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Operator’s Manual
Liquid-Cooled
Home Generator System
2 BRIGGSandSTRATTON.COM
Thank you for purchasing this quality-built Briggs & Stratton home generator. We’re pleased that you’ve placed your
confidence in the Briggs & Stratton brand. When operated and maintained according to the instructions in this manual, your
home generator will provide many years of dependable service.
This manual contains safety information to make you aware of the hazards and risks associated with home standby
generators and how to avoid them. Because we do not necessarily know all the applications this equipment could be used
for, it is important that you read and understand these instructions thoroughly before attempting to start or operate this
equipment. Save these original instructions for future reference.
This home generator requires professional installation before use. Refer to the separate installation manual for full
information. Your installer should follow the instructions completely.
Where to Find Us
You never have to look far to find Briggs & Stratton support and service for your generator. Consult your Yellow Pages. There
are thousands of Briggs & Stratton authorized service dealers worldwide who provide quality service. You can also contact
Technical Service by phone at 800743-4115, or click on Find a Dealer at BRIGGSandSTRATTON.COM, which provides a list of
authorized dealers.
Generator and engine model and serial numbers should be recorded in the installation manual.
Briggs & Stratton Power Products Group, LLC
P.O. Box 702
Milwaukee, WI 53201-0702
Copyright © 2012. All rights reserved. No part of this material
may be reproduced or transmitted in any form without the express
written permission of Briggs & Stratton Power Products Group, LLC.
3
Table of Contents
Important Safety Instructions........................4
Installation ....................................7
For the Installing Dealer/Contractor: ..............................7
Owner Orientation ............................................7
Fuel Factors .................................................8
Generator Location............................................8
Delivery Inspection............................................9
Controls ..................................... 10
30 kW Home Generator .......................................10
45 kW Home Generator .......................................11
System Control Panel.........................................12
Access Ports ...............................................13
Operation .................................... 14
Automatic Operation .........................................14
Setting Exercise Timer ........................................15
Maintenance .................................. 15
Fault Detection System .......................................15
Generator Maintenance .......................................17
Engine Maintenance..........................................18
Battery ....................................................21
Storage....................................................22
Maintenance Chart.............................. 23
Troubleshooting................................ 24
Warranty..................................... 25
Product Specifications ........................... 28
4 BRIGGSandSTRATTON.COM
Important Safety Instructions
SAVE THESE INSTRUCTIONS - This manual contains
important instructions that should be followed during
installation and maintenance of the generator and batteries.
Safety Symbols and Meanings
The safety alert symbol indicates a potential personal
injury hazard. A signal word (DANGER, WARNING, or
CAUTION) is used with the alert symbol to designate a degree
or level of hazard seriousness. A safety symbol may be used
to represent the type of hazard. The signal word NOTICE is
used to address practices not related to personal injury.
DANGER indicates a hazard which, if not avoided, will
result in death or serious injury.
WARNING indicates a hazard which, if not avoided, could
result in death or serious injury.
CAUTION indicates a hazard which, if not avoided, could
result in minor or moderate injury.
NOTICE addresses practices not related to personal injury.
The manufacturer cannot possibly anticipate every possible
circumstance that might involve a hazard. The warnings in
this manual, and the tags and decals affixed to the unit are,
therefore, not all-inclusive. If you use a procedure, work
method or operating technique that the manufacturer does
not specifically recommend, you must satisfy yourself that
it is safe for you and others. You must also make sure that
the procedure, work method or operating technique that you
choose does not render the generator system unsafe.
Fire
Toxic Fumes
Explosive Pressure
Rotating Fan Blade
Lift Hazard Read Manual
Exploding BatteryRotating Belt/Pulley
Chemical BurnAuto Start
Hot SurfaceRotating Parts
Electrical ShockExplosion
WARNING The engine exhaust from this product
contains chemicals known to the State of California to
cause cancer, birth defects, or other reproductive harm.
WARNING Certain components in this product and
related accessories contain chemicals known to the State
of California to cause cancer, birth defects, or other
reproductive harm. Wash hands after handling.
WARNING Running engine gives off carbon monoxide,
an odorless, colorless, poison gas.
Breathing carbon monoxide could result in death,
serious injury, headache, fatigue, dizziness,
vomiting, confusion, seizures, nausea or fainting.
• Operate this product ONLY outdoors.
• Install a battery operated carbon monoxide alarm near
the bedrooms.
• Keep exhaust gas from entering a confined area through
windows, doors, ventilation intakes, or other openings.
WARNING Storage batteries give off explosive
hydrogen gas during recharging.
Slightest spark will ignite hydrogen
and cause explosion, resulting
in death, serious injury and/or
property damage.
Battery electrolyte fluid contains acid and is
extremely caustic.
Contact with battery contents could cause severe
chemical burns.
A battery presents a risk of electrical shock and high short
circuit current.
• DO NOT dispose of battery in a fire. Recycle battery.
• DO NOT allow any open flame, spark, heat, or lit cigarette
during and for several minutes after charging a battery.
• DO NOT open or mutilate the battery.
• Wear protective goggles, rubber apron, rubber boots and
rubber gloves.
• Remove watches, rings, or other metal objects.
• Use tools having insulated handles.
5
WARNING Generator produces hazardous voltage.
Failure to properly ground generator could result
inelectrocution.
Failure to isolate generator from utility power could
result in death or serious injury to electric utility
workers due to backfeed of electrical energy.
• When using generator for backup power, notify
utility company.
• DO NOT touch bare wires or bare receptacles.
• DO NOT use generator with electrical cords which are
worn, frayed, bare or otherwise damaged.
• DO NOT handle generator or electrical cords while
standing in water, while barefoot, or while hands or
feet are wet.
• If you must work around a unit while it is operating,
stand on an insulated dry surface to reduce the risk of
a shock hazard.
• DO NOT allow unqualified persons or children to operate
or service generator.
• In case of an accident caused by electrical shock,
immediately shut down the source of electrical power and
contact the local authorities. Avoid direct contact with
the victim.
