Winco PSS30/F Setup guide

WINCO INC. 225 S. CORDOVA AVE. LE CENTER, MN 56057 507-357-6821
SERVICE DEPT. 507-357-6831
www.wincogen.com
INSTALLATION AND
OPERATORS
PSS21/F
PSS30/F
GENERATOR
MANUAL

2REV BOPM-111
TABLE OF CONTENTS
SAVE THESE INSTRUCTIONS 2
TESTING POLICY 3
SAFETY INFORMATION 3
ANSI SAFETY DEFINITIONS
SPECIFICATIONS 4
PSS21/F
PSS30/F
INTRODUCTION 5
PRODUCT DESCRIPTION
PREPARING THE UNIT 5
UNPACKING
INSTALLATION 5
ENGINE-GENERATOR SET MOUNTING
FUEL INSTALLATION 6
INSTALLING THE FUEL LINE
LIQUID PROPANE VAPOR (LP)
NATURAL GAS (NG)
FUEL PRESSURE
INSTALLING THE BATTERY 8
FUEL PRESSURE TABLES
NG/LP FUEL CONVERSION
SERVICING BATTERIES
BATTERY CHARGING
CONNECTING THE BATTERY CHARGER & BLOCK HEATER
SAVE THESE INSTRUCTIONS
This manual contains important instructions that should be followed
during installation and maintenance of the generator. Read and
understand all instructions in the manual before starting and operating
the generator.
USING THIS MANUAL
Congratulations on your choice of a WINCO generator. You have
selected a high-quality, precision-engineered generator designed and
tested to give you years of satisfactory service.
To get the best performance from your new generator, it is important
that you carefully read and follow the operating instructions in this
manual.
Should you experience a problem please follow the “Troubleshooting
Tables” near the end of this manual. The warranty listed in the manual
describes what you can expect from WINCO should you need service
assistance in the future.
COPY YOUR MODEL AND SERIAL NUMBER HERE
No other WINCO generator has the same serial number as yours.
If you should ever need to contact us on this unit, it will help us to
respond to your needs faster.
MODEL __________________________________________________
SERIAL NUMBER _________________________________________
PURCHASE DATE _________________________________________
DEALER NAME ___________________________________________
DEALER PHONE # ________________________________________
AC ELECTRICAL CONNECTIONS 10
DC ELECTRICAL INTERCONNECTION 11
STARTING PROCEDURE 12
ASCO 185 UL SWITCH
ASCO 300 UL SWITCH
INITIAL START UP
VOLTAGE REGULATOR WIRING 14
TROUBLE SHOOTING TABLES 14
MAINTENANCE SCHEDULE 15
PREVENTATIVE MAINTENANCE 15
AUTOMATIC TRANSFER SWITCH
ENGINE-GENERATOR SET
COLD WEATHER OPERATION
OUTLINE DRAWING 16
THREE PHASE WIRING - DELTA 17
THREE PHASE AC WIRE HIGH AND LOW WYE 17
SINGLE PHASE AC WIRING - 4 LEAD 17
ENGINE HARNESS SCHEMATIC 18
DSE 7310 MKII WIRING DIAGRAM 19
24 MONTH LIMITED WARRANTY 20

3
REV B OPM-111
SAFETY INFORMATION
This engine generator set has been designed and manufactured to
allow safe, reliable performance. Poor maintenance, improper or
careless use can result in potentially deadly hazards; from electrical
shock, exhaust gas asphyxiation, or re. Please read all safety
instructions carefully before installation or use. Keep these instructions
handy for future reference. Take special note and follow all warnings on
the unit labels and in the manuals.
ANSI SAFETY DEFINITIONS
DANGER:
DANGER indicates an imminently hazardous situation which, if not
avoided, will result in death or serious injury. This signal word is to be
limited to the most extreme situations.
WARNING:
WARNING indicates a potentially hazardous situation which, if not
avoided, could result in death or serious injury.
CAUTION:
CAUTION indicates a potentially hazardous situation which, if not
avoided, may result in minor or moderate injury. It may also be used to
alert against unsafe practices.
1. ELECTRICAL SHOCK -
The output voltage present in this equipment can cause fatal electric
shock. This equipment must be operated by a responsible person.
A. Do not allow anyone to operate the generator without proper
instruction.
B. Guard against electric shock.
C. Avoid contact with live terminals or receptacles.
D. Use extreme care if operating this unit in rain or snow.
E. Use only three-pronged grounded receptacles and extension
cords.
F. Be sure the unit is properly grounded to an external ground rod
driven into the earth.
2. FIRE HAZARD -
Gasoline and other fuels present a hazard of possible explosion and/
or re.
A. Do not refuel when the engine is running or hot.
B. Keep fuel containers out of reach of children.
C. Do not smoke or use open ame near the generator set or fuel
tank.
D. Keep a re extinguisher nearby and know its proper use.
Fire extinguishers rated ABC by NFPA are appropriate.
E. Store fuel only in an approved container, and only in a well
ventilated area.
F. Follow local codes for closeness to combustible material.
3. DEADLY EXHAUST GAS -
Exhaust fumes from any internal combustion engine contain carbon
monoxide, an invisible, odorless and deadly gas that must be mixed
with fresh air.
A. Operate only in well ventilated areas.
B. Never operate indoors including attached garages
C. Never operate the unit in such a way as to allow exhaust gases
to seep back into closed rooms (i.e. through windows, walls,
oors).
4. NOISE HAZARD -
Excessive noise is not only tiring, but continual exposure can lead to
loss of hearing.
A. Use hearing protection when working around this equipment for
long periods of time.
B. Keep your neighbors in mind when using this equipment.
5. CLEANLINESS -
Keep the generator and surrounding area clean.
A. Remove all grease, ice, snow or materials that create
slippery conditions around the unit.
B. Remove any rags or other materials that could create a
potential re hazard.
C. Carefully clean up any gas or oil spills before starting the unit.
6. SERVICING EQUIPMENT -
All service, including the installation or replacement of service parts,
should be performed only by a qualied technician.
A. Use only factory approved repair parts.
B. Do not work on this equipment when fatigued.
C. Never remove the protective guards, covers, or receptacle
panels while the engine is running.
D. Use extreme caution when working on electrical components.
High output voltage from this equipment can cause serious
injury or death.
E. Always avoid hot mufers, exhaust manifolds, and engine parts.
They can cause severe burns instantly.
F. The use of the engine-generator set must comply with all
national, state, and local codes.
TESTING POLICY
Before any generator is shipped from the factory, it is fully checked
for performance. The generator is loaded to its full capacity, and the
voltage, current, and frequency are carefully checked.
Rated output of generator is based on engineering tests of typical units,
and is subject to, and limited by, the temperature, altitude, fuel, and
other conditions specied by the manufacturer of applicable engines.

