Table of Contents

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

Introduction

Inside Front Cover

Read This Manual Thoroughly

IFC

Contents

..........................................................

IFC

Operation and Maintenance

............................

IFC

How to Obtain Service

IFC

Authorized Dealer Locator Number

IFC

Safety Rules

2

Standards Index

3

Section 1 – General Information

4

1.1

Unpacking/Inspection

4

1.2

Protection Systems

4

1.3

System Set LED

4

1.4

Your Generator

5

1.5

Specifications

6

 

1.5.1

Generator

6

 

1.5.2

Engine

6

1.6

Fuel Requirements and Recommendations....

7

1.7

Fuel Consumption

7

1.8

Reconfiguring the Fuel System

7

 

1.8.1 7 kW, 410cc Engine

7

 

1.8.2 12 kW and 15 kW, 990cc Engine

7

1.9

Location

8

 

1.9.1

Generator

8

 

1.9.2

Transfer Switch

8

1.10

Battery Installation

9

1.11

The Battery

9

Section 2 – Post Installation Start-up

 

 

 

and Adjustments

10

2.1

Before Initial Startup

10

2.2

Check Transfer Switch Operation

10

2.3

Electrical Checks

10

2.4

Generator Tests Under Load

11

2.5

Checking Automatic Operation

11

2.6Adjusting the Regulator (Natural Gas Only) ..12

2.7

Engine Governor Adjustment

12

 

2.7.1

7 kW Units

12

 

2.7.2 12 kW and 15 kW Units

13

 

2.7.3

Additional Corrosion Protection

13

2.8

Voltage Regulator Adjustment

13

Section 3 – Operation

14

3.1

Break-in Procedure

14

3.2

Using the Auto/Off/Manual Switch

14

 

3.2.1 “Auto” Position

14

 

3.2.2

“Off” Position

14

 

3.2.3

“Manual” Position

14

3.3

Automatic Transfer Operation

14

3.4

Sequence of Automatic Operation

15

3.5

Manual Transfer Operation

15

 

3.5.1

Transfer to Generator

 

 

 

Power Source

15

 

3.5.2 Transfer Back to Utility

 

 

 

Power Source

16

3.6

Setting the Exercise Timer

16

3.7

Protection Systems

16

 

3.7.1 Low Oil Pressure Switch

16

 

3.7.2

High Temperature Switch

16

 

3.7.3

Overcrank

16

 

3.7.4

Overspeed

17

Section 4 – Maintenance

17

4.1

Fuse

............................................................

17

4.2

Checking the Engine Oil Level

17

4.3

Changing the Engine Oil

18

 

4.3.1

Engine Oil Recommendations

18

 

4.3.2

Oil Change Procedure

18

4.4

Changing the Oil Filter

18

4.5

Changing the Engine Air Cleaner

18

 

4.5.1 7 kW, 12 kW and 15 kW

 

 

 

Generators

18

4.6

Spark Plug(s)

19

4.7

Battery Maintenance

19

4.8Adjusting GH-410/GT-990 Valve Clearance ..20

4.9

Cooling System

20

4.10

Attention After Submersion

21

4.11

Corrosion Protection

21

4.12

Out of Service Procedure

21

 

4.12.1 Removal From Service

21

 

4.12.2 Return to Service

21

4.13

Service Schedule

22

Section 5 – Troubleshooting

23

5.1

Troubleshooting Guide

23

Section 6

– Electrical Data

24

Section 7

– Exploded Views and

 

 

 

Parts Lists

32

Section 8

– Mounting Dimensions

53

Section 9

– Notes

54

Section 10 – Warranty

56

 

 

Generac® Power Systems, Inc.

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Generac Power Systems 04390-1 Introduction Inside Front Cover, General Information, Post Installation Start-up Adjustments
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04389-1, 04456-1, 04390-1 specifications

Generac Power Systems is synonymous with reliable and innovative power solutions for both residential and commercial applications. Among its diverse product lineup, the Generac 04390-1, 04456-1, and 04389-1 stand out due to their robust features, advanced technologies, and user-focused characteristics.

The Generac 04390-1 is a portable generator designed for versatility and efficiency. It is equipped with a powerful OHV engine that enables it to deliver up to 3500 running watts and 4375 starting watts, making it suitable for various applications, such as home backup during outages or powering tools on job sites. The generator features a built-in PowerRUSH technology, which provides a 40% more starting capacity than traditional models, allowing it to handle more demanding appliances and tools simultaneously. Additionally, its lightweight and compact design enhance portability, complemented by a sturdy handle and flat-free wheels.

Moving on to the Generac 04456-1, this model offers a greater output with 7500 running watts and 9400 starting watts. Ideal for larger homes or work environments, it is powered by a heavy-duty, 420cc engine and designed for optimal performance. The unit incorporates an electric start feature for easy operation and includes a low-oil shutdown system that protects the engine from damage, providing peace of mind to users. The reinforced roll-cage design ensures durability, while its quiet operation keeps noise levels to a minimum, making it suitable for more noise-sensitive environments.

Lastly, the Generac 04389-1 generator is particularly characterized by its dual-fuel capability, allowing users to run it on either gasoline or propane. This flexibility ensures seamless operation in various situations, with 5500 running watts on gasoline and 4950 running watts on propane. The model’s advanced engineering includes an easy-to-read fuel gauge, ensuring that users can monitor fuel levels without hassle. This generator is also equipped with a heavy-duty, full-wrap steel frame for resistance against impacts and wear, making it perfect for outdoor use.

Collectively, the Generac 04390-1, 04456-1, and 04389-1 models embody a commitment to quality and innovation. With their powerful engines, enhanced technologies, and user-friendly features, these generators provide peace of mind through reliable power solutions, catering to a multitude of needs for both residential and commercial users alike. Whether for emergency backup or regular use, Generac’s offerings ensure that power is always on hand when it’s needed the most.
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