OPERATION AND PARTS MANUAL
MQ POWER WHISPERWATT™ SERIES
MODEL DCA250SSI
MODEL DCA250SSIU
60HZ GENERATORS
(ISUZU BH6UZ1X DIESEL ENGINE)
PARTS LIST NO. C1871301704 — DCA250SSI
PARTS LIST NO. M5871300004 — DCA250SSU
Revision #0 (01/12/11)
To find the latest revision of this publication, visit our website at: www.multiquip.com
THIS MANUAL MUST ACCOMPANY THE EQUIPMENT AT ALL TIMES.
PROPOSITION 65 WARNING
Diesel engine exhaust and some of
PAGE 2 — DCA250SSI/DCA250SSIU GENERATOR • OPERATION AND PARTS MANUAL — REV. #0 (01/12/11)
REPORTING SAFETY DEFECTS
If you believe that your vehicle has a defect that could cause a crash or could cause injury or death, you should immediately inform the National Highway Traffic Safety Administration (NHTSA) in addition to notifying Multiquip at 1-800-421-1244.
If NHTSA receives similar complaints, it may open an investigation, and if it finds that a safety defect exists in a group of vehicles, it may order a recall and remedy campaign. However, NHTSA cannot become involved in individual problems between you, your dealer, or Multiquip.
To contact NHTSA, you may either call the Vehicle Safety Hotline toll-free at 1-888- 327-4236 (TTY: 1-800-424-9153), go to http://www.nhtsa.dot.gov; or write to:
Administrator
NHTSA
1200 New Jersey Avenue S.E.
Washington, DC 20590
You can also obtain information about motor vehicle safety from
http://www.safecar.gov.
DCA250SSI/DCA250SSIU GENERATOR • OPERATION AND PARTS MANUAL — REV. #0 (01/12/11) — PAGE 3
TABLE OF CONTENTS
DCA250SSI/DCA250SSIU 60HZ GENERATORS
Proposition 65 Warning ........................................... |
2 |
Reporting Safety Defects......................................... |
3 |
Table Of Contents.................................................... |
4 |
Parts Ordering Procedures...................................... |
5 |
Safety Information .............................................. |
6-11 |
Specifi cations ........................................................ |
12 |
Dimensions............................................................ |
13 |
Installation ........................................................ |
14-15 |
General Information............................................... |
16 |
Major Components ................................................ |
17 |
Generator Control Panel................................... |
18-19 |
Engine Operating Panel......................................... |
20 |
Output Terminal Panel Familiarization .............. |
22-24 |
Load Application.................................................... |
25 |
Generator Outputs............................................ |
26-27 |
Gauge Reading ..................................................... |
27 |
Output Terminal Panel Connections ................. |
28-29 |
Inspection/Setup............................................... |
30-33 |
Generator Start-Up Procedure (Manual) .......... |
34-35 |
Generator Start-Up Procedure (Auto Mode).......... |
36 |
Generator Shut-Down Procedures ........................ |
37 |
Maintenance..................................................... |
38-41 |
Trailer Maintenance .......................................... |
42-45 |
Trailer Wiring Diagram ........................................... |
46 |
Generator Wiring Diagram..................................... |
47 |
Engine Wiring Diagram.......................................... |
48 |
Controller Wiring Diagram ..................................... |
49 |
Troubleshooting (Generator).................................. |
50 |
Troubleshooting (Engine Controller) ...................... |
51 |
Troubleshooting (Diagnostic Lamp) ....................... |
52 |
Explanation Of Code In Remarks Column............. |
54 |
Suggested Spare Parts ......................................... |
55 |
Component Drawings
Generator Assembly......................................... |
56-59 |
Engine Operating Panel Assembly ................... |
60-61 |
Control Box Assembly ...................................... |
62-67 |
Engine and Radiator Assembly ........................ |
68-71 |
Output Terminal Assembly................................ |
72-75 |
Battery Assembly (DCA250SSI)....................... |
76-77 |
Battery Assembly (DCA250SSIU) .................... |
78-79 |
Muffl er Assembly .............................................. |
80-81 |
Fuel Tank Assembly.......................................... |
82-85 |
Enclosure Assembly ......................................... |
86-91 |
Rubber Seals Assembly ................................... |
92-93 |
Nameplate and Decals Assy. (DCA250SSI) ..... |
94-97 |
Nameplate and Decals Assy. (DCA250SSIU) 98-101 |
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Terms and Conditions Of Sale — Parts............... |
102 |
NOTICE
Specifi cations and part numbers are subject to change without notice.
PAGE 4 — DCA250SSI/DCA250SSIU GENERATOR • OPERATION AND PARTS MANUAL — REV. #0 (01/12/11)
www.multiquip.com
PARTS ORDERING PROCEDURES
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Ordering parts has never been easier! |
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Choose from three easy options: |
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Effective: |
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January 1st, 2006 |
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Best Deal! Order via Internet (Dealers Only): |
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If you have an MQ Account, to obtain a Username |
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Order parts on-line using Multiquip’s SmartEquip website! |
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and Password, E-mail us at: parts@multiquip. |
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■ View Parts Diagrams |
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com. |
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■ Order Parts |
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To obtain an MQ Account, contact your |
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■ Print Specification Information |
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District Sales Manager for more information. |
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Goto www.multiquip.com and click on |
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Use the internet and qualify for a 5% Discount |
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on Standard orders for all orders which include |
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Order |
Parts |
to log in and save! |
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complete part numbers.* |
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Note: Discounts Are Subject To Change |
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Order via Fax (Dealers Only): |
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Fax your order in and qualify for a 2% Discount |
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All customers are welcome to order parts via Fax. |
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on Standard orders for all orders which include |
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Domestic (US) Customers dial: |
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complete part numbers.* |
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1-800-6-PARTS-7 (800-672-7877) |
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Note: Discounts Are Subject To Change |
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Order via Phone: |
Domestic (US) Dealers Call: |
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1-800-427-1244 |
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Non-Dealer Customers: |
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International Customers should contact |
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Contact your local Multiquip Dealer for |
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their local Multiquip Representatives for |
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parts or call 800-427-1244 for help in |
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Parts Ordering information. |
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locating a dealer near you. |
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When ordering parts, please supply: |
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Dealer Account Number |
Specify Preferred Method of Shipment: |
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Dealer Name and Address |
UPS/Fed Ex |
DHL |
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Shipping Address (if different than billing address) |
Priority One |
Truck |
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Return Fax Number |
Ground |
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Next Day |
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Applicable Model Number |
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Second/Third Day |
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Quantity, Part Number and Description of Each Part
NOTICE
All orders are treated as Standard Orders and will ship the same day if received prior to 3PM PST.
