Generac Power Systems 45kW User manual

STATIONARY EMERGENCY GENERATOR
OWNER'S MANUAL
This manual should remain with the unit.
A new standard of reliability
Serial Number 2.4L
45kW Models
EPA Certified
with Catalyst
Not intended for use in critical life support applications. 
ONLY QUALIFIED ELECTRICIANS OR CONTRACTORS SHOULD ATTEMPT INSTALLATION!
DEADLY EXHAUST FUMES. OUTDOOR INSTALLATION ONLY!
—CAUTION—
Cover185 Rev. A 09/09 Part No. 0H4987

Stationary Emergency Generator
Table of Contents
SECTION PAGE
INTRODUCTION...............................................................................1-1
Read this Manual Thoroughly.......................................................1-1
Operation and Maintenance..........................................................1-1
How to Obtain Service .................................................................1-1
SAFETY RULES ...............................................................................1-2
IDENTIFICATION RECORD ...............................................................2-1
Data Label ...................................................................................2-1
EQUIPMENT DESCRIPTION .............................................................3-1
Equipment Description .....................................................................3-1
Engine Oil Recommendations...........................................................3-1
Coolant Recommendations ..............................................................3-1
ENGINE PROTECTIVE DEVICES .......................................................4-1
Engine Protective Devices ................................................................4-1
High Coolant Temperature Switch.................................................4-1
Low Coolant Level Sensor............................................................4-1
Low Oil Pressure Switch ..............................................................4-1
Overcrank Shutdown....................................................................4-1
Overspeed Shutdown ...................................................................4-1
RPM Sensor Loss Shutdown........................................................4-1
DC Fuses.....................................................................................4-1
FUEL SYSTEMS ..............................................................................5-1
Fuel Requirements .......................................................................5-1
Natural Gas Fuel System ..............................................................5-1
Propane Vapor Withdrawal Fuel System........................................5-1
LP Liquid Fuel System..................................................................5-1
SPECIFICATIONS.............................................................................6-1
Stationary Emergency Generator ..................................................6-1
Engine .........................................................................................6-1
Cooling System............................................................................6-1
Fuel System.................................................................................6-1
Electrical System .........................................................................6-1
Cold Weather Kit..........................................................................6-2
Coolant Heater Kit ........................................................................6-2
Reconfiguring the Fuel System .........................................................6-2
Fuel System.................................................................................6-2
Control Panel ...............................................................................6-3
GENERAL INFORMATION.................................................................7-1
Alternator AC Lead Connections.......................................................7-1
Four-lead, Single-phase Stator......................................................7-1
Alternator Power Winding Connections.............................................7-1
3-phase Alternators......................................................................7-1
3-phase Alternators ("Delta" Configuration)...................................7-2
INSTALLATION ................................................................................8-1
Installation .......................................................................................8-1
Preparation Before Start-up..............................................................8-1
Transfer Switch............................................................................8-1
Fuel System.................................................................................8-1
Generator Set Lubrication.............................................................8-1
Prior to Initial Start-up..................................................................8-1
Engine Coolant.............................................................................8-1
Belt Tension .................................................................................8-1
Electrical System .........................................................................8-1
Initial Inspection for Genset Start-up ................................................8-1
Start-up Checklist ............................................................................8-2
Preparation for Start-up................................................................8-2
OPERATION ..................................................................................... 9-1
Stationary Emergency Generator Control and Operation....................9-1
Operating Unit with Manual Transfer Switch......................................9-1
Engine Start-up and Transfer........................................................9-1
Retransfer and Shutdown.............................................................9-1
Operating Unit with Automatic Transfer Switch .................................9-1
MAINTENANCE..............................................................................10-1
Maintenance Performed by Service Dealers/Contractors.................10-1
Every Three Months...................................................................10-1
Once Every Six Months..............................................................10-1
Once Annually............................................................................10-1
First 30 Operating Hours ............................................................10-1
First 100 Operating Hours ..........................................................10-1
Every 500 Operating Hours ........................................................10-1
Cooling System..............................................................................10-1
Overload Protection for Engine DC Electrical System ......................10-1
Checking Fluid Levels.....................................................................10-1
Check Engine Oil........................................................................10-1
Battery Fluid...............................................................................10-2
Engine Coolant...........................................................................10-2
Maintenance Owner/Operator Can Perform.....................................10-2
Check Engine Oil Level...............................................................10-2
Check Battery ............................................................................10-2
Exercise System ........................................................................10-2
Inspect Cooling System .............................................................10-2
Check Engine Coolant Level .......................................................10-2
Perform Visual Inspection ..........................................................10-2
Inspect Exhaust System.............................................................10-2
Check Fan Belt...........................................................................10-2
Inspect Engine Governor ............................................................10-3
Changing Engine Oil...................................................................10-3
Changing the Engine Air Filter.....................................................10-3
Spark Plugs ...............................................................................10-4
Coolant Change .........................................................................10-4
Miscellaneous Maintenance ...........................................................10-4
Cleaning the Stationary Emergency Generator ............................10-4
Battery.......................................................................................10-4
Battery Maintenance ..................................................................10-4
Battery Replacement..................................................................10-5
Repair Parts...................................................................................10-5
SERVICE SCHEDULE .....................................................................11-1
TROUBLESHOOTING .....................................................................12-1
Troubleshooting Guide....................................................................12-1
EMISSIONS WARRANTY ...............................................................13-1
NOTES
EXPLODED VIEWS & PARTS LISTS
WIRING DIAGRAMS & SCHEMATICS
Content038 Rev. A 02/09

INTRODUCTION
Thank you for purchasing this model of the stationary emergency
generator product line.
Every effort was expended to make sure that the information and
instructions in this manual were both accurate and current at the
time the manual was written. However, the manufacturer reserves
the right to change, alter or otherwise improve this product(s) at
any time without prior notice.
READ THIS MANUAL THOROUGHLY
If any portion of this manual is not understood, contact the nearest
Service Dealer for starting, operating and servicing procedures.
Throughout this publication, and on tags and decals affixed to the
generator, DANGER, WARNING, CAUTION and NOTE blocks are
used to alert personnel to special instructions about a particular
service or operation that may be hazardous if performed incor-
rectly or carelessly. Observe them carefully. Their definitions are
as follows:
INDICATES A HAZARDOUS SITUATION OR ACTION WHICH, IF
NOT AVOIDED, WILL RESULT IN DEATH OR SERIOUS INJURY.
Indicates a hazardous situation or action which, if not
avoided, could result in death or serious injury.
Indicates a hazardous situation or action which, if not
avoided, could result in minor or moderate injury.
NOTE:
Notes contain additional information important to a procedure
and will be found within the regular text body of this manual.
These safety warnings cannot eliminate the hazards that they
indicate. Common sense and strict compliance with the special
instructions while performing the service are essential to prevent-
ing accidents.
Four commonly used safety symbols accompany the DANGER,
WARNING and CAUTION blocks. The type of information each
indicates is as follows:
nThis symbol points out important safety information that,
if not followed, could endanger personal safety and/or
property of others.

