Winco DE4040F4 Setup guide

INSTALLATION AND
OPERATORS MANUAL
DE4040F4-XX/3
GENERATOR
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 # ________________________________________
www.wincogen.com
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2
OPM-141/E
TABLE OF CONTENTS
SAVE THESE INSTRUCTIONS 2
SAFETY INFORMATION 3
SAFETY DEFINITIONS
SPECIFICATIONS 4
DE4040F4 4
INTRODUCTION 5
TESTING POLICY
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 specified
by the manufacturer of applicable engines.
PRODUCT DESCRIPTION
PREPARING THE UNIT 6
START-UP CHECK LIST
UNPACKING
LIFTING THE GENERATOR SET
INSTALLATION 7
GENERAL INFORMATION
ENGINE GENERATOR SET MOUNTING
VENTILATION REQUIREMENTS
EXHAUST INSTALLATION
FUEL INSTALLATION
INSTALLING THE FUEL LINE
ELECTRICAL CONNECTIONS
GENERATOR CIRCUIT BREAKER
GROUNDING
TRANSFER SWITCH
DC WIRING
INSTALLING THE BATTERY
SERVICING BATTERIES
BATTERY CHARGER
& BLOCK HEATER
STARTING PROCEDURE 12
LUBRICATION
COOLANT
PRE-START CHECK LIST
CONTROL LAYOUT 13
MANUAL MODE
AUTO MODE
CONTROL POWER
OPERATING CONDITIONS 15
NORMAL OPERATION
HARSH ENVIRONMENTS OPERATIONS
COLD WEATHER OPERATIONS
AIR COMPRESSOR 16
AIR COMPRESSOR SPECIFICATIONS
START UP
ADJUSTING AIR PRESSURE
ADJUSTING THE BELT
AIR COMPRESSOR MAINTENANCE
CHECKING THE OIL LEVEL
CHANGING THE OIL
CHANGING THE OIL FILTER
REPLACING FINE SEPARATOR CARTRIDGE
REPLACING THE AIR INTAKE FILTER
ENGINE MAINTENANCE 19
CHANGING THE OIL
CHANGING OIL FILTER
REFILLING COOLANT
CHANGING AIR FILTER
CHECKING WATER IN PRE-FILTER
CLEANING RADIATOR
REPLACING BLOW-BY FILTER
STORAGE
TROUBLE SHOOTING 22
ENGINE-GENERATOR SET
MAINTENANCE SCHEDULE 22
COMPRESSOR
FLOW DIAGRAM
ENGINE CODES 24
WIRING SIZE TABLE 30
ENGINE HARNESS 31
DSE7310 WIRING DIAGRAM 32
WIRING DIAGRAMS 33
CA EMISSION CONTROL WARRANTY 34
US ENVIRONMENTAL WARRANTY 35
REVALIDATION OF WARRANTY 35
LIMITED WARRANTY 36
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.

3OPM-141/E
SAFETY INFORMATION
SAVE THESE INSTRUCTIONS
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 fire. 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.
CALIFORNIA PROPOSITION 65
WARNING: This product contains crude oil,
gasoline, diesel fuel and other petroleum
products, Antifreeze to which can expose you
to chemicals including toluene and benzene,
Ethylene glycol (ingested) which are known to the
State of California to cause cancer, birth defects or other
reproductive harm and developmental issues.
For more information go to www.P65Warning.ca.gov.
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, installation
must meet the national electrical code.
2. FIRE HAZARD -
Gasoline and other fuels present a hazard of possible
explosion and/or fire.
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 flame near the generator
set or fuel tank.
D. Keep a fire 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 gasoline 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, floors).
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 fire hazard.
C. Carefully clean up any gas or oil spills before starting
the unit.
D. Do Not use the generator area as a storage closet.
6. SERVICING EQUIPMENT -
All service, including the installation or replacement of
service parts, should be performed only by a qualified
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 mufflers, 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.

4
OPM-141/E
SPECIFICATIONS
DE4040F4
MODEL DE4040F4-3 DE4040F4-4 DE4040F4-17 DE4040F4-18 DE4040F4-21
GENERATOR
Watts 40,000 40,000 40,000 40,000 40,000
Volts 120/240 120/208 120/240 277/480 346/600
Phase Single Three Three Three Three
PF 1.0 .80 .80 .80 .80
Amps 166 139 120 60 48
Hertz 60 60 60 60 60
ENGINE
Model FPT F5 C
Starting System 12 Volt
Fuel Consumption (full load) 4.16 Gal/hr
Fuel ASTM D-975 - 2D*
Oil Type See Lubrication section in this manual
Oil Capacity 10 Quarts
Cooling System 50/50 mix
*See engine manual for additional fuel types and specifications
GENERATOR RESISTANCE (all value at 22°C)
Model Stamford UCI224D
Winding Group 311
Rotor 0.64 Ω
Stator 0.086 Ω
Exciter Rotor 0.071 Ω per phase
Exciter Stator 21 Ω

5OPM-141/E
INTRODUCTION
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 specified
by the manufacturer of applicable engines.
PRODUCT DESCRIPTION
The engine-generator set consists of a multi-cylinder, liquid-
cooled engine nominally operating at 1800 RPM. This
generator set meets current EPA regulations for standby
or prime power use. The generator frequency regulation
is maintained by the engine electronic governor to within
+/- 0.5 Hertz. The generator is connected to the engine
flywheel via flexible drive disks. The generator set is skid
mounted with isolation mounts between the engine and
base.
NOTICE:
A Customer supplied 12 Volt battery is required to complete
the installation. Battery requirements are listed later under
the battery installation section.
The generator ships with an advanced DSE7310 digital
controller. The DSE7310 will electronically display useful
engine and generator performance information. The
controller starts and stops the generator and monitors
critical operating parameters and will shut the generator
down to protect the engine from damage.
GENERATOR SET:
Every WINCO generator set has its own unique identity
data plate. This data plate identifies the complete unit
model number, the system serial number, and has links to
the individual components that form the generator set in
our factory records. Several of the major components also
have their own individual data plates providing additional
information to document build data for warranty and
replacements parts. Be sure to have the main WINCO unit
data plate information recorded inside the front cover
of this manual for future reference and for identification
whenever requesting field or factory assistance.
Primary fields needed for assistance are complete model
number and serial number.
ENGINE:
This manual covers specific operation of the combined
engine generator set. The basic engine information
provided in this manual is not suitable for all operating
conditions. Refer to the engine operators manual for more
detailed operation and maintenance information.
CAUTION: EQUIPMENT DAMAGE
Be sure to check the engine oil level frequently as specified
in the engine manual.
The engine manufacturer has established an excellent
worldwide engine service organization; engine service is
available from a nearby authorized dealer or distributor.
Go to the WINCO website for a list of engine dealers
(wincogen.com) or contact the WINCO Service Department.
The rated power of each engine-generator is limited by
the temperature, altitude, and all other ambient conditions
specified by the engine manufacturer.
Derates
Above Sea Level
6,561 FT
9,842 FT
10%
20%
Coolant Temperature
>104°F 3% per 10°F
Units should not be operated in ambient temperature
greater than 125° Fahrenheit.
GENERATOR:
The nameplate includes a standby and prime/continuous
rating. The standby rating is the maximum amount of
power the generator set can produce. For prime power
applications the load should be equal to or less than the
prime power rating and the load is assumed to be variable.
It is acceptable to occasionally reach the standby rating
during prime operation to start motors or other temporary
surges.
WINCO generator sets use a brushless, AVR (Auto-Voltage
Regulator) controlled broad-range generator ends. The
generator converts rotational mechanical energy into
electrical energy. These WINCO units are equipped
with generators manufactured by Cummins Generator
Technologies. Each generator ‘end’ has its own data tag. A
unique serial number is on the data plate and the data label
is affixed to the main frame on the generator on the left
side.

