Shindaiwa DG25MK User manual

OWNER
’
S AND OPERATOR
’
S MANUAL
Vertical, Water-Cooled 4-Cycle Diesel Engine
DG25MK-400
X750-026 52 1
X750801-610 1
CAUTION
Do not operate the Generator, or any other appliance, before you have read and
understood the instructions for use and keep near for ready use.

Introduction
Thank youfor purchasing thisShindaiwasoundproof diesel engine generator.
This manual has been created to ensure safe usage of this generator. Be sure to read this
manual before operation. Improper operation/handling of this generator will result in an accident
or malfunction.
Handling/Operation of this generator can only be performed by persons who understand the
contents of this manual and can handle/operate the generator in a safe manner. Persons who
suffer from an illness, are taking medicine or not feeling way such that safe operation would be
negatively affected must not operatethis generator.
Work performed using this generator and handling/operation of this generator must be in
accordance with corresponding laws and regulations based on such laws. Consult with the
authorized distributor where this generator was purchased if you have anyinquiries regarding the
correspondinglaws.
Always be sure to include this manual when loaning out this generator and instruct operating
personnel to readthismanual beforeoperation.
Store this manual in a specified location where it will be secure and available for consulting at any
time. Order another copy from the authorized distributor where this generator was purchased if
thismanual becomes dusty, grimy or torn.
Consult with the authorized distributor where this generator was purchased if you have any
inquiries regarding any points relatedtothis generator and manual.
Wheninquiringabout this generator, be sure to provide the model nameand serialnumber.
If disposing of this generator, do so in a manner that is in compliance with laws related to
industrial waste. Contact the authorized distributor where the generator was purchased if you
have anyinquiries regardingproper disposal.
Caution notice ranksinthismanual are classified as follows.
WARNING : Indicates a potentially hazardous situation which, if not
avoided, can result in death or serious injury
CAUTION : Indicates a potentially hazardous situation which, if not avoided,
canresultinminorormoderateinjuryand propertydamage.
< Note > : Other types of cautions and indications.
Note that CAUTION items can also lead to major accidents under some circumstances if
not correctly followed.
All caution notices are important.Be suretofollow all of them.

1
Table of Contents
1. Safety Instructions .......................................................................... 2
2. Specifications................................................................................... 5
2-1. Specifications............................................................................5
3. Applications.....................................................................................6
4. Part Names.......................................................................................6
4-1. External View/Part Names ........................................................6
4-2. Operation Panel Part Names ....................................................8
5. Equipment........................................................................................ 9
5-1. Warning Indicators ....................................................................9
5-2. Meters and Gauges................................................................. 10
5-3. Fuel Piping Switch (3Way Fuel Valve)..................................... 14
6. Transporting/Installing.................................................................. 15
6-1. Transport Procedures.............................................................. 15
6-2. Installation Procedures............................................................15
7. Load Connections ......................................................................... 16
7-1. Load Cable Selection.............................................................. 16
7-2. Connecting Load Cables......................................................... 17
7-3. Earth Leakage Relay and Grounding...................................... 18
8. Pre-Operation Inspection.............................................................. 19
8-1. Checking Engine Oil................................................................ 20
8-2. Checking Coolant.................................................................... 20
8-3. Checking the Fan Belt............................................................. 22
8-4. Checking the Fuel ................................................................... 22
8-5. Checking for Fuel, Oil and Coolant Leaks...............................22
8-6. Checking the Battery...............................................................23
9. Operating Procedures................................................................... 23
9-1. Initial Startup/Pre-Check.......................................................... 23
9-2. Procedures during Operation..................................................25
9-3. Stopping Operation ................................................................. 25
9-4. Protective Functions................................................................ 26
9-5. Connecting with External Fuel Tank........................................ 27
10. Inspection/Maintenance................................................................ 28
11. Long-Term Storage........................................................................ 34
12. Troubleshooting............................................................................. 35
13. Generator Circuit Diagram............................................................ 38
14. Engine Electrical Circuit Diagram ................................................ 40

