEL REQUIREMENTS

Section 1 — General Information

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

1.6FUEL REQUIREMENTS

AND RECOMMENDATIONS

With LP gas, use only the vapor withdrawal sys- tem. 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 1.9 for instructions on reconfiguration of the fuel system.

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

Required fuel pressure for natural gas is 5 inches to 7 inches water colum (0.18 to 0.25 psi); and for liquid propane, 11 inches to 14 inches of water column (0.4 to 0.5 psi).

NOTE:

Any piping used to connect the generator to the fuel supply should be of adequate size to ensure the fuel pressure NEVER drops below 4 inches water colum for natural gas or 10 inches water column for liquid propane for all load ranges.

1.7FUEL CONSUMPTION

 

Model #

Nat. Gas (*)

LP Vapor (**)

 

 

 

1/2 Load

Full Load

1/2 Load

Full Load

 

 

04758

66

119

0.82/30

1.47/54

 

 

04759

152

215

1.53/56

2.08/76

 

 

04760

156

220

1.58/58

2.40/88

 

 

 

 

 

 

 

 

*Natural gas is in cubic feet per hour.

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

1.8RECONFIGURING THE FUEL SYSTEM

‹1.8.1 7 KW, 410CC

To reconfigure the fuel system from NG to LP, follow these steps (Figure 1.3):

NOTE:

The primary regulator for the propane supply is NOT INCLUDED with the generator. A fuel pres- sure of 11 to 14 inches of water column (0.4 to

0.5psi) to the fuel inlet of the generator MUST BE SUPPLIED.

1.Turn off the main gas supply (if connected).

2.Open the roof and remove the door.

3.Remove the battery (if installed).

4.Disconnect wire #0 and wire #14 from the gas solenoid on top of the demand regulator.

5.Remove the carburetor fuel hose from the outlet port of the demand regulator.

6.Remove the demand regulator by removing the fastener that retains the regulator mounting bracket.

7.Remove the square headed steel pipe plug from outlet port #1 and the brass hose barb fitting from outlet port #2.

8.Refit the brass hose barb fitting to outlet port #1 and the square headed steel pipe plug to outlet port #2.

9.Reverse procedure steps 1-5 to reinstall demand regulator.

10.Take the plastic plug supplied in the poly-bag with the generator and press it into the 3/4” hole on the bottom of the air cleaner base (Figure 4.6).

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

Figure 1.3 – Demand Regulator

DANGER

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.

FUEL HOSE

BRASS HOSE FITTING 1.7FUEL CONSUMPTION

ADJUSTMENT SCREW 1.8RECONFIGURING THE FUEL SYSTEM

HOSE & PLUG

SWITCHED SIDES

PIPE

FUEL HOSE

PLUG

 