• Despite the safe design of the residential generator,
operating this equipment imprudently, neglecting its
maintenance or being careless could cause possible
injury or death.
• Remain alert at all times while working on this equipment.
Never work on the equipment when you are physically
or mentally fatigued.
• Before performing any maintenance on the generator,
disconnect the battery cable indicated by a NEGATIVE,
NEG or (-) first. When finished, reconnect that cable last.
• After your system is installed, the generator may crank
and start without warning any time there is a power
failure. To prevent possible injury, always set the
generator’s system switch to OFF, remove the service
disconnect from the disconnect box AND remove the
15 Amp fuse BEFORE working on the equipment.
WARNING Hazardous Voltage - Contact with power
lines could cause electric shock or burns,
resulting in death or serious injury.
Lifting Hazard / Heavy Object - Could result
in serious injury.
• If lifting or hoisting equipment is used, DO NOT contact
any power lines.
• DO NOT lift or move generator without assistance.
• DO NOT lift unit by roof as damage to generator
will occur.
WARNING Propane and Natural Gas are extremely
flammable and explosive, which could cause
burns, fire or explosion resulting in death,
serious injury and/or property damage.
• Install the fuel supply system according to NFPA 37 and
other applicable fuel-gas codes.
• Before placing the generator into service, the fuel system
lines must be properly purged and leak tested.
• After the generator is installed, you should inspect the fuel
system periodically.
• NO leakage is permitted.
• DO NOT operate engine if smell of fuel is present or other
explosive conditions exist.
• DO NOT smoke around the generator. Wipe up any oil
spills immediately. Ensure that no combustible materials
are left in the generator compartment. Keep the area near
the generator clean and free of debris.
WARNING
Exhaust heat/gases could ignite combustibles
or structures resulting in death, serious
injury and/or property damage.
Contact with muffler area could cause
burns resulting in serious injury.
• DO NOT touch hot parts and AVOID hot exhaust gases.
• Allow equipment to cool before touching.
• DO NOT install the generator closer than 5 feet (1.5m)
from any combustibles or structures with combustible
walls having a fire resistance rating of less than 1 hour.
• Keep at least minimum distances shown in General
Location Guidelines to insure for proper generator cooling
and maintenance clearances.
• It is a violation of California Public Resource Code,
Section 4442, to use or operate the engine on any forest-
covered, brush-covered, or grass-covered land unless
the exhaust system is equipped with a spark arrester, as
defined in Section 4442, maintained in effective working
order. Other states or federal jurisdictions may have
similar laws.
Contact the original equipment manufacturer, retailer, or
dealer to obtain a spark arrester designed for the exhaust
system installed on this engine.
• Replacement parts must be the same and installed in the
same position as the original parts.
6 BRIGGSandSTRATTON.COM
WARNING Moving parts could crush and cut.
Starter and other rotating parts could
entangle hands, hair, clothing, or
accessories resulting in serious injury.
• NEVER operate generator without protective housings,
covers, or guards in place.
• DO NOT wear loose clothing, jewelry or anything that
could be caught in the starter or other rotating parts.
• Tie up long hair and remove jewelry.
• Before servicing, remove 15 Amp fuse from control panel
and disconnect Negative (NEG or -) battery cable.
WARNING Hot pressurized coolant could cause serious
injury and/or property damage.
• DO NOT open radiator cap when hot.
• Before servicing, allow coolant to cool.
CAUTION Installing the 15A fuse could cause the
engine to start at any time without warning
resulting in minor or moderate injury.
• Observe that the 15 Amp fuse has been removed from the
control panel for shipping.
• DO NOT install this fuse until all plumbing and wiring has
been completed and inspected.
CAUTION Excessively high operating speeds could
result in minor injury and/or equipment damage.
Excessively low speeds impose a heavy load on generator.
• DO NOT tamper with governed speed. Generator supplies
correct rated frequency and voltage when running at
governed speed.
• DO NOT modify generator in any way.
NOTICE Exceeding generators wattage/amperage
capacity could damage generator and/or electrical devices
connected to it.
• Start generator and let engine stabilize before connecting
electrical loads.
NOTICE Improper treatment of generator could damage it
and shorten its life.
• Use generator only for intended uses.
• If you have questions about intended use, contact your
authorized dealer.
• Operate generator only on level surfaces.
• Adequate, unobstructed flow of cooling and ventilating air
is critical to correct generator operation.
• The access panels/doors must be installed whenever the
unit is running.
• DO NOT expose generator to excessive moisture, dust,
dirt, or corrosive vapors.
• Remain alert at all times while working on this equipment.
Never work on the equipment when you are physically
or mentally fatigued.
• DO NOT start engine with air cleaner or air cleaner
cover removed.
• DO NOT insert any objects through cooling slots.
• DO NOT use the generator or any of its parts as a step.
Stepping on the unit could cause stress and break parts.
This may result in dangerous operating conditions from
leaking exhaust gases, fuel leakage, oil leakage, etc.
• If connected devices overheat, turn them off and
disconnect them from generator.
• Shut off generator if
- electrical output is lost;
- equipment sparks, smokes, or emits flames;
- unit vibrates excessively.
7
Installation
We sincerely appreciate your patronage. For this reason, we
have made every effort to provide for a safe, streamlined
and cost-effective installation. Because each installation is
unique, it is impossible to know of and advise the trade of all
conceivable procedures and methods by which installation
might be achieved. Neither could we know of possible
hazards and/or the results of each method or procedure.
For these reasons, only current licensed electrical and
plumbing professionals should attempt home generator
system installations. Installations must strictly comply with
all applicable codes, industry standards andregulations.
Your home generator is supplied with this “Operator’s
Manual” and a separate “Installation Manual”. These are
important documents and should be retained by the owner
after the installation has been completed.
For the Home Owner:
To help you make informed choices and communicate
effectively with your installation contractor(s), read and
understand Owner Orientation in this manual before
contracting or starting your home generatorinstallation.