2
1. Safety Instructions
WARNING : SUFFOCATION FROM EXHAUST FUME
Do not operate the generator in poorly ventilated areassuch as indoorsor tunnels, as the exhaust
gasof the engine contains substances that are harmful to human health.
Do not direct exhaust fumes at pedestrians or buildings.
WARNING : ELECTRIC SHOCK
Before connecting or disconnecting the load cables to/from the output terminal, always turn the
output circuit breakers to the OFF position, stopthe engine, and remove the enginekey.
Closethe output terminal cover before operating.
Do not touchthe generator if theAlternator or casing becomes wet duringoperation.
Do not touch output terminals or internal electric partswhile the generator is operating.
Groundthe every earth groundingterminal to the earth as set out inthemanual.
If even one of all is unconnected by mistake or accident, it will be much more dangerous for
human body than the NO-RELAY case, because leaking current inevitably goes through the
body.
Even though all the earth terminals of the loads have been grounded to the earth, the bonnet
groundingterminal shouldbe grounded to the earth.
There is always a danger of being electrocuted by short-circuit. Be sure to test generator’s
insulationresistanceperiodically.
Grounding should bemade aftertheengineisstopped.
Whenever the Earth leakage relay is activated, you should always repair theleaking place first of
all.
WARNING : INJURY
Closeall doors and lock them during operation.
Close all doors and place locks during operating this equipment, to avoid injuries by
unintentionallytouchingcoolingfanandfan belt.
Before performing any equipment check or maintenance, stop the engine, and remove the
enginekey.Apersonperformingthemaintenance shouldalways keep the key.
Use the lifting hook to lift the machines, and do not lift up the unit using tie-downs. Use of such
couldresultinthe generatorfalling.
Do not liftanyadditional weight such as fuel tanks or trailers.
No personsshouldbeundera lifted generator.
Before turning the circuit breaker to ON position, ensure that the breaker or the switch of loads
are positionedtoOFF.
Operate the circuitbreaker, well-communicatingwiththe electrician bythe load side.

3
CAUTION : EYE/SKIN INJURY
Wear rubber gloves and other protective wear to protect eyes, skin and clothing from the battery
fluid which contains diluted sulfuric acid. If the battery fluid contacts eyes or skin, wash out
immediately with a sufficient amount of clean water. Be sure to receive medical treatment,
especiallyif the fluidcontacts the eyes.
CAUTION : EXPLOSION
Never use or recharge the battery if the fluid level is belowthe minimum level.
Do not create sparks or bring flame near the battery as it generatesflammablegas.
CAUTION : FIRE
Do not bring flammable items (such as fuel, gas and paint) or items that are highly combustible
near the generator as the muffler, exhaust gas andother parts becomeextremely hot.
Keep thisgenerator 1m or more from walls or other hindrances,andona levelsurface.
Do not connect the generator output to indoor wiring.
This generator uses diesel fuel. Always be sure to stop the engine and not bring flames close
when inspecting fuel or refueling. Wait until the engine has cooled before performing such
procedures.
Do not usethis equipmentwhenleak is found, and repair theleaking location before operating.
Always besureto wipe up anyspilled fuel or oil.
Allow the generator to cool before covering withthe protective cover.
Never allow flameto comeclosetothe generator.
CAUTION : BURNS
Do nottouch the engine and surrounding components immediately afterstopping the equipment,
while temperature canreach extremelyhigh.
Do not open the radiator cap immediately after stopping the engine, to avoid sustaining burns
fromhotvapor.
Hot steam gushes out from the coolant sub-tank if the generator overheats. Do not touch the
coolantsub-tank.
Always be sure to stop the engine and allow the engine to cool when performing inspection or
maintenance of engine oil. Opening the oil level indicatoror oil filler cap during operation will result
inhot oil cause personal injury.
CAUTION : INJURY
Always be sure to use lifting hooks when moving the generator, and lift it slowly at a completely
vertical angle.
Personnel performing lifting work must wear protective gear such as helmets, safety shoes and
gloves.
Remove the wood ties if using anchors to securethe generator.
Position the generator on alevel stable surfacesothat it cannot slide or movein anymanner.
Before starting operation, always be sureto turn off all switches of equipment using the generator
andall breakers to OFF.
Do not movethegenerator during operation.
Do not operate the generator if ithas been modified or any partshave beenremoved.