BRASS HOSE

‹1.8.1 7 KW, 410CC FITTING

OUTLET

PORT

Figure 1.3 – Demand Regulator FUEL JET

NG FUEL SYSTEM

LP FUEL SYSTEM

7

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Contents 04760-2 13 kW NG, 15 kW LP Models 04758-2 6 kW NG, 7 kW LP 04759-2 12 kW NG, 12 kW LPThis manual should remain with the unit  Not intended for use as Primary Power in place of utility ‹ OPERATION AND MAINTENANCE ‹ CONTENTS‹ HOW TO OBTAIN SERVICE INTRODUCTIONand Adjustments Section 2 - Post Installation Start-upSection 4 - Maintenance Section 5 - TroubleshootingIMPORTANT SAFETY INSTRUCTIONS  GENERAL HAZARDS  WARNING  This product contains or emits chemicals FIRE HAZARDS   ELECTRICAL HAZARDS  EXPLOSION HAZARDS  ‹ STANDARDS INDEX1.2 PROTECTION SYSTEMS 1.1 UNPACKING/INSPECTION1.3 SYSTEM SET LED DANGER1.4 THE GENERATOR Figure 1.1 - 7 kW, Single Cylinder GH-410 EngineFigure 1.2 - 12 kW/15 kW, V-twin GT-990/760 Engine 1.5 SPECIFICATIONS ‹ 1.5.1 GENERATOR‹ 1.5.2 ENGINE 1.6 FUEL REQUIREMENTS AND RECOMMENDATIONS 1.8 RECONFIGURING THE FUEL SYSTEM1.7 FUEL CONSUMPTION DANGER‹ 1.8.2 12KW AND 15KW, 990CC ENGINES 1.9 LOCATION‹ 1.9.1 GENERATOR Figure 1.4 - Demand Regulator1.11 THE BATTERY 1.10 BATTERY INSTALLATION‹ 1.9.2 TRANSFER SWITCH 1.9.2.1 7 kW, 12 kW and 15 kW Units Figure 1.5 - Battery Cable Connections2.1 BEFORE INITIAL START-UP 2.2 CHECK TRANSFER SWITCH OPERATION2.3 ELECTRICAL CHECKS Section 2 - Post Installation Start-up and Adjustments2.5 CHECKING AUTOMATIC OPERATION 2.4 GENERATOR TESTS UNDER LOAD2.6 ADJUSTING THE REGULATOR NATURAL GAS ONLY Figure 2.2 - Placement of RegulatorFigure 2.1 - Dual Fuel Regulators Figure 2.3 - Single Cylinder Engine Governor Adjustment 2.7 ENGINE GOVERNOR ADJUSTMENTFigure 2.4 - V-twin Engine Governor Adjustment Figure 2.5 - V-twin Full Load Speed Adjust Screw3.1 BREAK-IN PROCEDURE 2.8 VOLTAGE REGULATOR ADJUSTMENTFigure 2.6 - Voltage Adjustment Potentiometer ‹ 3.2.1 “AUTO” POSITION3.4 SEQUENCE OF AUTOMATIC OPERATION 3.3 AUTOMATIC TRANSFER OPERATION3.5 MANUAL TRANSFER OPERATION ‹ 3.5.1 TRANSFER TO GENERATOR POWER SOURCE‹ 3.5.2 TRANSFER BACK TO UTILITY POWER SOURCE 3.6 SETTING THE EXERCISE TIMER‹ 3.7.1 LOW OIL PRESSURE SWITCH Figure 3.2 - Manual Transfer Switch OperationFigure 3.3 - Low Oil Pressure and High Temperature Switches ‹ 3.7.2 HIGH TEMPERATURE SWITCH4.1 FUSE 4.2 CHECKING THE ENGINE OIL LEVEL‹ 4.3.2 OIL CHANGE PROCEDURE 4.5 CHANGING THE ENGINE AIR CLEANER4.3 CHANGING THE ENGINE OIL 4.4 CHANGING THE OIL FILTERFigure 4.6 - 7 kW, Engine Air Cleaner Location 4.7 BATTERY MAINTENANCEFigure 4.7 - 12 kW and 15 kW Engine Air Cleaner Figure 4.8 - Setting the Spark Plug Gap4.8 ADJUSTING VALVE CLEARANCE Figure 4.10 - Valve Clearance Adjustment4.9 COOLING SYSTEM ‹ 4.12.1 REMOVAL FROM SERVICE 4.12 OUT OF SERVICE PROCEDURE‹ 4.12.2 RETURN TO SERVICE 4.10 ATTENTION AFTER SUBMERSION4.13 SERVICE SCHEDULE ATTENTION It is recommended that all service workbe performed by the nearest Authorized Dealer Problem 5.1 TROUBLESHOOTING GUIDECause CorrectionSection 6 - Electrical Data ENGINE WIRINGCONTROL PANEL BOX CUSTOMERCONNECTION Electrical Schematic - 12 & 15 kW - Drawing No. 0D8501-B Section 6 - Electrical Data Section 6 - Electrical Data ENGINE WIRINGSection 6 - Electrical Data 224A 225AElectrical Schematic - 7 kW - Drawing No. 0D9014-C PRE PACKAGED UNITS ONLY Section 7 - Exploded Views and Parts ListsCLOTH, HARDWARE 266.7mm x 146mm 7KW PART NO. QTY. DESCRIPTIONFOAM, EXHAUST SIDE ENCLOSURE FRONT FOAM, BACK EXHAUST ENCLOSURE COVERSection 7 - Exploded Views and Parts Lists DESCRIPTION PART NO. QTY66 2, 5, 19, 20, 39, 40, 47, 64, 93 67 8, 11, 12 68 4, 5 Views and Parts Lists69 16A, 16B, 17 72 27, 28 73 3, 32, 33, 34, 35, 36, 40ASSEMBLY, CRANKSHAFT HORIZONTAL ASSEMBLY, CRANKCASE HOUSING WITHITEM PART NO. QTY. DESCRIPTION ROLLER BEARING, GOVERNOR PLATESection 7 - Exploded Views and Parts Lists ASSY, IGNITION COIL GV-990 CYLINDER 7 kW Generator - Drawing No. 0D3504-E 1.25 FT 1.8 FT32 31 12 kW and 15 kW Generator - Drawing No. 0D3417-L2.6 FT 3 FT1.44 FT Section 7 - Exploded Views and Parts Lists DESCRIPTION Section 7 - Exploded Views and Parts ListsSection 7 - Exploded Views and Parts Lists DESCRIPTION Section 7 - Exploded Views and Parts ListsSection 7 - Exploded Views and Parts Lists DESCRIPTION Section 8 - Mounting ALL DIMENSIONS IN MILLIMETERS INCHESDrawing No Air-cooledSection 9 - Notes MANUFACTURER’S EMISSION CONTROL SYSTEM WARRANTY COVERAGE YOUR WARRANTY RIGHTS AND OBLIGATIONSPURCHASER’S/OWNER’S WARRANTY RESPONSIBILITIES CALIFORNIA AND FEDERAL EMISSION CONTROL WARRANTY STATEMENTEMISSION RELATED PARTS INCLUDE THE FOLLOWING EMISSION CONTROL SYSTEM WARRANTYWARRANTY SCHEDULE GENERAC POWER SYSTEMS TWO YEAR LIMITED WARRANTY FOR GUARDIANTHIS WARRANTY SHALL NOT APPLY TO THE FOLLOWING PREPACKAGED EMERGENCY AUTOMATIC STANDBY GENERATORS
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