To arrange for proper installation, contact the store at which
you purchased your home generator, your dealer, a licensed
electrician or your utility power provider.
The home generator warranty is VOID unless the system is
installed by licensed electrical and plumbingprofessionals.
Every effort has been made to ensure that information in this
manual is accurate and current. However, we reserve the
right to change, alter, or otherwise improve the product and
this document at any time without prior notice.
The Emission Control System for this generator is warranted
for standards set by the U.S. Environmental Protection
Agency and by the California Air Resources Board (CARB).
For the Installing Dealer/Contractor:
For most applications, the Installation manual contains all the
information required to properly install and start the home
generator. This operator’s manual describes routine operation
and owner maintenanceprocedures.
If you need more information in this matter, please call
800743-4115, between 8:00 AM and 5:00 PM CT.
Owner Orientation
This section provides home generator owners with the
information necessary to achieve the most satisfactory and
cost effective installation possible.
The illustrations are for typical circumstances and are meant
to familiarize you with the installation options available with
your home generator. A thorough understanding of these
options will provide fundamental control over the cost of
your installation, as well as ensure your final satisfaction
andsecurity.
Federal and local codes, appearance, noise levels, fuel types,
and distances are the factors that must be considered when
negotiating with an installation professional. Remember
that as the distance from the existing electrical service and
gaseous fuel supply increases, and the number of 90 degree
bends in the fuel supply increases, compensations in piping
and wiring materials must be made. This is necessary to
comply with local codes and overcome electrical voltage
drops and gaseous fuel pressure drops.
The factors mentioned above will have a direct affect on
the overall price of your home generator installation.
In some areas you may need to acquire electrical permits for
installing the home generator, building permits for installing
gas lines, and permits for noise allowances. Your installer
should check your local codes AND obtain the permits before
installing the system.
8 BRIGGSandSTRATTON.COM
Fuel Factors
An important consideration affecting the entire installation is
the type of fuel used by your home generator. The system
was factory tested and adjusted using either natural gas or
liquid propane (LP vapor). For proper engine function, factors
that are inherent to each of these fuels, your location and
the duration of possible utility interruptions are important
considerations in the following fuel guidelines:
 • Useclean,dryfuel,freeofmoistureorany
particulate material. Using fuels outside the following
recommended values may cause performanceproblems.
 • Inenginessetuptorunonpropane(LP),commercial
grade HD5 propane with a minimum fuel energy of 2500
BTUs/ft3 with maximum propylene content of 5% and
butane and heavier gas content of 2.5% and minimum
propane content of 90%.
Natural gas rating will depend on specific fuel but typical
derates are between 10 to 20% off the LP gas rating.
Power Decrease at High Altitude or High Temperature
Air density is less at high altitudes, resulting in less available
engine power. Specifically, engine power will decrease 3.5%
for each 1,000 feet (300 meters) above sea level and 1% for
each 10° F (5.6°C) above 77°F (25°C). Make sure you and
your installer consider these factors when determining total
generator load.
Generator Location
The actual physical location of your home generator has a
direct affect on:
1. The amount of plumbing required to fuel yourgenerator.
2. The amount of wiring required to control and connect
your generator.
Specific location guidelines are discussed in the installation
manual. Acquaint yourself with that information and confer
with your installer. Be sure to ask how your site might
affect installation costs and compliance with local codes
andstandards.
The generator must be installed outdoors. DO NOT install
generator where exhaust gas could accumulate and enter
inside or be drawn into a potentially occupied building.
Ensure exhaust gas is kept away from any windows, doors,
ventilation intakes or other openings that can allow exhaust
gas to collect in a confined area. Prevailing winds and air
currents should be taken into consideration when positioning
generator. See the installation manual for full details on safe
generator location.
WARNING
Propane and Natural Gas are extremely
flammable and explosive, which could cause
burns, fire or explosion resulting in death,
serious injury and/or property damage.
• The residential generator is equipped with an automatic
safety gas “fuel shut-off” valve.
• DO NOT operate the equipment if the “fuel shut-off” valve
is missing or inoperative.
WARNING Running engine gives off carbon monoxide,
an odorless, colorless, poison gas.
Breathing carbon monoxide could result in death,
serious injury, headache, fatigue, dizziness,
vomiting, confusion, seizures, nausea or fainting.
• Operate this product ONLY outdoors.
• Install a battery operated carbon monoxide alarm near
the bedrooms.
• Keep exhaust gas from entering a confined area through
windows, doors, ventilation intakes, or other openings.
WARNING Exhaust heat/gases could ignite
combustibles or structures resulting in death,
serious injury and/or propertydamage.
• DO NOT install the generator closer than 5 feet (1.5m)
from any combustibles or structures with combustible
walls having a fire resistance rating of less than 1 hour.
9
Delivery Inspection
Carefully inspect the home generator for any damage that
may have occurred during shipment.
If loss or damage is noted at time of delivery, have the
person(s) making delivery note all damage on the freight bill
and affix his signature under the consignor’s memo of loss
or damage. If loss or damage is noted after delivery, separate
the damaged materials and contact the carrier and your
installer for claim procedures. Missing or damaged parts are
not warranted.
The home generator is supplied with:
 • Fully-servicedcoolantsystem
 • Fully-servicedoil/lubricatingsystem
 • Flexiblefuelhook-uphose
 • Installationandstart-upmanual
 • Operator’smanual
 • Spareaccessdoorkeys
 • Spare15Afuse
 • Tenpinconnector
 • Touchuppaint
 • RemoteLEDindicatorkit(LED/plate/screws)
To be supplied by installer:
 • Startingbattery
 • Reinforcedconcretemountingpad
 • Connectingwireandconduit
 • Fuelsupplyvalves/plumbing
 • Variousspecialtytools/equipment
10 BRIGGSandSTRATTON.COM
Controls
30 kW Home Generator
Read this Operator’s Manual and Important Safety Instructions before operating your generator.