4
CAUTION : PROPERTY DAMAGE
If using this generator for medical equipment, check before use with the medical equipment
manufacturer, doctor, hospital or similar entity.
Check that the generator output setting, output terminal connection and load power source are
consistent.
Cable burnout can occur due to generated heat if the load current exceeds the allowable current
of the cable.
The voltage drop between cables is large if the cable is excessively long or thin, resulting in
decreased input voltage to equipment using the generator, thereby causing decreased
performance, faulty operation and malfunction.
Warning/Caution Label Locations
If warning or caution labels become damaged and difficult to read, replace with new labels in
the indicated locations. Order labels using part number indicated in the parenthesis.

Injury (Part no. : X505-007550)

Electric shock (Part no. : X505-007560)

Caution: gm spec LLC (Part no. : X505-007840)

Caution: fire (Part no. : X505-007650)

Caution (Part no. : X505-008690)

Injury (Part no. : X505-007630)

Burn (Part no. : X505-007830)

5
2. Specifications
2-1. Specifications
Model Unit DG25MK-400
Alternator
Generating Type - Rotating Filed, Brushless 3-Phase
Synchronous Alternator
Rated Frequency Hz 50 60
Rated Output kVA 20 25
kW 16 20
Rated Voltage V 400 [200] *1 440 [220] *1
Rated Current A 28.9 [57.7] *1 32.8 [65.6] *1
Winding - 3-phase, 4-wire
Power factor % 80
Insulation class - F
Excitation - Self-Excitation(Brushless)
No. of poles - 4
Engine
Types - Vertical Water-cooled 4-cycle Diesel Engine
Model (Manufacturer) - V2403 (KUBOTA)
No. of Cylinders (bore x stroke) mm 4 (87 X 102.4)
Continuous rated output kW 19.1 23.7
PS 26.0 32.2
Rated speed min
-
1
1500 1800
Displacement L 2.434
Combustion system - Direct Fuel Injection
Cooling method - Radiator
Lubricating method - Forced lubrication
Starting method - Electric start
Fuel - Diesel Fuel （ASTM No. 2-D）
Lubricant oil - CD class
Fuel tank capacity L 65
Lubricant volume (Full) L 9.7
Cooling water volume L 9.7
Starting motor capacity V-kW 12 - 1.4
Charging dynamo capacity V-A 12 - 30
Battery - 80D26R
Unit
Length mm 1500
Width mm 700
Height mm 1000
Dry Weight kg 625
Installed Weight kg 705
*1:The values in brackets are optional data, when modified to 200/220V by the dealers only.
As default 3-phase output is set at 400/440V, contact your authorized distributor to adjust the
terminal lug setting if necessary to obtain 200/220V for 3-phase output.

6
Tie-Down
Lifting Hook
Tie-Down
Operation Panel Door
Fuel Inlet
Output Terminal Cover
2-2. Ambient Conditions
Use this generator in ambient conditions as described below. Failure to provide these
conditions can result in problems such as malfunction, insufficient output and reduced
durability.
■ Ambient temperature: -15 to 40 degree Celsius
■ Relative humidity: 80% or less
■ Elevation: 300 m or less
3. Applications
Power source for submerged pumps and similar civil engineering equipment
Power source for lighting and similar equipment
Power source for electrical tools and household appliances
4. Part Names
4-1. External View/Part Names
CAUTION : PROPERTY/SECONDARY DAMAGE
Do not use for any application other than those listed above.
If using this generator for medical equipment, check before use with the
medical equipment manufacturer, doctor, hospital or similar entity.

7
Coolant Sub-Tank
Engine Check Door
Oil Level Indicator
Oil Filter
External Tank Fuel Return
External Tank Fuel Inlet
Water Separator
Battery
Alternator Check Door
3way Fuel Valve
Air Cleaner
Coolant Drain Plug
Oil Drain Plug
Fuel Filter
Oil Filler
Accessories
Owners
Manual Engine Key (2 pieces)
Door Key (2 pieces) Grounding Rod
Radiator Plate
Radiator
* Shown with side-plate removed.
Fuel Drain Plug