This symbol points out potential explosion hazard.
This symbol points out potential fire hazard.
This symbol points out potential electrical shock hazard.
The operator is responsible for proper and safe use of the equip-
ment. The manufacturer strongly recommends that the operator
read this Owner's Manual and thoroughly understand all instruc-
tions 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.
For safety reasons, the manufacturer recommends that this
equipment be installed, serviced and repaired by a Service
Dealer or other competent, qualified electrician or installation
technician who is familiar with applicable codes, standards and
regulations. The operator also must comply with all such codes,
standards and regulations.
OPERATION AND MAINTENANCE
It is the operator's responsibility to perform all safety checks, to
make sure that all maintenance for safe operation is performed
promptly, and to have the equipment checked periodically by a
Service Dealer. Normal maintenance service and replacement of
parts are the responsibility of the owner/operator and, as such,
are not considered defects in materials or workmanship within the
terms of the warranty. Individual operating habits and usage con-
tribute to the need for maintenance service.
Proper maintenance and care of the generator ensure a minimum
number of problems and keep operating expenses at a minimum.
See a Service Dealer for service aids and accessories.
Operating instructions presented in this manual assume that the
generator electric system has been installed by a Service Dealer or
other competent, qualified contractor. Installation of this equipment
is not a “do-it-yourself” project.
HOW TO OBTAIN SERVICE
When the generator requires servicing or repairs, simply contact
a Service Dealer for assistance. Service technicians are factory-
trained and are capable of handling all service needs.
When contacting a dealer about parts and service, always supply
the complete Model Number, Serial Number and Type Code (where
applicable) from the DATA LABEL that is affixed to the unit.
1-1
Safety004 Rev. F 05/10
Safety Instructions
n
SAVE THESE INSTRUCTIONS – The manufacturer suggests that these rules for safe operation be copied and posted in potential
hazard areas. Safety should be stressed to all operators, potential operators, and service and repair technicians for this
equipment.

SAFETY RULES
Study these SAFETY RULES carefully before installing, operating
or servicing this equipment. Become familiar with this Owner’s
Manual and with the unit. The generator can operate safely, effi-
ciently 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.
The manufacturer cannot anticipate every possible circumstance
that might involve a hazard. The warnings in this manual, and on
tags and decals affixed to the unit are, therefore, not all inclusive.
If a procedure, work method or operating technique is used that
the manufacturer does not specifically recommend, ensure that it
is safe for others. Also make sure the procedure, work method or
operating technique utilized does not render the generator unsafe.
n
Despite the safe design of this generator,
operating this equipment imprudently, neglect-
ing its maintenance or being careless can cause
possible injury or death. Permit only respon-
sible and capable persons to install, operate or
maintain this equipment.

Potentially lethal voltages are generated by
these machines. Ensure all steps are taken to
render the machine safe before attempting to
work on the generator.
n
Parts of the generator are rotating and/or hot
during operation. Exercise care near running
generators.
GENERAL HAZARDS
For safety reasons, the manufacturer recommends that this•
equipment be installed, serviced and repaired by a Service
Dealer or other competent, qualified electrician or installation
technician who is familiar with applicable codes, standards
and regulations. The operator also must comply with all such
codes, standards and regulations.
Installation, operation, servicing and repair of this (and related)•
equipment must always comply with applicable codes, stan-
dards, laws and regulations. Adhere strictly to local, state and
national electrical and building codes. Comply with regulations
the Occupational Safety and Health Administration (OSHA) has
established. Also, ensure that the generator is installed, operat-
ed and serviced in accordance with the manufacturer’s instruc-
tions and recommendations. Following installation, do nothing
that might render the unit unsafe or in noncompliance with the
aforementioned codes, standards, laws and regulations.
The engine exhaust fumes contain carbon monoxide gas, which•
can be DEADLY. This dangerous gas, if breathed in sufficient
concentrations, can cause unconsciousness or even death. For
that reason, adequate ventilation must be provided. This should
be considered prior to installing the generator. The unit should
be positioned to direct exhaust gasses safely away from any
building where people, animals, etc., will not be harmed. Any
exhaust stacks that ship loose with the unit must be installed
properly per the manufacturer's instruction, and in strict compli-
ance with applicable codes and standards.
Keep hands, feet, clothing, etc., away from drive belts, fans,•
and other moving or hot parts. Never remove any drive belt or
fan guard while the unit is operating.
Adequate, unobstructed flow of cooling and ventilating air is•
critical in any room or building housing the generator to prevent
buildup of explosive gases and to ensure correct generator
operation. Do not alter the installation or permit even partial
blockage of ventilation provisions, as this can seriously affect
safe operation of the generator.
Keep the area around the generator clean and uncluttered.•
Remove any materials that could become hazardous.
When working on this equipment, remain alert at all times.•
Never work on the equipment when physically or mentally
fatigued.
Inspect the generator regularly, and promptly repair or replace•
all worn, damaged or defective parts using only factory-
approved parts.
Before performing any maintenance on the generator, discon-•
nect its battery cables to prevent accidental start-up. Disconnect
the cable from the battery post indicated by a NEGATIVE, NEG
or (–) first. Reconnect that cable last.
Never use the generator or any of its parts as a step. Stepping•
on the unit can stress and break parts, and may result in dan-
gerous operating conditions from leaking exhaust gases, fuel
leakage, oil leakage, etc.
ELECTRICAL HAZARDS
All stationary emergency generators covered by this manual•
produce dangerous electrical voltages and can cause fatal
electrical shock. Utility power delivers extremely high and dan-
gerous voltages to the transfer switch as well as the generator.
Avoid contact with bare wires, terminals, connections, etc.,
on the generator as well as the transfer switch, if applicable.
Ensure all appropriate covers, guards and barriers are in place
before operating the generator. If work must be done around
an operating unit, stand on an insulated, dry surface to reduce
shock hazard.
Do not handle any kind of electrical device while stand-•
ing in water, while barefoot, or while hands or feet are wet.
DANGEROUS ELECTRICAL SHOCK MAY RESULT.
1-2
Safety004 Rev. F 05/10
Safety Instructions

