Generac Power Systems G0065510 User manual

Owner’s Manual
60 Hz Air-Cooled Generators
9 kW to 22 kW
SAVE THIS MANUAL FOR FUTURE REFERENCE
®
Para español, visita: http://www.generac.com/service-support/product-support-lookup
Pour le français, visiter : http://www.generac.com/service-support/product-support-lookup
Register your Generac product at:
WWW.GENERAC.COM
1-888-GENERAC
(888-436-3722)
(000209b)
WARNING
Loss of life. This product is not intended to
be used in a critical life support application.
Failure to adhere to this warning could result
in death or serious injury.

ii Owner’s Manual for 60 Hz Air-Cooled Generators
Use this page to record important information about your generator set.
Record the information found on your unit data label on this
page. See General Information for the location of the unit
data label. The unit has a label plate affixed to the inside
partition, to the left of the control panel console as shown in
Figure 2-1 or Figure 2-2. See Operation for directions on
how to open the top lid and remove the front panel.
When contacting an Independent Authorized Service Dealer
(IASD) about parts and service, always supply the complete
model and serial numbers of the unit.
Operation and Maintenance: Proper maintenance and care
of the generator ensures a minimum number of problems
and keeps operating expenses at a minimum. It is the
operator’s responsibility to perform all safety checks, to
verify all maintenance for safe operation is performed
promptly, and to have the equipment checked periodically by
an IASD. Normal maintenance, service, and replacement of
parts are the responsibility of the owner/operator and are not
considered defects in materials or workmanship within the
terms of the warranty. Individual operating habits and usage
may contribute to the need for additional maintenance or
service.
When the generator requires servicing or repairs, Generac
recommends contacting an Independent Authorized Service
Dealer for assistance. Authorized service technicians are
factory–trained and are capable of handling all service
needs. To locate the nearest Independent Authorized
Service Dealer, please visit the dealer locator at:
www.generac.com/Service/DealerLocator/.
Model:
Serial:
Production Date:
Volts:
LPV Amps:
NG Amps:
Hz:
Phase:
Controller P/N:
STA MAC ID:
SSID:
(000393)
WARNING
Operating, servicing and maintaining this
equipment can expose you to chemicals
including engine exhaust, carbon monoxide,
phthalates, and lead, which are known to the
State of California to cause cancer and birth
defects or other reproductive harm. To
minimize exposure, avoid breathing exhaust,
do not idle the engine except as necessary,
service your equipment in a well-ventilated
area and wear gloves or wash your hands
frequently when servicing your equipment.
For more information go to
www.P65Warnings.ca.gov.

Owner’s Manual for 60 Hz Air-Cooled Generators iii
Section 1: Safety Information
Introduction ..........................................................1
Read This Manual Thoroughly ....................................1
Safety Rules .........................................................1
How to Obtain Service .................................................2
General Hazards ..................................................2
Exhaust Hazards .........................................................3
Electrical Hazards .......................................................3
Fire Hazards ................................................................4
Explosion Hazards ......................................................4
Battery Hazards ...........................................................5
Section 2: General Information
The Generator ......................................................7
Data Decals ..........................................................9
Specifications ....................................................10
Generator ..................................................................10
Engine .......................................................................10
Protection Systems ...........................................11
Emission Information ........................................11
Fuel Requirements ............................................11
Battery Requirements .......................................11
Battery Charger ..................................................11
Engine Oil Requirements ..................................11
Activating the Generator ...................................12
Wi-Fi Module ......................................................12
Replacement Parts ............................................12
Accessories ........................................................12
Section 3: Operation
Site Prep Verification ........................................ 13
Generator Enclosure ......................................... 13
Opening the Lid .........................................................13
Removing the Front Access Panel ............................13
Intake Side Panel Removal .......................................14
Main Line Circuit Breaker (Generator Disconnect) ....14
LED Indicator Lights ..................................................14
Auxiliary Shutdown Switch .............................. 15
Control Panel Interface ..................................... 15
Using the AUTO/OFF/MANUAL Interface ........ 15
Interface Menu Displays ................................... 16
LCD Panel .................................................................16
Menu System Navigation ..........................................18
Setting the Exercise Timer ............................... 20
Battery Charger ................................................. 20
Manual Transfer Operation ............................... 21
Transfer to Generator Power Source ........................21
Transfer to Utility Power Source ................................22
Automatic Transfer Operation ......................... 22
Automatic Sequence of Operation .................. 22
Utility Failure ..............................................................22
Cranking ....................................................................22
Cold Smart Start ........................................................23
Load Transfer ............................................................23
Shutting Generator Down While Under Load
Or During A Utility Outage ................................ 23
Table of Contents