WE ACCEPT ALL MAJOR CREDIT CARDS!
DCA250SSI/DCA250SSIU GENERATOR • OPERATION AND PARTS MANUAL — REV. #0 (01/12/11) — PAGE 5
SAFETY INFORMATION
Do not operate or service the equipment before reading the entire manual. Safety precautions should be followed at all times when operating this equipment. Failure to read and understand the safety messages and operating instructions could result in injury to yourself and others.
SAFETY MESSAGES
The four safety messages shown below will inform you about potential hazards that could injure you or others.The safety messages specifi cally address the level of exposure to the operator and are preceded by one of four words:
DANGER, WARNING, CAUTION or NOTICE.
SAFETY SYMBOLS
DANGER
Indicates a hazardous situation which, if not avoided,
WILL result in DEATH or SERIOUS INJURY.
WARNING
Indicates a hazardous situation which, if not avoided,
COULD result in DEATH or SERIOUS INJURY.
CAUTION
Indicates a hazardous situation which, if not avoided,
COULD result in MINOR or MODERATE INJURY.
NOTICE
Addresses practices not related to personal injury.
Potential hazards associated with the operation of this equipment will be referenced with hazard symbols which may appear throughout this manual in conjunction with safety messages.
PAGE 6 — DCA250SSI/DCA250SSIU GENERATOR • OPERATION AND PARTS MANUAL — REV. #0 (01/12/11)
SAFETY INFORMATION
GENERAL SAFETY
CAUTION
NEVER operate this equipment without proper protective clothing, shatterproof glasses, respiratory protection, hearing protection, steel-toed boots and other protective devices required by the job or city and state regulations.
NEVER operate this equipment when not feeling well due to fatigue, illness or when under medication.
NEVER operate this equipment under the infl uence of drugs or alcohol.
ALWAYS check the equipment for loosened threads or bolts before starting.
DO NOT use the equipment for any purpose other than its intended purposes or applications.
NOTICE
This equipment should only be operated by trained and qualifi ed personnel 18 years of age and older.
Whenever necessary, replace nameplate, operation and safety decals when they become diffi cult read.
Manufacturer does not assume responsibility for any accident due to equipment modifi cations. Unauthorized equipment modifi cation will void all warranties.
NEVER use accessories or attachments that are not recommended by MQ Power for this equipment. Damage to the equipment and/or injury to user may result.
ALWAYS know the location of the nearest
fire extinguisher.
ALWAYS know the location of the nearest
first aid kit.
ALWAYS know the location of the nearest
phone or keep a phone on the job site. Also, know the phone numbers of the nearest ambulance, doctor and fire department. This information will be invaluable in the case of an emergency.
GENERATOR SAFETY
DANGER
NEVER operate the equipment in an explosive atmosphere or near combustible materials.An explosion or fire could result causing severe bodily harm or even death.
WARNING
NEVER disconnect any emergency or safety devices.
These devices are intended for operator safety. Disconnection of these devices can cause severe injury, bodily harm or even death. Disconnection of any of these devices will void all warranties.
CAUTION
NEVER lubricate components or attempt service on a running machine.
NOTICE
ALWAYS ensure generator is on level ground before use.
ALWAYS keep the machine in proper running condition.
Fix damage to machine and replace any broken parts immediately.
ALWAYS store equipment properly when it is not being used. Equipment should be stored in a clean, dry location out of the reach of children and unauthorized personnel
DCA250SSI/DCA250SSIU GENERATOR • OPERATION AND PARTS MANUAL — REV. #0 (01/12/11) — PAGE 7
SAFETY INFORMATION
ENGINE SAFETY
DANGER
The engine fuel exhaust gases contain poisonous carbon monoxide. This gas is colorless and odorless, and can cause death if inhaled.
The engine of this equipment requires an adequate free fl ow of cooling air. NEVER
operate this equipment in any enclosed or narrow area where free fl ow of the air is
restricted. If the air fl ow is
restricted it will cause injury to people and property and serious damage to the equipment or engine.
WARNING
DO NOT place hands or fingers inside engine compartment when engine is running.
NEVER operate the engine with heat shields or guards removed.
Keep fi ngers, hands hair and clothing away
from all moving parts to prevent injury.
DO NOT remove the radiator cap while the engine is hot. High pressure boiling water will gush out of the radiator and severely scald any persons in the general area of the generator.
DO NOT remove the coolant drain plug while the engine is hot. Hot coolant will gush out of the coolant tank and severely scald any persons in the general area of the generator.
DO NOT remove the engine oil drain plug while the engine is hot. Hot oil will gush out of the oil tank and severely scald any persons in the general area of the generator.
CAUTION
NEVER touch the hot exhaust manifold, muffler or cylinder. Allow these parts to cool
before servicing equipment.
NOTICE
NEVER run engine without an air fi lter or with a dirty air fi lter. Severe engine damage may occur. Service air fi lter frequently to prevent engine malfunction.
NEVER tamper with the factory settings of the engine or engine governor. Damage
to the engine or equipment can result
if operating in speed ranges above the maximum allowable.
Wet stacking is a common problem with diesel engines which are operated for extended periods with light or no load applied. When a diesel engine operates without suffi cient load (less than 40% of the rated output), it will not operate at its optimum temperature. This will allow unburned fuel to accumulate in the exhaust system, which can foul the fuel injectors, engine valves and exhaust system, including turbochargers, and reduce the operating performance.
In order for a diesel engine to operate at peak effi ciency, it must be able to provide fuel and air in the proper ratio and at a high enough engine temperature for the engine to completely burn all of the fuel.
Wet stacking does not usually cause any permanent damage and can be alleviated if additional load is applied to relieve the condition. It can reduce the system performance and increase maintenance. Applying an increasing load over a period of time until the excess fuel is burned off and the system capacity is reached usually can repair the condition. This can take several hours to burn off the accumulated unburned fuel.
State Health Safety Codes and Public Resources Codes specify that in certain locations, spark arresters must be used on internal combustion engines that use hydrocarbon fuels. A spark arrester is a device designed to prevent accidental discharge of sparks or fl ames from the engine exhaust. Spark arresters are qualifi ed and rated by the United States Forest Service for this purpose. In order to comply with local laws regarding spark arresters, consult the engine distributor or the local Health and Safety Administrator.