8
4-2. Operation Panel Part Names
①
Circuit Breaker ⑪
Pilot Lamp
②
Voltmeter ⑫
Starter Switch
③
Ammeter ⑬
Voltage Regulator
④
Frequency Meter ⑭
Throttle Switch
⑤
Water Temperature Gauge ⑮
400/440V Output Lamp
⑥
Fuel Gauge ⑯
Frequency Selector Switch (inside)
⑦
Hour Meter ⑰
Earth Leakage Relay
⑧
Over Load Pre-caution Lamp
⑨
Warning Indicators
⑩
Preheat Lamp

9
5. Equipment
5-1. Warning Indicators
This generator is equipped with the following warning indicators: CHARGE (battery
charge), OIL PRESS (engine oil pressure), WATER TEMP (coolant temperature), OVER
SPEED (engine overspeed), AIR FILTER (air cleaner clogging), and WATER
SEPARATOR (water separator amount). An indicator lights up if a malfunction/fault occurs
during operation and the engine automatically stops depending on the fault type. If the
equipment is normal, the CHARGE and OIL PERSS warning indicators light up when the
starter switch is switched from STOP to RUN, and all warning indicators turn off when the
engine is started.
(1)WATER TEMP (Coolant Temperature) Warning Indicator (High Water Temp.)
CAUTION: BURNS
Do not open the radiator cap immediately after stopping the engine.
Do so will result in hot steam gushing out.
Hot steam gushes out from the coolant sub-tank if the generator overheats. Do
not touch the coolant sub-tank.
If the coolant temperature rises above 115 °C during operation, the WATER TEMP and
ENGINE warning indicators light up, and the engine automatically stops. If this occurs, hot
steam will gush out of the coolant sub-tank. Check the coolant sub-tank coolant level after
the generator cools and add coolant to the coolant sub-tank if it is insufficient. (Refer to
section “8-2. Checking Coolant”.) If the coolant is at the specified amount, it is probable
that the fan belt is loose or there is a coolant leak. Wait for the engine to cool and inspect
for these problems.
< Note>
The coolant temperature cannot be detected if the coolant level is excessively low. Always be
sureto check the coolant levelinthe radiator coolant sub-tank beforestarting work.
WARNING : INJURY
Close all doors and place locks during operation, to avoid injuries by
unintentionally contact with moving parts such as the cooling fan and fan belt.
Before performing any equipment check or maintenance, stop the engine, and
remove the engine key. Aperson performing the maintenance should always
keep the key.
CAUTION : BURNS
Do not touch the engine and surrounding components immediately after
stopping the equipment, while temperature can reach extremely high.

10
(2) OIL PRESS (engine oil pressure) Warning Indicator (Low Oil Press.)
CAUTION: BURNS
Always be sure to stop the engine and allow the engine to cool when
performing inspection or maintenance of engine oil. Opening the oil gauge or
oil filler cap during operation will result in hot oil gushing out.
If the engine oil pressure drops below 0.49 x 100 kPa during operation, the OIL PRESS
and ENGINE warning indicators light up, and the engine automatically stops. If this occurs,
check the engine oil level and add engine oil until it reaches the maximum level.
< Note >
This oilpressurewarning indicator cannot detect oil deterioration. Change theengine oil
periodically. (Refertosection“8-1. Checking Engine Oil”.)
(3) OVER SPEED (Engine Overspeed) Warning Indicator
This generator is equipped with a function such that the engine is automatically stopped if
an engine fault occurs causing the engine speed to increase excessively. If the engine
speed rises above 2070 min
-1
during operation, the OVER SPEED and ENGINE warning
indicators light up, and the engine automatically stops. If this occurs, it is probable that
some malfunction has occurred in the engine. Contact the authorized distributor where the
generator was purchased.
(4) CHARGE (Battery Charge) Warning Indicator (Low Battery Voltage)
The BATTERY warning indicator lights up when charging is not possible during
operation.If charging is not possible and the battery voltage drops below 8 V, the ENGINE
warning indicator also lights up and the engine automatically stops. If this occurs, contact
the authorized distributor where the generator was purchased.
< Note >
Thisbattery chargingwarning indicator cannot detect battery deterioration or insufficient battery
fluid. (Refer tosection“8-6. Checking theBattery”.)
(5) AIR FILTER (Air Cleaner Clogging) Warning Indicator
The AIR FILTER warning indicator lights up if the air cleaner element becomes clogged
during operation. If it lights up, immediately stop the engine and clean or replace the air
cleaner element. (Refer to section “10. Inspection/Maintenance (3) Air Filter Element
Cleaning/Replacement”.)
(6) WATER SEPARATOR (Water Separator Amount) Warning Indicator
The WATER SEPARATOR warning indicator lights up if the liquid stored in the water
separator exceeds approximately 110 ml during operation. If it lights up, immediately stop
the engine and drain the liquid stored in the water separator.
(Refer to section “10. Inspection/Maintenance (4) Draining Liquid in Water Separator”.)
5-2. Meters and Gauges
Engine Meters and Gauges
(1) Hour Meter
Displays the operating time. Use this to schedule periodic inspection. Be
careful as the hour meter operates when the starter switch is at RUN
regardless of whether the engine is running or stopped.