4REV BOPM-111
SPECIFICATIONS
PSS21/F
LP Gas
Wattage 21,000 21,000 21,000 22,000
Volts 120/240 120/208 120/240 277/480
kvA 21 26.25 26.25 26.49
Phase Single Three Three Three
Amps 87.5 72.9 63 33.11
CB Size 90 80 80 35
Hertz 60 60 60 60
Natural Gas
Wattage 21,000 21,000 21,000 22,000
Volts 120/240 120/208 120/240 277/480
kvA 21 26.25 26.25 26.49
Phase Single Three Three Three
Amps 87.5 72.9 63 33.11
CB Size 90 80 80 35
Hertz 60 60 60 60
Engine
Model ZENITH 2.8L
Starting System 12 Volt
Mufer Standard
Fuel Consumption (full load)
LP
NG
3.76 GAL/HR - 342,516 BTU/HR
321 FT³/HR - 321,332 BTU/HR
Generator Testing Resistance
Note: Review the Stamford Newage nameplate on your generator
before selecting the correct information below.
Model Stamford S0L2-M1
Winding Group 711
Resistances:
Rotor 0.747 Ohms @22°C
Stator (L-N) 0.290 Ohms Per Ph @ 22°C
Exciter Rotor (L-N) 0.106 Ohms Per Ph @ 22°C
Exciter Stator (L-N) 15.42 Ohms @ 22°C
Aux Winding 5.160 Ohms @ 22°C
Voltage Regulator (L-N) AS540
Model Stamford S0L2-M1
Winding Group 706
Resistances:
Rotor 0.747 Ohms @22°C
Stator (L-N) 0.097 Ohms Per Ph @ 22°C
Exciter Rotor (L-N) 0.106 Ohms Per Ph @ 22°C
Exciter Stator (L-N) 15.42 Ohms @ 22°C
Aux Winding 2.570 Ohms @ 22°C
Voltage Regulator (L-N) AS540
PSS30/F
LP Gas
Wattage 30,000 30,000 30,000 30,000
Volts 120/240 120/208 120/240 277/480
kvA 27 37.5 37.5 37.5
Phase Single Three Three Three
Amps 125 104 90 45
CB Size 125 100 100 45
Hertz 60 60 60 60
Natural Gas
Wattage 27,120 28,000 28,000 28,000
Volts 120/240 120/208 120/240 277/480
kvA 28 35 35 35
Phase Single Three Three Three
Amps 113 97 84 42
CB Size 125 100 100 45
Hertz 60 60 60 60
Engine
Model ZENITH 2.8L
Starting System 12 Volt
Mufer Standard
Fuel Consumption (full load)
LP
NG
4.74 GAL/HR - 431,441 BTU/HR
407 FT³/HR - 407,741 BTU/HR
Generator Testing Resistance
Note: Review the Stamford Newage nameplate on your generator
before selecting the correct information below.
Model Stamford S1L2-K1
Winding Group 711
Resistances:
Rotor 0.965 Ohms @22°C
Stator (L-N) 0.177 Ohms Per Ph @ 22°C
Exciter Rotor (L-N) 0.112 Ohms Per Ph @ 22°C
Exciter Stator (L-N) 15.5 Ohms @ 22°C
Aux Winding 3.91 Ohms @ 22°C
Voltage Regulator (L-N) AS540
Model Stamford S1L2-H1
Winding Group 706
Resistances:
Rotor 0.891 Ohms @22°C
Stator (L-N) 0.079 Ohms Per Ph @ 22°C
Exciter Rotor (L-N) 0.112 Ohms Per Ph @ 22°C
Exciter Stator (L-N) 15.5 Ohms @ 22°C
Aux Winding 2.3 Ohms @ 22°C
Voltage Regulator (L-N) AS540

5
REV B OPM-111
INTRODUCTION
PRODUCT DESCRIPTION
The Package Standby System is designed to automatically provide
standby power to unattended loads during electrical outages. Upon
interruption of normal electrical service, the Packaged Standby
System electrical control circuits will automatically start the engine.
The generator will produce electrical power and the Automatic Transfer
Switch (ATS) will automatically transfer the electrical loads to the
engine-generator set. Upon restoration of normal electrical service the
emergency transfer switch will sense return of the normal commercial
power. The Automatic Transfer Switch will transfer the load back
to the normal commercial power source. The engine control circuits will
begin a cool-down cycle, after which the fuel supply will be shut off and
the engine ignition system disabled.
These packaged standby systems consist of two major components:
1. AUTOMATIC TRANSFER SWITCH
A wall mounted ASCO 185 or ASCO 300 Automatic Transfer Switch
(ATS) designed for inside or outside installation. The transfer switch is
UL1008 approved. A fourteen day electronic exerciser circuit is installed
in the ATS as standard equipment. The ATS also contains the power
failure sensing circuitry necessary to start and stop the engine
generator set. The transfer switch is also equipped standard with a 3
second start delay, and a 15 second transfer delay to allow the engine
to warm up before transferring the load to the generator. When the line
power is restored the ATS has a 5 minute transfer delay to allow the
incoming utility to stabilize before transferring back to line power and
then an additional 1 minute engine cool down delay before the engine
shuts down. Read and understand the ATS owners manual before
installing, servicing or operating the transfer switch.
MINIMUM
UNIT VOLTAGE ATS AMPERAGE
PSS21-3 120/240 100
PSS21-4 120/208 100
PSS21-17 120/240 100
PSS21-18 277/480 70
PSS30-3 120/240 150
PSS30-4 120/208 100
PSS30-17 120/240 100
PSS30-18 277/480 70
2. ENGINE / GENERATOR
The engine generator set consists of a Zentih 2.8L, I-4 Industrial, four
cylinder, liquid cooled engine equipped to run on L.P./N.G. fuel. The
engine operates at 1800 rpm and frequency regulation is maintained
by the electronic governor within .5 cycles variation, from no load to
rated load. The generator is a single bearing, direct drive, rotating eld
design. The generator is connected to the engine ywheel via exible
drive disks. The engine generator is available mounted in a weather
proof enclosure for outside installation. Connection boxes are provided
to all customer connections (both AC output and DC control). A
customer supplied 12 Volt, 650 CCA (BCI group 24) battery is required
to complete the installation. Engine operation is controlled by a Deep
Sea (DSE) engine mounted in the engine generator enclosure.
NOTICE:
These units will automatically transfer if a power outage occurs while
running in an exercise mode.
PREPARING THE UNIT
UNPACKING
CAUTION: EQUIPMENT DAMAGE
When you unpack your new generator, be sure to remove all of the
information sheets and manual from the carton.
1. As you receive your unit, it is critical to check it for any damage. If
any damage is noted, it is always easiest to refuse the shipment and
let WINCO take care of the freight claim. If you sign for the unit, the
transfer of the ownership requires that you le the freight claim
2. Before proceeding with the preparations of your new generator
for operation, take a couple of minutes to ensure the unit you have
received is the correct model and review the specication pages in this
manual to ensure that this unit meets your job requirements.
CAUTION:
These units are shipped with oil. Be sure to check oil levels before
operating. See engine manufacturer’s instruction manual for
recommended oil requirements before initial starting.
INSTALLATION
WARNING:
Before proceeding with installation, be sure the operation selector
switch is in the stop position and the battery disconnected.
These engine generator sets are designed to be mounted on a pad
where there is proper ventilation. The transfer switch is mounted
next to your electrical entrance or distribution panel inside or outside
the building. Consult a qualied, licensed electrician or contractor to
install and wire the transfer switch. The installation must comply with
all national, state and local codes. Before beginning the installation
process check the rating of the generator set and its transfer switch
rating. Be certain they can handle the intended load and are compatible
with the entrance voltage, phase and current ratings. Plans for
installation should be prepared with proper attention to mechanical and
electrical engineering detail to assure a satisfactory system installation.
The information in this manual is offered only as a guide to nalizing
your installation plans.
ENGINE-GENERATOR SET MOUNTING
WARNING: PERSONAL INJURY:
The enclosures on these units can become very hot adjacent to the
exhaust areas. Special care must be taken when installing these units
to insure that the risk of contact by people is minimized.
The unit’s main frame should be bolted to a pad that meets local code.
Various materials, including concrete and composites, are acceptable