Table of Contents
iv Owner’s Manual for 60 Hz Air-Cooled Generators
Section 4: Maintenance
Maintenance .......................................................25
Preparing for Maintenance ...............................25
Performing Scheduled Maintenance ................25
Service Schedule ...............................................26
Maintenance Log ...................................................... 26
Checking Engine Oil Level ................................27
Engine Oil Requirements .......................................... 27
Changing the Oil and Oil Filter .........................28
Servicing the Air Cleaner ..................................28
Spark Plug(s) ......................................................29
Valve Clearance Adjustment ............................29
Check Valve Clearance ............................................ 29
Adjust Valve Clearance ............................................. 30
Battery Maintenance ..........................................31
Cleaning the Sediment Trap .............................32
Post Maintenance Checks ................................32
Perform Leak Test .............................................33
Attention After Submersion ..............................33
Corrosion Protection .........................................33
Remove From, and Return To Service
Procedure ...........................................................34
Remove From Service .............................................. 34
Return to Service ...................................................... 34
Section 5: Troubleshooting / Quick
Reference Guide
Generator Troubleshooting ..............................35
Quick Reference Guide .....................................37

Safety Information
Owner’s Manual for 60 Hz Air-Cooled Generators 1
Section 1: Safety Information
Introduction
Thank you for purchasing this compact, high
performance, air-cooled, engine-driven generator. It is
designed to automatically supply electrical power to
operate critical loads during a utility power failure.
This unit is factory installed in an all-weather, metal
enclosure intended exclusively for outdoor installation.
This generator will operate using either vapor withdrawn
liquid propane (LP) or natural gas (NG).
NOTE: This generator is suitable for supplying typical
residential loads such as induction motors (sump pumps,
refrigerators, air conditioners, furnaces, etc.), electronic
components (computer, monitor, TV, etc.), lighting loads,
and microwaves, when sized properly. This unit is
equipped with a Wi-Fi® module, which enables the
generator owner to monitor generator status from
anywhere he or she has Internet access.
NOTE: Wi-Fi® is a registered trademark of Wi-Fi
Alliance®.
The information in this manual is accurate based on
products produced at the time of publication. The
manufacturer reserves the right to make technical
updates, corrections, and product revisions at any time
without notice.
Read This Manual Thoroughly
Study this manual carefully before installing, operating, or
servicing this equipment. Become familiar with this
owner’s manual and with the unit. The generator can
operate safely, efficiently, and reliably only if it is properly
installed, operated, and maintained. Many accidents are
caused by failing to follow simple and fundamental rules
or precautions.
If any section of this manual is not understood, contact
the nearest Independent Authorized Service Dealer
(IASD) for starting, operating, and servicing procedures.
This manual must be used in conjunction with the
appropriate installation manual and Wi-Fi manual.
SAVE THESE INSTRUCTIONS: The manufacturer
suggests this manual and the rules for safe operation be
copied and posted near the unit installation site. Safety
should be stressed to all operators and potential
operators of this equipment.
Safety Rules
The manufacturer cannot anticipate every possible cir-
cumstance that might involve a hazard. The alerts in this
manual, and on tags and decals affixed to the unit, are
not all inclusive. If using a procedure, work method, or
operating technique that the manufacturer does not spe-
cifically recommend, verify that it is safe for others and
does not render the equipment unsafe.
Throughout this publication, and on tags and decals
affixed to the unit, DANGER, WARNING, CAUTION, and
NOTE blocks are used to alert personnel to special
instructions about a particular operation that may be
hazardous if performed incorrectly or carelessly. Observe
them carefully. Alert definitions are as follows:
NOTE: Notes contain additional information important to
a procedure and will be found within the regular text of
this manual.
These safety alerts cannot eliminate the hazards that
they indicate. Common sense and strict compliance with
the special instructions while performing the action or
service are essential to preventing accidents.
The operator is responsible for proper and safe use of
the equipment. The manufacturer strongly recommends
that if the operator is also the owner, to read the owner’s
manual and thoroughly understand all instructions before
using this equipment. The manufacturer also strongly
recommends instructing other users to properly start and
operate the unit. This prepares them if they need to
operate the equipment in an emergency.
(000100a)
WARNING
Consult Manual. Read and understand manual
completely before using product. Failure to
completely understand manual and product
could result in death or serious injury.
(000001)
DANGER
Indicates a hazardous situation which, if not avoided,
will result in death or serious injury.
(000002)
WARNING
Indicates a hazardous situation which, if not avoided,
could result in death or serious injury.
(000003)
CAUTION
Indicates a hazardous situation which, if not avoided,
could result in minor or moderate injury.