If personnel must stand on metal or concrete while installing,•
operating, servicing, adjusting or repairing this equipment,
place insulative mats over a dry wooden platform. Work on the
equipment only while standing on such insulative mats.
The National Electrical Code (NEC) requires the frame and•
external electrically conductive parts of the generator to be con-
nected to an approved earth ground. This grounding will help
prevent dangerous electrical shock that might be caused by a
ground fault condition in the generator or by static electricity.
Never disconnect the ground wire.
Wire gauge sizes of electrical wiring, cables and cord sets must•
be adequate to handle the maximum electrical current (ampac-
ity) to which they will be subjected.
Before installing or servicing this (and related) equipment, make•
sure that all power voltage supplies are positively turned off at
their source. Failure to do so will result in hazardous and pos-
sibly fatal electrical shock.
Connecting this unit to an electrical system normally supplied•
by an electric utility shall be by means of a transfer switch so as
to isolate the generator electric system from the electric utility
distribution system when the generator is operating. Failure to
isolate the two electric system power sources from each other
by such means will result in damage to the generator and may
also result in injury or death to utility power workers due to
backfeed of electrical energy.
Stationary emergency generators installed with an automatic•
transfer switch will crank and start automatically when normal
(utility) source voltage is removed or is below an acceptable
preset level. To prevent such automatic start-up and possible
injury to personnel, disable the generator’s automatic start cir-
cuit (battery cables, etc.) before working on or around the unit.
Then, place a “Do Not Operate” tag on the generator control
panel and on the transfer switch.
In case of accident caused by electric shock, immediately•
shut down the source of electrical power. If this is not pos-
sible, attempt to free the victim from the live conductor. AVOID
DIRECT CONTACT WITH THE VICTIM. Use a nonconducting
implement, such as a dry rope or board, to free the victim from
the live conductor. If the victim is unconscious, apply first aid
and get immediate medical help.
Never wear jewelry when working on this equipment. Jewelry•
can conduct electricity resulting in electric shock, or may get
caught in moving components causing injury.
FIRE HAZARDS
Keep a fire extinguisher near the generator at all times. Do NOT•
use any carbon tetra-chloride type extinguisher. Its fumes are
toxic, and the liquid can deteriorate wiring insulation. Keep the
extinguisher properly charged and be familiar with its use. If
there are any questions pertaining to fire extinguishers, consult
the local fire department.
EXPLOSION HAZARDS
Properly ventilate any room or building housing the generator to•
prevent build-up of explosive gas.
Do not smoke around the generator. Wipe up any fuel or oil•
spills immediately. Ensure that no combustible materials are left
in the generator compartment, or on or near the generator, as
FIRE or EXPLOSION may result. Keep the area surrounding the
generator clean and free from debris.
These generators may operate using one of several types•
of fuels. All fuel types are potentially FLAMMABLE and/or
EXPLOSIVE and should be handled with care. Comply with all
laws regulating the storage and handling of fuels. Inspect the
unit’s fuel system frequently and correct any leaks immediately.
Fuel supply lines must be properly installed, purged and leak
tested according to applicable fuel-gas codes before placing
this equipment into service.
Diesel fuels are highly FLAMMABLE. Gaseous fluids such•
as natural gas and liquid propane (LP) gas are extremely
EXPLOSIVE. Natural gas is lighter than air, and LP gas is heavier
than air; install leak detectors accordingly.
1-3
Safety004 Rev. F 05/10
Safety Instructions
CALIFORNIA PROPOSITION 65 WARNING
Engine exhaust and some of its constituents are known
to the State of California to cause cancer, birth defects
and other reproductive harm.
CALIFORNIA PROPOSITION 65 WARNING
This product contains or emits chemicals known to the
State of California to cause cancer, birth defects and
other reproductive harm.

IDENTIFICATION RECORD
DATA LABEL
Every generator set includes DATA LABEL that contains important
information pertinent to the generator. The data label is attached to
the lower connection box on the generator and lists the unit serial
number, rated voltage, amps, wattage capacity, phase, frequency,
rpm, power factor, and production date.
NOTE:
For actual information related to this particular model, please
refer to the Manual Drawing Listing located at the end of this
manual, or to the data label affixed to the unit.
Stationary Emergency Generator Model and Serial
Number
This number is the key to numerous engineering and manufactur-
ing details pertaining to your unit. Always supply this number
when requesting service, ordering parts or seeking information.
2-1
Identy005 Rev. E 04/15
General Information
Data Label

EQUIPMENT DESCRIPTION
This equipment is a revolving field, alternating current Stationary
Emergency Generator. It is powered by a gaseous fueled engine
operating at 1800 rpm for 4-pole direct drive units, 3600 rpm for
2-pole direct drive units and 2300 - 3000 rpm for quiet drive gear
units. See the Specifications section for exact numbers. The unit
comes complete with a sound attenuated enclosure, internally
mounted muffler, control console, mainline circuit breaker, bat-
tery charger, and protective alarms as explained in the following
paragraph.
All AC connections, including the power leads from the alterna-
tor, 120 volt battery charger input and control connections to the
transfer switch are available in the main connection box.
The Stationary Emergency Generator incorporates the following
alternator features:
Rotor and Stator insulation class is rated as defined by NEMA•
MG1-32.6, NEMA MG1-1.66. The generator is self ventilated
and drip-proof constructed. Refer to the Specifications section
or the data label for the class ratings.
The voltage waveform deviation, total harmonic content of the•
AC waveform and telephone influence factor have been evalu-
ated and are acceptable according to NEMA MG1-32.
ENGINE OIL RECOMMENDATIONS
The unit has been filled with 5W-20 engine oil at the factory. Use
a high-quality detergent oil classified “For Service SJ or SH.”
Detergent oils keep the engine cleaner and reduce carbon deposits.
When changing the engine oil, be sure to use 5W-30 engine oil.
n
Any attempt to crank or start the engine before
it has been properly serviced with the recom-
mended oil may result in an engine failure.
NOTE:
If not already equipped, it is strongly recommended to use the
optional Cold Weather Start Kit for temperatures below 32° F.
The part number for the Cold Weather Start Kit can be found
in the Specifications section or by contacting an authorized
dealer. The oil grade for temperatures below 32° F is 5W-30
synthetic oil.
COOLANT RECOMMENDATIONS
Use a mixture of half low silicate ethylene glycol base anti-freeze
and deionized water. Cooling system capacity is listed in the
specifications. Use only deionized water and only low silicate
anti-freeze. If desired, add a high quality rust inhibitor to the rec-
ommended coolant mixture. When adding coolant, always add the
recommended 50-50 mixture.
n
Do not use any chromate base rust inhibitor
with ethylene glycol base anti-freeze or chro-
mium hydroxide (“green slime”) forms and will
cause overheating. Engines that have been
operated with a chromate base rust inhibitor
must be chemically cleaned before adding eth-
ylene glycol base anti-freeze. Using any high
silicate anti-freeze boosters or additives will
also cause overheating. The manufacturer also
recommends that any soluble oil inhibitor is
NOT used for this equipment.
n
Do not remove the radiator pressure cap while
the engine is hot or serious burns from boiling
liquid or steam could result.
n
Ethylene glycol base antifreeze is poisonous.
Do not use mouth to siphon coolant from the
radiator, recovery bottle or any container. Wash
hands thoroughly after handling. Never store
used antifreeze in an open container because
animals are attracted to the smell and taste of
antifreeze even though it is poisonous to them.
3-1
Equip001 Rev. G 05/10
Equipment Description