11
(2) Water Temperature Gauge
Water Temperature Gauge displays the temperature of engine coolant.
Normal temperature may vary depending on the environment, but it
should be between 75 to 90 °C.
< Note>
If the temperatureexceeds normal value, disconnect the load, idlethe engine at 1000min
-1
,and
waituntil thereading fallsto the normal temperature range.
(3) Fuel Gauge
It shows the volume in the fuel tank.When filled up, it shows 『F』.
When the hand is approaching to『E』, the volume is coming to empty.
Replenish fuel enough promptly.
Generator Meters
and Gauges
(1) Voltmeter
The voltmeter displays the 3-phase output voltage (voltage between R-T)
from the generator.
Check that 400V is displayed at 50Hz and 440V at 60Hz during
operation.
*Check that 200V is displayed at 50Hz and 220V at 60Hz during
operation if using at the 3-phase 200-V setting.
(2) Ammeter
Ammeter displays the output current (Phase) from the generator.
(3) Frequency Meter
Frequency Meter will display the frequency of the generator.
Please check it showing 50Hz or 60Hz during operation.
Lamp
s
(1) Preheat Lamp
When the starter switch is turned to <Preheat> position, the preheat
lamp will be turned ON. The preheat lamp will be turned OFF after
preheating completes showing the engine start possible.
< Note >
Preheating time varies to coolant temperature, usually about 3-10 seconds.
(2) Pilot Lamp
This lights up when the engine is operating to indicate that power is
being generated.
(3) Over Load Pre-caution Lamp , and Output Terminal for
Lighting of Additional Lamp (Aux Lamp Terminal)
This lamp starts to flash if the output current exceeds around 80% of the
rated current. Use this generator in a range that does not exceed the
rated current while the lamp is flashing. The lamp turns off when the
output current drops below 80% of the rated current.
This generator is equipped with an Aux Lamp Terminal. DC 12 V is output to the Aux Lamp
Terminal at the same time as when the Over Load Pre-caution Lamp is flashing.

12
Refer to the circuit drawing below if using the Aux Lamp Terminal for a lamp or similar
device with a different setting.
< Note >


 Connect a lamp that is DC12V/2A/24W or less to the Aux Lamp Terminal.


 Pre-caution lamp flushing may take time, as thermal relay detects overload by bimetallic
strip systems.
(4) 400/440V output Lamp
This lamp lights up if 400/440V are output from the output terminal and
turns off if 200/220V are output. Check the rated voltage of the device
being used.
< Note >


 Check that the voltages of the generator output setting, output terminal connection and
load power source are consistent.
Switches
(1) Starter Switch
1. Stop
When the switch is set to this position, all power will be off.
The switch must be set to this position to remove the key.
2. Run
The switch must be set to this position during operation.
< Note >
Do not leave the switch to this position, while the engine is stopped.
Otherwise the battery is discharged.
3. Preheat
This position is used during cold season, to preheat Glow Plug.
4. Start
This position is to start the engine. When the key is released, the setting will
automatically return to <Run> position.
(2) Circuit Breaker
By turning this circuit breaker on the control panel to ON,Power will be
transferred to the load side.
The breaker trips to OFF, either overload or short-circuit.
(3) 3-Phase Earth Leakage Relay
When current leak occurs, it trips to stop power transmission to
load.
< Note >
Donotuse thisrelayastheON/OFFswitchtotheload.
STOP
RUN
PREHEAT
START

