Manuals / Generac Power Systems / Lawn and Garden / Portable Generator

Generac Power Systems 04758-2, 04759-2, 04760-2 Specifications, ‹ 1.5.1 GENERATOR, ‹ 1.5.2 ENGINE

Models: 04758-2, 04759-2, 04760-2

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1.5 SPECIFICATIONS

Section 1 — General Information

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

1.5 SPECIFICATIONS

1.5.1 GENERATOR

		Model 04758		Model 04759	Model 04760
Rated Max. Continuous Power Capacity (Watts*)		6,000 NG/7,000 LP		12,000 NG/12,000 LP	13,000 NG/15,000 LP†
Rated Voltage		120/240		120/240	120/240
Rated Max. Continuous Load Current (Amps)
	120 Volts +	50.0 NG/58.3 LP		100.0 NG/100.0 LP	108.3 NG/125.0 LP
	240 Volts	25.0 NG/29.2 LP		50.0 NG/50.0 LP	54.2 NG/62.5 LP
Main Line Circuit Breaker		30 Amp		50 Amp	70 Amp
Phase		1		1	1
Number of Rotor Poles		2		2	2
Rated AC Frequency		60 Hz		60 Hz	60 Hz
Power Factor		1		1	1
Recommended Air Filter		Generac Part # C8127		Generac Part # C8127	Generac Part # C8127
Battery Requirement		Group 26/26R		Group 26/26R	Group 26/26R
at -17.8° C (0° F)		12 Volts and		12 Volts and	12 Volts and
		350 Cold-cranking		525 Cold-cranking	525 Cold-cranking
		Amperes Minimum		Amperes Minimum	Amperes Minimum
Weight		452 Pounds		470 Pounds	487 Pounds
Output Sound Level @ 23 ft (7m) at full load		68 db (A)		70.5db (A)	71.5 db (A)
Normal Operating Range			-20°F (-28.8°C) to 104°F (40°C)

*Maximum wattage and current are subject to and limited by such factors as fuel Btu content, ambient temperature, altitude, engine power and condition, etc. Maximum power decreases about 3.5 percent for each 1,000 feet above sea level; and also will decrease about 1 percent for each 6° C (10° F) above 16° C (60° F).

+Total current in TWO separate curcuits. Current in each curcuit must not exceed the value stated for 240V.

1.5.2 ENGINE

	Model 04758	Model 04759	Model 04760
Type of Engine	GH-410	GT-990	GT-990
Number of Cylinders	1	2	2
Rated Horsepower	14.5 @ 3,600 rpm	30 @ 3,600 rpm	30 @ 3,600 rpm
Displacement	410cc	992cc	992cc
Cylinder Block	Aluminum w/Cast	Aluminum w/Cast	Aluminum w/Cast
	Iron Sleeve	Iron Sleeve	Iron Sleeve
Valve Arrangement	Overhead Valves	Overhead Valves	Overhead Valves
Ignition System	Solid-state w/Magneto	Solid-state w/Magneto	Solid-state w/Magneto
Recommended Spark Plug	RC14YC	RC12YC	RC12YC
Spark Plug Gap	0.76 mm (0.030 inch)	0.508 mm (0.020 inch)	0.508 mm (0.020 inch)
Compression Ratio	8.6:1	9.5:1	9.5:1
Starter	12 Vdc	12 Vdc	12Vdc
Oil Capacity Including Filter	Approx. 1.5 Qts	Approx. 1.7 Qts	Approx. 1.7 Qts
Recommended Oil Filter	Generac Part # 70185	Generac Part # 70185	Generac Part # 70185
Recommended Air Filter	Generac Part # 0C8127	Generac Part # 0C8127	Generac Part # 0C8127
Operating RPM	3,600	3,600	3,600

6 Generac® Power Systems, Inc.

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Generac Power Systems 04758-2, 04759-2, 04760-2 Specifications, ‹ 1.5.1 GENERATOR, ‹ 1.5.2 ENGINE, General Information