6
OPM-141/E
PREPARING THE UNIT
START-UP CHECK LIST
A Start-Up Completion & Warranty Validation Form was
sent along with this manual. This must be completed and
returned to WINCO Inc. within 180 days of the factory
invoice date. If this form is not returned, the Warranty may
be voided.
UNPACKING
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 file 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 specification pages in this manual to
ensure that this unit meets your job requirements.
CAUTION: EQUIPMENT DAMAGE
These units are shipped with oil and a 50/50 mix of
coolant. Be sure to check all fluid levels before operating.
See engine manufacturer’s instruction manual for
recommended oil requirements before initial starting.
Once generator set is on-site:
1. Carefully remove the crate.
2. After inspecting the engine-generator for external,
physical damage, locate and check the following items
packed with the unit:
a. Installation and Operator’s Manual.
b. Engine manufacturer’s instruction manual.
c. Start-up and warranty validation form.
d. Battery hold-down brackets & hardware.
e. Unit components or accessory items shipped loose
for on-site installation.
f. Optional accessories.
3. Remove main frame hold-down bolts.
4. Unit can now be lifted from shipping rails.
LIFTING THE GENERATOR SET
NOTICE: PERSONAL INJURY
To prevent injury to persons or equipment, observe the
following guidelines when lifting the generator:
CAUTION:
Do not attempt to lift the generator set by the means of
the lifting eyes on the engine or generator end. These
lifting points are only for the use during the manufacturing
process and are designed for lifting of the individual
generator set components and not the complete unit.
WARNING
NEVER attempt to lift the fuel tank filled with fuel. Sloshing
of the fuel can cause a shift in the balance of the fuel
tank, making for a DANGEROUS, unbalanced lifting load.
If the generator was shipped on the fuel tank, use the
lifting points located on the fuel tank to move the entire
generator set into place. DO NOT PLACE FUEL IN THE
TANK PRIOR TO LIFTING.
This generator set is equipped with integrated fork pockets
to allow the generator to be lifted from any side.
Always use forklifts of a proper rating and with long
enough forks to move the generator. As the distance from
the forklift mast increases the lifting capacity for the forklift
decreases. When lifting from the side the forks should
extend the entire width of the unit through the opposite
side frame rail.
CAUTION: EQUIPMENT DAMAGE
It is possible to lift the generator from the radiator side. It
requires especially long forks and care should be taken to
ensure that no contact is made with the radiator. Pushing
the radiator will cause damage that is not covered under
warranty.
56.5”17.3” 2.8”

7OPM-141/E
INSTALLATION
The max continuous coolant temperature for this unit is
226°F. This unit should be installed in a well ventilated area,
ensuring the exhaust air cannot be recirculated back into
the engine.
CAUTION
This unit will get hot while it is running and for some time
afterward.
WARNING: PERSONAL INJURY
Before proceeding with the installation, be sure the engine
control is in the “stop” position and the emergency stop
depressed. Also, be sure the generator MLCB (main line
circuit breaker) in is the “off” position and the unit starting
battery is disconnected.
GENERAL INFORMATION
This series of engine-generator sets are designed and built
as open power units, meaning no weather protection has
been provided. These units must be installed inside of an
enclosure that will provide proper protection from the
elements.
The WINCO installation manual OPM-112 contains
additional information on indoor installations and
is available electronically through our website or by
requesting a copy from the factory.
Before beginning the installation process, recheck the
voltage, phase, and amperage rating of the generator
set. Be certain it can handle the intended load and are
compatible with the intended loads. Plans for installation
should be prepared with proper attention to mechanical
and electrical engineering detail to assure a satisfactory
system installation. The installation must comply with all
national, state, and local codes.
The information in this manual is offered only as a guide to
finalizing your installation plans and does not substitute for
sound engineering judgment for the specific application.
ENGINE GENERATOR SET MOUNTING
The unit’s main frame must be bolted securely to a solid
base. The engine-generator is mounted on channels which
are attached with special shock mounts to the main frame.
This allows the engine-generator free movement without
affecting the base or surrounding equipment.
WARNING: EQUIPMENT DAMAGE
Never mount these engine-generator sets to a wooden
base/structure. Over time, the wood will deteriorate and
the unit mountings will come loose. These units must be
mounted to a steel or concrete base.
VENTILATION REQUIREMENTS
WARNING: EQUIPMENT DAMAGE
It is the installer’s responsibility to ensure that there is
sufficient cooling air available to prevent the engine
and generator from over heating. Damage caused by
overheating is not covered by warranty.
Providing proper air movement during your installation
planning is essential. You will need to provide a fresh air
inlet as well as a hot air outlet (to the outside of protection
housing) for proper engine performance. These engine-
generator sets are equipped with unit mount radiators and
the engine is equipped with a pusher type fan. The hot
air from the face of the radiator must be ducted out of the
enclosure to ensure proper cooling. Failing to do so will
allow the hot air to recirculate around the radiator causing
the engine to overheat, resulting in an engine shutdown
and damage. If louvers are used in front of the hot air duct
to protect the unit from outside weather, the louvers should
be 1½ times as large as the area of the radiator face to
prevent back pressure.
This generator is equipped with a duct flange designed to
make installation simpler. The flange should not be placed
closer than 0.75 in. to the edge of the structure or other
solid surfaces. The radiator is mounted on rubber vibration
isolators that allow it to move. Placing the duct flange too
close to a wall can result in contact that will damage the
radiator resulting in costly repairs.
Foam or other seals can be used to form a tight lip forcing
all of the air from the engine fan out of the enclosure.
In addition to a hot air discharge, you must plan a fresh air
intake opposite the radiator discharge. The fresh air inlets
should be 1½ to 2 times larger than the radiator face. The
extra air inlet area is required to minimize restriction and
to provide combustion air for the engine. Do not block
fresh air intakes with other equipment as this will result
in insufficient air flow to the engine for cooling. Installing
them opposite the hot air discharge will allow a sweeping
flow of cooling air across the engine, preventing hot spots.
RADIATOR
DISCHARGE
FOAM SEAL
AIR INLET
DUCT
EXHAUST
THIMBLE