Safety Information
2Owner’s Manual for 60 Hz Air-Cooled Generators
How to Obtain Service
Contact an IASD for assistance when the generator requires
servicing or repairs. Service technicians are factory-trained
and are capable of handling all service needs. Please visit
the dealer locator at:
www.generac.com/Service/
DealerLocator/
to locate the nearest IASD.
When contacting a dealer about parts and service,
always supply the complete model and serial numbers of
the unit as given on its data plate (decal), which is
located on the generator. See Figure 2-1 or Figure 2-2
for decal location. Record the model and serial numbers
in the spaces provided on the inside front cover of this
manual.
General Hazards
(000190)
DANGER
Loss of life. Property damage. Installation must always
comply with applicable codes, standards, laws and
regulations. Failure to do so will result in death
or serious injury.
Automatic start-up. Disconnect utility power and
render unit inoperable before working on unit.
Failure to do so will result in death or serious injury.
(000191)
DANGER
(000209b)
WARNING
Loss of life. This product is not intended to
be used in a critical life support application.
Failure to adhere to this warning could result
in death or serious injury.
WARNING
Equipment damage. This unit is not intended for use as a
prime power source. It is intended for use as an intermediate
power supply in the event of temporary power outage only.
Doing so could result in death, serious injury, and
equipment damage. (000247a)
(000130)
WARNING
Accidental Start-up. Disconnect the negative battery
cable, then the positive battery cable when working
on unit. Failure to do so could result in death
or serious injury.
(000182a)
WARNING
Equipment damage. Only qualified service personnel may
install, operate, and maintain this equipment. Failure to follow
proper installation requirements could result in death, serious
injury, and equipment or property damage.
(000187)
WARNING
Electrocution. Potentially lethal voltages are generated
by this equipment. Render the equipment safe before
attempting repairs or maintenance. Failure to do so
could result in death or serious injury.
(000155a)
WARNING
Electric shock. Only a trained and licensed electrician
should perform wiring and connections to unit. Failure
to follow proper installation requirements could result in
death, serious injury, and equipment or property damage.
(000115)
WARNING
Moving Parts. Do not wear jewelry when
starting or operating this product. Wearing
jewelry while starting or operating this product
could result in death or serious injury.
(000111)
WARNING
Moving Parts. Keep clothing, hair, and
appendages away from moving parts. Failure
to do so could result in death or serious injury.
(000108)
WARNING
Hot Surfaces. When operating machine, do not
touch hot surfaces. Keep machine away from
combustibles during use. Hot surfaces could
result in severe burns or fire.
(000146)
WARNING
Equipment and property damage. Do not alter
construction of, installation, or block ventilation for
generator. Failure to do so could result in unsafe
operation or damage to the generator.
WARNING
Risk of injury. Do not operate or service this machine
if not fully alert. Fatigue can impair the ability to service
this equipment and could result in death or serious
injury. (000215)

Safety Information
Owner’s Manual for 60 Hz Air-Cooled Generators 3
• Inspect the generator regularly, and contact the
nearest IASD for parts needing repair or replacement.
Exhaust Hazards
•The generator must be installed and operated
outdoors only.
Electrical Hazards
WARNING
Environmental Hazard. Always recycle batteries at an
official recycling center in accordance with all local
laws and regulations. Failure to do so could result in
environmental damage, death or serious injury.
(000228)
WARNING
Injury and equipment damage. Do not use generator
as a step. Doing so could result in falling, damaged
parts, unsafe equipment operation, and could result
in death or serious injury. (000216)
Asphyxiation. Running engines produce
carbon monoxide, a colorless, odorless,
poisonous gas. Carbon monoxide, if not
avoided, will result in death or serious injury.
(000103)
DANGER
(000178a)
Asphyxiation. Always use a battery operated carbon
monoxide alarm indoors and installed according to
the manufacturer’s instructions. Failure to do so
could result in death or serious injury.
WARNING
(000146)
WARNING
Equipment and property damage. Do not alter
construction of, installation, or block ventilation for
generator. Failure to do so could result in unsafe
operation or damage to the generator.
(000144)
DANGER
Electrocution. Contact with bare wires,
terminals, and connections while generator
is running will result in death or serious injury.
(000150)
DANGER
Electrocution. Never connect this unit to the electrical
system of any building unless a licensed electrician
has installed an approved transfer switch. Failure to
do so will result in death or serious injury.
(000237)
DANGER
Electrical backfeed. Use only approved switchgear to
isolate generator from the normal power source.
Failure to do so will result in death, serious injury,
and equipment damage.
(000152)
DANGER
Electrocution. Verify electrical system is
properly grounded before applying power.
Failure to do so will result in death or serious
injury.
(000188)
DANGER
Electrocution. Do not wear jewelry while
working on this equipment. Doing so will
result in death or serious injury.
(000104)
DANGER
Electrocution. Water contact with a power
source, if not avoided, will result in death
or serious injury.
(000145)
DANGER
Electrocution. In the event of electrical accident,
immediately shut power OFF. Use non-conductive
implements to free victim from live conductor. Apply
first aid and get medical help. Failure to do so will
result in death or serious injury.

