Generac Power Systems 04389-3, 04456-3, 04390-3 Location, ‹ 1.9.2 12KW and 15KW, V-TWIN Engines

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Section 1 — General Information

Air-cooled 7 kW, 12 kW and 15 kW Generators

8.Refit the brass hose barb fitting to outlet port #1 and the square headed steel pipe plug to outlet port #2.

9.Reverse procedure steps 1-5 to reinstall demand regulator.

10.Take the plastic plug supplied in the poly-bag with the generator and press it into the 3/4” hole on the bottom of the air cleaner base (Figure 4.6).

11.Reverse the procedure to convert back to natural gas.

‹1.9.2 12KW AND 15KW, V-TWIN ENGINES

To reconfigure the fuel system from NG to LP, follow these steps:

NOTE:

13.To adjust the system to run on LP fuel, turn BOTH adjuster screws 1/2 TURN CLOCKWISE. The system should now be set for maximum power and best perfomance. DO NOT, UNDER ANY CIRCUMSTANCES, REMOVE THE SET PINS FROM THE REGULATOR HOUSING. THIS WILL VOID THE WARRANTY.

14.It may be necessary to make minor adjustments to the preset adjustment screw settings to achieve maximum power, particularly at higher altitudes. If experiencing problems with the unit producing maximum power, follow the procedure in Section 2.6 (Adjusting the Fuel Regulator).

Figure 1.4 - Demand Regulator

The primary regulator for the propane supply is NOT INCLUDED with the generator. A fuel pres- sure of 10 to 12 inches of water column (0.36 to

0.43psi) to the fuel inlet of the generator MUST BE SUPPLIED.

1.

Turn off the gas supply. (if connected)

2.

Open the roof and remove the door.

3.

Remove the battery. (if installed)

4.

Remove the engine air in baffle located on the left-

 

hand side of the battery compartment. Two M6

 

screws are located on top of the baffle and two

IDLE CIRCUIT PORT

 

OUTLET PORTS

 

FUEL HOSE

 

BRASS HOSE

 

FITTING

U

BRASS HOSE

T

FITTING

1

TAP

 

1/8 NPT

 

ADJUSTER

 

SCREWS

SMALL

FUEL JET

REGULATOR HOUSING PORT

 

M6 screws are located on the inside of the baffle

 

towards the back.

5.

Remove the small hose clamp and hose from the

 

fuel regulator. It may be necessary to pry the hose

 

off of the brass fitting using a screwdriver to gen-

 

tly lift up the hose edge.

6.

Remove the small brass hose fitting from the

 

regulator casting.

7.

Place the small fuel jet, thread side first, into the

 

threaded hole originally occupied by the brass

 

hose fitting (Figure 1.4).

8.

Using a short No. 2 Phillips screw driver, thread

 

the small fuel jet into the regulator casting. Do

 

not over tighten.

9.

Apply thread sealant to the threads of the hose

 

fitting and replace it into the regulator body.

10.

Re-attach the small hose and hose clamp and

 

tighten as necessary.

11.

Replace the engine air in baffle using the four M6

 

screws.

12.

Identify both brass adjustment screws on the

 

regulator.

NOTE:

One adjustment screw can be accessed from the front of the unit and the second can be accessed from the back of the unit enclosure by removing the plastic hole plug. The screw can be turned with a long flat blade screwdriver.

8

1.10 LOCATION

‹1.10.1 GENERATOR

Install the generator set, in its protective enclosure, outdoors, where adequate cooling and ventilating air is always available. Consider these factors:

•Install the unit where air inlet and outlet open- ings will not become obstructed by leaves, grass, snow, etc. If prevailing winds will cause blowing or drifting, consider using a windbreak to protect the unit.

•Install the generator on high ground where water levels will not rise and endanger it.

•Allow sufficient room on all sides of the generator for maintenance and servicing. A good rule is to allow three feet of space on all sides.

•Where strong prevailing winds blow from one direction, face the generator air inlet openings to the prevailing winds.

•Install the generator as close as possible to the fuel supply, to reduce the length of piping.

•Install the generator as close as possible to the transfer switch. HOWEVER, REMEMBER THAT LAWS OR CODES MAY REGULATE THE DISTANCE.

The genset must be installed on a level surface. The base frame must be level within two (2) inches all around.