8
OPM-141/E
EXHAUST INSTALLATION
WARNING: PERSONAL INJURY
Improper exhaust installation will allow dangerous gases
to seep into enclosed spaces causing a hazard to your
health and/or death.
All exhaust must be piped out of the enclosure. When
selecting a location to exhaust fumes make sure that the
potential for contact with people is controlled. Exhaust can
enter buildings through windows, ventilation systems and
other openings if proper precautions are not followed.
The exhaust must be isolated from the vibration of the
engine. If the exhaust is connected in a rigid system it will
result in damage to the engine. The generator comes
equipped with an engine mounted flex pipe to aid your
installation. Ensure proper alignment with the generator.
The flex can be eliminated if it is pushed to one side to make
a connection.
The most direct path possible should be used to get to the
outside of the enclosure. Each bend restricts the pipe and
increases back pressure. It may be necessary to increase the
exhaust pipe diameter in some applications.
The exhaust pipe is very hot. When passing through the
structure it is critical that a thimble or other appropriate
technique is used to dissipate the heat and prevent the
structure from catching on fire.
Water in the exhaust pipe and especially the Diesel
Oxidation Catalyst (DOC) will cause damage to the engine.
It is preferable to exhaust out the side of the enclosures.
Slope the pipe slightly downward away from the engine
to cause any water in the exhaust to run away from the
engine. Do not exhaust near intake. Once outside the
enclosure a rain cap or other technique must be used to
keep water out of the exhaust. In mobile applications make
sure the rain flap faces to the rear of the vehicle so that it is
not blown open during transportation.
In many applications the DOC works as the muffler. If it is
desired to decrease engine noise further adding a muffler to
the exhaust system is possible. The muffler cannot increase
back pressure to more than 0.725 psi.
FUEL INSTALLATION
The fuel supply should be as close to the engine as
possible. This will reduce the installation cost of fuel runs
and minimize line losses. The diesel fuel supply should be
no more than 3 feet below the fuel inlet pump. If your
fuel supply is lower than 3 feet, you may have to install an
additional lift pump to bring the fuel up to the mechanical
fuel pump on the engine.
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
or information provided be interpreted to conflict with any
local, state, or national codes. If in doubt, always consult
your local fire marshal or fuel supplier.
INSTALLING THE FUEL LINE
Engine-generator sets are properly adjusted before they
leave the factory. Connecting a fuel supply with adequate
supply volume is critical to reliable operation. Diesel units
with optional base mounted fuel tanks are pre-plumbed to
the mechanical fuel pump on the engine.
Open skid mounted diesel units are often supplied with
capped inlet and return lines. The use of a suitable customer
supplied flexible fuel lines is essential between the engine
and fuel supply to provide a vibration break between your
fuel supply and the engine.
WARNING: FIRE DANGER:
Connecting rigid fuel line (i.e. steel or copper line) directly
to the inlet fuel filter or fuel pump may cause the fuel line
to crack during operation creating a serious fire hazard.
ELECTRICAL CONNECTIONS
NOTICE: CLASS 1 WIRING METHODS ARE TO BE USED FOR
ALL FIELD WIRING CONNECTIONS TO TERMINALS OF A
CLASS 2 CIRCUIT
NOTE: The symbol always indicates ground where
shown. All wiring must be completed in accordance with
the National Electric Code as well as any state and local
codes.
You must pay particular attention to wire size requirement
for the amperage of service you are dealing with. The table
below provides you guidance on wire sizing based on
both wire type and amperage. Wire amperages have been
derated for 40° C ambient temperatures operation.
GENERATOR CIRCUIT BREAKER
This unit DOES NOT come with a circuit breaker. The circuit
breaker will provide overload protection for the generator.
The following table gives you the recommended circuit
breaker size specifications. See actual breaker for wire
capabilities and torque specifications and restrictions.
Watts Voltage Phase CB AMP
40,000 120/240 1175-200
40,000 120/208 3150-175
40,000 120/240 3 125-50
40,000 277/480 360-75
Fuel Inlet
Connection
Fuel Return
Line Connection

9OPM-141/E
The wire must be properly sized between the generator
and the load. Use the table 310-16 of the National Electrical
Code ANSI/NFPA 70. to properly size the wire to meet or
exceed the amperage rating of the circuit breaker installed.
Lug size 10mm
CUSTOMER CONNECTIONS
ULine 1
VLine 2
WLine 3
NNeutral
Ground
The DSE 7310 controller uses current transformers (CT) to
monitor the amount of load on each leg of the generator. If
the wires are routed through the CT the wrong direction it
will result in a negative current readings on the controllers.
This can be corrected by swapping the wires on the CT
terminals in the generator end. Zip tie the wires to the CT
walls after installation in order to prevent wire movement.
WARNING: PERSONAL DANGER:
These units are shipped with a NEUTRAL TO GROUND
BOND INSTALLED. If your system already has a neutral
to ground bond, then you must run a separate ground
lead to that location and UNBOND THE JUMPER IN THE
CONNECTION PANEL. For additional information, refer to
the current National Electrical Code on grounding.
WARNING: EQUIPMENT DAMAGE:
When installing a three phase 240 Volt system, be sure
you know which lead is high voltage ‘wild’ leg (208 Volt to
neutral). The generator normally carries the high voltage
on the G2 lead.
N
W
V
U
GROUNDING
Proper grounding of your generator is application
dependent. Carefully evaluate your planned use of your
generator to understand which grounding you require.
If you are not sure what to do, contact a competent
professional to assist you. The NFPA 70 250:34-35 are good
technical references.
VEHICLE-MOUNTED GENERATOR
Your WINCO generator ships with a bonded neutral.
When mounted to a vehicle to safely distribute power it is
necessary that the generator frame is bonded to the vehicle
frame. The generator should only supply equipment that
is cord and plug connected through customer installed
receptacles mounted on the generator or the vehicle.
PERMANENTLY INSTALLED GENERATORS
This WINCO portable generator ships with a bonded
neutral. NFPA 70 refers to this as a “separately derived
system.” When connecting it to a building a transfer
switch specifically designed for GFCI and bonded neutral
generators is required or the ground or the neutral to
ground bond must be broken and the panel relabeled.
TRANSFER SWITCH
NOTICE:
For full service switching of the entire load, the ATS must
be ‘SE’ (Service Entrance) rated or must have a properly
rated fusible disconnect installed before the ATS to protect
the contacts.
WARNING: FIRE HAZARD:
All wiring must be done by a licensed electrician, and must
conform to the National Electrical Code and comply with
all the local codes and regulations. Check with the local
authorities before proceeding.
INSTALLATION NOTES:
Because of many different types of service, feeder and
distribution equipment, no specific 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 ATS Control and safety system will eliminate all
paths and feedback.
To wire the automatic transfer switch into existing wiring,
first determine which circuits will be on the emergency
load circuit. If the entire load is transferred, the transfer
switch can be wired directly after the meter and the service
entrance, providing the service entrance ampere rating is
within the transfer switch’s rated capability.
If only specific circuits are to be powered under emergency
power failure conditions, an additional distribution panel
designated “emergency distribution panel” must be
installed.