Safety Information
4Owner’s Manual for 60 Hz Air-Cooled Generators
Fire Hazards
•Comply with regulations the Occupational Safety
and Health Administration (OSHA) has
established. Also verify the generator is installed in
accordance with the manufacturer’s instructions
and recommendations. Following proper
installation, do nothing that might alter a safe
installation and render the unit in noncompliance
with the aforementioned codes, standards, laws,
and regulations.
Explosion Hazards
WARNING
Fire hazard. Do not obstruct cooling and
ventilating airflow around the generator. Inadequate
ventilation could result in fire hazard, possible
equipment damage, death or serious injury. (000217)
WARNING
Fire and explosion. Installation must comply
with all local, state, and national electrical
(000218)
building codes. Noncompliance could result in unsafe
operation, equipment damage, death or serious injury.
WARNING
Fire hazard. Use only fully-charged fire
(000219)
extinguishers rated “ABC” by the NFPA. Discharged or
improperly rated fire extinguishers will not extinguish
electrical fires in automatic standby generators.
(000100a)
WARNING
Consult Manual. Read and understand manual
completely before using product. Failure to
completely understand manual and product
could result in death or serious injury.
WARNING
to use required safety equipment could result
in death or serious injury. (000257)
Electrocution. Refer to local codes and
standards for safety equipment required when
working with a live electrical system. Failure
(000147)
WARNING
Risk of Fire. Unit must be positioned in a
manner that prevents combustible material
accumulation underneath. Failure to do so
could result in death or serious injury.
(000192)
DANGER
Explosion and fire. Fuel and vapors are extremely
flammable and explosive. No leakage of fuel is
permitted. Keep fire and spark away. Failure to do
so will result in death or serious injury.
(000151a)
DANGER
Explosion and fire. Connection of fuel source must be
completed by a qualified professional technician or
contractor. Incorrect installation of this unit will result in
death, serious injury, and property and equipment damage.
(000174)
DANGER
Risk of fire. Allow fuel spills to completely dry
before starting engine. Failure to do so will
result in death or serious injury.
(000110)
WARNING
Risk of Fire. Hot surfaces could ignite
combustibles, resulting in fire. Fire could
result in death or serious injury.

Safety Information
Owner’s Manual for 60 Hz Air-Cooled Generators 5
Battery Hazards
Always recycle batteries in accordance with local laws
and regulations. Contact your local solid waste collection
site or recycling facility to obtain information on local
recycling processes. For more information on battery
recycling, visit the Battery Council International website
at: http://batterycouncil.org
(000188)
DANGER
Electrocution. Do not wear jewelry while
working on this equipment. Doing so will
result in death or serious injury.
(000162)
WARNING
Explosion. Do not dispose of batteries in a fire. Batteries
are explosive. Electrolyte solution can cause burns and
blindness. If electrolyte contacts skin or eyes, flush with water
and seek immediate medical attention.
(000137a)
WARNING
Explosion. Batteries emit explosive gases while charging.
Keep fire and spark away. Wear protective gear when
working with batteries. Failure to do so could result in
death or serious injury.
(000164)
WARNING
Electrical shock. Disconnect battery ground
terminal before working on battery or battery
wires. Failure to do so could result in death
or serious injury.
(000138a)
WARNING
(000163a)
WARNING
Risk of burn. Do not open or mutilate batteries.
Batteries contain electrolyte solution which can
cause burns and blindness. If electrolyte contacts
skin or eyes, flush with water and seek immediate
medical attention.
WARNING
Environmental Hazard. Always recycle batteries at an
official recycling center in accordance with all local
laws and regulations. Failure to do so could result in
environmental damage, death or serious injury.
(000228)

Safety Information
6Owner’s Manual for 60 Hz Air-Cooled Generators
This page intentionally left blank.