Compare the illustrations of this 30kW model with your generator to familiarize yourself with the locations of various
controls and adjustments. Save this manual for future reference.
Generator is pictured with access doors and removed and
screen guard open for clarity
A - Exhaust Port — High-performance muffler lowers engine
noise to comply with most residential codes.
B - Coolant Fill Door — Provides access for servicing engine
with oil and coolant.
C - Air Cleaner — Protects engine by filtering dust and debris
out of intake air.
D - Battery Door opening — Provides access to starting
battery and air cleaner.
E - Engine Label — Located on the ECM bracket, it identifies
engine model and type.
F - Oil Dip Stick — Used to check the engine oil level.
G - Oil Fill Cap — Remove to service the engine with
recommended oil.
H - Screen Guard — Prevents fingers from touching radiator
fan and houses the coolant recovery bottle. Must stay
closed while generator is in use.
J - Coolant Recovery Bottle — Located on inside of screen
guard. Provides visual indicator of engine coolant level.
K - Oil Filter — Filters engine oil to prolong system life.
L - Fuel Inlet — Fuel supply is connected here.
M - Oil Drain Hose — Provided to facilitate oil changing.
N - ID Label (located on base) — Identifies unit by
serial number.
P - Circuit Breaker Enclosure — Equipped with removable
bottom to assist with conduit connection.
R - Control Panel Door opening — Provides access to
control panel, oil filter, etc. (may be two doors)
S - Control Panel — Used for various test, operation and
maintenance functions. See System Control Panel.
A
D
E
F
J
N
R
P L
K
G
C
B
M
H
S
H
11
45 kW Home Generator
Compare the illustrations of this 45kW model with your generator to familiarize yourself with the locations of various controls
and adjustments. Save this manual for future reference.
Generator is pictured with access doors and removed and
screen guard open for clarity
A - Exhaust Port — High-performance muffler lowers engine
noise to comply with most residential codes.
B - Coolant Fill Door — Provides access for servicing engine
with oil and coolant.
C - Air Cleaner — Protects engine by filtering dust and debris
out of intake air.
D - Battery Door opening — Provides access to starting
battery and air cleaner and oil filter.
E - Oil Filter — Filters engine oil to prolong system life.
F - Oil Drain Hose — Provided to facilitate oil changing.
G - Coolant Recovery Bottle — Located on inside of screen
guard. Provides visual indicator of engine coolant level.
H - Screen Guard — Prevents fingers from touching radiator
fan and houses the coolant recovery bottle. Must stay
closed while generator is in use.
J - Engine Label — Located on the ECM bracket, it identifies
engine model and type.
K - Oil Fill Cap — Remove to service the engine with
recommended oil.
L - Control Panel — Used for various test, operation and
maintenance functions. See System Control Panel.
M - Control Panel Door opening — Provides access to
control panel, etc. (may be two doors)
N - Circuit Breaker Enclosure — Equipped with removable
bottom to assist with conduit connection.
P - ID Label (located on base) — Identifies unit by model
and serial number.
R - Oil Dip Stick — Used to check the engine oil level.
S - Fuel Inlet — Fuel supply is connected here.
A
B
C
D
E
F
G
H
J
K
L
M
N
P
R
S
H
12 BRIGGSandSTRATTON.COM
System Control Panel
Compare this control panel illustration with your generator to familiarize yourself with the location of these important controls:
A – Circuit Breaker — Protects the system from shorts and
other over-current conditions. Must be ON to supply
power to the automatic transfer switch.
B – SET EXERCISE — Used to set the exercise cycle start
time. Exercise cycle only occurs in AUTO mode.
C – MANUAL OVER-RIDE — With system switch in AUTO
position, push the manual over-ride button for six
seconds to start the generator. To turn off the generator,
push and hold the manual over-ride button until
engine stops.
D – 15 Amp Fuse — Protects the system DC control circuits.
If the fuse has ‘blown’ (melted open) or was removed,
the engine cannot crank or start. Replace the fuse using
only an identical ATO 15A fuse.
E – System Switch — This two-position switch is the most
important control on the system and is used as follows:
•AUTO” position is the normal operating position. If a
utility power outage is sensed, the system will start the
generator. When utility power is restored, AUTO lets
the engine stabilize internal temperatures, shuts off the
generator, and waits for the next utility power outage.
•OFF” position turns off running generator, prevents
unit from starting and resets any detected faults.
F Digital Display — Displays the total number of hours
the generator has been running, fault codes, and engine
malfunctions related to emission components.
 • Hourmeterisdisplayedasaconstantnumberand
indicates the total hours of operation. Used to schedule
maintenance tasks.
 • Faultconditionsaredisplayedasanalpha-numeric,and
will flash “FC_” followed by a fault code number. Used
for troubleshooting operational problems with the home
generator. All fault conditions are described in Fault
Detection System.
 • Malfunctionsrelatedtoemissioncomponentsare
displayed as “ENG-”. The display will flash hours
and “ENG-” in three second intervals. The engine
will continue to operate, but an authorized service
technician must be notified to diagnose, repair, and
reset the fault condition. Engine malfunctions are
described in Fault Detection System.
A
B
C
D
E
F
13
Access Ports
The home generator is equipped with an enclosure that has
several access doors. The doors are named for a significant
component located behind them, as follows::
A - Fuel Inlet port (shown for reference)
B - Control Panel door
C - Exhaust opening (shown for reference)
D - Coolant Fill door
E - Battery door
F - Muffler door
The enclosure also includes muffler and radiator access
panels, used for cleaning those components. Those panels
should remain closed at all other times to assure proper
cooling, reduce noise, and for added safety.
Each home generator is supplied with a set of identical keys.
These keys fit the locks that secure the access doors.
To open access door:
1. Insert key into lock of access door handle and turn key
one quarter turn counterclockwise.
2. Grasp door’s handle and turn one quarter turn
counterclockwise to open. Remove key.
