Generac Power Systems 004626-5, 004373-6 owner manual Fuel Requirements Recommendations

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Section 1 — General Information

Guardian Liquid-cooled 40 kW Generator

‹1.8.2 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 the fuel supplier for the Btu content of the 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.

‹ 1.8.3 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

 

 

deionized water.

Fuel Consumption

 

 

Natural Gas

720 cfh

LP Gas

288 cfh/7.9gph

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

6 Generac® Power Systems, Inc.

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Contents Liquid-cooled, Prepackaged Standby Generators Models Introduction Authorized Dealer LocationInstallation Diagram General Hazards Electrical Hazards Prepackaged Transfer Switch UNPACKING/INSPECTIONGenerator Generator AC Connection SystemsEngine Protective Devices SpecificationsMain Circuit Breaker ‹ 1.9.1 Conversion to LP GAS Vapor Fuel Requirements Recommendations‹ 1.8.2 Generator and Load Compatibility ‹ 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 GeneratorBattery Installation ‹ 2.7.1 Vented BatteriesPreparation Before START-UP Using 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 RecommendationsBattery Maintenance ‹ 4.5.1 Battery ReplacementSpark Plugs Cooling SystemMiscellaneous Maintenance Overload Protection forDC Fuse Engine Coolant‹ 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 CorrectionInstallation Diagram TS1 Generator D4992-A Guardian Liquid- Panel 4.3L Drawing No Section Wiring Diagram Control Panel Model No Drawing No KW Generators No D6975 EC1 ACT 12 19 11 3529 QTY Description ONE Assembly M6 Hinge Panel Face Panel BTM & Back Control Exploded Views and Parts Lists CHASSIS, Universal Exploded Views and Parts Lists QTY To Engine Flywheel Washer Lock M12 Exploded Views and Parts Lists Engine 4.3L GM Exploded Views and Parts Lists Mount Engine R & L KIT Radiator Copper Brass DIA. Clamp Assembly 2 Compartment To Engine Front NUT Wing 1/4-20 Nylk To Stepper Motor To Valve Cover To Intake Manifold Support Solenoid NAT GAS Attach to FAN Scroll Elbow 90D 3/4NPT Exploded Views and Parts Lists Muffler Catalyst 4.3L Assembly Motor Stepper To Thermostat Housing Guardian Liquid-cooled 40 kW Generators 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

004373-6, 004626-5 specifications

Generac Power Systems has established itself as a leader in the field of backup and portable power solutions, and their models 004626-5 and 004373-6 are prime examples of their dedication to innovation and reliability. These models are designed to cater to a variety of power needs, making them essential assets for homeowners and businesses alike.

The 004626-5 is a robust home standby generator, renowned for its powerful performance and automatic transfer switch capabilities. This model features Generac's G-Force engine, which is specifically engineered for high performance and longevity, ensuring that it can handle the demands of powering a home during outages. It boasts a multi-language LCD display that provides real-time system status updates, allowing users to monitor performance with ease. Additionally, the 004626-5 is equipped with an integrated wi-fi system, enabling remote monitoring through the Mobile Link app. This feature gives users the convenience of checking their generator's status from anywhere, ensuring peace of mind.

On the other hand, the 004373-6 is a portable generator designed for versatility and convenience. This model is lightweight and easily transportable, making it ideal for outdoor activities, job sites, or emergency power supply during outages. Powered by a reliable OHV engine, the 004373-6 delivers impressive power output while maintaining fuel efficiency. Its ergonomic design includes a transport handle and never-flat wheels, allowing for easy maneuverability. The model also features Generac’s PowerRush technology, which provides over 50% more starting capacity, making it capable of handling larger appliances with ease.

Both models are designed with safety features in mind. The 004626-5 comes with a durable weather-resistant enclosure, protecting it from the elements, while the 004373-6 includes a low-oil shutdown feature to prevent engine damage.

In summary, Generac Power Systems continues to set the benchmark for reliability and innovation in power solutions with models 004626-5 and 004373-6. With their advanced technologies, user-friendly features, and unparalleled performance, these generators are engineered to provide power when it’s needed most, ensuring a seamless transition during outages and enhancing convenience for users across various settings.
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