Contents

Models 04758-2 6 kW NG, 7 kW LP 04759-2 12 kW NG, 12 kW LP 04760-2 13 kW NG, 15 kW LPThis manual should remain with the unit Installation and Owner’s Manual‹ CONTENTS ‹ OPERATION AND MAINTENANCE‹ HOW TO OBTAIN SERVICE INTRODUCTIONIntroduction GENERAL HAZARDS DANGERDespite the safe design of this generator Parts of the generator are rotating and/or hotELECTRICAL HAZARDS FIRE HAZARDSEXPLOSION HAZARDS ‹ STANDARDS INDEX1.1 UNPACKING/INSPECTION 1.2 PROTECTION SYSTEMS1.3 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 Generac Power Systems, Inc1.5 SPECIFICATIONS ‹ 1.5.1 GENERATOR‹ 1.5.2 ENGINE Section 1 - General Information1.8 RECONFIGURING THE FUEL SYSTEM 1.6 FUEL REQUIREMENTS AND RECOMMENDATIONS1.7 FUEL CONSUMPTION DANGER1.9 LOCATION 1.8.2 12KW AND 15KW, 990CC ENGINES1.9.1 GENERATOR Figure 1.4 - Demand Regulator1.10 BATTERY INSTALLATION 1.11 THE BATTERY1.9.2 TRANSFER SWITCH 1.9.2.1 7 kW, 12 kW and 15 kW Units Figure 1.5 - Battery Cable Connections2.2 CHECK TRANSFER SWITCH OPERATION 2.1 BEFORE INITIAL START-UP2.3 ELECTRICAL CHECKS DANGERDANGER 2.4 GENERATOR TESTS UNDER LOAD2.5 CHECKING AUTOMATIC OPERATION Figure 2.1 - Dual Fuel Regulators 2.6 ADJUSTING THE REGULATOR NATURAL GAS ONLYFigure 2.2 - Placement of Regulator 2.7 ENGINE GOVERNOR ADJUSTMENT Figure 2.4 - V-twin Engine Governor AdjustmentFigure 2.3 - Single Cylinder Engine Governor Adjustment Figure 2.5 - V-twin Full Load Speed Adjust Screw2.8 VOLTAGE REGULATOR ADJUSTMENT 3.1 BREAK-IN PROCEDURE3.2 USING THE AUTO/OFF/MANUAL SWITCH FIGURE Figure 2.6 - Voltage Adjustment Potentiometer3.3 AUTOMATIC TRANSFER OPERATION 3.5 MANUAL TRANSFER OPERATION3.4 SEQUENCE OF AUTOMATIC OPERATION ‹ 3.5.1 TRANSFER TO GENERATOR POWER SOURCE‹ 3.5.2 TRANSFER BACK TO UTILITY POWER SOURCE ‹ 3.7.1 LOW OIL PRESSURE SWITCH‹ 3.7.2 HIGH TEMPERATURE SWITCH Figure 3.2 - Manual Transfer Switch OperationFigure 3.3 - Low Oil Pressure and High Temperature Switches 4.2 CHECKING THE ENGINE OIL LEVEL4.1 FUSE ‹ 3.7.3 OVERCRANK4.5 CHANGING THE ENGINE AIR CLEANER ‹ 4.3.2 OIL CHANGE PROCEDURE4.3 CHANGING THE ENGINE OIL 4.4 CHANGING THE OIL FILTER4.7 BATTERY MAINTENANCE Figure 4.6 - 7 kW, Engine Air Cleaner LocationFigure 4.7 - 12 kW and 15 kW Engine Air Cleaner Figure 4.8 - Setting the Spark Plug Gap4.9 COOLING SYSTEM 4.8 ADJUSTING VALVE CLEARANCEFigure 4.10 - Valve Clearance Adjustment 4.12 OUT OF SERVICE PROCEDURE ‹ 4.12.2 RETURN TO SERVICE‹ 4.12.1 REMOVAL FROM SERVICE 4.10 ATTENTION AFTER SUBMERSION4.13 SERVICE SCHEDULE 5.1 TROUBLESHOOTING GUIDE PROBLEMCAUSE CORRECTIONSection 6 - Electrical Data 24 Generac Power Systems, IncENGINE WIRING Generac Power