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Generac Power Systems 004373-6, 004626-5 owner manual Emissions Control System, Coolant

Models: 004373-6 004626-5

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Section 1 — General Information

Guardian Liquid-cooled 40 kW Generator

1.10 ENGINE OIL RECOMMENDATIONS

The unit has been filled with 15W-40 engine oil at the factory. Use a high-quality detergent oil classified “For Service CC, SD, SE or SF.” Detergent oils keep the engine cleaner and reduce carbon deposits. Use oil hav- ing the following SAE viscosity rating, based on the ambient temperature range anticipated before the next oil change:

 

Temperature

Oil Grade(Recommended)

 

 

Above 80º F (27º C)

SAE 30W or 15W-40

 

 

32º to 80º F (-1º C to 27º C)

SAE 20W-20 or 15W-40

 

 

Below 32º F (0º C)

SAE 10W or 15W-40

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Any attempt to crank or start the engine before it ! has been properly serviced with the recommended

oil may result in an engine failure.

1.12 EMISSIONS CONTROL SYSTEM

(MODEL 0046265)

This model is equipped with an active exhaust emis- sions control system to comply with certain California air district regulations for natural gas emergency gener- ating sets, including the South Coast Air Quality Management District. DO NOT tamper with or disable any part of this system, including the exhaust catalyst, carburetor, oxygen sensor, air-fuel ratio controller, sole- noid valve and gas regulator. These items are not sub- ject to periodic maintenance or adjustment.

This model is of a size (greater than 50 brake horse- power) that may require a review by air permitting authorities prior to installation and operation. Consult the local air management district for details and spe- cific requirements.

1.11 COOLANT

Use a mixture of half low silicate, ethylene glycol base antifreeze and half deionized water. Use only deionized water and only low silicate antifreeze. If desired, add a high quality rust inhibitor to the recommended coolant mixture. When adding coolant, always add the recom- mended 50-50 mixture.

DANGER

Do not remove the radiator pressure cap while

!the engine is hot or serious burns from boiling liquid or steam could result.

Ethylene glycol base antifreeze is poisonous. Do

!not use mouth to siphon coolant from the radia- tor, recovery bottle or any container. Wash hands thoroughly after handling. Never store used antifreeze in an open container because animals are attracted to the smell and taste of antifreeze even though it is poisonous to them.

Do not use any chromate base rust inhibitor

!with ethylene glycol base antifreeze, or chromi- um hydroxide (“green slime”) will form and cause overheating. Engines that have been oper- ated with a chromate base rust inhibitor must be chemically cleaned before adding ethylene glycol base antifreeze. Using any high silicate antifreeze boosters or additives also will cause overheating. Generac also recommends that any soluble oil inhibitor NOT be used for this equip- ment.

Figure 1.4 - Emissions Control System

‹1.12.1 AIR FUEL RATIO CONTROLLER

The air fuel ratio controller is an advanced micro- processor designed to work with a three-way catalyst and a feedback (rich bias) carburetor to provide close- loop fuel management. Its digital adaptive control is able to compensate for variations in fuel mixtures and engine tunes. It is time based activated. (For example, it will activate after 45 seconds from receiving the power signal.) The part number for the air fuel ratio controller is 0D4221.

Principle of Operation: The oxygen sensor, installed on the exhaust pipe, between the engine and the cat- alytic muffler (closer to the engine), continuously moni- tors the exhaust gas composition. A feedback signal is sent from the oxygen sensor to the air fuel ratio con- troller, which controls the fuel system to maintain the optimal, stoichiometric air fuel ratio. The air fuel mix- ture to the engine is controlled by biasing the diaphragm in the fuel regulator using vacuum (from the carburetor). This vacuum signal is directed to the fuel regulator via the control valve. The air fuel ratio con- troller determines the amount of vacuum signal sent to the fuel regulator. The more vacuum sent to the regula- tor, the more restricted the fuel flow will be, therefore the leaner the air fuel mixture.

Generac® Power Systems, Inc. 7

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Generac Power Systems 004373-6, 004626-5 owner manual Emissions Control System, Coolant, ‹ 1.12.1 AIR Fuel Ratio Controller
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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.