Generac 004373-3 , 004626-2 owner manual Weekly Exercise Cycle, Checking the Engine OIL Level

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Section 4 — Maintenance

Guardian Liquid-cooled 40 kW Generator

Figure 3.2 – Engine Block Heater

OUTLET

INLET

Refer to applicable wiring diagram(s) and electrical schematic(s) at the back of this manual for wiring con- nections.

3.6WEEKLY EXERCISE CYCLE

The generator will start and exercise once every seven days. During this weekly exercise, the unit runs for approximately 20 minutes and shuts down. Transfer of loads to generator output does not occur during the exercise unless power is lost during the exercise period.

To select the day of the week and time of day for exer- cising, proceed as follows:

•Set the Auto/Off/Manual switch to OFF.

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

•Locate the rocker switch on the control panel identi- fied with the words “Set Exercise Time” (Figure 3.3).

•Push “Set Exercise Time” switch to the ON position for 20 to 30 seconds and then release. The switch will spring back into its original position when released.

•Wait 30 seconds before setting the Auto/Off/ Manual switch to the AUTO position.

NOTE:

The unit will exercise 20 minutes before it is set. Example: Set – Noon; Exercise – 11:40 a.m.

If you switch the Auto/Off/Manual switch is

!switched too soon, the engine may start. If engine does start, it will shut down automatically in about two (2) minutes.

•Set the generator’s main circuit breaker to its ON (or closed) position.

•The generator is now programmed to start and exer- cise every seven days thereafter, on the day and at the time of day the switch was activated.

•Place a sign on the generator’s control panel and on the transfer switch that indicates the day and time the generator will be exercising.

NOTE:

If the battery terminals are disconnected or the con- trol panel fuse is removed, the exercise timer needs to be reset for automatic exercise operation.

Figure 3.3 – “Set Exercise” Switch on Control Panel

4.1CHECKING THE ENGINE OIL LEVEL

For oil capacities, see “Specifications,” Section 1.7.2, Page 6. For engine oil recommendations, see Section

4.2.1.To check the engine oil level, proceed as follows (Figure 4.1):

1.Remove the dipstick and wipe it dry with a clean cloth.

2.Install the dipstick cap; then, remove it again. The oil level should be at the dipstick “Full” mark. If nec- essary, add oil to the “Full” mark only. DO NOT FILL ABOVE THE “FULL” MARK.

3.Install the dipstick.

Never operate the engine with the oil level below

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

14 Generac® Power Systems, Inc.

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Contents Liquid-cooled, Prepackaged Standby Generators Introduction Authorized Dealer LocationIntroduction Inside Front Cover General Hazards Electrical Hazards Prepackaged Transfer Switch UNPACKING/INSPECTIONGenerator Generator AC Connection SystemsMain Circuit Breaker SpecificationsEngine Protective Devices Fuel Requirements Recommendations ‹ 1.9.1 Conversion to LP GAS VaporCoolant Emissions Control System‹ 1.12.1 AIR Fuel Ratio Controller Standby Generator Installation Basic Standby Electric SystemNfpa Standards Other Published StandardsTransfer Switch Start Signal Connections ‹ 2.6.1 PRE-PACKAGED Type SwitchMethod Grounding the GeneratorPreparation Before START-UP Battery Installation‹ 2.7.1 Vented Batteries ‹ 2.8.2 Transfer Switch ‹ 2.8.1 Prior to Initial START-UPUsing the AUTO/OFF/MANUAL Switch Engine Heater Sequence of Automatic Operation‹ 3.2.3 Manual Position Weekly Exercise Cycle Checking the Engine OIL LevelChanging the Engine AIR Cleaner ‹ 4.2.2 OIL and Filter Change ProcedureChanging the Engine OIL and Filter ‹ 4.2.1 Engine OIL Recommendations‹ 4.5.1 Battery Replacement Battery MaintenanceSpark Plugs Miscellaneous Maintenance Cooling SystemOverload Protection for DC Fuse‹ 4.11.1 Removal from Service OUT of Service Procedure‹ 4.11.2 Return to Service Service Schedule SYSTEM/COMPONENT Procedure FrequencyTroubleshooting Guide Problem Cause CorrectionElectrical Data Not Used on Guardian Unit Electrical Data TS1 Generator D4992-A Model No Section 40 kW 0D6974 KW Generators No D6975 27 *28 Drain Pan To Oil On Oil QTY Description Base Frame Assembly M6 Hinge Panel Face Panel BTM & Back Control VDC Panel Face Cover Plate AVR ALT Leads Sensing Wire QTY Flywheel Engine Stator Leads Detail Scroll Washer Lock M12 Exploded Views and Parts Lists Engine 4.3L GM Exploded Views and Parts Lists MOUNT, Engine R & L To Thermostat Housing To Engine Block To Starter Solenoid RED Black To Engine Block Part KIT Radiator Copper Brass DIA. Clamp ASSEMBLY2 Compartment NUT Wing 1/4-20 Nylk To Stepper Motor Support Solenoid NAT GAS Attach to REGULATOR, N/G R600S Exploded Views and Parts Lists Muffler Catalyst 4.3L Assembly Motor Stepper Guardian Liquid-cooled 40 kW Generators 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 FollowingWarranty Schedule This Warranty Shall not Apply to the Following

004373-3, 004626-2, 004373-3 , 004626-2 specifications

Generac is a leader in the power generation industry, known for its reliable and innovative products. Among its extensive range of offerings, two models stand out: the Generac 004373-3 and the 004626-2. These models represent the cutting edge of home standby generators.

The Generac 004373-3 is designed to provide seamless power during outages, ensuring that homes remain comfortable and functional. One of its main features is the automatic transfer switch, which detects a power outage and activates the generator within seconds. This automatic response eliminates the need for manual intervention, allowing homeowners to go about their lives without interruption.

This model is equipped with a durable engine that runs on liquid propane or natural gas, providing flexibility depending on the availability of fuel sources. The 004373-3 has an impressive power output, capable of powering essential household appliances, including refrigerators, heating systems, and lights. Its compact design allows for easy installation, making it suitable for a variety of home sizes.

On the other hand, the Generac 004626-2 also focuses on providing reliable power but with additional advanced features. One of its key characteristics is the True Power Technology, which delivers clean and stable power, making it ideal for sensitive electronics and appliances. This feature is crucial for households that rely on digital devices, protecting them from fluctuations that could potentially cause damage.

Additionally, the 004626-2 comes with a user-friendly control panel that allows for easy monitoring and adjustments. The model also incorporates Smart Management Technology, which enables users to manage their power consumption effectively. This technology allows homeowners to prioritize the most critical circuits, ensuring essential services remain operational during outages.

Both models emphasize ease of maintenance, with a design that facilitates access to components for servicing. Generac generators are known for meeting high standards of quality, ensuring reliability and longevity. With their advanced technologies and robust features, the Generac 004373-3 and 004626-2 provide peace of mind, allowing homeowners to remain connected and powered, no matter the circumstances. Whether for unexpected outages or planned maintenance, Generac continues to set the standard in home power solutions.
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