PAGE 8 — DCA250SSI/DCA250SSIU GENERATOR • OPERATION AND PARTS MANUAL — REV. #0 (01/12/11)
SAFETY INFORMATION
FUEL SAFETY
DANGER
DO NOT start the engine near spilled fuel or combustible fl uids. Diesel fuel is extremely fl ammable and its vapors can cause an explosion if ignited.
ALWAYS refuel in a well-ventilated area, away from sparks and open fl ames.
ALWAYS use extreme caution when working with
flammable liquids.
DO NOT fi ll the fuel tank while the engine is running or hot.
DO NOT overfi ll tank, since spilled fuel could ignite if it comes into contact with hot engine parts or sparks from the ignition system.
Store fuel in appropriate containers, in well-ventilated areas and away from sparks and fl ames.
NEVER use fuel as a cleaning agent.
DO NOT smoke around or near the equipment. Fire or explosion could result
from fuel vapors or if fuel is spilled on a hot engine.
TOWING SAFETY
CAUTION
Check with your local county or state safety towing regulations, in addition to meeting
Department of Transportation (DOT) SafetyTowing Regulations, before towing your generator.
Refer to MQ Power trailer manual for additional safety information.
In order to reduce the possibility of an accident while transporting the generator on public roads, ALWAYS make sure the trailer that supports the generator and the towing vehicle are mechanically sound and in good operating condition.
ALWAYS shutdown engine before transporting
Make sure the hitch and coupling of the towing vehicle are rated equal to, or greater than the trailer “gross vehicle weight rating.”
ALWAYS inspect the hitch and coupling for wear. NEVER tow a trailer with defective hitches, couplings, chains, etc.
Check the tire air pressure on both towing vehicle and trailer. Trailer tires should be inflated to 50 psi cold.
Also check the tire tread wear on both vehicles.
ALWAYS make sure the trailer is equipped with a safety chain.
ALWAYS properly attach trailer’s safety chains to towing vehicle.
ALWAYS make sure the vehicle and trailer directional, backup, brake and trailer lights are connected and working properly.
DOT Requirements include the following:
•Connect and test electric brake operation.
•Secure portable power cables in cable tray with tie wraps.
The maximum speed for highway towing is 55 MPH unless posted otherwise. Recommended off-road towing is not to exceed 15 MPH or less depending on type of terrain.
Avoid sudden stops and starts.This can cause skidding, or jack-knifi ng. Smooth, gradual starts and stops will improve towing.
Avoid sharp turns to prevent rolling.
Trailer should be adjusted to a level position at all times when towing.
Raise and lock trailer wheel stand in up position when towing.
Place chock blocks underneath wheel to prevent rolling while parked.
Place support blocks underneath the trailer’s bumper to prevent tipping while parked.
Use the trailer’s swivel jack to adjust the trailer height to a level position while parked.
DCA250SSI/DCA250SSIU GENERATOR • OPERATION AND PARTS MANUAL — REV. #0 (01/12/11) — PAGE 9
SAFETY INFORMATION
ELECTRICAL SAFETY
DANGER
DO NOT touch output terminals during operation. Contact with output terminals during operation can cause electrocution, electrical shock or burn.
The electrical voltage required to operate the generator can cause severe
injury or even death through physical contact with live circuits. Turn generator and all circuit breakers OFF before performing maintenance on the generator or making contact with output terminals.
NEVER insert any objects into the output
receptacles during operation. This is extremely dangerous.The possibility exists of electrical shock, electrocution or death.
Backfeed to a utility system can cause electrocution and/or property damage. NEVER connect the generator to a building’s electrical system without a transfer switch or other approved
device. All installations should be
performed by a licensed electrician in accordance with all applicable laws and electrical codes. Failure to do so could result in electrical shock or burn, causing serious injury or even death.
Power Cord/Cable Safety
DANGER
Make sure power cables are securely connected to the generator’s output receptacles. Incorrect connections may cause electrical shock and damage to the generator.
NOTICE
ALWAYS make certain that proper power or extension cord has been selected for the job. See Cable Selection Chart in this manual.
Grounding Safety
DANGER
ALWAYS make sure that electrical circuits are properly grounded to a suitable earth ground (ground rod) per the National Electrical Code (NEC) and local codes before operating generator. Severe injury or death by electrocution can result from operating an ungrounded generator.
NEVER use gas piping as an electrical ground.
NEVER let power cords or cables lay in water.
NEVER stand in water while AC power from the generator is being transferred to a load.
NEVER use damaged or worn cables or cords when connecting equipment to generator. Inspect for cuts in the insulation.
NEVER grab or touch a live power cord or cable with wet hands. The possibility exists of electrical shock, electrocution or death.
PAGE 10 — DCA250SSI/DCA250SSIU GENERATOR • OPERATION AND PARTS MANUAL — REV. #0 (01/12/11)
SAFETY INFORMATION
BATTERY SAFETY
DANGER
DO NOT drop the battery. There is a possibility that the battery will explode.
DO NOT expose the battery to open flames, sparks, cigarettes, etc.The battery contains combustible gases and liquids. If these
gases and liquids come into contact with a fl ame or spark, an explosion could occur.
WARNING
ALWAYS wear safety glasses when handling the battery to avoid eye irritation.The battery contains acids that can cause injury to the eyes and skin.
Use well-insulated gloves when picking up the battery.
ALWAYS keep the battery charged. If the battery is not charged, combustible gas will build up.
ALWAYS recharge the battery in a well-ventilated environment to avoid the risk of a dangerous concentration of combustible gasses.
If the battery liquid (dilute sulfuric acid) comes into contact with clothing or skin, rinse skin or clothing immediately with plenty of water.
If the battery liquid (dilute sulfuric acid) comes into contact with eyes, rinse eyes immediately with plenty of water and contact the nearest doctor or hospital to seek medical attention.
CAUTION
ALWAYS disconnect the NEGATIVE battery terminal before performing service on the generator.
ALWAYS keep battery cables in good working condition. Repair or replace all worn cables.
ENVIRONMENTAL SAFETY
NOTICE
Dispose of hazardous waste properly. Examples of potentially hazardous waste are used motor oil, fuel and fuel fi lters.
DO NOT use food or plastic containers to dispose of hazardous waste.
DO NOT pour waste, oil or fuel directly onto the ground, down a drain or into any water source.