General Information
Owner’s Manual for 60 Hz Air-Cooled Generators 7
Section 2: General Information
The Generator
Figure 2-1. 9kW—Components and Control Locations
A. Lock with Cover F. Oil Fill Cap/Dipstick K. Oil Drain Hose O. Fuel Inlet
B. Main Line Circuit
Breaker (Generator
Disconnect)
G. Status LED Indicators L. Composite Base P. Wi-Fi Module
C. Control Panel H. Airbox with Air Cleaner M. Sediment Trap Q. Data Decal Location
D. Battery Compartment
(Battery not supplied)
J. Oil Filter N. Fuel Regulator R. Auxiliary Shutdown
Switch
E. Exhaust Enclosure
F
001818
M
N
O
P
A
Q
D
C
BE
L
K
J
H
A
G
R

General Information
8Owner’s Manual for 60 Hz Air-Cooled Generators
Figure 2-2. 11kW–22kW—Components and Control Locations
A. Lock with Cover F. Exhaust Enclosure L. Composite Base Q. Wi-Fi Module
B. Main Line Circuit
Breaker (Generator
Disconnect)
G. Status LED Indicators M. Oil Dipstick R. Data Decal Location
C. Airbox with Air Cleaner H. Oil Drain N. Sediment Trap S. Auxiliary Shutdown
Switch (all models)
D. Control Panel J. Oil Fill Cap O. Fuel Regulator T. Auxiliary Shutdown
Switch (16kW–22kW)
E. Battery Compartment
(Battery not supplied)
K. Oil Filter P. Fuel Inlet
001786
N
M
O
P
Q
G
K
J
F
L
R
E
A
D
C
B
A
H
T
S

General Information
Owner’s Manual for 60 Hz Air-Cooled Generators 9
Data Decals
Two decals on the generator provide information about
the unit itself and required fuel inlet pressure for proper
operation.
Model Data Decal
Includes important information about the
unit including:
• model number
• serial number
• production date
•voltage
• frequency
•amps
• country of origin
• rated ambient temperature.
The model data decal also displays
certification symbols by Underwriter’s
Laboratory (UL) and the Southwest Research
Institute (SwRI).
Fuel Inlet Pressure
Displays unit serial number, along with
minimum and maximum inlet pressures for
natural gas (NG) and liquid propane (LP)
supply. Space is provided for the installer to
enter maximum flow rates based on installed
pipe sizes and lengths.

General Information
10 Owner’s Manual for 60 Hz Air-Cooled Generators
Specifications
Generator
Engine
A detailed specification sheet for your particular generator is available from your local Independent Authorized Service
Dealer (IASD).
Model 9 kW 11 kW 16 kW 20 kW 22 kW
Rated Voltage 240
Rated Maximum Load
Current (Amps) at Rated
Voltage with LP*
37.5 45.8 66.6 83.3 91.7
Main Line Circuit Breaker
(Generator Disconnect) 40 Amp 50 Amp 70 Amp 90 Amp 100 Amp
Phase 1
Rated AC Frequency 60 Hz
Battery Requirement
(Field supplied)
12 volts, Group 26R-540CCA Minimum or Group 35AGM-650CCA Minimum
(see Replacement Parts)
Enclosure Aluminum
Weight (lb/kg)
(without battery) 340/154 348/158 409/186 448/203 466/211
Normal Operating Range
This unit is tested in accordance to UL 2200 standards with an operating temperature of -20 °F (-29 °C) to
122 °F (50 °C). For areas where temperatures fall below 32 °F (0 °C) a cold weather kit is recommended.
When operated above 77 °F (25 °C), there may be a decrease in engine power. See
Engine .
These generators are rated in accordance with UL 2200, Safety Standard for Stationary Engine Generator Assemblies, and CSA-C22.2 No. 100-04
Standard for Motors and Generators.
* Natural gas ratings will depend on specific fuel joules/BTU content. Typical derates are between 10-20% off the LP gas rating.
Model 9 kW 11 kW 16/20/22 kW
Type of Engine G-Force 400 Series G-Force 500 Series G-Force 1000 Series
Number of Cylinders 1 2 2
Displacement 426 cc 530 cc 999 cc
Cylinder Block Aluminum with cast iron sleeve
Recommended Spark Plug See Replacement Parts
Spark Plug Gap 0.020 in (0.508 mm) 0.030 in (0.76 mm) 0.040 in (1.02 mm)
Valve Clearance 0.002–0.004 in
(0.05–0.1 mm)
0.002–0.004 in
(0.05–0.1 mm)
0.002–0.004 in
(0.05–0.1 mm)
Starter 12 VDC
Oil Capacity Including Filter Approx. 1.1 qt (1.03 L) Approx. 1.7 qt (1.6 L) Approx. 1.9 qt (1.8 L)
Recommended Oil Filter See Replacement Parts
Recommended Air Filter See Replacement Parts
Engine power is subject toand limited by such factors as fuel BTU/joules, ambient temperature, and altitude. Engine power decreases approximately
3.5% for each 1000 ft (304.8 m) above sea level, and also will decrease about 1% for each 10 °F (6 °C) above 60 °F (15 °C) ambient temperature.

