Generac 005031-0 (25kW), 005030-0 (15kW) owner manual Preparation Before START-UP

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Section 2 — Installation

Liquid-cooled 15, 20 and 25 kW Generators

The recommended battery is Group 26, 12VDC, 550 CCA/75 AH minimum. All batteries must be at 100 percent state-of-charge before they are installed on the generator.

When using maintenance-free batteries, it is not nec- essary to check the specific gravity or electrolyte level. Have these procedures performed at the intervals specified in Section 4, “Maintenance.” A negative ground system is used. Battery connections are shown on the wiring diagrams. Make sure all batter- ies are correctly connected and terminals are tight. Observe battery polarity when connecting batteries to the generator set.

NOTE:

Damage will result if the battery connections are made in reverse.

2.12 PREPARATION BEFORE START-UP

The instructions in this section assume that the standby generator has been properly installed, serv- iced, tested, adjusted and otherwise prepared for use by a competent, qualified installation contractor. Be sure to read the “Safety Rules” on pages 2 and 3, as well as all other safety information in this manual, before attempting to operate this (and related) equip- ment.

‹2.12.1 PRIOR TO INITIAL START-UP

Prior to initially starting the generator, it must

!be properly prepared for use. Any attempt to crank or start the engine before it has been properly serviced with the recommended types and quantities of engine fluids (oil, coolant, fuel, etc.) may result in an engine failure.

Before starting the generator for the first time, the installer must complete the following procedures. For follow-up maintenance information and/or service intervals, please refer to Section 4, “Maintenance.”

‹2.12.2 TRANSFER SWITCH

If this generator is used to supply power to any elec- trical system normally powered by an electric utility, the National Electrical Code requires that a transfer switch be installed. The transfer switch prevents elec- trical backfeed between two different electrical sys- tems, (for additional information, see the applicable transfer switch manual for this unit). The transfer switch, as well as the generator and other standby components, must be properly located and mounted in strict compliance with applicable codes, standards and regulations.

‹2.12.3 FUEL SYSTEM

Make sure the fuel supply system to the generator (a) delivers the correct fuel at the correct pressure and volume and, (b) is properly purged and leak tested according to code. No fuel leakage is permitted.

‹2.12.4 GENERATOR SET LUBRICATION

Check the engine crankcase oil level before operating and add oil to the proper level – the dipstick “FULL” mark. Never operate the engine with the oil level below the dipstick “ADD” mark. See “Specifications” and “Engine Oil Recommendations”.

NOTE:

This engine is shipped from the manufacturer with 15W-40 oil. This oil should be changed after 30 hours of operation.

‹2.12.5 ENGINE COOLANT

Have the engine cooling system properly filled with the recommended coolant mixture. Check the system for leaks and other problems. See “Specifications” and “Coolant”.

‹2.12.6 BELT TENSION

Check the engine fan belt tension and condition prior to placing the unit into service and at recommended intervals. Belt tension is correct when a force of approximately 22 pounds (10 kg), applied midway between pulleys, deflects the belt about 3/8- to 5/8- inches (10 to 16 mm).

‹2.12.7 ELECTRICAL SYSTEM

Make sure the generator is properly connected to an approved earth ground and/or ground rod.

Make sure the generator battery is fully charged, properly installed and interconnected, and ready for use.

Check to ensure that there are no loose electrical con- nections. Restrain any loose wires to keep them clear of any moving generator set components.