6REV BOPM-111
LIQUID PROPANE VAPOR (LP)
Refer to the tables on the following pages for fuel line size and
recommended tank size. For distances of 25 feet or over, a two
regulator fuel system is recommended. This is accomplished by
installing a primary regulator at the tank which will reduce the tank
pressure down to 10 to 15 lbs. A low pressure regulator is installed to
further reduce the fuel pressure to the required six (6) oz. operating
pressure. This low pressure regulator must be at least 10 feet from the
engine generator set; any closer installation will require a larger line be
installed to provide a fuel reservoir. This is also true for the single low
pressure regulator, it should also be a minimum of 10 feet from the unit.
If this is not done, the demand regulator on the unit and the pressure
regulator in the fuel line will interfere with each other. When the two
(2) regulator system is used on LP, a fuel line size of 3/4 to 1 inch is
generally adequate for distances up to 300 feet from the primary to the
low pressure regulator. Consult your local fuel supplier for your exact
requirements . The appropriate line size from the following table is then
installed from the low pressure regulator to the generator set.
Feet* Size of pipe
Up to 25 ft 1” pipe
Over 25 ft Use a two regulator system
*Allow an additional 3 feet for each standard elbow.
DO NOT use ‘street ells’ (restrictive).
LP TANK SIZING
Tank Temperature Tank Size
60° F (16° C) 160 Gallons
32° F (0° C) 300 Gallons
0° F (18° C) 1000 Gallons
-20° F (-29° C) 2000 Gallons
LIQUID WITHDRAWAL SYSTEMS
When installing a unit equipped with the LP liquid withdrawal, a
primary regulator is not required on the supply tank. The supply line
is connected to a liquid withdrawal valve on the supply tank and runs
directly to the fuellock strainer mounted on the engine generator set.
Normally a 3/8 to 1/2 inch copper line is acceptable for this type of
fuel installation. You must be sure that the valve you have connected
to on the supply tank is in fact a liquid supply valve and has a drop
tube inside the tank that is pulling fuel from the bottom of the supply
tank. Before starting the unit, you must conrm that you have a good
liquid supply at the unit. Engine generator sets equipped for liquid
withdrawal will not run properly when supplied with vapor fuel.
NATURAL GAS (NG)
The primary regulator (fuel meter) on the building should deliver the
correct volume and pressure to the generator set. This regulator must
be sized to deliver the required BTU’s to the generator set and all other
appliances in the building. If the primary regulator (fuel meter) is a high
as long as they are structurally sound supporting the weight of the
unit and preventing movement during operation. The mounting holes
on the base of this unit is 0.625” in diameter. The engine-generator is
mounted on a sub-frame which is isolated with special shock mounts
on the main frame. This allows the engine-generator to vibrate without
affecting the control panel on the main frame.
Do not install any shock mounts between the base frame and the
pad. Engine vibration will be transmitted to the control panel causing
erroneous start/stop cycles and premature control failure.
These units should be mounted a minimum of 24” from a structure. This
will allow for ample room to maintain and work on the generator set.
Units must be installed in accordance with all local, state, and national
codes. Consult your local agency for specic requirements.
FUEL INSTALLATION
The fuel supply should be as close as possible to the engine. This will
reduce the installation cost of fuel runs. The information in this manual
is offered to assist you in providing the proper fuel for your engine.
However, this information is only provided to inform you of the engine’s
requirements and assist in making you aware of the decisions you
must make. In no case should the instructions and information provided
be interpreted to conict with any local, state or national codes. If in
doubt, always consult your local re marshal, gas supplier or building
inspector.
WARNING: FIRE HAZARD:
All fuel runs should be installed by a licensed fuel supplier.
To connect the fuel line to the generator set you will connect your
incoming fuel line to the .75 inch NPT tting located on the left side
of the engine-generator set. This tting is shipped with a plastic plug
installed to insure the fuel system stays clean. For all vapor fuel
systems the delivery pressure of the fuel to the fuel solenoid on the unit
must be four to six ounces psi (per square inch) or 7 to 11 inches
W.C. (water column). These fuel pressures are critical; failure to
provide the proper pressure can cause many problems including failure
to start, inability to produce full power, or damage to the equipment.
These generators have been tested with both natural gas and LP at
the factory. Before starting the engine you must verify it is congured
for the proper fuel. See additional information in the NG/LP conversion
section.
INSTALLING THE FUEL LINE
NOTICE: The engine generator sets are properly adjusted before they
leave the factory. The electronic control panel will indicate if the LP
mode is active
NATURAL GAS or LP VAPOR PIPE SIZE
Size of pipe normally required for generators operating on natural gas
or LP vapor. Unit location will determine the size of fuel line that is
required to supply the engine with a constant fuel pressure and volume.

7
REV B OPM-111
pressure regulator, then a low pressure regulator must be installed
to bring the pressure down to 4-6 oz. (7-11 inches water column) of
pressure. This low pressure regulator must be at least 10 feet from the
engine generator set; any closer installation will require a larger line
be installed to provide a fuel reservoir. If this is not done, the demand
regulator on the unit and the pressure regulator in the fuel line will
interfere with each other. This regulator must be sized to accommodate
the demand of the generator set and any other appliance connected to
it. See the following table for the correct size of pipe to be installed.
Feet* Size of pipe
Up to 25 ft ¾” pipe
25 - 100 ft 1” pipe
Over 100 ft Use a two regulator system
*Allow an additional 3 feet for each standard elbow. DO NOT use
‘street ells’ (restrictive).
WARNING: PERSONAL DANGER:
Do not use galvanized pipe in fuel line runs. The galvanized coating
can become eroded and ake off, causing possible obstructions in the
regulator or fuel valve. The results could range from inoperative engine
to hazardous fuel leaks.
CAUTION:
Be careful when sealing gas joints. Excessive sealing compound can
be drawn into the solenoid, regulator or carburetor causing an engine
malfunction.
FUEL PRESSURE
Correct fuel pressure cannot be stressed enough. The most common
cause for inoperative systems is an inadequate or incorrect fuel
pressure. Performance of the engine is in direct relation to the
correctness of the fuel system. Shown below is a diagram of a typical
LP vapor fuel installation. Notice the following tables give two different
units of measuring fuel pressure. The rst and most accurate is the
use of a simple water manometer. A manometer is calibrated in inches
of water column . The second is with a pressure gauge calibrated in
ounces per square inch.
Reference numbers 1 through 3 in the diagram above are system parts
supplied by the customer. Reference number 4 is on the generator.
The following diagram is of a natural gas (NG) installation.
Reference numbers 2 through 4 in the previous diagram are system
parts supplied by the customer. Reference number 4 is on the
generator.