ENGINE PROTECTIVE DEVICES
The Stationary Emergency Generator may be required
to operate for long periods of time without an opera-
tor on hand to monitor such engine conditions as
coolant temperature, oil pressure or rpm. For that
reason, the engine has several devices designed to
protect it against potentially damaging conditions by
automatically shutting down the unit when the oil
pressure is too low, the coolant temperature is too
high, the coolant level is too low, or the engine is run-
ning too fast.
NOTE:
Engine protective switches and sensors are men-
tioned here for the reader’s convenience. Also
refer to the applicable control panel manual for
additional automatic engine shutdown informa-
tion.
HIGH COOLANT TEMPERATURE SWITCH
The switch will close if the temperature should
exceed approximately 140° C (284° F), initiating an
engine shutdown. The generator will automatically
restart and the LED will reset once the temperature
has returned to a safe operating level.
LOW COOLANT LEVEL SENSOR
To prevent overheating, the engine has a low coolant
level sensor. If the level of engine coolant drops below
the level of the low coolant level sensor, the engine
automatically shuts down.
LOW OIL PRESSURE SWITCH
This switch has normally closed contacts that are
held open by engine oil pressure during cranking and
operating. Should oil pressure drop below the 8 psi
range, switch contacts close, and the engine shuts
down. The unit should not be restarted until oil is
added, and the AUTO/OFF/MANUAL switch must be
turned to OFF and then back to AUTO.
OVERCRANK SHUTDOWN
After a prespecified duration of cranking, this func-
tion ends the cranking if the engine has failed to
start. The overcrank LED will turn ON. Turn OFF the
AUTO/OFF/MANUAL switch, then turn switch back to
AUTO to reset the generator control board.
NOTE:
If the fault is not corrected, the overcrank feature
will continue to activate.
Approximate Crank Cycle Times
• 15 seconds ON
• 7 seconds OFF
• 7 seconds ON
• 7 seconds OFF
• Repeat for 45 seconds
Approximately 90 seconds total.
OVERSPEED SHUTDOWN
A speed circuit controls engine cranking, start-up,
operation and shutdown. Engine speed signals are
delivered to the circuit board whenever the unit is
running. Should the engine overspeed above a safe,
preset value, the circuit board initiates an automatic
engine shutdown. Contact the nearest Authorized
Dealer if this failure occurs.
RPM SENSOR LOSS SHUTDOWN
If the speed signal to the control panel is lost, engine
shutdown will occur.
DC FUSES
Fuse F1 (15 amp) is located inside of the control
panel. It protects the panel wiring and components
from damaging overload. Always remove this fuse
before commencing work on the generator. The
unit will not start or crank if the fuse is blown.
Fuse F2 (25 amp) is located in the engine wire har-
ness adjacent to the DC alternator. It is used to pre-
vent circuit failure due to DC alternator falure. If this
fuse is blown, battery charging will not occur while
the engine is running. Replace these fuses with the
same size, type, and rating. (See the exploded views
and parts lists at the end of this manual for replace-
ment part number.)
4-1
Stationary Emergency Generator
Engine Protective Devices
EngProt001 Rev. B 09/08

FUEL SYSTEM
FUEL REQUIREMENTS
The Stationary Emergency Generator may be equipped with one of
the following fuel systems:
• Natural gas fuel system
• Propane vapor (LPV) fuel system
Recommended fuels should have a Btu content of at least 1,000
Btu's per cubic foot for natural gas; or at least 2,520 Btu's per
cubic foot for LP gas. Ask the fuel supplier for the Btu content of
the fuel.
NOTE:
The fuel consumption requirements are identified in the
Specifications section of the Owner's Manual. Refer to the
Installation Manual if assistance is required for the sizing of
the pipe diameter for the generator. Any piping used to connect
the generator to the fuel supply should be of adequate size to
achieve the 100% load fuel consumption requirements identi-
fied in the Specifications section regardless of actual load.
NOTE:
The recommended fuel pressure is identified in the Specifications
section this manual.
NOTE:
It is the responsibility of the installer to make sure that only
the correct recommended fuel is supplied to the generator fuel
system. Thereafter, the owner/operator must make certain that
only the proper fuel is supplied.
NATURAL GAS FUEL SYSTEM
Natural gas is supplied in its vapor state. In most cases, the gas
distribution company provides piping from the main gas distribu-
tion line to the standby generator site. The following information
applies to natural gas fuel systems.
• Gas pressure in a building is usually regulated by national, state
and local codes.
• To reduce gas pressure to a safe level before the gas enters a
building, a primary regulator is needed. The natural gas supplier
may or may not supply such a regulator.
• It is the responsibility of the gas supplier to make sure sufficient
gas pressure is available to operate the primary regulator.
• Gas pressure at the inlet to the fuel shutoff solenoid must never
exceed approximately 14 inches water column (0.5 psi).
PROPANE VAPOR WITHDRAWAL FUEL SYSTEM
This type of system utilizes the vapors formed above the liquid
fuel in the supply tank. Approximately 10 to 20 percent of the tank
capacity is needed for fuel expansion from the liquid to the vapor
state. The vapor withdrawal system is generally best suited for
smaller engines that require less fuel. The installer should be aware
of the following:
• When ambient temperatures are low and engine fuel consump-
tion is high, the vapor withdrawal system may not function
efficiently.
• Ambient temperatures around the supply tank must be high
enough to sustain adequate vaporization, or the system will not
deliver the needed fuel volume.
• In addition to the cooling effects of ambient air, the vaporization
process itself provides an additional cooling effect.
5-1
FuelSys001 Rev. F 04/11
Fuel System

SPECIFICATIONS
STATIONARY EMERGENCY GENERATOR
Type......................................................................Synchronous
Rotor Insulation.............................................................Class H
Stator Insulation............................................................Class H
Total Harmonic Distortion..................................................<5%
Telephone Interference Factor (TIF) ..................................< 50
Alternator Output Leads 3-phase.....................................4-wire
Bearings..................................................................Sealed Ball
Coupling................................................................Flexible Disc
Load Capacity (Standby Rating).....................................45kW*
*NOTE: Generator rating and performance in accordance with ISO8528-5, BS5514, SAE
J1349, ISO3046 and DIN 6271 Standards. KW rating is based on LPG fuel and may derate
with natural gas.
Excitation System ............................................................Direct
Generator Output Voltage/kW - 60 Hz kW Amp CB Size
120/240V, 1-phase, 1.0 pf 45 188 200
120/208V, 3-phase, 0.8 pf 45 156 175
277/480V, 3-phase, 0.8 pf 45 68 80
Generator Locked Rotor KVA Available @ Voltage Dip of 35%
Single-phase or 208, 3-phase (45kW) ........................72 KVA
480V, 3-phase (45kW)................................................80 KVA
ENGINE
Make...........................................................................Generac
Model.............................................................................In Line
Cylinders and Arrangement.....................................................4
Displacement...............................................................2.4 Liter
Bore..............................................................................3.41 in.
Stroke...........................................................................3.94 in.
Compression Ratio.......................................................9.5-to-1
Air Intake System.........................................Naturally Aspirated
Valve Seats................................................................Hardened
Lifter Type.................................................................. Hydraulic
Engine Parameters
Rated Synchronous RPM.......................................60 Hz, 3600
Gross HP at rated kW (NG/LP)........................................ 80-92
Exhaust System
Exhaust Flow at Rated Output 60 Hz (45kW)................420 cfm
Exhaust Temp. at Rated Output (45kW).........................1100° F
Combustion Air Requirements (Natural Gas)
Flow at rated power, 60 Hz (45kW)..............................144 cfm
Governor
Type...........................................................................Electronic
Frequency Regulation.............................................Isochronous
Steady State Regulation..............................................± 0.25%
Engine Lubrication System
Type of Oil Pump ...............................................................Gear
Oil Filter.........................................Full Flow Spin-on, Cartridge
Crankcase Oil Capacity...........................................5.25 U.S. qts.
(including filter capacity)
COOLING SYSTEM
Type.............................................Pressurized Closed Recovery
Water Pump.............................................................Belt Driven
Fan Speed..................................................................2150 rpm
Fan Diameter..............................................................22 inches
Fan Mode.........................................................................Puller
Air Flow (inlet air including alternator and
combustion air).................................................2725 ft3/min.
Coolant Capacity.................................................(3.0 U.S. gal.)
Heat Rejection to Coolant (45kW).......................193,000 Btu/h
Maximum Operating Air Temp. on Radiator.........60° C (150° F)
Maximum Ambient Temperature.........................50° C (140° F)
FUEL SYSTEM
Type of Fuel....................................Natural Gas, Propane Vapor
Carburetor............................................................... Down Draft
Secondary Fuel Regulator............................................Standard
Fuel Shut-off Solenoid.................................................Standard
Operating Fuel Pressure .................5 in. - 14 in. Water Column
Fuel Consumption - ft3/hr (Natural Gas/LPV)
Exercise 25% 50% 75% 100%
Cycle Load Load Load Load
45kW 65/25 210/83 380/151 545/216 730/290
ELECTRICAL SYSTEM
Battery Charge Alternator......................................12V, 30 Amp
Static Battery Charger..................................................2.5 Amp
Recommended Battery.................................Group 26, 525CCA
System Voltage............................................................12 Volts
Voltage Regulator
Type...........................................................................Electronic
Sensing ................................................................Single-phase
Regulation........................................................................± 1%
Features............................................V/F Adjustable, Adjustable
Voltage and Gain LED Indicators
Power Adjustment for Ambient Conditions
Temperature Deration
3% for every 10° C above °C (45kW)..................................25
1.65% for every 10° above °F (45kW).................................77
Altitude Deration
1% for every 100 m above m (45kW)...............................183
3% for every 1000 ft. above ft. (45kW).............................600
Controller................................................................R-200C
6-1
Stationary Emergency Generator
Specifications
GenSpec077 Rev. A 09/09

