Usr EV20i User manual

POWER
EV20i

The generator is a potential source of electrical shock if misused. Do
not expose the generator to moisture, rain or snow. Do not let the
generator get wet, and do not operate it with wet hands.
Exhaust contains poisonous carbon monoxide gas that can build up
to dangerous levels in closed areas.
Breathing carbon monoxide can cause unconsciousness or death.
Never run the generator in a closed or even partially closed area
where people may be present.
Keep this owner's manual handy, so you can refer to it at any time.
This owner'smanual is considered a permanent part of the generator
and should remain with the generator if resold.
The information and specifications included in this publication were in
effect at the time of approval for printing.USR power Co., Ltd.
reserves the right, however, to discontinue or change specifications or
design at any time without notice and without incurring any obligation
whatever. No part of this publication may be reproduced without
written permission.
The engine exhaust from this product
contains chemicals known to the State
of California to cause cancer, birth
defects or other reproductive harm.

1
INTRODUCTION
Congratulations on your selection of a USR generator. We are
certain you will be pleased with your purchase of one of the finest
generators on the market.
We want to help you get the best results from your new generator and
to operate it safely. This manual contains the information on how to
do that; please read it carefully.
As you read this manual, you will find information preceded by a
symbol. That information is intended to help you avoid
damage to your generator, other property, or the environment.
When your generator needs scheduled maintenance, keep in mind
that your USR servicing dealer is specially trained in servicing
the generators. Your authorized the servicing dealer is
dedicated to your satisfaction and will be pleased to answer your
questions and concerns.
Best Wishes,
USR Power Co., Ltd.
We suggest you read the
Distributor'sLimited Warranty to fully
understand its coverage and your responsibilities of ownership. The
Distributor'sLimited Warranty is a separate document that should
have been given to you by your dealer.

ʵ
A FEW WORDS ABOUT SAFETY
Safety Labels
Safety Messages
Safety Headings
Safety Section
Instructions
To help you make informed decisions about safety, we have provided
operating procedures and other information on labels and in this
manual. This information alerts you to potential hazards that could
hurt you or others.
Of course, it is not practical or possible to warn you about all the
hazards associated with operating or maintaining a generator. You
must use your own good judgement.
You will find important safety information in a variety of forms,
including:
These signal words mean:
be or if
you don'tfollow instructions.
be or if
you don'tfollow instructions.
be if you don'tfollow instruc-
tions.
Your safety and the safety of others are very important. And using
this generator safely is an important responsibility.
This entire book is filled with important safety information please
read it carefully.
on the generator.
preceded by a safety alert symbol and
one of three signal words, DANGER, WARNING, or CAUTION.
such as
IMPORTANT SAFETY INFORMATION .
such as
how to use this generator correctly and safely.
You WILL KILLED SERIOUSLY HURT
You CAN KILLED SERIOUSLY HURT
You CAN HURT
GENERAT OR SAF ET Y .
-
-
-
-
-
2

3
CONTENTS
..............................................................................GENERATOR SAFETY . 5
.......................................................................Safety Label Locations . 5
............................................................Important Safety Information . 7
..............................................................COMPONENT IDENTIFICATION . 9
..............................................................................................CONTROLS . 11
....................................................................................Engine Switch . 11
........................................................................................Starter Grip . 11
.................................................................Fuel Tank Cap Vent Lever . 12
.......................................................................................Choke Lever . 12
.......................................................................Output Indicator Light . 13
...................................................................Overload Indicator Light . 13
..............................................................................Oil Alert System . 14
...............................................................................Ground Terminal . 14
........................................................................Eco-Throttle Switch . 15
................................................................Parallel Operation Outlets . 15
..........................................................................AC Circuit Protector . 16
....................................................................................DC Receptacle . 16
..........................................................................DC Circuit Protector . 16
...................................................................................GENERATOR USE . 17
..................................Connections to a Building Electrical System . 17
.................................................................................Ground System . 17
.......................................................................Special Requirements . 18
.................................................................................AC Applications . 19
.....................................................................................AC Operation . 20
.................................................AC Parallel Operation Applications . 21
.......................................................................AC Parallel Operation . 23
.....................................................................................DC Operation . 24
......................................................................Eco-Throttle System . 26
....................................................................High Altitude Operation . 27
.......................................................................PRE-OPERATION CHECK . 28
..........................................................................................Engine Oil . 28
............................................................................................Refueling . 30
....................................................................Fuel Recommendations . 32
........................................................................STARTING THE ENGINE . 33
........................................................................STOPPING THE ENGINE . 35
TM
TM

4
......................................................................................MAINTENANCE . 36
......................................................The Importance of Maintenance . 36
..........................................................................Maintenance Safety . 37
............................................Emission Control System Information . 38
.............................................................................................Air Index . 40
.....................................................................Maintenance Schedule . 41
............................................................................Engine Oil Change . 42
...........................................................................Air Cleaner Service . 44
............................................................................Spark Plug Service . 46
............................................................Spark Arrester Maintenance . 48
..................................................................TRANSPORTING/STORAGE . 50
......................................................................................Transporting . 50
...............................................................................................Storage . 51
.............................................................................TROUBLESHOOTING . 54
.................................................................................WIRING DIAGRAM . 56
................................................................INITIAL USE INSTRUCTIONS . 57
.............................................................................Adding Engine Oil . 57
.......................................................................................Adding Fuel . 58
....................................................................................SPECIFICATIONS . 61

5
GENERATOR SAFETY
SAFETY LABEL LOCATIONS
If a label comes off or becomes hard to read, contact your USR
generator dealer for a replacement.
These labels warn you of potential hazards that can cause serious
injury. Read them carefully.