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Contents This manual should remain with the unit Authorized Service Dealer Location ‹ Operation and Maintenance‹ HOW to Obtain Service IntroductionTable of Contents General Hazards Electrical Hazards ‹ Standards IndexTransfer Switch Automatic Transfer Switch ATS ModeEngineered Transfer Switch Wire Start GTS Mode Generator‹ 1.8.1 LOW OIL Pressure Switch ‹ 1.8.2 High Coolant Temperature SwitchMain Circuit Breaker Generator Fuel SystemUnpacking Lifting the GeneratorFuel Consumption SpecificationsAWSF-52-C Coolant Recommendations Before InstallationEngine OIL Recommendations Generator Location Generator Mounting Support‹ 2.1.1 Nfpa Standards ‹ 2.1.2 Other Published StandardsBasic Standby Electric System Total Circuit Isolation MethodGrounding the Generator Emergency Circuit Isolation MethodConnection Diagram ATS Mode Generator AC Neutral ConnectionsConnection Diagram GTS Mode Battery Installation ‹ 2.11.1 Vented BatteriesPreparation Before START-UP Control Console Components Manual Transfer START-UPEngine Governor Gain Adjustments Bat Red Oil Red Temp Red Speed Red Crank RedAutomatic Operation Manual Retransfer ShutdownWeekly Exercise Cycle Control Board DIP Switch Settings Voltage Regulator AdjustmentExhaust Manifold Procedure Intake Manifold ProcedureCylinder Head Procedure Cooling SystemOverload Protection for Engine DC Electrical System Checking Fluid Levels‹ 4.7.2 Battery Fluid ‹ 4.8.6 Perform Visual Inspection ‹ 4.8.2 Check Battery‹ 4.7.3 Engine Coolant ‹ 4.8.1 Check Engine OIL LevelMiscellaneous Maintenance ‹ 4.8.11 Changing the Engine AIR Cleaner‹ 4.9.1 Cleaning the Generator ‹ 4.8.13 Coolant Change‹ 4.9.4 Battery Replacement ‹ 4.9.3 Battery MaintenancePeriodic Replacement Parts Scheduled Maintenance Service Maintenance Interval InformationLevel Maintenance Level Troubleshooting Points Problem Cause CorrectionLiquid-cooled 15, 20 and 25 kW Generators Liquid-cooled 15, 20 and 25 kW Generators Electrical Data Electrical Data Electrical Data Electrical Data Electrical Data Electrical Data Electrical Data Electrical Data Page Support Battery Tray Hold Down BatteryAssembly Battery Tray Battery Post Cover BlackTo B Assy Wire 14AWG 7.5 #0 GRN/YEL Door Battery CompartmentDuct Intake MID AL 2.5L Duct Discharge RH AL 2.5LPage Switch ROC Dpst 125V SPD Switch ROC Dpdt ON-OFF-ONHang TAG 2 Wire Start not Shown TOP, Control PanelPage Harness Ctrl PNL 2.5L Ford AL not Shown 13 17 Tank Coolant Recovery Engine 2.5L FordSTARTER, 12 Volt NUT HEX M10-1.5 G8 YEL CHRTo Engine Body Carburetor Assembly Cover AIR CleanerGASKET, AIR Cleaner Adapter Bracket Fuel RegulatorLocktight Rotor 390 15KW 1P Direct HSB 2.5L Ford Rotor 390 20KW 1P Direct HSB 2.5L FordRotor 390 25KW 1P Direct HSB 2.5L Ford Rotor 390 40KW 1P Direct HSB 3.9L ChryslerPipe Muffler OUT Pipe Exhaust 2.5L FordMuffler 2.5L Ford Saddle 2 InchHousing Governor Connector Cover Connector HousingASM Motor Stepper Harn GOV 2.5L FordHOSE, 2.5L Ford Lower Barbed STR 1/4 NPT X 3/8ALM Radiator 2.5L FordInstallation Diagram MANUFACTURER’S Emission Control System Warranty Coverage Your Warranty Rights and ObligationsPURCHASER’S/OWNER’S Warranty Responsibilities Emission Control System Warranty Emission Related Parts Include the FollowingThis Warranty Shall not Apply to the Following

005030-0 (15kW), 005031-0 (25kW) specifications

Generac has long been recognized as a leader in backup power solutions, and its 005031-0 (25kW) and 005030-0 (15kW) home standby generators exemplify the brand's commitment to reliability and performance. Designed for residential use, these generators provide peace of mind during outages, ensuring that homes remain powered even in the most challenging conditions.

One of the standout features of both models is their advanced Generac G-Force engine, which is engineered for longevity and impressive power output. The G-Force engine is built from the ground up for generator use, refined to handle the unique demands of continuous operation. This results in a highly durable system that requires little to no maintenance, making it a favored choice for homeowners looking for a reliable energy solution.

Another important characteristic is the True Power technology featured in both generators. This technology delivers clean, stable power that is safe for sensitive electronics and appliances. It ensures that devices such as computers and medical equipment operate smoothly without the risk of damage from power fluctuations. Additionally, the Generac 005031-0 and 005030-0 generators are equipped with the Quiet-Test mode, allowing them to run at lower RPMs during routine weekly self-tests. This innovation significantly reduces the noise produced during tests, making it less disruptive for residents.

Furthermore, these generators come with a user-friendly interface and a mobile link app, enabling homeowners to monitor their generator's performance remotely via a smartphone. This feature enhances convenience, allowing users to receive alerts and notifications about their generator's status, maintenance needs, and operation conditions right from their devices.

Both the 25kW and 15kW models are also designed with a robust transfer switch, which seamlessly shifts power from the grid to the generator in case of any outages. This automatic transfer feature ensures that homes maintain power without needing manual intervention, making them ideal for those who want uninterrupted electricity.

In terms of fuel source, both models operate on natural gas or propane, providing flexibility to homeowners regarding fuel availability and preferences. With excellent warranty options and Generac's reputation for quality, both the 005031-0 (25kW) and 005030-0 (15kW) generators stand as dependable choices for safeguarding homes from the unpredictability of power outages.
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