COLD WEATHER KIT
For cold climates, optional cold weather kit (part number 0F6148)
is recommended. The kit includes:
• Battery Warmer
• 4” Junction Box with hardware
• 6 qt. pack 5W-30 synthetic oil (engine)
COOLANT HEATER KIT
The optional Coolant Heater Kit (part number 0G3065) is available
to be used in conjunction with the Optional Cold Weather Kit. This
kit includes:
• 1500 watt, 120 volt Engine Block Heater
• Heater Mounting Bracket
• All fittings, hoses and hardware to mount and plumb heater
RECONFIGURING THE FUEL SYSTEM
NOTE:
All models are configured to run on natural gas from
the factory.
To reconfigure the fuel system from NG to LP, follow these steps:
1. Turn the main gas supply off.
2. Remove the carburetor fuel hose from the outlet port of the
demand regulator (see Figure 6.2).
Figure 6.2 — Reconfigure the Fuel System
BRASS BARBED
ELBOW
FUEL
ENRICHMENT
LINE
BLACK PIPE
FITTINGS
PORT 2
JET KEEPER
PORT
FUEL HOSE
FITTING
NEUTRAL
N1
N2
23
194
186
178
To Generator Control Panel
Utility In
Load
Out
Gen
Transfer Switch
This is a generic representation of the components contained in the transfer switch and connection box.
Refer to the wiring and schematic diagrams for generator specific connections.
ALTERNATOR
CONNECTION
BOX
TO ALTERNATOR
CONNECTION BOX
4- #14 GA
WIRES TO
ALTERNATOR
CONNECTION
BOX
Figure 6.1 — Interconnections
6-2
Stationary Emergency Generator
Specifications
GenSpec077 Rev. A 09/09

6-3
Stationary Emergency Generator
Specifications
GenSpec077 Rev. A 09/09
3. Disconnect the power wires from the fuel solenoid located on
top of the regulator assembly.
4. Loosen the spring clamp on the small fuel enrichment line and
remove the hose from the hose barb.
5. Remove the black pipe assembly from the outlet port of the
demand regulator.
6. Remove the NG fuel jet (loosen counter clockwise) from the
outlet port.
7. Remove the LP fuel jet (loosen counter clockwise) from the
jet keeper port on the regulator housing. Install this jet into the
outlet port in the regulator casting.
NOTE:
The jet sizes are stamped on the individual jets. The
larger jet size is used for running on NG.
8. Install the previously removed NG jet into the jet keeper port
on the regulator housing.
9. Install the previously removed black pipe onto the outlet port
of the demand regulator. Use pipe sealant on pipe threads.
10. Reverse steps 1-4 in this procedure to reactivate the demand
regulator.
DANGER
Serious injury or damage may occur if not con-
figured properly. Please consult an Authorized
Dealer with any questions.
IMPORTANT EXHAUST EMISSIONS
INFORMATION
This unit is equipped with an Active Exhaust
Emissions Control System to comply with
certain California Air District Regulations for
GASEOUS (SPARK-IGNITED) EMERGENCY
GENERATING SETS, including the South Coast
Air Quality Management District. DO NOT tam-
per with or disable any part of this system
including the exhaust catalyst, carburetor, oxy-
gen sensor, air-fuel ratio controller, solenoid
valve and gas regulator. These items are not
subject to periodic maintenance or adjustment.
CONTROL PANEL
The fuel select dipswitch is located in the control panel on the
circuit board. Engine timing for Natural Gas (NG) Fuel is selected
when dipswitch position 4 is set to "ON". Engine timing for LP
Fuel is selected when this switch is set to "OFF". See the R-200C
Control Panel manual for details.

ALTERNATOR AC LEAD
CONNECTIONS
The electrical wires in the unit’s AC connection (lower) panel
should be installed according to the number of leads and the
voltage/phase required for the application. The voltage and phase
are described on the generator data label. The number of lead
wires can be identified using the Specifications section and the
power output rating on the generator data label. For example, if
the generator produces 130kW, 277/480 Volt, 3-phase power, the
generator has 12 alternator output leads. Figure 7.3 describes the
stator power winding connection for the generator.
FOUR-LEAD, SINGLE-PHASE STATOR
Four-lead alternators (see Figure 7.1) are designed to supply elec-
trical loads with voltage code “A” (240V, 1-phase, 60 Hz). Electrical
power is produced in the stator power windings. These windings
were connected at the factory to the main circuit breaker as shown
in Figure 7.1.
The rated voltage between each circuit breaker terminal is 240V.
The rated voltage between each circuit breaker terminal and the
neutral point 00 is 120V.
Figure 7.1 — Four-lead, Single-phase Stator
ALTERNATOR POWER WINDING
CONNECTIONS
3-PHASE ALTERNATORS ("Y" CONFIGURATION)
The Stationary Emergency Generator is designed to supply
3-phase electrical loads. Electric power is produced in the alterna-
tor power windings. These windings were connected at the factory
to the main circuit breaker with a “Y” configuration as shown in
Figures 7.2 through 7.6.
The rated voltage between circuit breaker terminals E1-E2, E1-E3
and E2-E3 is 480V, 208V or 600V depending on the model.
The rated voltage between each circuit breaker terminal and the
neutral point 00 is 277V, 120V, or 346V depending on the model.
Figure 7.2 — Stator Power Winding
Connections - 3-phase, 277/480V (6 Lead)
3-phase 277/480V 6 Lead
E1
S1
S6
S5
S4
S2
E2
S3
E3 L - N
L - L
INTERNAL
CONNECTIONS
00 (NEUTRAL)
Figure 7.3 — Stator Power Winding
Connections - 3-phase, 277/480V (12 Lead)
3-phase 277/480V 12 Lead
E1
S1
S4
S7
S12
S11
S10
S8
S5
S2
E2
S9
S6
S3
E3 L - N
L - L
7-1
ACConn007 Rev. C 06/15
General Information

