E 2009 Lennox Industries Inc.

Dallas, Texas 75379-9900

This manual provides operation and maintenance

instructions for models RGEN12 and RGEN17/18

generator sets.

Generator sets are approved for use in stationary

standby applications in locations served by a reliable

utility power source. Have a Lennox dealer who is

approved to sell and install Lennox generator sets

(hereinafter referred to as a Lennox dealer) install the

generator set. Refer to XP-6514, Installation

Instructions, for installation instructions.

Information in this publication represents data available

at the time of print. The manufacturer reserves the right

to change this publication and the products represented

without notice and without any obligation or liability

whatsoever.

Read this manual and carefully follow all procedures

and safety precautions to ensure proper equipment

operation and to avoid bodily injury. Read and follow the

Safety Precautions and Instructions section. Keep this

manual with the equipment for future reference.

The equipment service requirements are very important

to safe and efficient operation. Inspect the parts often

and perform required service at the prescribed intervals.

Obtain service from a Lennox dealer to keep equipment

in top condition.

RETAIN THESE INSTRUCTIONS

FOR FUTURE REFERENCE

Shipping and Packing List

1 -- Generator Set

Check equipment for shipping damage. If you find any

damage, immediately contact the last carrier.

506088-01

OPERATION

MANUAL

RGEN12, RGEN17/18

RESIDENTIAL GENERATOR SET

XP-6515 4/09a

Table of Contents

Product Identification Information 2...............

Safety Precautions and Instructions 3.............

Introduction 7...................................

Section 1 Features 9.............................

1.1 Specifications 9.............................

1.2 Generator 9.................................

1.3 Engine 9...................................

1.4 Controller 9.................................

1.5 Generator Set Components 10.................

Section 2 Operation 12............................

2.1 Prestart Checklist 12..........................

2.2 Exercising Generator Set 12...................

2.3 Controls and Indicators 12.....................

2.4 Controller Power 13...........................

2.5 Generator Set Operation 14....................

2.6 Faults 14....................................

2.7 Battery Charger 17...........................

Section 3 Scheduled Maintenance, RGEN12 18......

3.1 Routine Maintenance 18.......................

3.2 Service Schedule, RGEN12 19.................

3.3 Lubrication System 20.........................

3.4 Spark Plugs 21...............................

3.5 Air Cleaner Element and Precleaner 21..........

3.6 Cooling System 22............................

3.7 Exhaust System 23...........................

3.8 Battery 23...................................

3.9 Battery Charger 24...........................

3.10 Circuit Protection 24..........................

3.11 Storage Procedure 25.........................

Section 4 Scheduled Maintenance, RGEN17/18 26...

4.1 Routine Maintenance 26.......................

4.2 Service Schedule, RGEN17/18 27..............

4.3 Lubrication System 28.........................

4.4 Spark Plugs 29...............................

4.5 Air Cleaner Service 30........................

4.6 Cooling System 30............................

4.7 Exhaust System 31...........................

4.8 Battery 31...................................

4.9 Battery Charger 32...........................

4.10 Circuit Protection 32..........................

4.11 Storage Procedure 33.........................

Section 5 Troubleshooting 34......................

5.1 Introduction 34...............................

5.2 Controller Troubleshooting 34..................

5.3 Generator Set Troubleshooting 35..............

5.4 Battery Charger Troubleshooting 36.............

Lennox RGEN12

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