3. Coolant Fill door is unlocked in the same manner. It can
be used for adding coolant or oil.
To close access door:
1. Close door and turn door’s handle one quarter
turnclockwise.
2. Insert key into lock of door handle and turn key one
quarter turn clockwise. Remove key.
Screen Guard
To gain access to the engine and cooling system
components:
1. Remove two screws (A) and washers at top and bottom
of screen guard.
2. The screen guard will swing open to allow access to the
engine and the cooling system components.
A
WARNING Contact with muffler area could cause burns
resulting in serious injury.
• DO NOT touch hot parts and AVOID hot exhaust gases.
• Allow equipment to cool before touching.
A
B
E
C
D
F
14 BRIGGSandSTRATTON.COM
Operation
Important Owner’s Considerations
Engine Oil
This engine is shipped from the factory pre-run and filled
with non-synthetic oil (API SL 10W-30W). This allows
for system operation in a wide range of temperature and
climate conditions. Before starting the engine, check oil
level and ensure that engine is serviced as described in the
Maintenance section.
Coolant System
This engine is shipped from the factory filled with a
50-50 mix of automotive (ethylene glycol) anti-freeze and
water. This will provide optimum year round protection
against freezing, boiling and corrosion. The coolant system
incorporates an optional water heater that operates when
ambient temperature is below 80ºF AND utility power is
present at the transfer switch. Before starting the engine,
check coolant level as described in the Maintenance section.
Battery
The installer must supply a valve-regulated, rechargeable
12 volt DC starting battery. See Battery in Final Installation
Considerations in the installation manual.
15 Amp Fuse
The generator’s 15 Amp fuse is critical to correct system
operation. The 15 Amp fuse was removed at the factory to
prevent the unit from starting during shipping. Your installer
will ensure the fuse is properly installed upon completion of
the installation.
NOTICE Any attempt to crank or start the engine before
it has been properly serviced with the recommended
coolant or oil will result in equipment failure.
• Refer to the Maintenance section for coolant and oil fill
information.
• Damage to equipment resulting from failure to follow this
instruction will void engine and generator warranty.
WARNING Battery posts, terminals and related
accessories contain lead and lead compounds - chemicals
known to the State of California to cause cancer and
reproductive harm. Wash hands after handling.
Automatic Operation
To select automatic operation, do the following:
1. Confirm 15 Amp fuse is installed in control panel.
2. Set the main distribution panel circuit breaker that
sends utility voltage to the transfer switch to ON.
3. Set the generator’s circuit breaker to its ON position.
4. Set the control panel system switch to AUTO.
Checking Automatic Operation
To check the system for proper automatic operation, proceed
as follows:
1. Turn OFF the service disconnect or main distribution
panel circuit breaker sending power to the automatic
transfer switch.
When utility voltage is lost and the sensor has timed
out, the engine will crank and start. Let the system go
through its entire automatic operation sequence.
2. With the generator output supplying its loads, turn ON
the service disconnect or main distribution panel circuit
breaker that supplies utility power to the automatic
transfer switch.
3. The automatic transfer switch will transfer loads back
to utility power after a 5 minute minimum run time and
utility power is available.
4. The generator will run for an additional one minute for
engine cool down, then shut down.
If utility power is restored and generator does not shut down
after 10 minutes, set system switch to OFF and contact your
installer or local service center.
This completes the test procedures for automatic operation.
The home generator will now start automatically and will
supply power to the transfer switch when utility power islost.
CAUTION Installing the 15A fuse could cause the
engine to start at any time without warning
resulting in minor or moderate injury.
• Observe that the 15 Amp fuse has been removed from the
control panel for shipping.
• DO NOT install this fuse until all plumbing and wiring has
been completed and inspected.
15
Setting Exercise Timer
The home generator is equipped with an exercise timer that
will start and exercise the system once every seven days.
During this exercise period, the unit runs for approximately
20 minutes and then shuts down. Electrical load transfer
DOES NOT occur during the exercise cycle (unless an utility
power outage occurs).
A button on the control panel is labeled “SET EXERCISE”
(see System Control Panel). The specific day and the
specific time of day this button is pressed is programmed
into the control board memory. This date and time is then
used to automatically initiate the system exercise cycle. The
“SETEXERCISE” legend on the control panel will flash until
the set exercise cycle is set.
To perform the Set Exercise procedure:
1. Choose the day and time you want your home generator
to exercise.
2. On that day and time, press and hold “SET EXERCISE”
for three seconds.
The “Set Exercise” display will illuminate then turn off
to confirm that the exercise timer has been set. Then
release the button.
The unit will crank and run the exercise cycle. During
the cycle, “Set Exercise” will illuminate.
Once the exercise cycle is complete, the unit will turn off
and “Set Exercise” will no longer be displayed.
The exercise cycle may be discontinued at anytime by
turning the System Switch to OFF.
3. The unit will then start and run it’s 20 minute
exercisecycle.
For example, if you press SET EXERCISE on Sunday morning
at 10:00 AM, the unit will run an immediate exercise cycle
and an exercise cycle every following Sunday at 10:00 AM
(+/- 1/2 hour).
“Set Exercise” will only work if the unit is in the AUTO mode
and this exact procedure is followed. The exerciser will need
to be re-set if the 15 Amp fuse is removed or changed, or if
the starting battery is disconnected.
If you want to change the day and time the unit exercises,
simply perform the “Set Exercise” procedure at the exact
weekday and time you want it to take place.
Generator will not exercise if timer is not set.
Maintenance
The generator warranty does not cover items that have been
subjected to operator abuse or neglect. To receive full value
from the warranty, the operator must maintain the system as
instructed in the Maintenance section.
Servicing the System
Before performing any generator maintenance, always
perform the following steps:
1. Set generator’s circuit breaker to its OFF position.
2. Set control panel system switch to OFF.
3. Remove 15 Amp fuse from control panel.
4. Utility voltage is present at generator control panel.
Disconnect power before servicing control panel by
removing the fuses from the transfer switch.