Figure 7.4 — Stator Power Winding
Connections - 3-phase, 120/208V (6 Lead)
3-phase 120/208V 6 Lead
E3 E2
00 (NEUTRAL)
INTERNAL CONNECTIONS E1
L-L
L-N
S1 S1
S4 S4
S6
S6
S3
S3
S5
S5 S2
S2
Figure 7.5 — Stator Power Winding
Connections - 3-phase, 120/208V (12 Lead)
3-phase 120/208V 12 Lead
E3 E2
E1
L-L
L-N
S7 S1
S10 S4
S12
S6
S9
S3
S5
S11 S2
S8
Figure 7.6 — Stator Power Winding
Connections - 3-phase, 346/600V (6 Lead)
E1
S1
S6
S5
S4
S2
E2
S3
E3 L - N
L - L
INTERNAL
CONNECTIONS
00 (NEUTRAL)
3-phase 346/600V (6 Lead)
3-PHASE ALTERNATORS ("DELTA" CONFIGURATION)
The Stationary Emergency Generator is designed to supply
3-phase electrical loads. Electric power is produced in the alterna-
tor power windings. These windings were connected at the factory
to the main circuit breaker with a "Delta" configuration as shown
in Figures 7.7 and 7.8.
The rated voltage between circuit breaker terminals E1-E2, E1-E3
and E2-E3 is 240V.
The rated voltage between E2 and the neutral point 00 is 208V. The
rated voltage E1-00 and E3-00 is approximately 120V.
NOTE: The voltage measured from E2 to 00 can greatly vary when
single phase load is placed on alternator.
Figure 7.7 — Stator Power Winding
Connections - 3-phase, 120/240V (6 Lead)
E2
0VAC
2VAC
208C
240C
Figure 7.8 — Stator Power Winding
Connections - 3-phase, 120/240V (12 Lead)
240 VAC
120 VAC 120 VAC
240 VAC
240 VAC
S2 S12
S11
S1
NB
S10
S3
E1 E3
E2
S5
S8
S9
S6
208 VAC
7-2
ACConn007 Rev. C 06/15
General Information

INSTALLATION
Refer to the separate “Installation Guide” supplied with the unit.
For safety reasons, the manufacturer recommends that this equip-
ment be installed, serviced and repaired by a Service Dealer or
other competent, qualified electrician or installation technician who
is familiar with applicable codes, standards and regulations. The
operator also must comply with all such codes, standards and
regulations.
PREPARATION BEFORE START-UP
The instructions in this section assume that the Stationary
Emergency Generator has been properly installed, serviced, tested,
adjusted and otherwise prepared for use by a competent, qualified
installation contractor. Be sure to read the “Safety Rules”, as well
as all other safety information in this manual, before attempting to
operate this (and related) equipment.
Before starting the generator for the first time, the installer
must complete the following procedures. For follow-up mainte-
nance information and/or service intervals, please refer to the
“Maintenance” section and the “Service Schedule”.
TRANSFER SWITCH
If this generator is used to supply power to any electrical system
normally powered by an electric utility, the National Electrical Code
requires that a transfer switch be installed. The transfer switch pre-
vents electrical backfeed between two different electrical systems.
(For additional information, see the applicable transfer switch
manual for this unit.) The transfer switch, as well as the generator
and other electrical components, must be properly located and
mounted in strict compliance with applicable codes, standards
and regulations.
FUEL SYSTEM
Make sure the fuel supply system to the generator (a) delivers the
correct fuel at the correct pressure and (b) is properly purged and
leak tested according to code. No fuel leakage is permitted. See
“Specifications” for more information.
GENERATOR SET LUBRICATION
Check the engine crankcase oil level before operating and add
oil to the proper level – the dipstick “FULL” mark. Never operate
the engine with the oil level below the dipstick “ADD” mark. See
“Specifications” and “Engine Oil Recommendations”.
Check the oil level in the generator gearbox (if so equipped) prior to
initial use and at the intervals indicated by the “Service Schedule.”
The recommended oil is SAE 90 gear lubricant.
NOTE:
This engine is shipped from the manufacturer with “break-in”
oil. This oil should be changed after 30 hours of operation.
PRIOR TO INITIAL START-UP
Prior to initially starting the generator, it must
be properly prepared for use. Any attempt to
crank or start the engine before it has been
properly serviced with the recommended types
and quantities of engine fluids (oil, coolant, fuel,
etc.) may result in an engine failure.
ENGINE COOLANT
Have the engine cooling system properly filled with the recom-
mended coolant mixture. Check the system for leaks and other
problems. See “Specifications” and “Coolant” sections.
BELT TENSION
Check-the engine-fan belt tension and condition prior to placing
the unit into service and at recommended intervals. Belt tension is
correct when a force of approximately 22 pounds (10 kg), applied
midway between pulleys, deflects the belt about 3/8- to 5/8-inch
(10 to 16 mm).
ELECTRICAL SYSTEM
Make sure the generator is properly connected to an approved
earth ground.
Make sure the generator battery is fully charged, properly installed
and interconnected, and ready for use.
NOTE:
Battery charger must be connected to 120 VAC, 15 amp circuit
to operate.
Check to ensure that there are no loose electrical connections.
Restrain any loose wires to keep them clear of any moving genera-
tor set components.
INITIAL INSPECTION FOR GENSET
STARTUP
Inspect for the following.
• Freight Damage.
• Manuals present.
• Fluid Levels (Oil, coolant, battery, Gear Drive).
• Correct fuel piping.
• Correct muffler installation for external applications (open units
only).
• Adequate air flow, clearances and ventilation per installation
drawings and applicable codes.
• Correct AC and DC wire size, connections and grounding.
Control and communication wiring to/from the transfer switch
must be run in a separate conduit from the AC power leads.
• Battery charger connection to 120 VAC.
• Unit secured to pad.
8-1
Stationary Emergency Generator
Installation
Install002 Rev. F 08/09