8REV BOPM-111
INSTALLING THE BATTERY
CAUTION:
In the following battery installation procedure, check to be sure the
selector switch remains in the ‘off’ position. This should be your last
step before initial start-up.
A customer supplied twelve-volt battery is required to complete the
installation. Installation of the highest CCA rated battery, within the
correct BCI group (size), will increase cold weather starting
performance. Gel batteries should not be used with the battery
tender installed in the generator enclosure.
Voltage BCI Group MIN. CCA Rating
12 24 650
Installation and servicing of batteries must be performed or supervised
only by persons knowledgeable of batteries and the required
precautions. Keep unauthorized persons away from batteries. When
installing or replacing batteries, use the proper group/size starting
battery. The battery should be a maintenance free lead acid design.
Deep cycle batteries will not work for this application.
CAUTION: PERSONAL DANGER:
NEVER dispose of a battery in a re. The battery is capable of
exploding.
DO NOT open or mutilate the battery. Released electrolyte is known to
be harmful to the skin and eyes and to be very toxic.
These generator sets are all NEGATIVE ground. Be very careful not
to connect the battery in reverse polarity, as this may short circuit
the battery charging system on the engine and damage electronic
components.
CAUTION:
A battery presents a risk of electrical shock and high short circuit
current. The following precautions must be observed when working
with batteries.
1. Remove watches, rings, and other metal objects.
2. Use tools with insulated handles.
3. Check both the battery cable ends and the battery posts to be sure
they are free of corrosion.
4. Always connect the battery positive cable rst and then connect the
FUEL PRESSURE TABLES
The following tables are the fuel pressure readings at each reference in
the system.
Single low pressure regulator (LP vapor only)
Ref# 1 3 4
Unit off Line PSI 7-11 in
4-6 oz
7-11 in
4-6 oz
Starting Line PSI 7-11 in
4-6 oz
7-11 in
4-6 oz
No load Line PSI 7-11 in
4-6 oz
7-11 in
4-6 oz
Full load Line PSI 7-11 in
4-6 oz
7-11 in
4-6 oz
Two regulator system (LP vapor only)
Ref# 1 2 3 4
Unit off Line PSI 10-15 lbs 7-11 in
4-6 oz
7-11 in
4-6 oz
Starting Line PSI 10-15 lbs 7-11 in
4-6 oz
7-11 in
4-6 oz
No load Line PSI 10-15 lbs 7-11 in
4-6 oz
7-11 in
4-6 oz
Full load Line PSI 10-15 lbs 7-11 in
4-6 oz
7-11 in
4-6 oz
Natural gas
Ref# 2 3 4
Unit off 2 PSI 7-11 in
4-6 oz
7-11 in
4-6 oz
Starting 2 PSI 7-11 in
4-6 oz
7-11 in
4-6 oz
No load 2 PSI 7-11 in
4-6 oz
7-11 in
4-6 oz
Full load 2 PSI 7-11 in
4-6 oz
7-11 in
4-6 oz
NG/LP FUEL CONVERSION
This generator set was tested on both LP and NG at the factory. Ensure
proper fuel conguration before operating.
CAUTION: EQUIPMENT DAMAGE:
Do not make any fuel adjustments or governor adjustments until all
pressure readings are in compliance with specication.
These engine/generator sets are easy to convert between LP or NG.
As the engine timing is controlled by the ECU on the engine you only
need to tell it what fuel you want to operate on. A small rocker switch
has been provide on the underside of the engine control cabinet for this
purpose.
Opening the rocker switch will tell the ECU mounted on the engine that
you are operating on NG Fuel. Closing the rocker switch will tell the
ECU that the fuel being supplied is LP. The Advance Power Controller
has an indicator light for LP. When this light is on, the engine is set-up
for LP, when the LP light is out the engine is set up for NG. The ECU
will then reprogram the engine to operate on the proper fuel.
LUBRICATION & COOLANT
Before starting the engine, check the oil level in the crankcase. If
it is low, rell to the full mark with the proper weight/grade of oil as
recommended by the engine manufacturer’s maintenance instructions.
The necessity of using the correct oil and keeping the crankcase full
cannot be over emphasized. Failure to do so will cause excessive
engine wear and shorten its useful life.
Before starting the engine, Check the coolant level in the radiator. If
it is low, rell as specied in the engine manufacturer’s maintenance
instructions. The radiator should be lled to about 1 inch below the ller
neck.

9
REV B OPM-111
battery negative cable. When removing the battery cables from the
battery, reverse the procedure and disconnect the negative cable
rst and then the positive cable.
5. Be sure all connections are tight and coat the terminals and cable
ends with dielectric grease.
WARNING:
The electrolyte is a diluted sulfuric acid that is harmful to the skin
and eyes. It is electrically conductive and corrosive, The following
precautions must always be taken.
1. Always wear full eye protection and protective clothing.
2. Where electrolyte contacts skin, wash off immediately with water.
3. If electrolyte contacts the eyes, ush immediately and thoroughly
with water. Seek immediate medical attention.
4. Spilled electrolyte is to be washed down with an acid neutralizing
agent. A common practice is to use a solution of one pound of
biocarbonate of soda (baking soda) to one gallon of water. The
biocarbonate of soda is to be added until the evidence of reaction,
foaming, has ceased the resulting liquid is to be ushed with water
and the area dried.
DANGER: EXPLOSIVE FIRE RISK:
Never smoke near batteries
Do not cause a ame or spark in the battery area.
Always discharge static electricity from your body before touching
batteries by rst touching a ground metal surface.
SERVICING BATTERIES
Batteries used on these units may over time lose water. This is
especially true if you are using a trickle charger to maintain your
battery. When relling the battery with water, use only distilled water.
Tap water will shorten the service life of the battery.
Never ll the battery above the ll line. Over lling above the upper
level line may cause electrolyte to overow, resulting in corrosion to
the engine or nearby parts. Immediately wash off any spilled electrolyte
following the procedure above.
BATTERY CHARGING
This generator is equipped with an engine mounted alternator that will
recharge the battery during operation. It is not necessary to have the
battery charger circuit on the emergency distribution circuit.
CAUTION: EQUIPMENT DAMAGE:
Always connect the positive cable rst and the negative cable last.
When disconnecting, remove the negative cable rst and the positive
cable last. Failure to connect and disconnect in the proper sequence
can cause equipment damage.
Observe polarities: connect the positive (+) battery terminal to the
(+) cable from the engine starter; the negative (-) battery terminal is
connected to the negative cable (ground) from the engine generator
assembly. All connections must be clean and tight. Check the
electrolyte (uid) in the battery periodically to be sure it is above the
plates. Never allow the battery to remain in a discharge condition.
CAUTION: EQUIPMENT DAMAGE:
NEVER JUMP START these units. Doing so will destroy the engine
control module, rendering the unit non-operational. Remove and fully
recharge the battery before attempting to start.
CONNECTING THE BATTERY CHARGER & BLOCK
HEATER
A three-stage battery charger is provided standard for all 12 volt
standby systems. The standard charger is an Automatic Battery
Charger & Maintainer. This Charger has three rates of charging.
During the rst stage, know as BULK Charging, the charging current
is limited to 2 Amps at a voltage of up to 14.5 volts. The green LED
will blink during this stage. During stage two, know as ABSORPTION
Charging, the charging voltage is held at 14.5 volts and the charging
rate gradually reduces the amount of current (amps) owing to the
battery. The green LED will also blink during this stage. Stage three
is called MAINTENANCE Charging. During this stage the voltage will
drop to 13.3 volts and the charge rate will drop to as low at .1 amps.
This keeps your batteries in a fully charged condition without over
charging them. During this stage the green LED is constantly lit. There
are optional 5 and 10 amp chargers available that may be installed on
some units
The block heater is thermostatically controlled and when plugged in
will maintain the engine coolant temperature between 100 and 120
degrees F.
NOTICE:
The trickle charger is not intended to recharge a battery which has
become completely discharged. It is designed to produce just enough
current to maintain a fully charged battery.
The battery tender and block heater are powered by a customer
supplied GFCI circuit and installed in accordance with the United
States National Electric Code. These AC wires can be run in the same
conduit as the other AC leads from the generator. It is suggested that
this circuit be fused for 20 amps when the block heater and battery
charger are on shared circuits and two 15 amp circuits when they
are split. Splitting the battery charger and block heaters circuits are
advantageous that if one of the components fail in a manner causing
the breaker to trip the other component will be unaffected and continue
operating normally.
The block heater and battery charger are both hard wired into a
terminal block located in the AC wiring cabinet.