General Information
Owner’s Manual for 60 Hz Air-Cooled Generators 11
Protection Systems
The generator may need to run for long periods of time
with no operator present to monitor engine or generator
conditions. The generator is equipped with protection
systems to automatically shut down the unit to protect
against potentially damaging conditions. Some of these
systems include:
Alarms:
Warnings:
The control panel contains a display alerting the operator
when a fault condition occurs. The above list is not all-
inclusive. See Operation for more information about
alarms and control panel operation.
NOTE: A warning indicates a condition on the generator
which should be addressed, but will not shut down the
generator. An alarm shuts down the generator to protect
the system from any damage. In the event of an alarm,
an owner can clear the alarm and restart the generator
prior to contacting an IASD. Contact an IASD if the
intermittent issue occurs again.
Emission Information
The United States Environmental Protection Agency (US
EPA) (and California Air Resources Board (CARB), for
engines/equipment certified to California standards)
requires that this engine/equipment complies with
exhaust and evaporative emissions standards. Locate
the emissions compliance decal on the engine to
determine applicable standards. For emissions warranty
information, please reference the included emissions
warranty. Follow the maintenance specifications in
Maintenance to ensure the engine complies with
applicable emissions standards for the duration of the
product’s life.
This generator is certified to operate on liquid propane
vapor fuel or pipeline natural gas.
The Emission Control System code is EM (Engine
Modification). The Emission Control System on this
generator consists of the following:
:
Fuel Requirements
The engine has been fitted with a dual fuel carburetion
system. The unit will run on natural gas or LP gas
(vapor), but it has been factory set to run on natural gas.
The fuel system will be configured for the available fuel
source during installation.
Recommended fuels should have a BTU content of at least
1000 BTUs per ft
3
(37.26 megajoules per m
3
) for natural
gas, or at least 2500 BTUs per ft
3
(93.15 megajoules per
m
3
) for LP gas (vapor).
NOTE: If converting to LP gas from natural gas, a
minimum LP tank size of 250 gal (946 L) is recommended.
See the installation manual for complete procedures and
details.
Battery Requirements
12 volts, Group 26R-540CCA minimum or Group 35AGM-
650CCA minimum (not included with unit.) See
Maintenance for proper battery maintenance procedures.
Battery Charger
The battery charger is integrated into the control panel
module in all models. It operates as a smart charger,
ensuring output charging levels are safe and
continuously optimized to promote maximum battery life.
A kit is provided to install a fuse in the transfer switch for
the T1 battery charger connection. Follow the installation
instructions provided with the kit.
NOTE: Do not use external battery chargers.
Engine Oil Requirements
See Engine Oil Requirements in the Maintenance
section for proper oil viscosity.
•High Temperature
•Low Oil Pressure
•Overcrank
•Overspeed
•Overvoltage
•Undervoltage
•Overload
•Underspeed
•RPM Sensor Loss
•Controller Fault
•Wiring Error
•Stepper Overcurrent
•Charger Warning
•Charger Missing AC
•Low Battery
•Battery Problem
•Exercise Set Error
•USB Warning
•Download Failure
System Components
Air Induction - Intake Manifold
- Air Cleaner
Fuel Metering - Carburetor and Mixer Assembly
- Fuel Regulator
Ignition - Spark Plug
- Ignition Module
Exhaust - Exhaust Manifold
- Muffler
(000105)
DANGER
Explosion and Fire. Fuel and vapors are
extremely flammable and explosive. Add fuel
in a well ventilated area. Keep fire and spark
away. Failure to do so will result in death
or serious injury.