10
OPM-141/E
All selected emergency circuits are removed from main
distribution panels and installed in the emergency
distribution panel. The ATS 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.
DC WIRING
All communication and DC wiring should be run in
separate conduit from AC wiring.
REMOTE START
The DSE7310 is able to start the generator when it receives
a remote signal from any dry contact. This makes the system
compatible with a wide range of control mechanisms
including two-wire start automatic transfer switches. When
the contact closes the controller will automatically start.
When the contact is opened the generator will go through
a cool-down cycle and turn off. Connect the remote start
leads to the Remote Start + and Remote Start - terminal
blocks in the door behind the DSE 7310 controller.
E STOPS
In some applications additional emergency stops may be
desired or necessary. The controller has terminals designed
allowing the addition of multiple remote emergency stops.
E-stops must be normally closed to work properly in this
system. The e-stop circuit supplies power to fuel solenoid
and the starter circuit. Opening any switch in the series
prevents the engine from cranking or from receiving fuel to
run.
To wire additional emergency stop switches first remove
the orange jumper between the two Emergency Stop
terminal blocks. Failure to remove the jumper will prevent
the remote switches from working properly. Add wires
between the terminal block to the new switch(s). The
switches must be wired in series for proper function. Test
each e-stop after wiring to ensure they function properly.
SCR (DSENET) 4A (DSENET) 4B (DSENET) Battery Charge Fail Emergency Stop Emergency Stop Remote Start + Remote Start - Ground Ground Battery + Battery -
Two-Wire Start Hook-Ups
SCR (DSENET) 4A (DSENET) 4B (DSENET) Battery Charge Fail Emergency Stop Emergency Stop Remote Start + Remote Start - Ground Ground Battery + Battery -
E-Stops
SERIAL COMMUNICATION
DSE provides a series of remote accessories that can help
provide useful information to operators. These accessories
communicate over the DSE Net. Terminal blocks are wired
to the distribution panel to aid in installation. Follow the
instructions included with each accessory.
The generator controller can communicate with a variety
of controls and monitoring systems, including RS232 and
RS485. The ports are wired onto the back of the DSE7310.
In order to finalize communication the program will need
to be adjusted using the free DSE configuration software to
enable the commutation. Contact Winco service for a list of
register values.
INSTALLING THE BATTERY
CAUTION
In the following battery installation procedure, check to be
sure the engine control is in the “stop” position. This should
be your last step before initial start-up.
A customer supplied 12 Volt battery is required to complete
the installation. Installation of the highest CCA rated battery,
within the correct BCI group, will increase cold weather
starting performance.
BATTERY REQUIREMENTS
Model Voltage BCI Group Min. CCA
Rating
DE4040F4 12 24 650
WARNING: EQUIPMENT DAMAGE
This unit is12 Volt and is negative ground. Permanent
damage will occur if they are connected to a 24 Volt
system or a positive ground system. If you are using the
truck batteries to start these units, you may have to disable
the charging system to keep it from interfering with the
vehicle charging system.
Installation and servicing of batteries must only be
preformed or supervised by personnel knowledgeable of
batteries and the required precautions. Keep unauthorized
personnel 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 a battery in a fire. 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 engine-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.

11 OPM-141/E
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 first and
then connect the battery negative cable. When
removing the battery cables from the battery, reverse
the procedure, disconnect the negative first and then
the positive cable.
5. Be sure all connections are tight and coat the
terminals and cable ends with dialectic grease.
WARNING
The electrolyte is 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, flush thoroughly and
immediately with water and 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 bicarbonate of soda (baking
soda) to one gallon of water. The bicarbonate of soda
solution is to be added until the evidence of reaction
(foaming) has ceased. The resulting liquid is to be
flushed with water and the area dried.
DANGER: EXPLOSIVE FIRE RISK
1. Never smoke when near batteries.
2. Do not cause a flame or spark in the battery area.
3. Always discharge static electricity from your body
before touching batteries by first 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 refilling the battery with
water, use only distilled water. Tap water will shorten the
service life of the battery.
Never fill the battery above the fill line. Over filling above
the upper level line may cause the electrolyte to overflow,
resulting in corrosion to the engine or nearby parts.
Immediately wash off any spilled electrolyte following the
procedure above.
NOTE: Always make sure that a new battery is fully charged
before installing it on a generator set. Failure to do so
can cause damage to the engine control module in the
generator set.
All connections must be clean and tight. Check the
electrolyte in the battery periodically to be sure it is
above the plates. Never allow the battery to remain in a
discharged condition.
BATTERY CHARGER
& BLOCK HEATER
BATTERY CHARGER
A three-stage, on-board marine battery charger is provided
standard on this unit. The charger is a 1.5 amp dual use
maintainer and charger designed to keep your batteries
fully charged by maintaining them automatically.
Make sure all DC battery connections are tight and clean.
Follow battery manufacturer’s recommendations.
This charger is mounted under the customer connection
on the control side of the generator. The charger will
need to be plugged to a customer’s power source, using
a customer supplied heavy duty, UL approved extension
cord. The receptacle is to be powered by a GFCI circuit and
installed in accordance to the US National Electric Code. It is
suggested that this circuit be fused to 20 Amps.
Low/Charge Mode:
The illuminated blue power LED and red low/charging LED.
This indicates the Low/Charge mode is in process. When
completed the RED Low/Charge LED will turn off.
Auto Maintain Mode:
The illuminated Green auto maintain LED. This indicates
your 12volt battery is fully charged. During short or long
term storage periods, Auto Maintain (Energy Saver) mode
will monitor and auto maintain a battery only when needed
to maintain a full state of charge. This feature significantly
reduces AC Power consumption, lowers operating costs
and maximizes reserve power performance.
BLOCK HEATER
The block heater on this unit is a 1500 watt (12.5 amp)
heater and can be powered by a 120V, 15 amp, GFCI
protected outlet. The block heater is thermostatically
controlled when plugged in will maintain the engine
coolant temperature between 100 and 120 degrees F. The
generator is also equipped with a trickle battery charger.
This can be powered from the same 15 amp GFCI protected
outlet or it can be powered from a separate circuit.