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Contents US Listed Introduction Authorized Dealer LocationTroubleshooting Post Installation Start-up AdjustmentsMaintenance Introduction Inside Front Cover Warning   Electrical Hazards  ‹ Standards IndexProtection Systems UNPACKING/INSPECTIONBreaker for Bedrooms Generator Gfci‹ 1.5.1 Generator Specifications‹ 1.5.2 Engine Fuel Requirements Recommendations Reconfiguring the Fuel SystemSystem SET LED Fuel Consumption‹ 1.9.2 12KW and 15KW, V-TWIN Engines Location‹ 1.10.1 Generator ‹ 1.10.2 Transfer Switch Battery InstallationBattery 10.2.1 7 kW, 12 kW and 15 kW UnitsBefore Initial START-UP Check Transfer Switch OperationElectrical Checks Generator Tests Under Load Checking Automatic OperationAdjusting the Regulator Natural GAS only Adjustment Screw‹ 2.7.2 12 KW and 15 KW Units Engine Governor Adjustment‹ 2.7.1 7 KW Units BREAK-IN Procedure Voltage Regulator Adjustment‹ 3.2.1 Auto Position Sequence of Automatic Operation ‹ 3.3.1 12 VDC Accessory OutletAutomatic Transfer Operation ‹ 3.2.2 OFF Position‹ 3.5.2 Transfer Back to Utility Power Source Manual Transfer Operation‹ 3.7.1 LOW OIL Pressure Switch Setting the Exercise Timer‹ 3.7.2 High Temperature Switch ‹ 3.7.3 OvercrankChecking the Engine OIL Level Fuses‹ 3.7.4 Overspeed Changing the OIL Filter ‹ 4.3.2 OIL Change ProcedureChanging the Engine OIL ‹ 4.3.1 Engine OIL RecommendationsBattery Maintenance Spark PlugsValve Clearance Cooling System‹ 4.12.2 Return to Service OUT of Service Procedure‹ 4.12.1 Removal from Service Corrosion ProtectionService Schedule Be performed by the nearest Authorized DealerTroubleshooting Guide Problem Cause CorrectionAir-cooled 7 kW, 12 kW and 15 kW Generators Air-cooled 7 kW, 12 kW and 15 kW Generators Air-cooled 7 kW, 12 kW and 15 kW Generators Electrical Data Customer Connection Battery 1VA Engine Wiring Control Panel BOX Electronic Voltage Regulator Utility Electrical Data Electrical Data Electrical Data Electrical Data ATS N1A N2A Exploded Views and Parts Lists Part NO. QTY. Description Exploded Views and Parts Lists Part NO. QTY Description Exploded Views and Parts Lists QTY Description Exploded Views and Parts Lists COVER, 12 Circuit GTS Load Center 1310 Sleeve 124 125 139 136 135 123 120 137 143 133 134 132 KNOB, AIR Cleaner Exploded Views and Parts Lists QTY 32 31 Stator 12KW Exploded Views and Parts Lists PIN, Piston D20 Exploded Views and Parts Lists SCREW, Taptite M6-1.0X8 Yellow Chrome 7KW Mounting Dimensions 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

04389-3, 04456-3, 04390-3 specifications

Generac Power Systems has established itself as a leading name in power generation equipment, and models 04389-3, 04456-3, and 04390-3 exemplify the company’s commitment to reliability and technology. These models are particularly popular among homeowners and businesses that need dependable backup power solutions.

The Generac 04389-3 is a 22 kW standby generator designed to provide seamless power during outages. It boasts a powerful 999cc engine that can handle heavy loads, making it suitable for larger homes or commercial settings. The generator features Generac’s patented True Power Technology, which ensures clean and stable power delivery, making it safe for sensitive electronics. It also comes equipped with an innovative shutdown system that prevents damage during low oil conditions and features a five-year limited warranty for added peace of mind.

Similarly, the 04456-3 model also serves as a robust standby generator, offering 24 kW of power output. This model highlights an advanced alternator that provides a reliable source of energy for running essential appliances like refrigerators, air conditioners, and heating systems. The 04456-3 includes an automatic exercise mode, allowing it to run tests periodically to ensure it’s always ready to operate when needed. Additionally, it utilizes a user-friendly digital controller that simplifies monitoring and operational management.

The Generac 04390-3 model offers a slightly lower output at 20 kW but retains high efficiency and reliability. Like its counterparts, it features an innovative design that operates quietly while delivering consistent power. This model is particularly aimed at residential users who require dependable backup solutions without the noise commonly associated with generators. It incorporates Generac’s Smart Management modules, enabling users to manage power loads effectively and avoid overloading the system.

All three models benefit from Generac’s Mobile Link technology, which enables remote monitoring via mobile devices. This feature allows users to check the status of their generators, including maintenance alerts and operational history, providing a convenient way to manage energy needs. In summary, Generac models 04389-3, 04456-3, and 04390-3 offer cutting-edge features, dependable technology, and robust capabilities, making them an ideal choice for anyone seeking reliable backup power solutions.
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