DCA250SSI/DCA250SSIU GENERATOR • OPERATION AND PARTS MANUAL — REV. #0 (01/12/11) — PAGE 11
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SPECIFICATIONS |
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Table 1. Generator Specifications |
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Model |
DCA250SSI/DCA250SSIU |
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Type |
Revolving fi eld, self ventilated, |
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open protected type synchronous generator |
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Armature Connection |
Star with Neutral |
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Phase |
3 |
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Standby Output |
220 kW (275 kVA) |
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Prime Output |
200 kW (250 kVA) |
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Voltage — 1Ø |
120,127,139, 240, 254 and 277V |
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Voltage — 3Ø |
208, 220, 240, 416, 440 and 480V |
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Frequency |
60 Hz |
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Speed |
1800 rpm |
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Power Factor |
0.8 |
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Aux. AC Power |
Single Phase, 60 Hz |
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Aux. Voltage/Output |
120VAC/4.8 Kw (2.4 kW x 2) |
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Sound Level dB (A) |
68 |
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Full Load at 23 ft. (7.0 Meters) |
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Dry Weight |
8,203 lbs. (3,720 kg)/8,303 lbs. (3,766 kg) |
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Wet Weight |
9,305 lbs. (4, 220 kg)/9,360 lbs. (4, 245 kg)/ |
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Maximum Lifting Capacity |
16,500 lbs. (7,484 kg) |
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Table 2. Engine Specifications |
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Model |
ISUZU BH6UZ1X EPA Tier 3 Certifi ed |
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Type |
4 cycle, water-cooled, direct injection, |
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turbo-charged air-cooled |
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No. of Cylinders |
6 cylinders |
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Bore x Stroke |
4.72 in. x 5.71 in. (120 mm x 145 mm) |
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Displacement |
600 cu. in. (9,839 cc) |
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Rated Output |
308 HP at 1800 rpm |
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Starting |
Electric 24 VDC |
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Coolant Capacity |
14.3 gal. (54.0 liters) |
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Lube Oil Capacity |
10.8 gal. (41.0 liters) |
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Fuel Type |
#2 Diesel Fuel |
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Fuel Tank Capacity |
121 gal. (460 liters)/129 gal. (490 liters) |
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Fuel Consumption |
14.7 gal. (55.8 L)/hr at full load |
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10.9 gal. (41.2 L)/hr at 3/4 load |
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7.5 gal. (28.5 L)/hr at 1/2 load |
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4.4 gal. (16.6 L)/hr at 1/4 load |
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Battery |
12V-150 Ah x 2/4D CCA 925 X 2 |
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PAGE 12 — DCA250SSI/DCA250SSIU GENERATOR • OPERATION AND PARTS MANUAL — REV. #0 (01/12/11)
DIMENSIONS
Figure 1. Dimensions
Table 3. Dimensions
Reference |
Dimension in. (mm.) |
Reference Letter |
Dimension in. (mm) |
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Letter |
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A |
39.40 in. (1,010 mm.) |
F |
44.07 in. (1,130 mm.) |
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B |
39.40 in. (1,010 mm.) |
G |
147.6 in. (3,750 mm.) |
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C |
44.07 in. (1,130 mm.) |
H |
70.80 in. (1,800 mm.) |
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D |
22.8 in. (585 mm.) |
I |
55.11 in. (1,400 mm.) |
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E |
25.19 in. (640 mm.) |
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DCA250SSI/DCA250SSIU GENERATOR • OPERATION AND PARTS MANUAL — REV. #0 (01/12/11) — PAGE 13
INSTALLATION
Figure 2. Typical Generator Grounding Application
PAGE 14 — DCA250SSI/DCA250SSIU GENERATOR • OPERATION AND PARTS MANUAL — REV. #0 (01/12/11)
INSTALLATION
OUTDOOR INSTALLATION
Install the generator in a area that is free of debris, bystanders, and overhead obstructions. Make sure the generator is on secure level ground so that it cannot slide or shift around. Also install the generator in a manner so that the exhaust will not be discharged in the direction of nearby homes.
The installation site must be relatively free from moisture and dust. All electrical equipment should be protected from excessive moisture. Failure to do will result in deterioration of the insulation and will result in short circuits and grounding.
Foreign materials such as dust, sand, lint and abrasive materials have a tendency to cause excessive wear to engine and alternator parts.
CAUTION
Pay close attention to ventilation when operating the generator inside tunnels and caves.The engine exhaust contains noxious elements. Engine exhaust must be routed to a ventilated area.
INDOOR INSTALLATION
Exhaust gases from diesel engines are extremely poisonous. Whenever an engine is installed indoors the exhaust fumes must be vented to the outside. The engine should be installed at least two feet from any outside wall. Using an exhaust pipe which is too long or too small can cause excessive back pressure which will cause the engine to heat excessively and possibly burn the valves.
MOUNTING
The generator must be mounted on a solid foundation (such as concrete) and set fi rmly on the foundation to isolate vibration of the generator when it is running.The generator must set at least 6 inches above the fl oor or grade level (in accordance to NFPA 110, Chapter 5-4.1). DO NOT remove the metal skids on the bottom of the generator. They are to resist damage to the bottom of the generator and to maintain alignment.
GENERATOR GROUNDING
To guard against electrical shock and possible damage to the equipment, it is important to provide a good EARTH ground.
Article 250 (Grounding) of the National Electrical Code (NEC) provides guide lines for proper grounding and specifi es that the cable ground shall be connected to the grounding system of the building as close to the point of cable entry as practical.
NEC articles 250-64(b) and 250-66 set the following grounding requirements:
1.Use one of the following wire types to connect the generator to earth ground.
a.Copper - 8 AWG (5.3 mm2)
b.Aluminum - 6 AWG (8.4 mm2)
2.When grounding the generator (Figure 2) connect the ground cable between the lock washer and the nut on the generator and tighten the nut fully. Connect the other end of the ground cable to earth ground.
3.NEC article 250-52(c) specifies that the earth ground rod should be buried a minimum of 8 ft. into the ground.
NOTICE
When connecting the generator to any buildings electrical system ALWAYS consult with a licensed electrician.
DCA250SSI/DCA250SSIU GENERATOR • OPERATION AND PARTS MANUAL — REV. #0 (01/12/11) — PAGE 15
GENERAL INFORMATION
GENERATOR
The MQ Power Model DCA250SSI/DCA250SSIU are 220 kW generators (Figure 3) that are designed as a high quality portable (requires a trailer for transport) power source for telecom sites, lighting facilities, power tools, submersible pumps and other industrial and construction machinery.