10 REV BOPM-111
Wire Temperature Rating
Cu Conductor Al Conductor
kW Volts PH Amp 75°C 90°C 75°C 90°C
21 120/240 1 90 #2 AWG #3 AWG 1/0 AWG #2 AWG
21 120/208 3 80 #3 AWG #4 AWG #2 AWG #3 AWG
21 120/240 3 80 #3 AWG #4 AWG #2 AWG #3 AWG
22 277/480 3 35 #8 AWG #8 AWG #4 AWG #6 AWG
30/27 120/240 1 125 1/0 AWG #1 AWG 3/0 AWG 2/0 AWG
30/28 120/208 3 100 #2 AWG #3 AWG 1/0 AWG #1 AWG
30/28 120/240 3 100 #2 AWG #3 AWG 1/0 AWG #2 AWG
30/28 277/480 3 45 #6 AWG #8 AWG #4 AWG #6 AWG
For additional information on wire sizing refer to table 310-16 of the
National Electrical Code ANSI/NFPA 70.
C - Ground Lug, These ground lugs are bonded to ground and are
provided for you to connect your ground wire from the transfer switch
to. The lugs on the 21/30 kW will accommodate #6 AWG to 250 MCM
and should be torqued to 50 in. lbs.
D. 120 Volt Terminal Block. These terminals are for shore power. For a
power line with one lead, plug into either terminals, ensuring the jumper
is still connected. To isolate two leads for use of two separate circuit
breakers, the jumper must be removed.
WARNING: EQUIPMENT DAMAGE:
When installing a three-phase 240 Volt system, be sure you know
which lead is the high voltage “wild” leg (208 Volt to neutral). The
generator normally carriers the high voltage on the G2 lead.
The load current carrying wires (L) and (T) must be sized to handle
the maximum load current without excessive voltage drop. By code,
the wire must be heavy enough to handle the full current rating of
the mainline circuit breaker (or fuse) in the entrance (or sub-panel)
protecting the contactor switch.
All wires should be installed in rigid or exible conduit. (knockouts are
provided in the control box).
GROUNDING
A grounding lug has been provided on the engine generator set. Check
your local codes for proper grounding requirements.
AC ELECTRICAL CONNECTIONS
NOTICE:
CLASS 1 WIRING METHODS ARE TO BE USED FOR ALL FIELD
WIRING CONNECTIONS TO TERMINAL OF A CLASS 2 CIRCUIT.
WARNING:
A mainline circuit breaker has been provided inside the generator
housing. During all wiring installation, make sure the breaker is in the
off position and the generator operators switch is in the off position.
A - Neutral Lugs, These neutral lugs are isolated from ground and
provided for you to connect your neutral wire from the transfer
switch. The lugs on the 21 kW will handle wire sizes #12 AWG to 2/0
AWG and should be torqued to 50 in lbs. The lugs on the 30 kW will
accommodate #12 AWG to 2/0 AWG and should be torqued to 50 in
lbs.
B - Generator Circuit Breaker, This circuit breaker provides overload
protection for the generator. Your power feeds from the transfer switch
will connect to the bottom lugs on the circuit breaker. The generator
power feeds have already been wired into the upper lugs.
The table below gives you the circuit breaker size, lug wire sizes and
torque specication. (see the actual breaker for additional information
and restrictions)
kW Volts PH Amp Wire Capability Lug Torque
21 120/240 1 90 #12 AWG-2/0 AWG 50 in lbs
21 120/208 3 80 #12 AWG-2/0 AWG 50 in lbs
21 120/240 3 80 #12 AWG-2/0 AWG 50 in lbs
22 277/480 3 35 #14-#10 AWG 80 in lbs
30/27 120/240 1 125 #12 AWG-2/0 AWG 50 in lbs
30/28 120/208 3 100 #12 AWG-2/0 AWG 50 in lbs
30/28 120/240 3 100 #12 AWG-2/0 AWG 50 in lbs
30/28 277/480 3 45 #14-#10AWG 80 in lbs
The previous table shows the minimum conductor sizes between the
generator and the ATS, based on wire type and temperature rating.
Wire has been derated 40° C ambient temperatures.
A
C
B
D