Systems, Inc Section 6 - Electrical DataCONTROL PANEL BOX CUSTOMERElectrical Schematic - 12 & 15 kW - Drawing No. 0D8501-B 26 Generac Power Systems, IncSection 6 - Electrical Data Guardian Air-cooled 7 kW, 12 kW and 15 kW GeneratorsGenerac Power Systems, Inc Section 6 - Electrical DataSection 6 - Electrical Data 28 Generac Power Systems, IncENGINE WIRING Generac Power Systems, Inc Section 6 - Electrical DataCONTROL PANEL BOX CUSTOMER30 Generac Power Systems, Inc Section 6 - Electrical Data225A 224AElectrical Schematic - 7 kW - Drawing No. 0D9014-C Generac Power Systems, IncSection 6 - Electrical Data Guardian Air-cooled 7 kW, 12 kW and 15 kW GeneratorsSection 7 - Exploded Views and Parts Lists 32 Generac Power Systems, IncSection 7 - Exploded Views and Parts Lists Generac Power Systems, IncPART NO. QTY. DESCRIPTION PART NO. QTY. DESCRIPTIONSection 7 - Exploded Views and Parts Lists 34 Generac Power Systems, IncPART NO. QTY. DESCRIPTION Section 7 - Exploded Views and Parts ListsPART NO. QTY. DESCRIPTION Section 7 - Exploded Views and Parts Lists 36 Generac Power Systems, Inc27, 28 35, 36, 40Section 7 - Exploded Views and Parts Lists PART NO. QTYDESCRIPTION PART NO. QTY38 Generac Power Systems, Inc DESCRIPTION Section 7 - Exploded Views and Parts ListsDESCRIPTION 14 20 Section 7 - Exploded Views and Parts Lists40 Generac Power Systems, Inc Section 7 - Exploded Views and Parts Lists DESCRIPTION1.8 FT 1.25 FTSection 7 - Exploded Views and Parts Lists 42 Generac Power Systems, IncSection 7 - Exploded Views and Parts Lists DESCRIPTION2.6 FT 3 FTSection 7 - Exploded Views and Parts Lists 44 Generac Power Systems, IncSection 7 - Exploded Views and Parts Lists DESCRIPTIONSection 7 - Exploded Views and Parts Lists 46 Generac Power Systems, IncSection 7 - Exploded Views and Parts Lists DESCRIPTIONSection 7 - Exploded Views and Parts Lists 48 Generac Power Systems, IncSection 7 - Exploded Views and Parts Lists DESCRIPTION50 Generac Power Systems, Inc ALL DIMENSIONS IN MILLIMETERS INCHESSection 8 - Mounting Guardian Air-cooled 7 kW, 12 Drawing No. 0D3739-BGuardian Air-cooled 7 kW, 12 kW and 15 kW Generators Generac Power Systems, IncSection 9 - Notes YOUR WARRANTY RIGHTS AND OBLIGATIONS MANUFACTURER’S EMISSION CONTROL SYSTEM WARRANTY COVERAGEPURCHASER’S/OWNER’S WARRANTY RESPONSIBILITIES CALIFORNIA AND FEDERAL EMISSION CONTROL WARRANTY STATEMENTEMISSION RELATED PARTS INCLUDE THE FOLLOWING EMISSION CONTROL SYSTEM WARRANTYSection 10 - Warranty GENERAC POWER SYSTEMS TWO YEAR LIMITED WARRANTY FOR GUARDIAN PREPACKAGED EMERGENCY AUTOMATIC STANDBY GENERATORSSection 10 - Warranty WARRANTY SCHEDULE