Generac Power Systems 04758-1, 04759-1, 04760-1 Before Initial START-UP, Electrical Checks

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Section 2 — Post Installation Start-up and Adjustments

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

The following procedures are to be observed:

Wear full eye protection and protective clothing;

Where electrolyte contacts the skin, wash it off immediately with water;

Where electrolyte contacts the eyes, immediately flush thoroughly with water and seek medical attention; and

Spilled electrolyte is to be washed down with an acid neutralizing agent. A common practice is to use a solution of 1 pound (500 grams) bicarbonate of soda to 1 gallon (4 liters) or water. The bicar- bonate of soda solution is to be added until the evidence of reaction (foaming) has ceased. The resulting liquid is to be flushed with water and the area dried.

Lead-acid batteries present a risk of fire because they generate hydrogen gas. The following procedures are to be followed:

DO NOT SMOKE when near the battery;

DO NOT cause flame or spark in battery area; and

Discharge static electricity from body before touch- ing the battery by first touching a grounded metal surface.

Be sure the AUTO/OFF/MANUAL switch is set to ! the OFF position before connecting the battery cables. If the switch is set to AUTO or MANUAL,

the generator can crank and start as soon as the battery cables are connected.

Be sure the utility power supply is turned off, or sparking may occur at the battery posts as the cables are attached and cause an explosion.

2.1BEFORE INITIAL START-UP

Before starting, complete the following:

1.Set the generator’s main circuit breaker to its OFF (or open) position.

2.Set the generator's AUTO/OFF/MANUAL switch to the OFF position.

3.Turn OFF the utility power supply to the transfer switch using the means provided (such as the utility main line circuit breaker).

4.Check the engine crankcase oil level and, if nec- essary, fill to the dipstick FULL mark with the recommended oil. Do not fill above the FULL mark.

5.Check the fuel supply. Gaseous fuel lines must have been properly purged and leak tested in accordance with applicable fuel-gas codes. All fuel shutoff valves in the fuel supply lines must be open.

Never operate the engine with the oil level

!below the “Add” mark on the dipstick. Doing this could damage the engine.

2.2CHECK TRANSFER SWITCH

OPERATION

Refer to Section 3.5, of the owner’s manual for man- ual operation procedures.

DANGER

Do not attempt manual transfer switch opera- tion until all power voltage supplies to the transfer switch have been positively turned off. Failure to turn off all power voltage supplies will result in extremely hazardous and possibly fatal electrical shock.

2.3ELECTRICAL CHECKS

Complete electrical checks as follows:

1.Turn on the utility power supply to the transfer switch using the means provided (such as a utili- ty main line circuit breaker).

DANGER

The transfer switch is now electrically “hot.” Contact with “hot” parts will result in extreme- ly hazardous and possibly fatal electrical shock. Proceed with caution.

2.Use an accurate AC voltmeter to check utility power source voltage across terminals N1 and N2. Nominal line-to-line voltage should be 240 volts AC.

3.Check utility power source voltage across termi- nals N1 and the transfer switch neutral lug; then across terminal N2 and neutral. Nominal line-to- neutral voltage should be 120 volts AC.

4.When certain that utility supply voltage is com- patible with transfer switch and load circuit rat- ings, turn OFF the utility power supply to the transfer switch.

5.Set the generator's main circuit breaker to its OFF (or open) position. Initial tests will be con- ducted at no-load condition.

6.On the generator panel, set the AUTO/OFF/MAN- UAL switch to MANUAL. The engine should crank and start.

7.Let the engine warm up for about five minutes to allow internal temperatures to stabilize. Then, set the generator’s main circuit breaker to its ON (or closed) position.

DANGER

Proceed with caution! Generator power voltage is now supplied to the transfer switch. Contact with live transfer switch parts will result in dangerous and possibly fatal electrical shock.