11
REV B OPM-111
DC ELECTRICAL INTERCONNECTION
CAUTION:
Never run the AC and DC wiring on the same conduit.
NOTE:
There are various DC connectors on the engine that have nothing
connected to them. This was done intentionally, the connectors are for
END OF THE LINE TESTING and other diagnostic tests. They are not
used during normal operations and can just be ignored.
All DC connections are completed on the terminal strip just below the
engine control cabinet.
A - Customer Remote Start CONNECTIONS TERMINALS. The two
remote start leads from the Automatic Transfer Switch are connected
to the two terminals marked Remote Start & Remote Start. The wire
in terminal labeled #1 is Battery Negative/Ground and the wire in the
terminal labeled #23 is your Remote Start lead. Closing these two
leads together will signal the DSE 7310 MKII to go into an autostart
mode and start up the engine generator.
Depending on the distance, 14 to 16 gauge stranded wire should be
used. It is suggested that these wires be labeled S1 and S23.
Note: Any relay closure can be used to start and stop this generator. As
long as the contact stays closed the engine generator set will continue
to run. Once the relay is opened the unit will shut down and remain in
the standby mode until the remote start relay is closed again.
B - ESTOP- & ESTOP+. Remote Emergency Stop terminals. These
two terminals are shipped with a jumper installed. If your application
requires the installation of a Remote Emergency Stop switch, remove
the jumper and wire your switch to these terminals. This unit will not
start and run without either the jumper installed or a remote N/C switch
installed..
C - Battery Charger Failure. Battery charger failure relay input from
remote battery charger to DSE7310 controller.
D - Remote Display Panel Interface Terminals. These interface
terminals are pre-wired to allow for the connection of a remote display.
This display allows for the remote annunciation of alarms at a location
such as a nurses station or a control room.
D
C
B
A
E
MOUNTING THE AUTOMATIC TRANSFER SWITCH
See the ASCO installation manual for additional details on proper
wiring of the Automatic Transfer Switch.
Because of the many different types of service, feeder, and distribution
equipment, no specic wiring instructions can be provided. It is
recommended that only copper wire be used. In all cases it is
essential that while the load is connected to the generator, there can
be absolutely no feedback from the generator to the power line or the
power line to the generator. When properly installed, the normal A.T.S.
Control and safety systems will eliminate all paths for feedback.
To wire the automatic transfer switch into the existing wiring, rst
determine which circuits will be on the emergency load circuit. If the
entire load is to be transferred, the transfer switch can be wired in
directly after the watt-hour meter and the service entrance, providing
the service entrance ampere rating is within the transfer switch’s rated
capability.
If only specic circuits are to be powered under emergency power
failure conditions, an additional distribution panel designated
“emergency distribution panel” must be installed.
All selected emergency circuits are removed from main distribution
panels and installed in the emergency distribution panel. The A.T.S. is
then installed between the main panel and the emergency distribution
panel. Suggested circuits: freezer, refrigerator, furnace, emergency
lights, sump pump, emergency outlet circuits, etc. Total running load
must not exceed generator rating.
WARNING:
A service disconnect must be installed in front of the ATS panel as
the ATS is not service entrance rated. This will allow you to test the
generator under load. Should you ever have to work on the switch,
you will be able to disconnect the power and work on the switch cold
without having the power company pull your meter.
To wire the automatic transfer switch into the existing wiring, rst
determine which circuits will be on the emergency load circuit. If the
entire load is to be transferred, the transfer switch can be wired in
directly after the watt-hour meter and the service entrance, providing
the service entrance ampere rating is within the transfer switch’s rated
capability.
If only specic circuits are to be powered under emergency power
failure conditions, an additional distribution panel designated
“emergency distribution panel” must be installed.
All selected emergency circuits are removed from main distribution
panels and reinstalled in the emergency distribution panel. Suggested
circuits: freezer, refrigerator, furnace, emergency lights, sump pump,
emergency outlet circuits, etc. Total running load must not exceed
generator rating.

12 REV BOPM-111
E - Battery Positive and Ground ( battery negative). These terminals
are dedicated for any accessory that will be installed. There is a
maximum of 7 Amps combined.
DC INTERCONNECTIONS TO AUTOMATIC TRANSFER SWITCH
Two control wires are required between the ATS panel and the
generator control terminal box. Depending on the distance, 14 and 16
gauge stranded wire should be used. These wires should be labeled
S1 and S23.
WARNING:
Be sure engine generator is in the OFF position before you make any
DC interconnections.
ASCO 185 UL SWITCH
Your DC connection points in the ASCO 185 UL ATS are on the
terminal block on the bottom of the controller in the lower left hand
corner of the ATS panel. The terminal block (TB7) is numbered 1
through 9. These terminals will accept # 22 - # 14 AWG stranded wire.
It is recommended that you use # 16 AWG for distances up to 200
feet. You need to run two (2) wires from the engine generator set to the
transfer switch. You will be using terminals 4 and 5, wire Start # 23 will
connect to terminal # 5 and wire Battery Negative # 1 will connect to
terminal # 4. See the following table and illustration.
Your DC connection points in the ASCO 185 ATS are terminals “4”
and “5” on the interface terminal block. As this is a “DRY” unpowered
contract set it set, it makes difference which lead (battery negative #1
or start #23) connect to which terminal.
135060-00 60708-165
A - Customer Remote Start CONNECTIONS TERMINALS. The
two remote start leads from the Automatic Transfer Switch are
connected to the two terminals marked GROUND & START. The
wire in terminal GROUND is Battery Negative and the wire in the
terminal labeled START is your Remote Start lead. Closing these
two leads together will signal the DSE 7310 to go into an auto-
start mode and start up the engine generator.
Depending on the distance, 14 to 16 gauge stranded wire
should be used. It is suggested that these wires be labeled S1
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use terminal lugs on all wires and the screws should be torqued
to 9.6 in. lbs.
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B - ESTOP- & ESTOP+. Remote Emergency Stop terminals.
These two terminals are shipped with a jumper installed. If your
application requires the installation of a Remote Emergency
Stop switch, remove the jumper and wire your switch to these
terminals. This unit will not start and run without either the
jumper installed or a remote N/C switch installed..
C. - Battery Charger Failure. Battery charger failure relay input
from remote battery charger to DSE7310 controller.
D - Remote Display Panel Interface Terminals. These
interface terminals are prewired to allow for the connection of a
remote display. This display allows for the remote annunciation
of alarms at a location such as a nurses station or a control
room. This display can used to meet the remote annunciation
requirements of NFPA 110 standards. (This feature meets the
annunciation requirements in applications requiring NFPA110
level one protection.)
DC Interconnections to the
Automatic Transfer Switch
*************
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you make any DC interconnections.
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ASCO 185 UL SWITCH
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ASCO 300 UL SWITCH
Your DC connection points in the ASCO 300 ATS are terminals
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located in different locations.
TB7
removable
terminal block
TB7–4, TB7–5, TB7–6
123456789
Figure 4. TB7 generator starting contact terminals.
Table A. Generator Start Connections
When the Utility fails Terminals on Controller
contact closes TB7–4 and TB7–5
contact opens TB7–5 and TB7–6
ASCO 300 UL SWITCH
Your DC connection points in the ASCO 300 ATS are terminals “14 and
“15”. Depending on the size of the switch they are located in different
locations. As this “DRY” un-powered contact set it makes no difference
which lead (battery negative #1 or start #23) connect to which terminal.
STARTING PROCEDURE
CONTROL LAYOUT
STOP/RESET - This button places the module into its Stop/Reset
mode. This will clear any alarm conditions for which the triggering
criteria have been removed. The fuel supply de-energizes and the
engine comes to a standstill. Should a remote start signal be present
while operating in this mode, a remote start WILL NOT occur.
MANUAL MODE - This button places the module into its Manual
Mode. Once in Manual Mode, the model responds to the Start button
to start the generator and run it off load.
START - Pressing this button from STOP/RESET will start the engine
and run the load.
AUTO MODE - This button places the module into its Auto Mode.
This mode allows the module to control the function of the generator
automatically.
ALARM/LAMP TEST - This button silences the audible alarm in
the controller, deactivates the Audible Alarm output (if congured)
and illuminates all of the LEDs on the module’s face as a lamp test
function.
MENU NAVIGATION - Used for navigating the instrumentation, event
log, and conguration screens.
PROTECTIONS
When an alarm is present, the common alarm LED if congures will
illuminate. The LCD display will show an icon to indicate the failure.
WARNINGS
Warnings are non-critical alarm conditions and do not affect the
operation of the generator system, they serve to draw the operator’s
attention to an undesirable condition. Warning alarms are self-resetting
when the fault condition is removed. The icon will appear steady in the
display.
SHUTDOWN
Shutdowns are critical alarm conditions that stop the engine and draw
the operator’s attention to an undesirable condition. Shutdown alarms
are latching. The fault must be removed and the STOP/RESET button
pressed to reset the module. The icon will be ashing in the display.