5. After all servicing has been completed, reinstall fuses in
transfer switch, replace 15 Amp fuse in control panel,
set system switch and circuit breaker ON and reset
exercise timer. See Setting Exercise Timer.
Fault Detection System
The generator may have to run for long periods of time with
no operator present. For that reason, the system is equipped
with sensors that automatically shut down the generator in
the event of potentially damaging conditions, such as low oil
pressure, high temperature, over speed, and otherconditions.
The generator’s control panel has a digital display that shows
fault codes, like “FC_1”. The table below lists the detected
fault, the fault code as displayed on the control panel, and the
number of LED flashes (also described as ‘blinks’) seen on
the remote LED indicator.
Fault Description Fault Codes LED Flashes
Low battery voltage FC_1 1
Low oil pressure FC_2 2
Low voltage FC_3 3
Engine fails to start FC_4 4
Low frequency FC_5 5
Engine overspeed FC_6 6
High temperature FC_7 7
Transfer switch fault FC_8 8
Emission Related Fault
ENG-
No Flash
The remote LED indicator is installed at a convenient inside
location. The LED will remain lit when the generator is in
AUTO. Should a system fault be detected, the LED will turn
on and off in a series of blinks that identify the problem. The
blink pattern is repeated with a brief pause between each
series of blinks.
16 BRIGGSandSTRATTON.COM
Reset Fault Detection System
The operator must reset the fault detection system each
time it activates. To do so, place the control panel system
switch in the OFF position for 30 seconds or more. Remedy
the fault condition, then return the generator to service by
installing the 15 Amp fuse, placing the system switch in the
AUTO position, and resetting the exercise timer. See Setting
Exercise Timer in Operation.
A description of each fault and suggested remedies are
asfollows:
No LED - Discharged Battery
If there is a detected fault condition but the LED is not
blinking, this is because the battery is completely discharged.
To remedy the problem, remove the 15 Amp fuse and
disconnect the battery from the generator. Take the battery to
a local battery store for analysis. Reinstall battery after it has
been fully recharged, connecting the NEGATIVE cable last.
Then reset the fault detection system, as described earlier.
Low Battery Voltage (FC_1)
This fault is indicated by fault code FC_1 and one blink on the
LED indicator. This condition occurs if the generator cannot
start because the starting battery output power is below that
needed to crank the engine. Causes for this problem may be
a faulty battery or battery charge circuit.
To remedy the problem, contact your local service center to
check the battery charge output. Remove the 15 Amp fuse
and disconnect the battery from the generator. Take the
battery to a local battery store for analysis.
Reinstall the battery (replace if necessary - see Battery in
Final Installation Considerations in the installation manual).
Then reset the fault detection system, as described earlier.
Low Oil Pressure (FC_2)
This fault is indicated by fault code FC_2 and two blinks on
the remote LED indicator. The unit is equipped with an oil
pressure switch that uses normally closed contacts held open
by engine oil pressure during operation. Should oil pressure
drop below the 8 psi range, switch contacts close and the
engine is shut down.
To remedy the low oil pressure condition, add the
recommended oil to the FULL mark on the dipstick.
If the low oil pressure condition still exists, the engine will
start, then shut down again. The fault code will appear and
the LED will flash. In this case, contact an authorized dealer.
Low Voltage (Generator, FC_3)
This fault is indicated by fault code FC_3 and three blinks on
the LED indicator. This condition is caused by a restriction in
the fuel flow, a broken or disconnected signal lead, a failed
alternator winding, the control panel circuit breaker is open,
or the generator is overloaded.
To remedy the problem, contact your installer or an
authorized dealer.
Engine Fail To Start (FC_4)
This fault is indicated by fault code FC_4 and four blinks on
the LED indicator. This feature prevents the generator from
damaging itself if it continually attempts to start in spite
of another problem, such as no fuel supply. Each time the
system is directed to start, the unit will crank for 10seconds,
pause for 10 seconds, and repeat. If the system does not
begin producing electricity after approximately 2minutes, the
unit will stop cranking and the LED will blink.
Check to make sure the generator’s circuit breaker is in the
ON position in order for the sensing leads to verify that the
unit is running.
The most likely cause of this problem is no fuel supply.
Check the internal and external fuel shut off valves to
ensure they are fully open. Other causes could be failed
spark plug(s), failed engine ignition, or the engine air filter
is clogged. You may need to contact your installer for
assistance if you can’t remedy these problems.
Low Frequency (FC_5)
This fault is indicated by fault code FC_5 and five blinks on
the LED indicator. This feature protects devices connected
to the transfer switch by shutting the generator down if the
engine runs slower than 55 Hz for three seconds.
This condition is caused by a failed engine component or by
excessive loads on the generator. To remedy the problem,
contact your installer or an authorized dealer.
Engine Overspeed (FC_6)
This fault is indicated by fault code FC_6 and six blinks on
the LED indicator. This feature protects devices connected
to the transfer switch by shutting the generator down if
the engine happens to run faster than the preset limit. The
overspeed fault is detected as follows:
•Ifthegeneratoroutputfrequencyis65-70Hz,afterthree
seconds, the generator will shut down.
•Ifthegeneratoroutputfrequencyisgreaterthan70Hz,
the generator will shut down immediately.
This condition is caused by a failed engine component.
To remedy the problem, contact your installer or an
authorizeddealer.
17
High Temperature (FC_7)
This fault is indicated by fault code FC_7 and seven blinks
on the LED indicator. The contacts of the temperature
switch are normally open. If the engine temperature exceeds
approximately 115°C (240°F), the fault is detected and the
engine shuts down.
Common causes for this condition include running the
unit with all access doors removed, obstructed air inlet or
exhaust port, low oil or coolant level, or debris in the engine
compartment or radiator.
To resolve the problem, let the engine cool down and remove
any accumulated debris and obstructions. Ensure that all
access doors are installed whenever the unit is running.
