Generac 004373-3 , 004626-2 Fuel Requirements Recommendations, ‹ 1.9.1 Conversion to LP GAS Vapor

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Section 1 — General Information

Guardian Liquid-cooled 40 kW Generator

‹1.8.1 Generator and Load Compatibility

The generator must be fully compatible with the rated voltage, number of phases and frequency of the con- nected electrical loads. The generator, connected elec- trical devices, or both, can be damaged if voltage, num- ber of phases and frequency are not compatible.

NOTE:

This manual assumes that the standby generator has been properly selected, installed and interconnected by a competent, qualified electrician or installation contractor. Once the installation is complete, do nothing that may result in noncompatibility between the generator and connected electrical loads.

1.9FUEL REQUIREMENTS

AND RECOMMENDATIONS

With LP gas, use only the vapor withdrawal system. This type of system uses the vapors formed above the liquid fuel in the storage tank.

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 your fuel supplier for the Btu content of your fuel.

Fuel pressure for both natural gas and liquid propane setups should be 11 inches to 14 inches of water column (0.6 psi) at all load ranges.

‹ 1.8.2 ENGINE

Make

General Motors

Displacement

4.3 liters (262 cu. in.)

Cylinder Arrangement

V-6

Valve Arrangement

Overhead Valves

Firing Order

1-6-5-4-3-2

Number of Main Bearings

4

Compression Ratio

9.4-to-1

No. of Teeth on Flywheel

168

Ignition System

Electronic

Ignition Timing at 1,800 rpm

40 degrees BTDC

Rated Horsepower at 1,800 rpm

67

Spark Plug Gap

0.045 inch (1.1 mm)

Recommended Spark Plugs

......AC 41-932 or equivalent

Oil Pressure

30-50 psi

Crankcase Oil Capacity

4.5 U.S. quarts (4.25 L)

Recommended Engine Oil

SAE 15W-40

Type of Cooling System

Pressurized, closed recovery

Cooling Fan

Pusher Type

Cooling System Capacity

4.5 U.S. gallons (17 L)

Recommended Coolant

Use a 50-50 mixture of

ethylene glycol and soft water.

Fuel Consumption

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 – install leak detectors accord- ingly.

‹1.9.1 CONVERSION TO LP GAS VAPOR

The generator is shipped from the factory configured for using natural gas as fuel. To convert the fuel system to LP gas, proceed as follows (Figure 1.3).

1.Remove end cap from the pressure reducer valve.

2.Turn the tension screw counterclockwise until all ten- sion is removed from the inner spring.

3.Install and tighten the end cap.

4.Invert the pressure reducer valve. In other words, turn it upside down (end cap facing downward).

5.Purge and leak test the entire fuel system according to gaseous fuel codes. NO LEAKS can appear at any point in the system.

Figure 1.3 – Conversion to LP Gas Vapor

Natural Gas

 

004373-3 & 004626-2

........................................720 cfh

LP Gas

 

004373-3 & 004626-2

..............................288 cfh/7.9gph

6 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 SystemsEngine Protective Devices SpecificationsMain Circuit Breaker Fuel Requirements Recommendations ‹ 1.9.1 Conversion to LP GAS Vapor‹ 1.12.1 AIR Fuel Ratio Controller Emissions Control SystemCoolant Standby Generator Installation Basic Standby Electric SystemNfpa Standards Other Published StandardsTransfer Switch Start Signal Connections ‹ 2.6.1 PRE-PACKAGED Type SwitchMethod Grounding the Generator‹ 2.7.1 Vented Batteries Battery InstallationPreparation Before START-UP ‹ 2.8.2 Transfer Switch ‹ 2.8.1 Prior to Initial START-UPUsing the AUTO/OFF/MANUAL Switch ‹ 3.2.3 Manual Position Sequence of Automatic OperationEngine Heater 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 RecommendationsSpark Plugs Battery Maintenance‹ 4.5.1 Battery Replacement Miscellaneous Maintenance Cooling SystemOverload Protection for DC Fuse‹ 4.11.2 Return to Service OUT of Service Procedure‹ 4.11.1 Removal from 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 PURCHASER’S/OWNER’S Warranty Responsibilities Your Warranty Rights and ObligationsMANUFACTURER’S Emission Control System Warranty Coverage 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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