13
REV B OPM-111
INITIAL START UP
WARNING: EQUIPMENT DAMAGE:
Before attempting to start this unit, complete your pre-start checklist
and ensure the generator mainline circuit breaker is in the proper
position prior to starting. Starting this unit without it properly connected
can cause serious personal injury or equipment damage.
DO NOT jump start these engine-generator sets. Starting these units
on a low battery or jump starting them will cause damage to the engine
control module.
Use the following check list to verify correct installation before starting
the engine.
□Engine oil. Fill as required with proper grade/qty.
□Engine coolant. Fill as required with proper mixture.
□Unit mounting base properly bolted down.
□Clearance for service and maintenance on all sides.
□Proper fuel line material and size.
□All fuel line connections tight.
□Battery connections clean and tight
□Battery fully charged.
□All AC and DC wiring installed and properly protected.
□Compressor oil. Fill as required with proper grade/qty.
After completing the previous checklist, the engine-generator set is
ready for initial start-up.
MANUAL MODE
1. Press and release the MANUAL MODE button. The small LED light
next to it should come on.
Note: There is no start delay in this mode of operation.
2. Press and release the green START ENGINE button. The DSE 7310
MKII will send two signals to the engine. The first signal wire #21 will
engage the fuel solenoid, the second wire, #22, will engage the starter
on the engine. At this point the DSE7310 will start the cranking cycle
(10 seconds on and 10 seconds off).
Note: Wire #93 is energized to turn on the glow plugs for 15 seconds
first and then the starter and fuel solenoid are engaged.
If the engine fails to start during this cranking period, the starter motor
is disengaged and goes into a rest mode after which a second attempt
is made to start the engine. Should this sequence continue through 3
cranking cycles the start sequence will be stopped and the display will
show ‘FAILED TO START”.
3. During manual operation, the load will not normally be applied to the
generator. But caution must be used, if the line power should fail or be
turned off the transfer switch during manual operation the load may be
applied to the generator.
With the engine running smoothly check the no load voltage and
frequency on the digital display. The voltage should be 208/240/480 AC
depending on which model you have and a frequency of 59.5 to 60.5
hertz (Hz).
If you have the proper voltage at the generator the next step is to
check the voltage at the generator terminals in the Automatic Transfer
Switch. The voltage between the G1 and the G3 terminals should be
the same as it was on the generator front panel. The voltage should
also be checked between the hot terminals (G1 and G3) and the G-N to
be certain of a balanced voltage output and a solid neutral connection.
The voltage between G1 and G-N should be about 120 volts AC (277
on 480 units). The same approximate voltage should be found between
terminals G3 and G-N (120 volts AC).
On three phase panels the G2 voltage level should also be checked.
ON 240 VOLT (DELTA) SYSTEMS BE SURE YOU KNOW WHERE
THE HIGH VOLTAGE “WILD” LEG IS. IT MUST BE IN THE SAME
LOCATION ON THE LINE SIDE AS IT IS ON THE GENERATOR SIDE.
(i.e. if it’s on L-3 on the line side it must be on G-3 on the generator
side. Also on three phase systems make sure that the rotation
is the same on the generator as it is on your line power. Failure
to insure proper rotation will cause three phase motors to spin
backwards possibly damaging them.
NOTICE:
If for any reason during the check out procedure the voltage and
frequency are not correct, depress the STOP/RESET button and
correct the trouble before proceeding.
4. Stopping - There are two ways to stop the unit when it is in the
manual mode. Pressing the STOP/RESET button will stop the unit
immediately. Pressing the AUTO mode button will stop the unit but only
after the cool down timers have timed out and there is no remote start
signal being sent to the unit.
AUTO MODE
To activate the automatic start mode you will just need to depress the
AUTO button, the LED indicator beside the button conrms that the unit
is in automatic mode.
To test the Automatic Transfer Switch, follow the instruction on the
operator’s manual that came with the transfer switch. If you get a fault
during the initial start up or prior to start up, it is most likely a false
warning light. Simply reset the ATS start over.
Once you have completed testing of the ATS, be sure you ALWAYS
leave the system in the standby mode,unless servicing the unit. For
standby operation, press the AUTO button on the front of the control.
The green light should light up next to the AUTO button.
NOTE: For setting the exerciser circuit, for all ATS, see the operator’s
manual shipped with the ATS.

14 REV BOPM-111
TROUBLE SHOOTING TABLES
UNIT WILL NOT
CRANK WHEN THE
POWER FAILS
1. Digital genset controller not in “AUTO”
2. Transfer control switch not in “AUTOMATIC”.
3. Incorrect wiring between transfer switch and
generator.
4. Loose or dirty battery terminals.
5. Defective engine control module.
6. Defective starter.
7. Defective start solenoid.
8. Defective start/stop control in the transfer
switch.
9. ATS panel in fault from previous run cycle.
10. Blown fuse on generator control panel.
ENGINE WILL NOT
CRANK USING START
BUTTON ON THE
GENERATOR
1. Low or dead battery, must hold 12 Volts during
cranking.
2. Blown fuse on generator control panel.
3. Loose or dirty battery terminals.
4. Defective engine control module.
5. Defective starter.
6. Defective start solenoid.
7. Locked up engine generator set.
ENGINE CRANKS BUT
WILL NOT START
1. Improper fuel pressure being delivered to unit.
2. Fuel supply shut-off.
3. Fuel supply empty.
4. Defective spark plug.
5. Defective engine ignition module.
6. Dirty air cleaner lter
7. Defective fuel solenoid valve.
8. Low Voltage from battery to fuel solenoid,
must hold 12 Volts during cranking.
9. Defective fuel regulator.
10. Defective starter/fuel solenoid relay(s).
ENGINE START AND
THEN STOPS -
Alarm light comes on
1. Engine is low on oil
2. Engine has high water temperature.
3. Engine has overspeed.
4. Engine has gone into overcrank.
5. No output from engine alternator to engage
stop crank cycle.
6. Generator is not operating at the correct speed.
7. Defective ECU on the engine.
ENGINE WILL NOT
COME UP TO SPEED
AFTER IT STARTS
1. Insufcient fuel volume getting to the unit.
a. Fuel line too small. b. Low fuel pressure.
2. AC short circuit.
3. Defective ECU on the engine.
4. Governor is defective.
ATS PANEL WILL
NOT TRANSFER TO
EMERGENCY SUPPLY
1. No AC generator out put from generator.
2. See Automatic Transfer Switch Manual.
ATS PANEL WILL NOT
PULL IN ON NORMAL
POWER
1. See Automatic Transfer Switch Manual.
NO AC OUTPUT FROM
GENERATOR
1. Defective diodes.
2. Defective voltage regulator.
3. Defective rotor.
4. Defective stator.
5. Defective exciter rotor.
6. Defective exciter stator.
7. AC short in the input leads.
8. Defective/Open breaker.
9. Wiring error.
VOLTAGE REGULATOR WIRING
AS540 Automatic Voltage Regulator
The following is a list of connections on the AVR. These have been
factory set and other than voltage adjustment, should never be
changed.
1. VOLTS
Adjust generator output voltage.
Clockwise to increase voltage.
2. LINK: HAND TRIMMER
1-2: NO TRIMMER
NONE: TRIMMER FITTED
Adjust alternator output voltage
Clockwise to increase voltage by AVR voltage adjustment (1)
3. STABILITY
To prevent voltage hunting.
Clockwise to increase the dampening effect.
4. LINK: SUPPLY
LINK: 110V/120V
NONE: 240V
Select AVR supply voltage
5. UFRO - Under Frequency Roll Off
Clockwise decreases ‘KNEE’ point.
6. SWITCH: UFRO FREQUENCY
SWITCH LEFT: 60Hz
SWITCH RIGHT: 50Hz
Select alternator frequency for UFRO
7. LED Indicator Light
LED light on in UFRO or O/EXC condition
8. O/EXC
Adjust over-excitement trip.
Clockwise to increase trip voltage.
9. LINK: SUPPLY
8-Z2: MAIN STATOR
NONE: AUX WINDING
Select AVR supply source.
1
92
7
6
4
3
8
5