START-UP CHECKLIST
Before working on the Stationary Emergency
Generator, ensure the following:
• The AUTO/OFF/MANUAL switch is in the OFF position.
• The 120VAC supply to the battery charger is switched OFF.
PREPARATION FOR START-UP
• Ensure that the 120VAC circuit breaker to the battery charger is
open.
• Remove the fuse from the the control panel. Open the front door
of the control box and remove the 15 Amp ATO fuse in the lower
left-hand corner of the control box.
• Connect the battery cables to the battery. Attach negative bat-
tery cable last.
• Close the 120VAC circuit breaker to the battery charger.
• Measure the voltage at the battery before and after the charger
is turned on.
• Verify all ACelectrical connectionsare tight at the circuit breaker
and transfer switch.
• Visually inspect entire area looking for loose paper, plastic
wrappings, leaves, etc.
• Check all hoses clamps fittings for leaks or damage.
• Check all electrical plugs throughout the generator. Ensure each
plug is seated correctly and fully inserted into its receptacle.
• Verify the AUTO/OFF/MANUAL switch is in OFF position.
• Open the valve to the engine fuel line.
• Bleed the fuel system of air. (necessary for long fuel lines).
• Open the generator main line circuit breaker.
• Connect a manometer to the gas line and record the static pres-
sure. It must be as listed in the Specifications.
• Insert the fuse into the control panel.
• Move the AUTO/OFF/MANUAL switch to the manual position.
The engine should now crank and start.
• Check voltage at the generator terminals.
• For 3-phase units, check phase rotation at the transfer switch
terminals. The generator phase rotation must match the utility
phase rotation.
• Check for coolant, fuel, oil, and exhaust leaks.
• Close the generators main line circuit breaker.
• Turn the generator set off.
• Connect the UTILITY supply to the transfer switch.
• Set the AUTO/OFF/MANUAL switch to AUTO.
• Disconnect utility power before the transfer switch.
Engine should start, transfer to load.
Run at least 15 minutes on generator power. Make certain all
3-phase loads are functioning correctly (correct phase rota-
tion).
• Reconnect Utility power
Transfer switch will transfer back to Utility and engine will
shut down within the given time parameters set up for the
specific transfer switch and controller.
• Install all covers, access plates and door panels.
• Put the Owners Manual in a safe and accessible place.
• Make certain the AUTO/OFF/MANUAL switch is in the AUTO
position.
8-2
Stationary Emergency Generator
Installation
Install002 Rev. F 08/09

STATIONARY EMERGENCY
GENERATOR CONTROL AND
OPERATION
Refer to the appropriate control panel operator’s manual for this
unit.
OPERATING UNIT WITH MANUAL
TRANSFER SWITCH
If the Stationary Emergency Generator was installed in conjunction
with a transfer switch capable of manual operation only, the fol-
lowing procedure applies. A manually operated transfer switch is
one that will not provide automatic start-up and does not include
an intelligence circuit.
ENGINE START-UP AND TRANSFER
For additional information, refer to the applicable control panel
manual for this unit, as well as any literature pertaining to the
specific transfer switch.
n
The Maintenance Disconnect Switch and the
AUTO/OFF/MANUAL switches (if so equipped)
must be set properly, or the generator will
crank and start as soon as the utility power to
the transfer switch is turned off. Refer to appli-
cable control panel and transfer switch manuals
for more information.
n
Do not proceed until certain that utility source
voltage is available to the transfer switch and
the transfer switch main contacts are set to
UTILITY.

Do not attempt manual operation until all
power supplies to the transfer switch have been
positively turned off, or extremely dangerous -
possibly lethal - electrical shock will result.

Transfer switch enclosure doors should be kept
closed and locked. Only authorized personnel
should be allowed access to the transfer switch
interior. Extremely high and dangerous voltages
are present in the transfer switch.
In order to transfer load from the utility source to the generator,
follow these directions:
Turn OFF or disconnect the utility power circuit to the transfer•
switch, using the means provided (such as the utility source
main line circuit breaker).
Set the transfer handle to its UTILITY (NORMAL) position with•
load circuits connected to the utility power supply.
Set the generator’s main line circuit breaker to its OFF (or OPEN)•
position.
Start the generator.•
nDo not crank the engine continuously for lon-
ger than 30 seconds, or the heat may
damage the starter motor.
Let engine stabilize and warm up.•
Check all applicable instrument and gauge readings. When•
certain that all readings are correct, move the transfer switch
manual handle to the STANDBY (or EMERGENCY STANDBY)
position, i.e., load circuits supplied by the generator.
Set the generator’s main line circuit breaker to its ON (or•
CLOSED) position.
Load circuits are now powered by the generator.•
RETRANSFER AND SHUTDOWN
For additional information, refer to the applicable control panel
manual for this unit, as well as any literature pertaining to the
specific transfer switch.
To transfer the load back to the utility power source and shut down
the generator, follow these directions:
Set the generator’s main line circuit breaker to its OFF (or OPEN)•
position.
Manually move the transfer switch handle to its UTILITY•
(NORMAL) position, i.e., load circuits connected to the utility.
Turn ON the utility power supply to the transfer switch, using•
the means provided (such as the utility power source main line
circuit breaker).
Let the generator run at no-load for a few minutes to stabilize•
internal temperatures.
Shut down the generator.•
OPERATING UNIT WITH AUTOMATIC
TRANSFER SWITCH
If the Stationary Emergency Generator has been installed with an
automatic transfer switch, the engine may be started and stopped
automatically or manually.
NOTE:
Refer to the applicable manual for your transfer switch and to
“Transfer Switch Start Signal Connections”. In addition, please
note the dangers under “Engine Start-up and Transfer.”
9-1
Oper001 Rev. D 05/10
Operation

MAINTENANCE PERFORMED BY
SERVICE DEALERS/CONTRACTORS

Before working on the Stationary Emergency
Generator, ensure the following:
The AUTO/OFF/MANUAL switch is in the OFF position.•
The 15A fuse has been removed from the control box.•
The 120VAC supply to the battery charger is switched OFF.•
The negative battery cable has been removed.•
EVERY THREE MONTHS
1. Check battery condition.
2. Inspect and test fuel system.
3. Check transfer switch.
4. Inspect exhaust system.
5. Check engine ignition system.
6. Check fan belts.
ONCE EVERY SIX MONTHS
1. Test Engine Safety Devices (low oil pressure, low coolant
level, high coolant temperature).
ONCE ANNUALLY
1. Test engine governor; adjust or repair, if needed.
2. Clean, inspect generator.
3. Flush cooling system.
4. Clean/re-gap spark plugs or replace as necessary.
FIRST 30 OPERATING HOURS
1. Change engine "break-in" oil and filter.
FIRST 100 OPERATING HOURS
1. Change engine oil and oil filter. After initial change, service
engine oil and filter at 100 operating hours or six months,
whichever comes first.
2. Retorque intake and exhaust manifold.
EVERY 500 OPERATING HOURS
1. Service air filter.
2. Check starter.
3. Check engine DC alternator.
COOLING SYSTEM
Air intake and outlet openings in the generator compartment must
be open and unobstructed for continued proper operation. This
includes such obstructions as high grass, weeds, brush, leaves
and snow.
Without sufficient cooling and ventilating air flow, the engine/gen-
erator quickly overheats, which causes it to shut down. (See the
installation diagram.)