12
OPM-141/E
STARTING PROCEDURE
CAUTION
In colder climates, the engine must be fully warmed up
prior to starting the compressor.
CAUTION
For the first 10 seconds of operation all of the oil, coolant,
and electrical shutdowns are disabled. This is enough time
to cause catastrophic damage to the equipment if the
pre-start checklist is not properly completed and proper
maintenance isn’t consistently followed.
LUBRICATION
Before starting the engine, check the oil level in the
crankcase. If it is low, refill 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 use the proper oil and keep
the crankcase properly filled will cause excessive engine
wear and shorten its useful life.
WINCO recommends our 5W-40 fully synthetic heavy duty
engine oil to give you maximum cold weather protection
while maintaining excellent performance in warmer
weather. We have partnered with a national lubrication oil
manufacturer to give you access to Winco private branded
premium oil available at comparable prices to conventional
oils. See your dealer for additional information.
A. Installation of engine coolant heating system with heater
on the crankcase is recommended
NOTE: Cold start capabilities are strongly correlated with
the quality of the diesel.
Oil Quality
SAE
Grade
Base
Stock
International
specifications
Sulfur
Content In
The Fuel
WINCO
Broad
Range
5W-40 Synthetic API CJ-4
ACEA E6/E9 <15 ppm
Premium 10W-40 Semi-
Synthetic
API CJ-4
ACEA E6/E9 <15 ppm
Cold
Climate 5W-30 Synthetic API CJ-4 ACEA E6/E9 <15 ppm
Not
Authorized Monograde
CAUTION: PERSONAL INJURY
Only check oil when the engine is not running and is at a
low temperature in order to avoid the risk of burns.
1. Remove the dipstick (1) and ensure the oil level is
between the Min and Max limits.
2. If it is difficult to assess the level of the oil, clean the
dipstick (1) using a clean cloth and then put it back into
its seat (2). Remove the dipstick (1) again and check the
level.
3. If level is low, unscrew the plug (3) and refill with
suitable oil using the previous table.
COOLANT
Before starting the engine, check the coolant level in
the radiator. If it is low, refer to Refilling Coolant in the
Maintenance section of this manual. The radiator should be
filled to about 1 inch below the filler neck. For additional
information on engine coolant requirements, see engine
manufacturer’s maintenance instructions.
PRE-START CHECK LIST
There is a Pre-Start & Warranty Form that must be filled out
by an Authorised WINCO Service Center. After completing
the checklist, the engine-generator set is ready for initial
start-up.
WARNING: EQUIPMENT DAMAGE
Before attempting to start this unit, complete your pre-start
checklist and ensure the generator mainline circuit breaker
(if installed) 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.
3

13 OPM-141/E
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, de-activates
the Audible Alarm output (if configured) 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 configuration
screens.
A small rocker switch is located on the
underside of the engine control cabinet.
On gaseous models, the engine timing is
controlled by the ECU on the engine and you
need to tell it what fuel you want to operate
on; LP or NG.
On diesel models, this switch has been
disconnected and will do nothing.
PROTECTIONS
When an alarm is present, the common alarm LED, if
configured, will illuminate. The LCD display will show an
icon to indicate the failure.
WARNINGS
Warnings are non-critical alarm conditions. They 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 flashing in
the display.
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 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 DSE 7310 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 match the nameplate 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

14
OPM-141/E
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.
WARNING: EQUIPMENT DAMAGE
Always make sure the generator runs under no load for
five minutes before stopping to allow the engine and
components to cool down. Don’t use the E-Stop as the
standard.
AUTO MODE
To activate the automatic start mode you will just need to
depress the AUTO button, the LED indicator beside the
button confirms 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 to 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.
CONTROL POWER
The DSE7310 controller consumes small amounts of battery
power when it is in use. The controller comes with a power
switch that disconnects battery power when it is not in use.
The switch is designed with a safety relay that prevents it
from removing power to the controller while the generator
is operating. If the switch is turned off while the engine is
running it will continue operating until the engine shuts
down and then the controller will power down.
This switch should be used when the generator is not
going to be used over the course of several days and the
generator is not connected to a battery charger.
A solar charger kit is the easiest way to always maintain the
battery during storage in mobile applications. The supplied
battery charger can be plugged in to an extension cord on
mobile applications.

15 OPM-141/E
OPERATING CONDITIONS
NORMAL OPERATION
This generator set is designed to be operated under load
and the accumulation of operating hours without load can
cause unburned fuel from the combustion chamber to build
up in the exhaust system. This is called wet stacking and can
result in fouled injectors and carbon buildup in the exhaust
pipes, turbo and exhaust valves.
To avoid wet stacking the operating temperatures must be
kept high enough. The best way to do this is to ensure that
the generator set has adequate load during operation. If
the engine is cold at start up run it for 2-5 minutes and then
load the generator. Idling longer than this is more likely to
damage the engine than extend its life
If the generator application is for emergency standby the
generator should be exercised at least monthly ideally
under load. Load banking the generator at least annually
will help keep the engine in good condition.
HARSH ENVIRONMENTS
OPERATIONS
Some applications require the generator to operate in
harsh environments. One of the most common hazards are
extremely dusty conditions. In harsh conditions it is often
necessary to take additional steps to keep the equipment
clean and operating at its peak. Maintenance intervals on
lubricant and filter changes may need to be shortened. An
oil quality testing program can also provide early warnings
or oil degradation. Efforts may need to be made to reduce
the amount of dust and debris entering the housing and
generator components.
COLD WEATHER OPERATIONS
The minimum natural starting temperature with glow plugs
is -5°F. The minimum starting temperature with glow plugs
and block heater is -13°F.
The degree of fluidity of the diesel oil can may be reduced
at low temperatures due to the separation of the paraffin.
This results in the filters becoming clogged.
The ASTM D975 or EN590 specifications distinguish
different classes of diesel fuel, identifying the characteristics
of those that are best adapted to low temperatures.
Oil companies must respect these standards, which provide
for the distribution of fuels adapted to the climatic and
geographical conditions in various countries.
This generator-engine set needs load and should not idle
for long periods of time.
If the generator set will be run in extremely cold
environments it may be beneficial to provide means to
reduce air circulation to increase the temperature of the
enclosure.
Inspect the CV filters and hoses regularly during cold
operation looking for signs of freezing. If the line freezes it
will cause pressure to build in the crankcase and may cause
an engine seal failure. An optional CV hose heater kit is
available to install and is recommended for units operating
in temperatures below 14°F. If the engine operates below
optimal temperatures for long periods of time damage may
occur.
It is possible for water to collect and freeze in the lines and
manifolds of the air system preventing the compressor
from operating. Starting the generator with the compressor
unloaded until the enclosure is warmed will prevent this
issue.