15
REV B OPM-111
WARNING:
Never jump start these units. Jump starting these units with low or bad
batteries will cause permanent damage to the engine control module.
MAINTENANCE SCHEDULE
SERVICE INTERVALS
Check Engine Oil Level Daily
Check Coolant Level and for Leakage Daily
Change Engine Oil and Filter Every 250 hrs
Check LPG System for Leaks Prior to Service
Inspect Accessory Drive Belt for Cracks, Breaks, Splits, Glazing Every 250 Hrs
Clean Debris From Radiator Core Every 250 hrs
Inspect Coolant Every 250 Hrs
Inspect Spark Plugs Every 1000 Hrs
Inspect Distributor Cap and Rotor Every 1000 Hrs
Inspect Spark Plug Wires Every 1000 Hrs
Inspect Air Filter Every 500 Hrs
Replace Air Filter Every 1000 Hrs
Inspect Lock-Off Valves Every 1000 Hrs
Check Fuel Lines for Leaks Every 250 Hrs
Inspect Oxygen Sensor Every 1000 Hrs
Inspect PCV System Every 1000 Hrs
* There are additional maintenance items and explanations in the
engine operator’s manual. Read thoroughly before operating this unit.
PREVENTATIVE MAINTENANCE
Reasonable care in preventative maintenance will ensure high
reliability and a long life for the engine-generator set and Automatic
Transfer Switch.
WARNING:
When performing any type of maintenance on this equipment, make
sure the selector switch on the engine-generator is in the off position.
If you are working in the Automatic Transfer Switch, conrm with a
reliable meter that all power has been disconnected.
AUTOMATIC TRANSFER SWITCH
Clean and inspect the switch once a year. De-energize all power
sources, both line and engine-generator set, then brush and vacuum
away any excessive dust or dirt accumulation. At this time, with the
conductor de-energized, you can remove the contact covers and check
the contacts. Make sure contacts are clean and not burned or pitted.
ENGINE-GENERATOR SET
Service the engine in accordance with the engine manufacturer’s
manual provided with your new equipment. Routinely remove debris
and dirt from around the inside generator enclosure. Ensure that the air
intakes are free from leaves and other debris at all times.
Clean and inspect battery terminals at least twice a year. Also check
the battery water level at least twice a year.
Other than keeping the generator clean and free of debris, there is
no other routine or preventative maintenance required as long as the
generator is run bi-weekly to keep it dry and in good working order.
COLD WEATHER OPERATION
Extreme cold weather operation requires special considerations. Higher
CCA batteries are required for cold weather starting; 650 CCA or larger
are recommended. In addition, you should consider installing an oil
heater kit and a battery warmer for reliable starting during cold weather.

16 REV BOPM-111
THREE PHASE WIRING - DELTA
PSS21 AND PSS30
OUTLINE DRAWING
ENCLOSED
OPEN SKID

17
REV B OPM-111
THREE PHASE AC WIRE HIGH AND LOW WYE
24 5060-0060708-165
THREE PHASE AC WIRING
HIGH AND LOW WYE
THREE PHASE-LOW WYE
120/208 VOLTS
THREE PHASE-HIGH WYE
277/480 VOLTS
24 5060-0060708-165
THREE PHASE AC WIRING
HIGH AND LOW WYE
THREE PHASE-LOW WYE
120/208 VOLTS
THREE PHASE-HIGH WYE
277/480 VOLTS
THREE PHASE - HIGH WYE 277/480V THREE PHASE - LOW WYE 120/208V
5060-00 60708-165
THREE PHASE -DELTA
120/240 VOLTS
THREE PHASE AC
WIRING - DELTA
SINGLE PHASE
120/240 VOLTS
SINGLE PHASE AC
WIRING - 4 LEAD
THREE PHASE WIRING - DELTA
THREE PHASE DELTA 120/240V
SINGLE PHASE AC WIRING - 4 LEAD
5060-00 60708-165
THREE PHASE -DELTA
120/240 VOLTS
THREE PHASE AC
WIRING - DELTA
SINGLE PHASE
120/240 VOLTS
SINGLE PHASE AC
WIRING - 4 LEAD
SINGLE PHASE 120/240V

18 REV BOPM-111
ENGINE HARNESS SCHEMATIC
6
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19
REV B OPM-111
DSE 7310 MKII WIRING DIAGRAM
',*,7$/,13876
02'8/(0.,,
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20 REV BOPM-111
WINCO INC. • 225 S. CORDOVA AVE. • LE CENTER, MN 56057 • 507-357-6821
24 MONTH LIMITED WARRANTY
WINCO warrants to the original purchaser for 24 months or 2000 hours, whichever occurs rst, that goods manufactured or supplied by it will be
free from defects in workmanship and material, provided such goods are installed, operated and maintained in accordance with WINCO written
instructions and applicable codes.
WINCO’s sole liability, and Purchaser’s sole remedy for a failure under this warranty, shall be limited to the repair of the product. At WINCO’s
option, material found to be defective in material or workmanship under normal use and service will be repaired or replaced. For warranty service,
return the product within the warranty period, to your nearest WINCO Authorized Service Center or to WINCO in Le Center Minnesota.
Duration For Standby Applications
Parts, Travel, & Labor: 24 Months
EXCLUSIONS:
• Warranty is for standby applications only. Prime/Mobile applications are not covered under this warranty.
• Normal maintenance consumables or labor.
• This warranty only covers travel time that has been pre-approved by the WINCO Service Department. Mileage or labor for removal or re-
installation of WINCO product from its application is not covered.
• Normal wear and tear.
• Costs of rental equipment.
• WINCO does not warrant engines. Engines are covered exclusively by the warranties of their respective manufacturers.
• WINCO does not warrant component parts that are warranted by their respective manufacturers.
• WINCO does not warrant modications or alterations which were not made by WINCO.
• WINCO does not warrant products which have been subjected to misuse and/or negligence or have been involved in an accident.
Proof of proper maintenance must be furnished upon request.
THERE ARE NO EXPRESS WARRANTIES OTHER THAN THOSE DESCRIBED HEREIN. THERE ARE NO OTHER WARRANTIES,
EXPRESSED OR IMPLIED, OR OTHERWISE CREATED, INCLUDING BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, OR
WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE.
WINCO is liable for the repair or replacement of the product only and is not liable for incidental or consequential damages as permitted by your
state. This warranty gives you specic legal rights which may vary from state to state.