General Information
12 Owner’s Manual for 60 Hz Air-Cooled Generators
Activating the Generator
The generator should be activated upon initial start-up.
See the installation manual for complete instructions.
Wi-Fi Module
The generator is equipped with a Wi-Fi module. Refer to
the Wi-Fi module owner’s manual for further instruction.
Replacement Parts
Accessories
NOTE: Performance enhancing accessories are available for air-cooled generators. Contact an IASD or visit
www.generac.com for additional information on replacement parts, accessories, and extended warranties. See also
http://www.ordertree.com/generac/air-cooled-homestandby-generators/.
Description 9 kW 11 kW 16 kW 20 kW 22 kW
26R Exide Battery 0H3421S
Spark Plug
0G0767B
(RC12YC
or equivalent)
0E9368
(RL87YC
or equivalent)
0G0767A
(RC12YC or equivalent)
Oil Filter 070185E
Air Filter 0E9371A 0J8478
Control Panel Fuse 0D7178T
Transfer Switch Fuses Refer to Transfer Switch Manual for part number
Accessory Description
Cold Weather Accessories*—
•Battery Pad Warmer
•Oil Warmer
•Breather Warmer
* each sold separately
•Recommended in areas where temperatures fall below 0 °F (-18 °C).
(Not necessary for use with AGM-style batteries)
•Recommended in areas where temperatures fall below 0 °F (-18 °C).
•Recommended in areas where heavy icing occurs.
Scheduled Maintenance Kit Includes all pieces necessary to perform maintenance on the generator along with oil
recommendations.
Fascia Base Wrap The fascia base wrap snaps together around the bottom of the new air-cooled generators. This
offers a sleek, contoured appearance as well as protection from rodents and insects by covering
the lifting holes located in the base. Requires use of the mounting pad shipped with the generator.
Mobile Link™ Cellular Enabled
Accessory (USA only)
Provides a personalized web portal displaying generator status, maintenance schedule, event
history, and much more. This portal is accessible via computer, tablet, or smart phone. Sends
emails and/or text notifications the moment there is any change in the generator’s status.
Notification settings can be customized to what type of alert is sent and how often. Visit
www.MobileLinkGen.com for more information.
Touch-Up Paint Kit Very important to maintain the look and integrity of the generator enclosure. This kit includes
touch-up paint and instructions.
Extended Warranty Coverage Extend the generator warranty coverage by purchasing extended warranty coverage. Covers both
parts and labor. Extended coverage can be purchased within 12 months of the end-user’s
purchase date.
This extended coverage is applicable to registered units and end-user proof of purchase must be
available upon request.
Available for Generac®and Guardian®products.
Not available for Corepower™, PowerPact™, and EcoGen™ products or all international
purchases.
Wi-Fi LP Fuel Level Monitor The Wi-Fi enabled LP fuel level monitor provides constant monitoring of the connected LP fuel
tank. Monitoring the LP tank level is an important step in making sure your generator is ready to
run during an unexpected power failure. Status alerts are available through the Mobile Link™
application informing you when your LP tank needs a refill.

Operation
Owner’s Manual for 60 Hz Air-Cooled Generators 13
Section 3: Operation
Site Prep Verification
The generator must be installed to allow unimpeded airflow
into and out of the generator.
Mechanical and gravity outdoor air intake openings for air
distribution and supply systems must be located not less
than 10 ft (3.05 m) horizontally from the generator
enclosure. See Section 401.4 in the ICC Mechanical
Code for additional information.
Verify all shrubs or tall grasses within 3 ft (0.91 m) of the
intake and discharge louvers on the sides of the
enclosure have been removed. Install the generator on
high ground where water levels will not rise and
endanger it. This unit should not operate in or be
subjected to standing water. Verify all potential water
sources such as water sprinklers, roof run-off, rain gutter
downspouts, and sump pump discharges are directed
away from the generator enclosure.
Generator Enclosure
Enclosure lid is locked prior to shipment. A set of keys is
attached to the cardboard on top of the generator. An
additional set of keys is attached to the pallet bracket on
the front intake end of the generator.
NOTE: Keys provided with this unit are intended for
service personnel use only.
Opening the Lid
Two locks secure the lid—one on each side (A in Figure 3-
1
). Open the protective rubber cap to access the keyhole,
and press down on the lid above the side lock and unlock
the latch to properly open the lid.
Repeat for the other side. The lid may appear stuck if
pressure is not applied from the top.
Always verify the side locks are unlocked before
attempting to lift the lid.
Removing the Front Access Panel
Remove the front access panel by lifting it straight up and
out once the lid is open.
Always lift the front access panel straight up before pulling
it away from the enclosure (B and C in
Figure 3-1 ). Do not
pull the panel away from the enclosure before lifting up (D
in
Figure 3-1 ).
Figure 3-1. Side Lock Location and Front Panel Removal
Automatic start-up. Disconnect utility power and
render unit inoperable before working on unit.
Failure to do so will result in death or serious injury.
(000191)
DANGER
001797
A
A
BCD