ENGINE OPERATING PANEL
The “Engine Operating Panel” is provided with the following:
Tachometer
Emergency Stop Switch
Water Temperature Gauge
Oil Pressure Gauge
Charging Ammeter Gauge
Fuel Level Gauge
Battery Switch
Pre-Heat Lamp
Engine Alarm Lamps (DCA-250SSI 5 Alarm Lamps)
Engine Alarm Lamps (DCA-250SSIU 4 Alarm Lamps)
Engine Speed Switch
GENERATOR CONTROL PANEL
The “Generator Control Panel” is provided with the following:
Frequency Meter (Hz)
AC Ammeter (Amps)
AC Voltmeter (Volts)
Ammeter Change-Over Switch
Voltmeter Change-Over Switch
Pilot Lamp
Panel Light/Panel Light Switch
3-Pole, 800 amp Main Circuit Breaker
“Control Box” (located behind the Gen. Control Panel)
•Automatic Voltage Regulator
•Current Transformer
•Over-Current Relay
•Voltage Rectifi er
•Starter Relay
•Engine Control Unit (ECU)
•Voltage Change-Over Board
OUTPUT TERMINAL PANEL
The “Output Terminal Panel” is provided with the following:
Three 120/240V output receptacles (CS-6369), 50A
Three auxiliary circuit breakers, 50A
Two 120V output receptacles (GFCI), 20A
Two GFCI circuit breakers, 20A
Eight output busbar terminal lugs (3Ø power)
Battery Charger (Optional)
Water Heater (Optional)
OPEN DELTA EXCITATION SYSTEM
These generators are equipped with the state of the art “Open-Delta” excitation system. The open delta system consist of an electrically independent winding wound among stationary windings of the AC output section.
There are four connections of the open delta A, B, C and D. During steady state loads, the power from the voltage regulator is supplied from the parallel connections of A to B, A to D, and C to D. These three phases of the voltage input to the voltage regulator are then rectifi ed and are the excitation current for the exciter section.
When a heavy load, such as a motor starting or a short circuit occurs, the automatic voltage regulator (AVR) switches the confi guration of the open delta to the series connection of B to C. This has the effect of adding the voltages of each phase to provide higher excitation to the exciter section and thus better voltage response during the application of heavy loads.
The connections of the AVR to the AC output windings are for sensing only. No power is required from these windings. The open-delta design provides virtually unlimited excitation current, offering maximum motor starting capabilities. The excitation does not have a “fixed ceiling” and responds according the demands of the required load.
ENGINE
Each generator is powered by a 6 cylinder, water cooled, direct injection, turbocharged air-cooled ISUZU BH6UZ1X diesel engine. This engine is designed to meet every performance requirement for the generator. Reference Table 2 for engine specifi cations.
In keeping with MQ Power’s policy of constantly improving its products, the specifi cations quoted herein are subject to change without prior notice.
ELECTRIC GOVERNOR SYSTEM
The electric governor system controls the RPMs of the engine. When the engine demand increases or decreases, the governor system regulates the frequency variation to ±.25%.
EXTENSION CABLES
When electric power is to be provided to various tools or loads at some distance from the generator, extension cords are normally used. Cables should be sized to allow for distance in length and amperage so that the voltage drop between the generator and point of use (load) is held to a minimum. Use the cable selection chart (Table 6) as a guide for selecting proper extension cable size.
PAGE 16 — DCA250SSI/DCA250SSIU GENERATOR • OPERATION AND PARTS MANUAL — REV. #0 (01/12/11)
MAJOR COMPONENTS
Table 4. Generator Major Components
ITEM NO. |
DESCRIPTION |
1Air Filter Assembly
2Muffl er Assembly
3Fuel Tank Assembly
4Engine and Radiator Assembly
5Generator Assembly
6Output Receptacles Assembly
7Output Terminal Panel Assembly
8Circuit Breaker Assembly
9Battery Assembly
10Engine Operating Panel Assembly
11Generator Control Panel Assembly
Figure 3. Major Components
DCA250SSI/DCA250SSIU GENERATOR • OPERATION AND PARTS MANUAL — REV. #0 (01/12/11) — PAGE 17
GENERATOR CONTROL PANEL
Figure 4. Generator Control Panel
The defi nitions below describe the controls and functions of the Generator Control Panel (Figure 4).
1.Pilot Lamp — Indicates the system is running.
2.Panel Light — Normally used in dark areas or at night time.When activated, panel lights will illuminate.When the generator is not in use be sure to turn the panel light switch to the OFF position.
3.AC Voltmeter — Indicates the output voltage present at the U,V, and W Output Terminal Lugs.
4.Frequency Meter — Indicates the output frequency in hertz (Hz). Normally 60 Hz.
5.AC Ammeter — Indicates the amount of current the load is drawing from the generator per leg selected by the ammeter phase-selector switch.
6.Voltmeter Change-Over Switch — This switch allows the AC voltmeter to indicate phase to phase voltage between any two phases of the output terminals or to be switched off.
7.Ammeter Change-Over Switch — This switch allows the AC ammeter to indicate the current flowing to the load connected to any phase of the output terminals, or to be switched off. This switch does not effect the generator output in any fashion, it is for current reading only.
8.Panel Light Switch — When activated will turn on control panel light.
9.Voltage Regulator Control — Allows ±15% manual adjustment of the generator’s output voltage.
10.Main Circuit Breaker — This three-pole, 800 amp main breaker is provided to protect the U,V, and W Output Terminal Lugs from overload.
11.Auto On/Off Engine Controller (MPEC) —
This controller has a vertical row of status LED’s (inset), that when lit, indicate that an engine malfunction (fault) has been detected. When a fault
has been detected the engine controller will evaluate the fault and all major faults will shutdown the generator. During cranking cycle, The MPEC will attempt to crank the engine for 10 seconds before disengaging.
If the engine does not engage (start) by the third attempt, the engine will be shutdown by the engine controller’s Over Crank Protection mode. If the engine engages at a speed (RPM’s) that is not safe, the controller will shutdown the engine by initializing the Over Speed Protection mode.
PAGE 18 — DCA250SSI/DCA250SSIU GENERATOR • OPERATION AND PARTS MANUAL — REV. #0 (01/12/11)
GENERATOR CONTROL PANEL
Also the engine controller will shut down the engine in the event of low oil pressure, high coolant temperature, low coolant level, and loss of magnetic pickup.These conditions can be observed by monitoring the LED status indicators on the front of the controller module.
MPEC Control Switch — This switch controls the running of the unit. If this switch is set to the OFF/RESET position, the unit will not run.When this switch is set to the manual position, the generator will start immediately.
If the generator is to be connected to a building’s AC power source via a transfer switch (isolation), place the switch in the AUTO position. In this position, should an outage occur, the automatic transfer switch (ATS) will start the generator automatically via the generator’s autostart contacts conn ected to the ATS’s start contacts. Please refer to your ATS installation manual for further instructions for the correct installation of the auto-start contacts of the geerator to the ATS.