13
Voltage Regulator and Throttle Lever
(1) Voltage Regulator
The dial adjusts generator output voltage.
By turning the dial clockwise, an operator can increases the voltage.
By turning the dial counter-clockwise, an operator can decrease the
voltage.
(2) Throttle Switch
The switch is to change engine speed (revolution). Turn the switch to
[IDLING] when engine start, warm-up or cool-down, and turn to [RUN]
when using the equipment at the rated speed.
(3) Frequency Selector Switch
This switch changes the frequency between 50Hz and 60Hz, and is located
inside the operation panel. Loosen the two screws to open the operation
panel and check that the internal frequency switch is properly set to the
frequency being used.
< Note >
Check that no loads are connected before using the frequency switch.
This switch is set to 50Hz when shipped from the factory. Set to 60Hz in 60Hz regions.
Over
-
Current Protectors
(1) Thermal Relay (Over Load)
This relay sends a trip signal to the circuit breaker when an
over-current flows in the circuit.When the breaker is tripped, it
is set at the middle between ON and OFF. If this occurs, reset
the breaker according to the following procedure.
Stop the engine.
Wait approximately 1 minute before attempting
to reset the main breaker to allow the thermal
relay to automatically reset.
Turn the main breaker to the “OFF” position.
Turn the breaker to the “ON” position.
If changing the frequency or voltage, change the
Thermal Relay (Over Load) adjustment dial according
to the following table.
FREQUENCY
50Hz 60Hz
Output Volt 380V
400V
415V
380V
440V
480V
Adjustment Dial Value
3.0 2.9 2.8 3.8 3.3 3.0
Control Dial
1
2
3
4
Thermal Relay
(Over Load)

14
(2) Thermal Relay (Over Load Pre-caution Lamp)
If changing the frequency or voltage, change the
Thermal Relay (Over Load Pre-caution Lamp)
adjustment dial according to the following table.
FREQUENCY
50Hz 60Hz
Output Volt 380V
400V
415V
380V
440V
480V
Adjustment Dial Value
2.3 2.2 2.1 2.9 2.5 2.3
5-3. Fuel Piping Switch (3Way Fuel Valve)
CAUTION : FIRE
Always make sure that the engine is stopped when working on piping.
Always be sure to wipe up any spilled fuel.
After working on the piping, check that there is no fuel leakage.
Change the 3-way fuel valve to switch to supply fuel from the external tank. In that
case, the internal fuel tank is not used.
(1) If using the internal fuel tank
The 3-way fuel valve is turned to the “A” side when the generator is shipped from the
factory.
< Note >
When disconnecting piping from the external tank, turn the lever to the “A” side, and attach the
connectinghosetotheexternal tank fuel inlet/return.
(2) If using an external fuel tank
Connect hoses from the external fuel tank to the external fuel inlet and the external fuel
return. Change the lever of the 3way fuel valve to the “B” side to supply fuel from the
external tank.
(Refer to “9-5. Connecting an External Fuel Tank” for corresponding procedures.)
3Way Fuel
Valve
External Fuel Ports
Inlet Port Retun Port
Position A
Position B
Thermal Relay
(Over Load Pre-Caution)

15
6. Transporting/Installing
6-1. Transport Procedures
WARNING : INJURY
Do not lift up the unit using tie down. Use of such could result in the generator falling.
No persons should be under a lifted generator.
CAUTION : INJURY
Always be sure to use lifting hooks when lifting up the generator, and raise it
slowly at a completely vertical angle.
Personnel performing lifting work must wear protective gear such as helmets,
safety shoes and gloves.
Do not move the generator during operation.
(1) Lifting Procedures
Always be sure to use lifting hooks when lifting up the generator, and raise it slowly at a
completely vertical angle.
(2) Transport
When transporting this generator, tie rope to the left and right tie downs, and securely fix
the generator.
< Note >
Handle this generator withgreat care when raising, lowering and transporting. Rough handling of
generator can resultindamage or malfunction.
6-2. Installation Procedures
WARNING : SUFFOCATION FROM EXHAUST FUME
Do not operate the generator in poorly ventilated areas such as indoors or
tunnels, as the exhaust gas of the engine contains substances that are
harmful to human health.
Do not direct exhaust fumes at pedestrians or buildings.
CAUTION : FIRE
Do not bring flammable items (such as fuel, gas and paint) or items that are
highly combustible near the generator as the muffler, exhaust gas and other
parts become extremely hot.
Keep this generator 1m or more from walls or other hindrances, and on a
level surface.
Remove the wood ties if using anchors to secure the generator
Do not connect the generator output to indoor wiring.
Lifting
Hook
Tie-Down