Operation
14 Owner’s Manual for 60 Hz Air-Cooled Generators
Intake Side Panel Removal
See Figure 3-2. The intake side panel (A) must be
removed to access the battery compartment, fuel
regulator, and sediment trap.
1. Raise lid and remove front panel.
2. Use a hex key to remove two mounting screws (B)
and L-bracket screw (C).
3. Lift intake panel up and away from the generator.
NOTE: Always lift intake side panel straight up before
pulling away from enclosure. Do not pull panel away from
the enclosure before lifting up (D).
Figure 3-2. Intake Side Panel Removal
Main Line Circuit Breaker (Generator
Disconnect)
This is a 2-pole breaker rated according to relevant
specifications. See “A” in Figure 3-3.
The breaker can be locked in the OFF (OPEN) position
for security. Use an appropriately-sized padlock (not
included) with a shackle long enough to pass through
both lock tabs (B).
Figure 3-3. Main Breaker
NOTE: DO NOT lock out the MLCB during normal
generator operation. Doing so will compromise automatic
standby functionality.
LED Indicator Lights
Figure 3-4. LED Indicator Lights
See Figure 3-4. Three LEDs are visible behind a
translucent lens on the generator side panel. These
LEDs indicate generator operating status.
•Green LED “Ready” light (A) is illuminated when
utility is present and the control panel is in AUTO
mode. The LED flashes when the automatic
transfer switch converts to generator power during
a utility power outage.
•Red LED “Alarm” light (B) is illuminated when the
generator is OFF or a fault is detected. Contact an
IASD.
•Yellow LED “Non-Critical Alert” light (C) is
illuminated when maintenance is required.
NOTE: Yellow LED may be illuminated at the same time
as either the red or green LED.
D
002961
B
A
C
001810
BA
B
001791
A
C
B

Operation
Owner’s Manual for 60 Hz Air-Cooled Generators 15
Auxiliary Shutdown Switch
All generators are equipped with an external means of
shutting down the generator which complies with the latest
NEC code requirement. The primary generator shutdown
sequence is described in
Shutting Generator Down
While Under Load Or During A Utility Outage
.
See Figure 3-5. There is an auxiliary shutdown switch on
the exterior of the generator back panel. This switch
shuts down the generator and disables restarts.
Figure 3-5. External Auxiliary Shutdown Switch
(all models)
NOTE: Whenever possible, perform the primary
shutdown procedure before disabling the generator with
the auxiliary shutdown switch.
See Figure 3-6. 16-22 kW generators also have an
auxiliary shutdown switch located inside the generator.
Figure 3-6. Internal Auxiliary Shutdown Switch (16-22kW)
The generator will not start if either switch is OPEN (O).
The controller displays an “Auxiliary Shutdown” alarm,
and the red LED “Alarm” light illuminates. To clear this
condition, set the switch or switches to CLOSED (I).
Clear the alarm by pressing the OFF mode button, and
then ENTER. The generator can then be placed back in
AUTO or MANUAL mode.
Control Panel Interface
See Figure 3-7. The control panel interface (A) is located
under the enclosure lid. Verify both the left and right side
locks are unlocked before attempting to lift the lid of the
enclosure. Open the lid as directed in Opening the Lid.
Figure 3-7. Generator Control Panel
The 7.5A fuse is located beneath the rubber cover (B) to
the right of the control panel.
Verify both left and right side locks are securely out of
the way before closing the unit.
All appropriate panels must be in place during any
operation of the generator. This includes operation by a
servicing technician while conducting troubleshooting
procedures.
Using the AUTO/OFF/MANUAL
Interface
NOTE: Damage caused by mis-wiring of interconnect
wires is not warrantable.
005491
CAUTION
(000399)
Equipment Damage. The auxiliary shutdown switch is
not to be used to power down the unit under normal
operating circumstances. Doing so will result in
equipment damage.
005492
Button Description of Operation
AUTO
Activates fully automatic system operation. It
allows the unit to automatically start and
exercise the generator according to the
exercise timer (see Setting the Exercise
Timer).
The green LED flashes when the automatic
transfer switch converts to generator power
during a utility power outage.
OFF Shuts down the engine and prevents automatic
operation of the unit.
MANUAL
Cranks and starts the generator. Transfer to
standby power will not occur unless there is a
utility failure.
The blue LED flashes when the automatic
transfer switch converts to generator power
during a utility power outage.
001798
A
B

Operation
16 Owner’s Manual for 60 Hz Air-Cooled Generators
Interface Menu Displays
LCD Panel
Feature Description
HOME
page
Default page displayed if no buttons are
pressed for 60 seconds. Normally shows
current status message, and current date and
time. The highest priority active alarm/warning
is automatically posted on this page, as well as
flashing the backlight when such a condition is
detected. In the case of multiple alarms/
warnings, only the first message is displayed.
Press the OFF mode button and then the
ENTER button to clear an alarm or warning.
When “Hours of Protection” is displayed, this
represents the total time the generator has
been monitoring utility supply and ready to
provide backup power if needed.
Display
Backlight
Normally off. The backlight will automatically
illuminate and remain on for 30 seconds if the
operator presses any button.
MAIN
MENU
page
Allows the operator to navigate to all other
pages or sub-menus by using the arrow keys
and the ENTER button. Page can be accessed
at any time with several presses of the
dedicated ESCAPE button. Each press of the
ESCAPE button takes the operator to the
previous menu until the MAIN MENU displays.
This page contains information for History;
Status; Edit; and Debug.