Low Oil Pressure — Indicates the engine pressure has fallen below a safe operating level. The oil pressure is detected using variable resistive values from the oil pressure sending unit. This is considered a major fault.
High Coolant Temperature — Indicates the engine temperature has exceeded a safe operating level. The engine temperature is detected using variable resistive values from the temperature sending unit. This is considered a major fault.
Overcrank Shutdown — Indicates the unit has attempted to start a preprogrammed number of timesand has failed to start. The number of cycles and duration are programmable. It is pre-set at 3 cycles with a 10-second duration. This is considered a major fault.
Overspeed Shutdown — Indicates the engine is running at an unsafe speed. This is considered a major fault.
Engine Running — Indicates that engine is running at a safe operating speed.
Located behind the generator control panel is the Generator Control Box. This box contains some of the necessary electronic components required to make the generator function.
The Control Box is equipped with the following major components:
Over-Current Relay
Voltage Rectifi er (AVR)
Starter Relay
Current Transformer
Voltage Change-Over Board
Three Phase Circuit Breaker
NOTICE
Remember the overcurrent relay monitors the current fl owing from the U,V, and W Output Terminal Lugs to the load.
In the event of a short circuit or over current condition, it will automatically trip the 1000 amp main breaker.
To restore power to the Output Terminal Panel, press the reset button on the overcurrent relay and place the main circuit breaker in the closed position (ON).
DCA250SSI/DCA250SSIU GENERATOR • OPERATION AND PARTS MANUAL — REV. #0 (01/12/11) — PAGE 19
ENGINE OPERATING PANEL
Figure 5. Engine Operating Panel
The defi nitions below describe the controls and functions of the Engine Operating Panel (Figure 5).
1.Tachometer — Indicates engine speed in RPM’s for 60 Hz operation. This meter should indicate 1800 RPM’s when the rated load is applied. In addition a built in hour meter will record the number of operational hours that the generator has been in use.
2.Oil Pressure Gauge — During normal operation this gauge be should read between 28 to 85 psi. (193~586 kPa).When starting the generator the oil pressure may read a little higher, but after the engine warms up the oil pressure should return to the correct pressure range.
3.WaterTemperature Gauge — During normal operation this gauge be should read between 167° and 203°F (75°~95°C).
4.Charging Ammeter Gauge — Indicates the current being supplied by the engine’s alternator which provides current for generator’s control circuits and battery charging system.
5.Fuel Gauge — Indicates amount of diesel fuel available.
6.Engine Warning Lamps — There are three engine warning lamps, they are defi ned as follows:
a.Overheat Lamp — This lamp goes ON when the cooling water temperature rises abnormally. If the lamp goes ON during normal operation of the generator, the emergency shutdown device will stop the engine automatically.
b.Low Oil Pressure Lamp — During normal operation of the generator this lamp should remain OFF. When the
Auto-OFF/Reset-Manual switch is set
to the MANUAL position to start the engine, the lamp will be lit. When the oil pressure rises after start-up the lamp will go OFF. If this lamp is ever lit (ON) during normal operation of the generator, the emergency shutdown device will stop the engine automatically.
c.Low Fuel Level Lamp (DCA250SSI Only) — When this lamp is ON, it is time to stop the engine and add fuel. Remember to let the engine cool before adding fuel.
d.Air Filter Alarm — When the air fi lter element is clogged, this lamp goes ON
indicating the element should be immediately cleaned or replaced.
e. Coolant Level Alarm — This lamp goes ON when the coolant level is low. If this lamp goes ON while the engine is in operation, the emergency shutdown device will automatically stop the engine.
7.Engine Speed Switch — This switch controls the speed of the engine (low/high).
8.Pre-Heat Lamp — When ECU is placed in AUX position, pre-heat lamp will be ON. When pre-heat cycle is completed, lamp will turn OFF.
9.Emergency Stop Button — Push this button inward to stop the engine in the event of an emergency. DO NOT use this button as a means of stopping the engine.
10.Battery Switch — This switch should be set to the ON position during normal operation.When the engine has been stop, place this switch in the OFF position. DO NOT turn this switch during normal operation, it could cause damage to the electrical equipment.
PAGE 20 — DCA250SSI/DCA250SSIU GENERATOR • OPERATION AND PARTS MANUAL — REV. #0 (01/12/11)
NOTES
DCA250SSI/DCA250SSIU GENERATOR • OPERATION AND PARTS MANUAL — REV. #0 (01/12/11) — PAGE 21
OUTPUT TERMINAL PANEL FAMILIARIZATION
OUTPUT TERMINAL PANEL
The Output Terminal Panel (Figure 6) shown below is located on the right-hand side (left from control panel) of the generator. Lift up on the cover to gain access to receptacles and terminal lugs.
NOTICE
Terminal legs “O” and “Ground” are considered bonded grounds.
OUTPUT TERMINAL FAMILIARIZATION
The “Output Terminal Panel ” (Figure 6) is provided with the following:
Three (3) 120/240V output receptacles @ 50 amp
Three (3) Circuit Breakers @ 50 amps
Two (2) 120V GFCI receptacles @ 20 amp
Two (2) GFCI Circuit Breakers @ 20 amps
Eight (8) Output Busbar Terminal Lugs ( U, V, W, O, Ground)
Figure 6. Output Terminal Panel
PAGE 22 — DCA250SSI/DCA250SSIU GENERATOR • OPERATION AND PARTS MANUAL — REV. #0 (01/12/11)
OUTPUT TERMINAL PANEL FAMILIARIZATION
120 VAC GFCI Receptacles
There are two 120 VAC, 20 amp GFCI (Duplex Nema 5-20R) receptacles provided on the output terminal panel. These receptacles can be accessed in any voltage change-over board setting. Each receptacle is protected by a 20 amp circuit breaker. These breakers are located directly above the GFCI receptacles. Remember the load output (current) of both GFCI receptacles is dependent on the load requirements of the U, V, and W output terminal lugs.
Pressing the reset button resets the GFCI receptacle after being tripped. Pressing the test button (See Figure 7) in the center of the receptacle will check the GFCI function. Both receptacles should be tested at least once a month.
Figure 7. G.F.C.I. Receptacle
Twist Lock Dual Voltage 120/240 VAC Receptacles
There are three 120/240V, 50 amp auxiliary twist-lock (CS6369) receptacles (Figure 8) provided on the output terminal panel. These receptacles can only be accessed when the voltage change-over board has been confi gured for 240V operation .