16
OPM-141/E
do this may result premature wear and failure of the drive
belts, damage to the equipment, or poor performance.
There are several things to keep in mind when adjusting
the compressor.
There are four bolts that bolt into the base of the
compressor that can be loosened to adjust the compressor
front to rear and help with minor tweaks to the angle.
Adjust these bolts first in order to do any major front to rear
adjustment. Torque those bolts to 32 FT-LBS. There are four
corner bolts that secure the sliding base into place; these
must be loosened before the tension can be set on the
belt. Once the four bolts are loosened, the two bolts on the
right side of the compressor base can be turned clockwise
in order to tighten the belt or counter clockwise in order to
allow the belt to be loosened. Tighten the belt until there
is 2-3lbs of tension in the belt that can be checked with
a gauge or about .3 inches of deflection at the midpoint
of the belt. It is recommended to use a proper pulley
alignment too when making any adjustments to the pulley
in order to keep the alignment accurate so as to prevent
excess wear on the belts. Once the belt tension has been
set, tighten the four corner screws to lock the tension and
alignment into place. Verify after tightening all four corner
bolts that the pulley alignment has not shifted.
AIR COMPRESSOR MAINTENANCE
All maintenance, assembly, and repair work should be
carried out by an authorized, qualified, specially trained
personnel. These precautions must be followed:
1. Only use suitable tools for maintenance and repair
parts.
2. Only use genuine parts.
3. All maintenance and repair work must only be carried
out with the complete unit shut down and the power
supply switched off. Ensure the machine is secured
against accidental switch-on.
WARNING: PERSONAL INJURY
Before removing plugs, filters, and other pressurized parts,
the compressor must be cut off from all pressure sources
and a pressure relief of the entire system must be carried
out.
4. Never use flammable solvents or carbon tetrachloride
to clean parts.
5. Always ensure the area is clean and free from dirt
when conducting maintenance or repair work. Cover
parts and exposed openings with a clean cloth, paper,
or adhesive tape.
AIR COMPRESSOR
This unit has been equipped with an air compressor that
uses an auxiliary shaft from the generator to provide 120
PSI @ 40 CFM
AIR COMPRESSOR SPECIFICATIONS
Model Rotorcomp NK 31
Max. Operating Pressure 218 PSI (15 bar)
Oil Capacity 101.4 oz. (3.17 qts)
CONNECTING TO COMPRESSOR
Locate the 3/4” NPT on the air cooler (reference following
image) and attach your air hose.
START UP
Follow the starting procedure found previously in this
manual.
Once the engine is running at speed, engage the air
compressor toggle switch, located next to the control panel,
to the ‘on’ position.
CAUTION
In colder climates, the engine must be fully warmed up
prior to starting the compressor.
WARNING: EQUIPMENT DAMAGE
Always start and stop engine with the air compressor OFF.
ADJUSTING AIR PRESSURE
A pressure valve controls the air pressure to maintain120
PSI, it will turn off at 150 PSI. Manual adjustments are not
necessary.
ADJUSTING THE BELT
Note: When adjusting or replacing the belt on the unit,
care must be taken to ensure that the pulleys are properly
aligned and that the belt is properly tensioned. Failure to
3/4” NPT
Air compressor
toggle switch