6

7
Carbon Monoxide Hazards
Operator Responsibility
IMPORTANT SAFETY INFORMATION
Be sure that anyone who operates the generator receives proper
instruction. Do not let children operate the generator without
parental supervision.
USR generators are designed to give safe and dependable service if
operated according to instructions. Read and understand this owner's
manual before operating your generator. You can help prevent
accidents by being familiar with your generator'scontrols, and by
observing safe operating procedures.
Know how to stop the generator quickly in case of emergency.
Understand the use of all generator controls, output receptacles,
and connections.
Exhaust contains poisonous carbon monoxide, a colorless and
odorless gas. Breathing carbon monoxide can cause loss of
consciousness and may lead to death.
If you run the generator in an area that is confined, or even partially
enclosed area, the air you breathe could contain a dangerous
amount of exhaust gas.
Never run your generator inside a garage, house or near open
windows or doors.

ʵ
ʵ
ʵ
8
Electric Shock Hazards
Fire and Burn Hazards
Fuel vapors are extremely flammable and may ignite after the
engine has started. Make sure that any spilled fuel has been wiped
up before starting the generator.
Gasoline is extremely flammable and is explosive under certain
conditions. Do not smoke or allow flames or sparks where the
generator is refueled or where gasoline is stored. Refuel in a well-
ventilated area with the engine stopped.
The muffler becomes very hot during operation and remains hot for
a while after stopping the engine. Be careful not to touch the muffler
while it is hot. Let the engine cool before storing the generator
indoors.
Keep the generator at least 3 feet (1 meter) away from buildings
and other equipment during operation.
Do not enclose the generator in any structure.
Keep flammable materials away from the generator.
Never connect different generator models and types.
The generator produces enough electric power to cause a serious
shock or electrocution if misused.
Using a generator or electrical appliance in wet conditions, such as
rain or snow, or near a pool or sprinkler system, or when your hands
are wet, could result in electr ocution. Keep the generator dry.
If the generator is stored outdoors, unprotected from the weather,
check all of the electrical components on the control panel before
each use. Moisture or ice can cause a malfunction or short circuit in
electrical components which could result in electrocution.
Do not connect to a building electrical system unless an isolation
switch has been installed by a qualified electrician.
Use only a USR approved parallel operation kit (optional
equipment) when connecting two generators for parallel operation.
The exhaust system gets hot enough to ignite some materials.

9
COMPONENT IDENTIFICATION
PARALLEL OPERATION OUTLETS
OVERLOAD INDICATOR LIGHT
OUTPUT INDICATOR LIGHT
FUEL TANK CAP VENT LEVER
FUEL TANK CAP
AC RECEPTACLES
GROUND TERMINAL
DC CIRCUIT PROTECTOR
DC RECEPTACLE
MAINTENANCE COVER
AC CIRCUIT PROTECTOR
CHOKE LEVER
ENGINE SWITCH
OIL ALERT INDICATOR LIGHT
STARTER GRIP
ECO-THROTTLE SWITCH
TM

10
SPARK PLUG MAINTENANCE COVER
SPARK PLUG
MUFFLER
AIR CLEANER
FRAME SERIAL NUMBER
Record the frame serial number for your future reference. Refer to this
serial number when ordering parts, and when making technical or
warranty inquiries (see page ).
Frame serial number:
Date purchased:
62

11
CONTROLS
ENGINE SWITCH
STARTER GRIP
Switch position:
OFF:
ON:
OOFFFF
OONN
ENGINE SWITCH
STARTER GRIP
DDiirreeccttiioonnttooppuullll
To start and stop the engine.
To stop the engine.
To start and run the engine.
Do not allow the starter grip to snap back against the engine. Return it
gently to prevent damage to the starter.
To start the engine, pull the starter grip lightly until you feel resistance,
then pull briskly in the direction of the arrow as shown below.

12
FUEL TANK CAP VENT LEVER
CHOKE LEVER
CHOKE LEVER
OOPPEENN
OONN
OOFFFF
FUEL TANK CAP VENT LEVER
CLOSED
FUEL TANK CAP VENT LEVER
OONN
OOFFFF
NON-CALIFORNIA TYPE CALIFORNIA TYPE
The fuel tank cap is provided with a vent lever to seal the fuel tank.
The vent lever must be in the ON position for the engine to run.
The choke is used to provide proper starting mixture when the engine
is cold. It can be opened and closed by operating the choke lever
manually. Move the choke lever to the CLOSED position to enrich the
mixture for cold starting.
When the engine is not in use, leave the vent lever in the OFF position
to reduce the possibility of fuel leakage. Allow the engine to cool well
before turning the vent lever to the OFF position.