The exhaust system parts from this product
get extremely hot and remains hot after shut-
down. High grass, weeds, brush, leaves, etc.
must remain clear of the exhaust. Such mate-
rials may ignite and burn from the heat of the
exhaust system.
OVERLOAD PROTECTION FOR
ENGINE DC ELECTRICAL SYSTEM
Engine cranking, start up and running are controlled by a solid
state Engine Controller circuit board. Battery voltage is delivered to
that circuit board via a 15 amp fuse. These overcurrent protection
devices will open if the circuit is overloaded.
n
If a circuit breaker opens or a fuse element
melts, find the cause of the overload before
resetting the circuit breaker or replacing the
fuse.
CHECKING FLUID LEVELS
CHECK ENGINE OIL
Check engine crankcase oil level (Figure 10.1) at least every 20
hours of operation, or prior to use.
Figure 10.1 - Oil Dipstick and Oil Fill Cap
Oil Fill Cap
Oil
Dipstick
Oil Filter
10-1
Maint018 Rev. F 07/10
Maintenance

Remove oil dipstick and wipe dry with a clean, lint-free cloth.•
Install oil dipstick, then remove again.•
Oil should be between FULL and ADD marks.•
If oil level is below the dipstick ADD mark, remove oil fill cap-.•
Add the recommended oil to bring oil level up to the FULL
mark. DO NOT FILL ABOVE THE “FULL” MARK. See “Engine Oil
Recommen-dations” for recommended oils.
BATTERY FLUID
Check battery electrolyte fluid based on the Maintenance Schedule.
Fluid should cover separators in all battery cells. If fluid level is low,
add distilled water to cover tops of separators. DO NOT USE TAP
WATER IN BATTERY.
ENGINE COOLANT
Check coolant level in coolant recovery bottle. See the Specifications
section.
Add recommended coolant mixture as necessary.•
Periodically remove radiator pressure cap (only when engine•
has cooled down) to make sure the coolant recovery system
is functioning properly. Coolant should be at bottom of radia-
tor filler neck. If coolant level is low, inspect gasket in radiator
pressure cap. Replace cap, if necessary. To have pressure cap
tested, contact a Service Facility. Inspect cooling system and
coolant recovery system for leaks.
MAINTENANCE OWNER/
OPERATOR CAN PERFORM

Before working on the generator, ensure the
following:
The AUTO/OFF/MANUAL switch is in the OFF position.•
The 15A fuse has been removed from the control box.•
The 120VAC supply to the battery charger is switched OFF.•
The negative battery cable has been removed.•
CHECK ENGINE OIL LEVEL
Refer to “Checking Fluid Levels”.
CHECK BATTERY
See “Checking Fluid Levels”.•
Check battery cables for condition, tightness, corrosion or dam-•
age. Clean, tighten or replace as necessary.
EXERCISE SYSTEM
Start the Stationary Emergency Generator engine at least once
every seven days and let it run at least 20 minutes. For more
detailed exercise information, see the respective sections in the
Control Panel Technical Manual that is supplied with the unit.
INSPECT COOLING SYSTEM
Inspect engine cooling system. See “Maintenance Schedule”.•
Check hoses for damage, deterioration, leaks, etc. Correct any•
discrepancies found.
Check hose clamps for tightness.•
CHECK ENGINE COOLANT LEVEL
See the “Checking Fluid Levels” section.
PERFORM VISUAL INSPECTION
Complete a thorough visual inspection of the entire engine-genera-
tor monthly. Look for obvious damage, loose, missing or corroded
nuts, bolts and other fasteners. Look for fuel, oil or coolant leaks.
INSPECT EXHAUST SYSTEM
Inspect the exhaust system at least once every three months.
Check all exhaust system pipes, mufflers, clamps, etc. for condi-
tion, tightness, leaks, security, damage.
CHECK FAN BELT
Inspect fan belts every three months. Replace any damaged,•
deteriorated, worn or otherwise defective belt.
Check fan belt tension. Thumb pressure, exerted midway•
between pulleys, should deflect about 3/8 to 5/8 of an inch.
Adjust belt tension as required.
Check fan belt alignment (see Figure 10.2).•
Figure 10.2 – Fan Belt
10-2
Maint018 Rev. F 07/10
Maintenance

INSPECT ENGINE GOVERNOR
Visually inspect electronic governor.
n
Do not attempt to adjust the governor. Only
qualified service facilities should adjust
the governor. Excessively high operating
speeds are dangerous and increase the
risk of personal injury. Low speeds impose
a heavy load on the engine when adequate
engine power is not available and may
shorten engine life. Correct rated frequency
and voltage are supplied only at the proper
governed speed. Some connected electrical
load devices may be damaged by incorrect
frequency and/or voltage. Only qualified ser-
vice technicians should adjust the governed
speed.
CHANGING ENGINE OIL
n
Hot oil may cause burns. Allow engine to
cool before draining oil. Avoid prolonged
or repeated skin exposure with used oil.
Thoroughly wash exposed areas with soap.
Refer to maintenance performed by service facilities for engine oil
and filter change frequencies.
Drain the oil while the engine is still warm from running. This
means warm up the engine, shut it down and drain immediately
as follows:
1. Remove the drain hose from its retaining clip or cut the zip-tie
securing the oil drain hose.
2. Loosen and remove OIL DRAIN HOSE CAP. Drain oil com-
pletely into suitable container.
3. When all oil has drained, install and tighten OIL DRAIN HOSE
CAP and secure drain hose with a new zip-tie, or place the
hose in its retaining clip.
4. Turn OIL FILTER (Figure 10.3) counterclockwise and remove.
Properly dispose of old filter.
Figure 10.3 – Oil Filter
Oil
Dipstick
Oil Filter
5. Apply light coating of new engine oil to seal of new oil
filter.-Install FILTER and tighten by hand only. DO NOT OVER
TIGHTEN.
6. Remove OIL FILL CAP and add recommended oil. Crankcase
oil capacity is listed in the "Specifications" section.
n
After refilling the crankcase with oil, always
check oil level on dipstick. NEVER OPERATE
ENGINE WITH OIL BELOW THE DIPSTICK
“ADD” MARK.
7. Start engine and check for oil leaks.
8. Shut OFF engine and wait 10 minutes for the oil to settle down
into the oil pan. Recheck oil level on dipstick. DO NOT fill
above the dipstick "FULL" mark.
9. Dispose of used oil at a proper collection center.
CHANGING THE ENGINE AIR FILTER
To replace the engine air filter, remove the air filter cover and
replace the air filter making sure it is positioned properly before
reattaching the cover (Figure 10.4).
See the “Service Schedule,” for air filter maintenance.
Figure 10.4 – Engine Air Filter
Air Filter
SPARK PLUGS
Reset the spark plug gap or replace the spark plugs as necessary
(Figure 10.5).
1. Clean the area around the base of the spark plugs to keep dirt
and debris out of the engine. Clean by scraping or washing
using a wire brush and commercial solvent. Do not blast the
spark plugs to clean.
2. Remove the spark plugs and check the condition. Replace
the spark plugs if worn or if reuse is questionable. See the
“Service Schedule” section for recommended inspection.
3. Check the spark plug gap using a wire feeler gauge. Adjust the
gap to 1.07-1.17 mm (0.042-0.046 inch) by carefully bend-
ing the ground electrode (Figure 10.5).
10-3
Maint018 Rev. F 07/10
Maintenance