Transfer Switch Fault (FC_8)
This fault is indicated by fault code FC_8 and eight blinks
on the LED indicator (if transfer switch is equipped with
faultdetection).
The most likely cause of this fault is a blown fuse in the
transfer switch. To remedy the problem, contact your installer
or an authorized dealer.
ENG-
The engine is equipped with on-board diagnostics that moni-
tor the operation of emission related components. If an emis-
sion related problem has been detected, the system control
panel display will alternate between run hours and ENG- in
three second intervals while the generator is running. If ENG-
displays while the generator is running, a diagnostic trouble
code may be set or a problem may exist in the system which
has caused the engine emissions to go outside the standards
certified by the Environmental Protection Agency. It is the
responsibility of the operator to contact an authorized service
technician to repair this condition.
Generator Maintenance
Generator maintenance consists of keeping the unit
clean. Operate the unit in an environment where it will
not be exposed to excessive dust, dirt, moisture or any
corrosive vapors. Cooling air louvers on the enclosure
must not become clogged with snow, leaves, or any other
foreign material. To prevent generator damage caused by
overheating, keep the enclosure cooling inlets and outlets
clean and unobstructed at all times.
Check the cleanliness of the unit frequently and clean when
dust, dirt, oil, moisture or other foreign substances are visible
on its exterior/interior surface. Inspect the air inlet and outlet
openings inside and outside the enclosure to ensure air flow
is not blocked.
DO NOT use direct spray from a garden hose to clean generator.
Water can enter the engine and generator and cause problems.
Cleaning the Generator
1. Set control board system switch to OFF.
2. Remove 15 Amp fuse from control panel.
3. Clean generator as desired.
 • Useadampclothtowipeexteriorsurfacesclean.
 • Useasoft,bristlebrushtoloosencakedondirt,etc.
 • Useavacuumcleanertopickuploosedirtanddebris.
 • Uselowpressureair(nottoexceed25psi)toblow
away dirt. Inspect cooling air slots and openings on
the generator. These openings must be kept clean
andunobstructed.
4. Reinstall 15 Amp fuse in control panel.
5. Set generator’s system switch to AUTO.
6. Reset exercise timer. See Setting Exercise Timer.
NOTICE Improper treatment of generator can damage it
and shorten its life.
• DO NOT expose generator to excessive moisture, dust,
dirt, or corrosive vapors.
• DO NOT insert any objects through cooling slots.
18 BRIGGSandSTRATTON.COM
Engine Maintenance
The maintenance of an engine and related components are
critical to its operating performance and lifespan. Industrial
engines operate in an environment that often include hot
and cold temperatures and extreme dust. The recommended
maintenance schedule is listed in this section, however,
environmental operating conditions and additional installed
equipment may require more frequent inspection and
servicing. The owner and/or authorized service technician
should review the operating conditions of the equipment to
determine the inspection and maintenance intervals. Proper
engine cooling and lubrication are very important, so pay
particular attention to these matters.
Engine Oil
The engine is shipped from the factory pre-run and filled
with non-synthetic oil (API SL 10W-30). This allows for
system operation in a wide range of temperature and
climateconditions.
Oil Recommendation
Select and engine oil viscosity that will best match the
prevailing daytime temperature.
The oil must meet GM specification 9986231. Motor oils
meeting this spec receive the API (American Petroleum
Institure) starburst symbol:
HOT WEATHER
COLD WEATHER
SAE 10W-30
PREFERRED
SAE 15W-40
FOR THE BEST FUEL ECONOMY AND COLD STARTING, SELECT THE LOWEST
SAE VISCOSITY GRADE OIL FOR THE EXPECTED TEMPERATURE RANGE
IF NEITHER SAE 10W-30
NOR SAE 15W-40 GRADE
OILS ARE AVAILABLE, SAE
30 GRADE MAY BE USED AT
TEMPERATURES ABOVE 4
DEGREES C (40F), SAE 40
GRADE AY BE USED AT
TEMPERATURES ABOVE 27
DEGREES C (80F).
DO NOT USE SAE 10W-40
GRADE OIL OR ANY OTHER
GRADE NOT RECOMMENDED
RECOMMENDED SAE VISCOSITY GRADE ENGINE OILS
It is noted that the GF-4 oils are also “backward compatible”
and are equal or better than previous grades of oil in all
aspects.
Synthetic Oils
Synthetic Oils have been available for use in industrial
engines for a relatively long period of time and may offer
advantages in cold and hot temperatures. However, it is not
known if synthetic oils provided operational or economic
benefits over conventional petroleum-based oils in industrial
engines. Use of synthetic oils does not permit the extension
of oil change intervals.
Checking Engine Oil Level
NOTICE: It is important to be careful when checking engine
oil level. Oil must be maintained between the “ADD” and
the “FULL” mark on the dipstick. To ensure that you are not
getting a false reading, make sure the following steps are
taken before checking the oil level.
1. Stop engine.
2. Set control board system switch to OFF.
3. Remove 15 Amp fuse from control panel.
4. Allow approximately five minutes for the oil to drain
back into the oil pan.
5. Remove the dipstick. Wipe with a clean cloth or paper
towel and reinstall. Push the dipstick all the way into the
dipstick tube.
6. Remove the dipstick and note the amount of oil on the
dipstick. The oil level must be between the “ADD” and
“FULL” marks.
7. If the oil level is below the “ADD” mark, reinstall the
dipstick and proceed to step 6.
8. Remove the oil filler cap from the valve cover.
9. Add the required amount of oil to bring the level up to,
but not over, the “FULL” mark on the dipstick. Reinstall
the oil filler cap to the valve rocker arm cover and wipe
any excess oil clean.
19
Changing Engine Oil
KEEP OUT OF REACH OF CHILDREN. DON’T
POLLUTE. CONSERVE RESOURCES. RETURN
USED OIL TO COLLECTION CENTERS.
Change oil while the engine is still warm from running.