10 Generac® Power Systems, Inc.

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Contents Installation Introduction Post Installation Start-up Adjustments MaintenanceTroubleshooting Introduction Inside Front CoverGeneral Hazards Electrical Hazards ‹ Standards IndexUNPACKING/INSPECTION Protection SystemsSystem SET LED Generator 7 kW, Single Cylinder GH-410 EngineSpecifications ‹ 1.5.1 Generator‹ 1.5.2 Engine Reconfiguring the Fuel System Fuel Requirements RecommendationsFuel Consumption 1 7 KW, 410CCTransfer Switch LocationGenerator 2.1 7 kW, 12 kW and 15 kW UnitsBattery Installation BatteryCheck Transfer Switch Operation Before Initial START-UPElectrical Checks Generator Tests Under Load Checking Automatic OperationAdjusting the Regulator Natural GAS only Engine Governor Adjustment1 7 KW Units Voltage Regulator Adjustment BREAK-IN Procedure2 12 KW and 15 KW Units Automatic Transfer Operation Sequence of Automatic Operation‹ 3.2.1 Auto Position ‹ 3.2.2 OFF Position‹ 3.5.2 Transfer Back to Utility Power Source Manual Transfer OperationSetting the Exercise Timer ‹ 3.7.1 LOW OIL Pressure Switch‹ 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 Battery Maintenance Spark PlugsAdjusting Valve Clearance Cooling SystemOUT of Service Procedure ‹ 4.12.2 Return to Service‹ 4.12.1 Removal from Service Corrosion ProtectionService Schedule SYSTEM/COMPONENT Procedure FrequencyTroubleshooting Guide Problem Cause CorrectionElectrical Data Customer Battery SCR Electrical Data Connection BCR SW1 Exploded Views and Parts Lists Part NO.QTY. Description Exploded Views and Parts Lists Part NO. QTY. Description 140 Part NO. QTY Description Exploded Views and Parts Lists QTY Description 14 20 ADAPTOR, Engine Exploded Views and Parts Lists Stator 12KW Exploded Views and Parts Lists PIN, Piston D20 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 Warranty Schedule

04758-1, 04759-1, 04760-1 specifications

Generac Power Systems is a leading manufacturer of power generation equipment, particularly known for its innovative solutions in backup and portable power. Among its impressive product lineup, the Generac models 04758-1, 04759-1, and 04760-1 stand out for their reliability and advanced features, making them ideal choices for residential and commercial applications.

The Generac 04758-1 is a robust standby generator that delivers a powerful output of 22kW. It is designed to automatically kick in during power outages, ensuring that homes remain powered without the need for manual intervention. One of its main features is the innovative Mobile Link app, which allows users to monitor their generator's status remotely through their smartphones. This model also incorporates Generac's G-Force engine, which is designed with durability in mind, providing longer run times and enhanced performance.

The 04759-1 model builds on its predecessor's strengths by enhancing its power capabilities. With a 24kW output, it efficiently supplies power to larger homes or small businesses that require reliability during outages. Its True Power Technology ensures clean power output, making it suitable for sensitive electronics. The 04759-1 also boasts advanced diagnostic features, allowing for self-testing and maintenance alerts, which contribute to its user-friendly design.

Moving up in the lineup, the Generac 04760-1 generator further amplifies power output, reaching an impressive 26kW. This model is tailored for those who demand the utmost in power reliability, featuring an aluminized steel enclosure that enhances durability and rust resistance. The 04760-1 is equipped with Wi-Fi connectivity, enabling real-time updates and notifications directly to users’ mobile devices. Its superior sound attenuated design operates quietly, ensuring minimal disruption during operation.

All three models are equipped with the Quiet-Test technology, which allows for a low-decibel exercise cycle that reduces noise levels without sacrificing performance. Additionally, Generac back them with a comprehensive warranty and customer support, assuring consumers of their long-term reliability and effectiveness. With advanced features, superior performance, and innovative technology, the Generac 04758-1, 04759-1, and 04760-1 models offer dependable solutions for power generation needs, catering to a diverse range of applications while ensuring peace of mind during power interruptions.