17 OPM-141/E
6. Do not conduct any welding or other heat producing
work around the oil system.
7. Ensure no tools, loose parts, or cloths are left on or on
the system.
8. Prior to using the unit, check whether the operating
pressure, temperatures, time settings, and the oil levels
are correct. Also check that the control and switch-off
devices function properly.
CHECKING THE OIL LEVEL
Oil level can only be checked at the oil filler opening.
NOTE: The screw cap has a safety hole on the side, oil or air
escapes if there is any residual pressure in the tank.
1. Switch off the compressor and disconnect the battery
to prevent the engine from starting.
2. Wait one minute at standstill.
3. Screw off plug of the filler neck by hand with the oil
level depressurized.
4. Check the oil level. Reference the previous diagram.
5. If necessary, top off oil to the maximum level.
6. Screw on the plug firmly by hand.
7. Switch on the system.
8. Check the plug for any leaks, replace the o-ring if
necessary.
9. Carefully remove escaped, excess oil.
CHANGING THE OIL
Refer to the maintenance schedule chart for required oil
change intervals.
WINCO recommends our Rotorcomp maintenance kit,
which includes 1 gallon of IAT-RS8000 oil and filters.
WARNING: PERSONAL INJURY
Rotating, pressurized, and hot components. The oil
change can only be changed at a standstill and with the
compressor system completely discharged.
NOTE: Dispose of the used oil according to applicable
regulations.
1. Switch off the compressor and disconnect the battery
to prevent the engine from starting.
7.2 [en] 02/2014
Installation and operating manual - NK 31ROTORCOMP VERDICHTER
7.2 Oil level
An important factor for the operating safety of the
system is the oil level in the oil reservoir.
The oil level check must be carried out before
commissioning the screw compressor module
and then repeated every 100 operating hours..
The exact oil level check can only be carried out
via the oil filler opening.
Warning
Rotating, pressurized and hot components,
DANGER OF INJURY!
7.2.1 Oil level check via oil filler opening
Warning
– The unit parts, oil and oil filler plug 1may be
over 80°C/176°F; danger of burns!
Wear personal safety equipment!
– With hot oil, the oil level can be approx. 10 mm
higher than with cold oil shortly after discharg-
ing.
As a result, oil may escape when the oil filler
plug is opened at the maximum oil level. In
this case, close the oil filler plug again imme-
diately and carefully remove the oil which has
escaped.
Figure 7-1
Note
The screw cap of the oil filler neck is provided
with a safety hole on the side from which oil or air
escapes if there is any residual pressure in the
separating tank. Wait briefly in this case.
• Switch off the system and secure it against
unauthorized switch-on.
• Wait for one minute at standstill.
• Screw off the screw plug 1of the filler neck by
hand with the oil level depressurized.
• Check the oil level.
• If necessary, top up oil of the same oil type and
the same brand up to the maximum level.
MAX
MIN
1
7.3
[en] 02/2014
Installation and operating manual - NK 31
Note
The oil filler neck is positioned so that overfilling
of the screw compressor system is not possible.
Excess oil runs out of the filler neck again.
• Screw on the screw plug 1firmly by hand.
• Switch on the system.
• Check the oil filler plug for leaks and replace
the O-ring if necessary.
• Carefully remove escaped, excess oil.
7.3 Oil change
Warning
Rotating, pressurized and hot components,
DANGER OF INJURY
The oil change may only be carried out at a
standstill and with the screw compressor system
completely discharged.
7.3.1 Oil change intervals
According to the specifications of the system
manufacturer.
For the reference values for the screw compres-
sor compact module, see chapter 7.8 “Mainte-
nance intervals”.
7.3.2 Oil drain points
The system should be at operating temperature
in this case.
Figure 7-2
Note
Dispose of the used oil according to the appli-
cable regulations.
• Switch off the screw compressor and then
secure it against being switched on again by
removing the main switch.
• Completely release the pressure in the screw
compressor system.
• Slowly screw off the screw plug on the oil filler
neck.
• Carefully unscrew the oil drain screw 1and
catch the used oil in a suitable container.
• Clean the oil drain screw 1and screw in again.
1
2. Completely release the pressure
in the system.
3. Slowly screw off the screw plug
on the oil filler neck.
4. Unscrew the oil drain screw
(ref. 1) and drain the used
oil into an approved container.
5. Clean the oil drain screw and screw back in.
6. Replace the oil filter if necessary. See Changing Oil
Filter of the Air Compressor section of this manual.
7. Refill with new oil at the filler neck to the maximum
level.
NOTE: The compressor must be operated with an oil
suitable for special requirements. This oil must be approved
by the manufacturer for screw compressors. It must even
be suitable under unfavorable operating conditions, such
as soiling of the intake air with gases, solvent vapors and
exhaust gases and at high ambient temperatures. Suitable
oil types and oil manufacturers can be specified for screw
compressor on request.
Refined oils (mineral oils) synthetic oils and bio oils
(biodegradable) can be used as screw compressor oil. The
materials and gaskets used in the screw compressor system
must be taken into account when selecting the oil type.
Corrosion and other material damage may not occur. It is
not permissible to mix different oils.
This compressor requires 101.4 ounces (3.17 quarts) of oil if
it is completely drained. Use caution when refilling.
8. Turn on the compressor and allow to run for 3 minutes.
9. Check oil level. Top off to the maximum level if needed.
CHANGING THE OIL FILTER
WARNING: PERSONAL INJURY
Rotating, pressurized, and hot components. The oil
change can only be changed at a standstill and with the
compressor system completely discharged.
1. Switch off the
compressor and
disconnect the battery
to prevent the engine
from starting.
2. Remove the oil filter
cartridge (Ref. 1) with
a suitable tool, i.e. oil
filter strap wrench.
3. Oil the gasket (Ref. 2.) on the new filter cartridge with
the same oil type in use with the compressor.
4.Screw the new oil filter cartridge on (Ref. 3) and tighten
by hand.
5. Switch on the compressor.
7.4 [en] 02/2014
Installation and operating manual - NK 31ROTORCOMP VERDICHTER
7.3.3 Filling with oil
Attention
Observe the oil recommendation, see “Lubricants
and Operating Materials”. Add oil of the same oil
type from the same manufacturer.
Switching over to another oil type can require the
compressor module to be flushed.
ROTORCOMP recommends also replacing the
oil filter during an oil change.
• Replace the oil filter if necessary
• Pour oil into the filler neck on the separator
tank up to the maximum level and screw the
screw plug 1onto the filler neck by hand
(see Figure 7-2).
• Switch on the screw compressor and allow it to
run for approx. three minutes.
• Oil level check:
Top up the missing oil quantity again up to the
maximum level.
• Check sheet entry (see chapter 7.7 “Mainte-
nance check sheet”).
7.4 Oil filter
Warning
Rotating, pressurized and hot components,
DANGER OF INJURY
– The unit parts, oil and oil filler plug may be
over 80°C/176°F; danger of burns!
– Wear personal safety equipment!
The oil filter replacement may only be carried
out at a standstill and with the screw compressor
system completely discharged.
7.4.1 Oil filter replacement intervals
According to the specifications of the system
manufacturer.
For the reference values for the screw compres-
sor compact module, see chapter 7.8 “Mainte-
nance intervals”.
7.4.2 Oil filter replacement
Figure 7-3
• Switch off the system and completely release
the pressure in the system.
• Remove the oil filter cartridge 1with a suitable
tool, e.g. oil filter strap wrench.
• Oil the gasket 2on the new oil filter cartridge 1
with oil of the same oil type as in the compres-
sor module.
Note
Dispose of the old oil filter cartridge according to
the applicable regulations.
• Screw the new oil filter cartridge onto the con-
nection nipple 3and tighten by hand. No tool is
required.
• Switch on the screw compressor.
• The oil filter must then be checked for leaks
with the system running.
• Oil level check:
Top up the missing oil quantity again up to the
maximum level.
• Check sheet entry (see chapter 7.7 “Mainte-
nance check sheet”).
1
2
3