13
OUTPUT INDICATOR LIGHT
OVERLOAD INDICATOR LIGHT
OVERLOAD INDICATOR
LIGHT (RED)
OUTPUT INDICATOR
LIGHT (GREEN)
The output indicator light (green) is illuminated when the generator is
operating normally. It indicates that the generator is producing
electrical power at the receptacles.
If the generator is overloaded (in excess of 2,000 VA), or if there is a
short circuit in a connected appliance, the overload indicator light (red)
will go ON. The overload indicator light (red) will stay ON, and after
about four seconds, current to the connected appliance(s) will shut off,
and the output indicator light (green) will go OFF.

14
OIL ALERT SYSTEM
GROUND TERMINAL
GROUND TERMINAL
OIL ALERT INDICATOR
LIGHT (RED)
The generator ground terminal is connected to the frame of the
generator, the metal non-current-carrying parts of the generator, and
the ground terminals of each receptacle.
Before using the ground terminal, consult a qualified electrician,
electrical inspector or local agency having jurisdiction for local codes
or ordinances that apply to the intended use of the generator.
If the engine stops or the Oil Alert indicator light comes on when you
pull the starter grip, check the engine oil level (see page ) before
troubleshooting in other areas.
The Oil Alert system is designed to prevent engine damage caused
by an insufficient amount of oil in the crankcase. Before the oil level in
the crankcase can fall below a safe limit, the Oil Alert indicator light
comes on and the Oil Alert system automatically will stop the engine
(the engine switch will remain in the ON position).
28

15
PARALLEL OPERATION OUTLETS
ECO-THROTTLE SWITCH
ON:
OFF:
OOFFFF
PARALLEL OPERATION OUTLETS
OONN
ECO-THROTTLE SWITCH
The Eco-Throttle system automatically reduces engine speed when
all loads are turned off or disconnected. When appliances are turned
on or reconnected, the engine returns to the proper speed to power
the electrical load.
If high electrical loads are connected simultaneously, turn the Eco-
Throttle switch to the OFF position to reduce voltage changes.
When using the DC output, turn the Eco-Throttle switch to the OFF
position.
Recommended to minimize fuel consumption and further
reduce noise levels when no load is applied to the generator.
The Eco-Throttle system does not operate.
These outlets are used for connecting two generators for
parallel operation (see page ). A USR approved parallel operation
kit (optional equipment) is required for parallel operation. This kit can
be purchased from an authorized USR generator dealer.
23

16
AC CIRCUIT PROTECTOR
DC RECEPTACLE
DC CIRCUIT PROTECTOR
PUSH
AC CIRCUIT PROTECTOR
AC RECEPTACLES
AC CIRCUIT PROTECTOR
ON
OFF
ON
OFF
DC CIRCUIT PROTECTOR
DC RECEPTACLE
PUSH
The AC circuit protector will automatically switch OFF if there is a short
circuit or a significant overload of the generator at the AC receptacles.
If the circuit protector switches OFF automatically, check that the
appliance is working properly and does not exceed the rated load
capacity of the circuit before resetting the circuit protector ON.
The DC circuit protector automatically shuts off the DC battery
charging circuit when the DC charging circuit is overloaded, when
there is a problem with the battery, or when the connections between
the battery and the generator are improper.
The DC receptacle should ONLY be used for charging 12-volt
automotive type batteries. The DC charging output is not regulated.

17
GENERATOR USE
CONNECTIONS TO A BUILDING ELECTRICAL SYSTEM
Improper connections to a building electrical system can allow
electrical current from the generator to backfeed into the utility lines.
Such backfeed may electroc ute utility company workers or others
who contact the lines during a power outage, and the generator may
explode, burn, or cause fires when utility power is restored. Consult
the utility company or a qualified electrician.
GROUND SYSTEM
Connections for standby power to a building electrical system must be
made by a qualified electrician. The connection must isolate the
generator power from utility power, and must comply with all
applicable laws and electrical codes.
USR portable generators have a system ground that connects
generator frame components to the ground terminals in the AC output
receptacles. The system ground is not connected to the AC neutral
wire. If the generator is tested by a receptacle tester, it will not show
the same ground circuit condition as for a home receptacle.

18
SPECIAL REQUIREMENTS
Do not lay the generator on its side when moving, storing, or
operating it. Oil may leak and damage the engine or your property.
There may be Federal or State Occupational Safety and Health
Administration (OSHA) regulations, local codes, or ordinances that
apply to the intended use of the generator. Please consult a qualified
electrician, electrical inspector, or the local agency having jurisdiction.
In some areas, generators are required to be registered with local
utility companies.
If the generator is used at a construction site, there may be
additional regulations that must be observed.
Keep all cooling holes open and clear of debris, mud, water, etc.
Cooling holes are located on the side panel, the control panel, and the
bottom of the generator. If the cooling holes are blocked, the
generator may overheat and damage the engine, inverter, or windings.