1. Set control board system switch to OFF.
2. Remove 15 Amp fuse from control panel.
3. Place oil drain hose (A) into an approved container.
4. Open valve (B) located at bottom of oil pan.
Shown here is the oil drain hose (A) and the oil filter location
(C) for the 30kW generator:
Shown here is the oil drain hose (B) and the oil filter location
(C) for the 45kW generator:
5. When oil has drained, close valve.
6. Add the required amount of oil to bring the level up to,
but not over, the “FULL” mark on the dipstick. Reinstall
the oil filler cap to the valve rocker arm cover and wipe
any excess oil clean
If all engine servicing is complete, replace 15 Amp fuse in
control panel and reset exercise timer. See Setting Exercise
Timer in Operation.
To make the task of adding oil more convenient, we
recommend use of a funnel attached to a length of tubing
long enough to reach from the Coolant Fill door to the oil fill
opening on the engine valve cover.
Engine Coolant System
It is important that the cooling system of the engine be
maintained properly to ensure proper performance and
longevity.
Engine V-Belts
The engine installed in this equipment uses drive belt(s) that
drive the water pump and alternator. The drive belt(s) are an
integral part of the cooling and charging system and should
be inspected according to the maintence schedule. When
inspecting the belts, check for:
 • Cracks
 • Chunkingofthebelt
 • Splits
 • Materialhangingloosefromthebelt
 • Glazing,hardening
If any of these conditions exist, the belt should be replaced.
The cooling system must be maintained according to the
recommended maintenance schedule and inspection should
include:
 • Theregularremovalofdust,dirt,anddebrisfromthe
radiator core and fan shroud.
 • Inspectionofcoolanthosesandcomponentsforleaks,
especially at the radiator hose connections. Tighten
hose clamps if necessary.
 • Checkradiatorhosesforswelling,separation,
hardening, cracks, or any type of deterioration.
 • Inspecttheradiatorcaptoensurepropersealing.
NOTICE: Alcohol or methanol based anti-freeze or plain
water are not recommended for use in the cooling system at
any time.
With the engine cold, check the coolant level in the coolant
recovery bottle (see Controls). Specifications for the coolant
system can be found in the Maintenance chart of this manual.
Coolant Specification - ethylene glycol 50-50 mixture w/
distilled water.
Coolant
WARNING Hot pressurized coolant could cause serious
injury and/or property damage.
• DO NOT open radiator cap when hot.
• Before servicing, allow coolant to cool.
A
C
B
C
A
B
20 BRIGGSandSTRATTON.COM
Generator Electrical System Maintenance
The generator’s electrical system incorporates computers to
control various related components. The electrical system
connections and ground circuits require good connections.
Follow the recommended maintenance schedule located in
the Maintenance section of this manual.
When inspecting the electrical system, check the following:
 • Checkpositive(+)andnegative(-)batterycablesfor
corrosion, rubbing, chafing, burning, and ensure tight
connections at both ends.
 • Checkbatteryforcracksordamagetothecase.Replace
as necessary.
 • Inspectenginewireharnessforrubbing,chafing,
pinching, burning, and cracks or breaks in the wiring.
 • Verifythattheengineharnessconnectorsarecorrectly
locked in.
 • Inspectignitioncoilwireforhardening,cracking,
chafing, burning, separation, and split boot covers.
 • Inspectsparkplugwiresforhardening,cracking,
chafing, burning, separation, and split boot covers.
 • Replacesparkplugsattherequiredintervalsperthe
recommended maintenance schedule.
 • Verifythatallelectricalcomponentsaresecurely
mounted to the engine or chassis.
 • Verifythatanyadditionalelectricalservicesinstalledby
the owner are properly installed in the system.
Engine Air Cleaner
Once each year service the air cleaner, as follows. If
operating in a dusty environment, service more often.
1. Set control board system switch to OFF.
2. Remove 15 Amp fuse from control panel.
3. Remove filter cartridge - Remove the service cover by
disengaging three clips and detaching cover, starting
with the bottom two clips and the top clip last. Gently
move the end of the filter back and forth, then rotate
while pulling straight out.
4. Clean outlet tube and check Vacuator™
valve - Use a clean cloth to wipe the
filter sealing surface and the outlet tube
surfaces. Make sure that all contaminant
is removed before the new filter is
inserted. Be careful to not damage the
sealing area on the tube.
Visually check and physically squeeze Vacuator valve
attached to service cover to make sure it is flexible and
not inverted, damaged orplugged.
5. Clean filter - Use a soft bristle brush to loosen dirt
and a vacuum cleaner to remove dirt and debris. Low
pressure air (not to exceed 25 psi) may also be used to
blow away dirt. Replace filter cartridge if any holes are
detected in filter media.
6. Install clean filter properly - Insert the filter carefully.
Seat the filter by hand, making certain it is completely
into the air cleaner housing before securing the cover
in place. To complete a tight seal, apply pressure by
hand at the outer rim of the filter, not the flexible center.
(Avoid pushing on the center of the urethane end cap.)
No cover pressure is required to hold the seal.
NEVER use the service cover to push the filter into
place! Using the cover to push the filter in could cause
damage to the housing, cover, or fasteners and will void
the warranty. If the service cover hits the filter before
it is fully in place, remove the cover and push the filter
(by hand) further into the air cleaner and try again. The
cover should go on with no extra force.
7. Reinstall service cover - Once the filter is in place,
reinstall the service cover, positioning the cover with
the arrow and the word TOP to the top. Fasten the top
clip first, the bottom two clips last. Make sure that all
mounting bands, clamps, bolts, and connections in the
entire air cleaner system are tight and verify absence of
holes in piping - repair if needed.
8. Replace 15 Amp fuse in control panel.
9. Set control board system switch to ON.
NOTICE Any attempt to crank or start the engine before
it has been properly serviced with the recommended oil
will result in equipment failure.
• Damage to equipment resulting from failure to follow this
instruction will void engine and generator warranty.
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Simplicity 076031-00 Manuel utilisateur

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Taper
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