Figure 8. 120/240V Twist-Lock Auxiliary
Receptacles
Each auxiliary receptacle is protected by a 50 amp circuit breaker. These breakers are located directly above the GFCI receptacles. Remember the load output (current) on all three receptacles is dependent on the load requirements of the Output Terminal Lugs.
Turn the voltage regulator control knob (Figure 9) on the control panel to obtain the desired voltage.Turning the knob clockwise will increase the voltage, turning the knob counter-clockwise will decrease the voltage.
Figure 9. Voltage Regulator Control Knob
DCA250SSI/DCA250SSIU GENERATOR • OPERATION AND PARTS MANUAL — REV. #0 (01/12/11) — PAGE 23
OUTPUT TERMINAL PANEL FAMILIARIZATION
Connecting Loads
Loads can be connected to the generator by the Output BusbarTerminal Lugs or the convenience receptacles (Figure 10). Make sure to read the operation manual before attempting to connect a load to the generator.
To protect the output terminals from overload, a 3-pole, 800A main circuit breaker is provided. Make sure to switch ALL circuit breakers to the OFF position prior to starting the engine.
Over Current Relay
An over current relay (Figure 11)is connected to the main circuit breaker. In the event of an overload, both the circuit breaker and the over current relay may trip. If the circuit breaker can not be reset, the reset button on the over current relay must be pressed. The over current relay is located in the control box.
Figure 11. Over Current Relay
Figure 10. Connecting Loads
PAGE 24 — DCA250SSI/DCA250SSIU GENERATOR • OPERATION AND PARTS MANUAL — REV. #0 (01/12/11)
LOAD APPLICATION
SINGLE PHASE LOAD
Always be sure to check the nameplate on the generator and equipment to insure the wattage, amperage, frequency, and voltage requirements are satisfactorily supplied by the generator for operating the equipment.
Generally, the wattage listed on the nameplate of the equipment is its rated output. Equipment may require 130—150% more wattage than the rating on the nameplate, as the wattage is infl uenced by the effi ciency, power factor and starting system of the equipment.
NOTICE
If wattage is not given on the equipment’s name plate, approximate wattage may be determined by multiplying nameplate voltage by the nameplate amperage.
WATTS = VOLTAGE x AMPERAGE
The power factor of this generator is 0.8. SeeTable 5 below when connecting loads.
Table 5. Power Factor By Load
|
Type of Load |
|
|
Power Factor |
||||
Single-phase induction motors |
|
|
0.4-0.75 |
|||||
|
|
|
|
|||||
Electric heaters, incandescent lamps |
|
1.0 |
|
|||||
Fluorescent lamps, mercury lamps |
|
0.4-0.9 |
||||||
Electronic devices, communication |
|
1.0 |
|
|||||
equipment |
|
|
|
|
|
|||
|
|
|
|
|
|
|
||
Common power tools |
|
|
|
0.8 |
|
|||
|
|
|
|
|
|
|
|
|
Table 6. Cable Selection (60 Hz, Single Phase Operation) |
||||||||
|
|
|
|
|
|
|
|
|
Current |
Load in Watts |
Maximum Allowable Cable Length |
||||||
|
|
|
|
|
|
|
|
|
in |
At 100 |
At 200 |
#10 Wire |
#12 Wire |
#14 Wire |
|
#16 Wire |
|
Amperes |
|
|||||||
Volts |
Volts |
|
||||||
|
|
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
2.5 |
300 |
600 |
1000 ft. |
600 ft. |
375 ft. |
|
250 ft. |
|
|
|
|
|
|
|
|
|
|
5 |
600 |
1200 |
500 ft. |
300 ft. |
200 ft. |
|
125 ft. |
|
|
|
|
|
|
|
|
|
|
7.5 |
900 |
1800 |
350 ft. |
200 ft. |
125 ft. |
|
100 ft. |
|
|
|
|
|
|
|
|
|
|
10 |
1200 |
2400 |
250 ft. |
150 ft. |
100 ft. |
|
|
|
|
|
|
|
|
|
|
|
|
15 |
1800 |
3600 |
150 ft. |
100 ft. |
65 ft. |
|
|
|
|
|
|
|
|
|
|
|
|
20 |
2400 |
4800 |
125 ft. |
75 ft. |
50 ft. |
|
|
|
|
|
|
|
|
|
|
|
|
|
CAUTION: Equipment damage can result from low voltage |
|
||||||
|
|
|
|
|
|
|
|
|
THREE PHASE LOAD
When calculating the power requirements for 3-phase power use the following equation:
NOTICE
If 3Ø load (kVA) is not given on the equipment nameplate, approximate 3Ø load may be determined by multiplying voltage by amperage by 1.732.
NOTICE
Motors and motor-driven equipment draw much greater current for starting than during operation.
An inadequate size connecting cable which cannot carry the required load can cause a voltage drop which can burn out the appliance or tool and overheat the cable. SeeTable 6.
When connecting a resistance load such as an incandescent lamp or electric heater, a capacity of up to the generating set’s rated output (kW) can be used.
When connecting a fl uorescent or mercury lamp, a capacity of up to the generating set’s rated output (kW) multiplied by 0.6 can be used.
When connecting an electric drill or other power tools, pay close attention to the required starting current capacity.
When connecting ordinary power tools, a capacity of up to the generating set’s rated output (kW) multiplied by 0.8 can
.
DANGER
Before connecting this generator to any building’s electrical system, a licensed electrician must install an isolation (transfer) switch. Serious damage to the building’s electrical system may occur without this transfer switch.
DCA250SSI/DCA250SSIU GENERATOR • OPERATION AND PARTS MANUAL — REV. #0 (01/12/11) — PAGE 25
GENERATOR OUTPUTS
GENERATOR OUTPUT VOLTAGES
A wide range of voltages are available to supply voltage for many different applications. Voltages are selected by applying jumpers (6) to the voltage change-over board (Figure 12). To obtain some of the voltages as listed in Table 7 (see below) will require a fi ne adjustment using the voltage regulator (VR) control knob located on the control panel.
Voltage Change-Over Board
The voltage change-over board (Figure 12) is located on the control box, behind the generator control panel. This board has been provided for ease of voltage selection.
Generator Amperage
Maximum Amps
Table 8 shows the maximum amps the generator can provide. DO NOT exceed the maximum amps as listed.