16
If installing this generator, set up barriers or fencing completely around the boundary
line of the construction area and take measures to prevent persons not involved in the
construction from entering the area.
Always set the generator on a hard, flat and leveled surface that serves as the
foundation.
Keep the generator 1 m or more from walls or other hindrances so that the operation
panel door and left/right check doors are accessible for internal inspection/maintenance.
< Note >
This equipment must be operated on hard and flat surface. Operating under any other
conditions may resultinmalfunctions.
Do not block the airflow from radiator vent or muffler exhaust. It may result in reduced engine
performance, overheating,or damage to the electrical parts.
Operating in dusty area or salty air (by the ocean), or any other particulate environment may
result in clogged radiator, which may cause overheating, other malfunctions and insulation
deterioration. Use extremecare, frequent checks and maintenance.
7. Load Connections
7-1. Load Cable Selection
CAUTION : PROPERTY DAMAGE
Cable burnout can occur due to generated heat if the load current exceeds
the allowable current of the cable.
The voltage drop between cables is large if the cable is excessively long or
thin, resulting in decreased input voltage to equipment using the generator,
thereby causing decreased performance, faulty operation and malfunction.
Select cable for use that has sufficient thickness and an allowable current possible for use,
giving consideration to the distance from the generator to the equipment using the
generator.
< Note >
Select cable with a thickness that ensures thatthe voltage drop across the cablewill be within 5%
of the ratedvoltage.
Load Cable Selection Tables
(Ex.) If used voltage is 440V and voltage drops by 22 V.
3-phase: Cabtyre cables
(Unit: AWG)
Length
100 ft (30 m)
or less 200 ft (61 m) 300 ft (91 m) 400 ft (122 m) 500 ft (152 m) 600 ft (183 m)
Current
20 A 12 12
12
12
12
12
25 A 12
12
12
12
12 10
30 A
12
12
12
12
10
10
35 A
12
12
12
10
10
8
40 A
12
12
12
10
10
8
(Unit: mm
2
)
Length
50 m
or less 75 m 100 m 125 m 150 m 200 m
Current
20 A 3.5 3.5 3.5 3.5 3.5 3.5
25 A 3.5 3.5 3.5 3.5 3.5 5.5
30 A 3.5 3.5 3.5 3.5 5.5 5.5
35 A 3.5 3.5 3.5 5.5 5.5 8
40 A 3.5 3.5 3.5 5.5 5.5 8

17
7-2. Connecting Load Cables
WARNING : ELECTRIC SHOCK
Before connecting or disconnecting the load cables to/from the output
terminal, always turn the output circuit breakers to the OFF position, stop the
engine, and remove the engine key.
The person performing the maintenance should always keep the key.
Close the output terminal cover before operating.
Do not touch the generator if the Alternator or casing becomes wet during
operation.
CAUTION : FIRE
Do not connect the generator output to indoor wiring.
< Note >
 When connecting a load, check that the generator output setting, output terminal connection
position,andloadpowersourceareallmatching.
If using the O terminal, be careful that the currents of each phase are uniform.
Use proper tools when connecting a load to sufficiently tighten the connection. Failure to
sufficiently tighten the connection will result in cable burnout.
(1) 3-Phase Output Terminal
For 3-phase load:
Terminal voltage is 400/440 V [200/220 V] (50/60Hz).
* The values in brackets are for when set to 200/220V.
For 1-phase load:
Terminal voltage is 230/254 V [115/127 V] (50/60Hz).
* The values in brackets are for when set to 200/220V.
Load
R S T O
R S T O
Load