18
OPM-141/E
6. Check the filter for leaks while the system is running.
7. Turn off compressor and check oil level. Top off to the
maximum level if needed.
REPLACING FINE SEPARATOR
CARTRIDGE
WARNING: PERSONAL INJURY
Rotating, pressurized, and hot components. The fine
separator cartridge can only be changed at a standstill
and with the compressor system completely discharged.
NOTE: Heavily soiled intake air or a poor oil quality will
result in early replacement of the fine separator cartridge.
1. Switch off the compressor and disconnect the battery
to prevent the engine from starting.
2. Unscrew the fine separator cartridge (Ref. 1) with a
suitable tool, i.e. an oil filter strap wrench.
3. Oil the gasket on the new fine separator cartridge with
the same oil type as in the compressor module.
4. Tighten the new fine separator cartridge by hand.
5. Switch on the system.
6. Check for any leaks.
REPLACING THE AIR INTAKE FILTER
NOTE: The air filter must not be cleaned and then reused,
always replace the air filter.
WARNING: EQUIPMENT DAMAGE
No dirt or dust particles may get into the air inlet of the air
compressor.
7.5
[en] 02/2014
Installation and operating manual - NK 31
7.5 Fine separator cartridge
Warning
Rotating, pressurized and hot components,
DANGER OF INJURY
– The unit parts and oil may be over 80°C/176°F;
danger of burns!
– Wear personal safety equipment!
The fine separator cartridge may only be re-
placed at a standstill and with the screw com-
pressor system completely discharged.
7.5.1 Maintenance intervals
According to the specifications of the system
manufacturer.
For the reference values for the screw compres-
sor compact module, see chapter 7.8 “Mainte-
nance intervals”.
With heavily soiled intake air or a poor oil quality,
the cartridge is heavily soiled, making premature
replacement necessary.
7.5.2 Replacing fine separator cartridge
Figure 7-4
Note
Dispose of the old fine separator cartridge ac-
cording to the applicable regulations.
• Unscrew the fine separator cartridge 1with a
suitable tool, e.g. oil filter strap wrench.
• Oil the gasket on the new fine separator car-
tridge 1with oil of the same oil type as in the
compressor module.
• Tighten the new fine separator cartridge by
hand. No tool is required.
• Switch on the screw compressor system.
• The fine separator must be checked for leaks
with the system running.
• Check sheet entry (see chapter 7.7 „Mainte-
nance check sheet“).
1
7.6 [en] 02/2014
Installation and operating manual - NK 31ROTORCOMP VERDICHTER
7.6 Intake air filter
7.6.1 Maintenance intervals
According to the specifications of the system
manufacturer.
For the reference values for the screw compres-
sor compact module, see chapter 7.8 „Mainte-
nance intervals“.
In case of heavily soiled intake air, an earlier
replacement of the filter element is necessary
when the optical or electric maintenance indica-
tor (optional) indicates this (perm. vacuum up to
50 mbar).
7.6.2 Replacing air filter element
Figure 7-5
Attention
No dirt or dust particles may get into the air inlet
of the screw compressor.
Note
It is not permissible to clean the filter element;
the filter element must always be replaced in
case of soiling!
Dispose of the old air filter element according to
the applicable regulations.
3
1
2
• Switch off the system and secure it against
unauthorized switch-on.
• Screw off the nut 1and remove the filter
cover 2.
• Carefully remove dust from the filter housing.
• Remove the old filter element 3.
• Insert the new filter element in the filter hous-
ing.
• Lay on the filter cover, ensuring proper posi-
tioning during assembly.
• Tighten the wing nut.
• Switch on the screw compressor system.
• Conduct a test run and an operating test.
1. Switch off the compressor and disconnect the battery
to prevent the engine from starting.
2. Screw off the nut (Ref 1) and remove the filter cover
(Ref. 2).
3. Carefully remove dust from the filter housing.
4. Remove the old filter (Ref. 3).
5. Insert the new filter in the filter housing.
6. Securely screw the filter cover back on using the wing
nut.
7. Switch on the compressor.
8. Conduct a test run and operating test.

19 OPM-141/E
CHANGING OIL FILTER
The filter must be replaced when the lubricant oil is
changed.
Only use filters with a filtering degree equal to the original
filter.
CAUTION: PERSONAL INJURY
Only change oil when the engine is not running and is at
a low temperature in order to avoid the risk of burns.
1. Use an oil filter wrench to unscrew and remove the oil
filter (1) from the filter mount (3) and recover the
gasket (2)
2. Replace the oil filter (1) and gasket (2).
3. Carefully clean the surfaces of the support that are in
contact of the gasket (2).
4. Moisten the gasket (2) with a thin layer of oil and place
it in its seat on the oil filter (1).
5. Manually tighten the new oil filter on the mount (3)
until it is fit up against the gasket (2).
6. Using the oil filter wrench, further tighten the oil filter.
REFILLING COOLANT
CAUTION: PERSONAL INJURY
Only proceed when the engine is not running and is at a
low temperature in order to avoid the risk of burns.
1. Remove the cap (1) on the radiator.
2. With the engine cold, make sure the level of coolant in
ENGINE MAINTENANCE
CHANGING THE OIL
CAUTION: PERSONAL INJURY
Only change oil when the engine is not running and is at
a low temperature in order to avoid the risk of burns.
1. Place a drip pan or suitable container for catching the
oil below the drain valve attached to the sump (5).
WINCO has supplied a valve to hook a customer
supplied 5/8” hose to conveniently run the oil to the
drip pan.
2. Remove the dip stick (2) and remove the engine
lubricant oil filter plug (1).
3. Drain the oil by removing the plug (4) from the oil
sump (5).
4. Once the sump (5) has fully drained, close the valve.
5. Top-up through the filler pipe (6) using lubricant oil
with the suitable oil table in the LUBRICATION section
of this manual..
6. Use the dip stick (2) to ensure the level of oil does not
exceed the “MAX” limit.
7. Insert the dipstick and close the lubricant filler cap (1).
8. Dispose of oil in accordance to local codes. DO NOT
dispose or allow oil to seep into the ground or sewer
systems, doing so will cause environmental damage.

20
OPM-141/E
CLEANING RADIATOR
The surfaces of the radiator come into contact with the
outside air and can be subject to deposits and impurities.
Clean in accordance to the maintenance schedule with
compressed air or steam.
REPLACING BLOW-BY FILTER
Do NOT perform while the engine is running.
Using Illustration 1:
1. Remove the belt guard.
2. Unscrew the lower guard screws (2) and remove the
lower guard (1).
3. Save the anti-vibration plugs (3).
4. Unscrew the screws (4) and remove the fan guard (5).
Illustration 1
the radiator is above the minimum level.
3. Refill if necessary.
CHANGING AIR FILTER
Do NOT remove filter while engine is running.
1. Remove the air filter cover (4) after having released the
two quick closing hooks (3).
2. Remove the filter (5). During this operation, take care
to ensure that no dust enters the sleeve.
3. Position the filter (5) in its seat.
4. Replace the cover (4) of the air filter and lock it in place
using the two quick release hooks (3).
CHECKING WATER IN PRE-FILTER
WARNING: EQUIPMENT DAMAGE
Clean the exhaust valve prior to checking the pre-filter to
reduce the risk for system contamination.
Do NOT perform while the engine is running.
1. Place a container for collecting liquids under the
pre-filter (2).
2. Unscrew the plug (1) located at the bottom of the filter.
3. Drain the fluid until only fuel comes out.
4. Fully hand-tighten the plug.
5. Dispose of liquid in accordance to local codes. DO NOT
dispose or allow liquid to seep into the ground or
sewer systems, doing so will cause environmental
damage.