Table 8. Generator Maximum Amps
Model |
DCA250SSI/ |
|
DCA250SSIU |
||
|
||
Rated Voltage |
Maximum Amps |
|
|
|
|
Single Phase 120 Volt |
555.5 Amps (4 wire) |
|
|
|
|
Single Phase 240 Volt |
277.7 Amps (4 wire) |
|
|
|
|
Three Phase 240 Volt |
601 Amps |
|
|
|
|
Three Phase 480 Volt |
301 Amps |
|
|
|
Figure 12. Voltage Change-Over Board
CAUTION
NEVER attempt to place jumper plates on the voltage change-over board while the generator is in operation. There exist the possibility of electrocution, electrical shock or burn, which can cause severe bodily harm or even death!
Table 7. Voltages Available
UVWO Output |
Voltage Selector Switch |
Voltage Selector Switch |
|||||
Terminal Lugs |
3-Phase 240/139V Position |
3-Phase 480/270V Position |
|||||
|
|
|
|
|
|
|
|
3Ø Line-Line |
208V |
220V |
240V |
416V |
440V |
480V |
|
|
|
|
|
|
|
|
|
1Ø Line-Neutral |
120V |
127V |
139V |
240V |
254V |
277V |
|
|
|
|
|
|
|
|
|
Voltage Selector Switch Single-Phase 240/120V Position |
|
||||||
|
|
|
|
|
|
|
|
1Ø Line-Neutral/ |
120V |
N/A |
N/A |
240V |
N/A |
N/A |
|
Line-Line |
Line-Neutral |
Line-Line |
|||||
|
|
|
|
||||
|
|
|
|
|
|
|
PAGE 26 — DCA250SSI/DCA250SSIU GENERATOR • OPERATION AND PARTS MANUAL — REV. #0 (01/12/11)
GENERATOR OUTPUTS/GAUGE READING
HOW TO READ THE AC AMMETER AND AC VOLTAGE GAUGES
The AC ammeter and AC voltmeter gauges are controlled by the AC ammeter and AC voltmeter change-over switches.
Both of these switches are located on the control panel and DO NOT effect the generator output. They are provided to help observe how much power is being supplied, produced at the UVWO terminals lugs.
Jumper the voltage change-over board for 3Ø, 240V operation (Figure 13).
Figure 13. Voltage Change-Over Board 240V
Configuration.
AC Voltmeter Gauge Reading
Place the ACVoltmeter Change-Over Switch (See Figure 14) in the W-U position and observe the phase to phase voltage reading between the W and U terminals as indicated on the AC Voltmeter Gauge (Figure 15).
Figure 14. AC Voltmeter |
Figure 15. AC Voltmeter |
Change-Over Switch |
Gauge |
AC Ammeter Gauge Reading
Place the AC Ammeter Change-Over Switch (Figure 16) in the U position and observe the current reading (load drain) on the U terminal as indicated on the AC Ammeter Gauge (Figure 17). This process can be repeated for terminals V and W.
Figure 16. AC Ammeter |
Figure 17. AC Ammeter |
Change-Over Switch |
(Amp Reading on U Lug) |
NOTICE
The ammeter gauge will only show a reading when the Output Terminal Lugs are connected to a load and in use.
DCA250SSI/DCA250SSIU GENERATOR • OPERATION AND PARTS MANUAL — REV. #0 (01/12/11) — PAGE 27
OUTPUT TERMINAL PANEL CONNECTIONS
UVWO TERMINAL OUTPUT VOLTAGES
Various output voltages can be obtained using the UVWO output terminal lugs. The voltages at the terminals are dependent on the placement of the jumpers plates (6) on the Voltage Change-Over Board and the adjustment of the Voltage Regulator Control Knob.
Remember the voltage change-over board determines the range of the output voltage and can be confi gured in two different positions that provide 6 different output voltages at the UVWO output terminals. The generator is shipped from the factory in the 240V confi guration. The voltage regulator (VR) allows the user to increase or decrease the selected voltage.
3Ø-240V UVWO Terminal Output Voltages
1.Jumper the voltage change-over board for 240V operation as shown in Figure 18.
3.Turn the voltage regulator knob (Figure 20) clockwise to increase voltage output, turn counterclockwise to decrease voltage output. Use voltage regulator adjustment knob whenever fi ne tuning of the output voltage is required
Figure 20. Voltage Regulator Knob
1Ø-240V UVWO Terminal Output Voltages
1.Make sure the voltage change-over board is jumpered for 240V operation as shown in Figure 18.
2.Connect the load wires to the UVWO terminals as shown in Figure 21.
Figure 18. Voltage Change-Over Board 240V
Configuration
2.Connect the load wires to the UVWO terminals as shown in Figure 19.
Figure 21. UVWO Terminal Lugs 1Ø-240V
Connections
1Ø-120V UVWO Terminal Output Voltages
1.Make sure the voltage change-over board is jumpered for 240V operation as shown in Figure 18.
2.Adjust voltage regulator knob (Figure 20) for an output of 208V to obtain 120V at the UVWO terminals.
3.Connect the load wires to the UVWO terminals as shown in Figure 22.
Figure 19. UVWO Terminal Lugs
Figure 22. UVWO Terminal Lugs 1Ø-120V
Connections
PAGE 28 — DCA250SSI/DCA250SSIU GENERATOR • OPERATION AND PARTS MANUAL — REV. #0 (01/12/11)
OUTPUT TERMINAL PANEL CONNECTIONS
3Ø-480V UVWO Terminal Output Voltages
1.Jumper the voltage change-over board for 480V operation as shown in Figure 23. This confi guration uses 6 jumper plates in 3 different positions. Remember there are 2 jumper plates at every position. Every jumper plate must be used.
Figure 23. Voltage Change-Over Board 480V
Configuration
2.Connect the load wires to the UVWO terminals as shown in Figure 24.
Figure 24. UVWO Terminal Lugs 3Ø-480V
Connections
NOTICE
ALWAYS make sure that the connections to the UVWO terminals are secure and tight.The possibility of arcing exists, that could cause a fi re.
1Ø-480V UVWO Terminal Output Voltages
1.Make sure the voltage change-over board is jumpered for 480V operation as shown in Figure 23.
2.Connect the load wires to the UVWO terminals as shown in Figure 25.
Figure 25. UVWO Terminal Lugs 1Ø-480V
Connections
1Ø-277V UVWO Terminal Output Voltages
1.Make sure the voltage change-over board is jumpered for 480V operation as shown in Figure 23.
2.Connect the load wires to the UVWO terminals as shown in Figure 26.
Figure 26. UVWO Terminal Lugs 1Ø-277V
Connections
DCA250SSI/DCA250SSIU GENERATOR • OPERATION AND PARTS MANUAL — REV. #0 (01/12/11) — PAGE 29
INSPECTION/SETUP
CIRCUIT BREAKERS
To protect the generator from an overload, a 3-pole, 800 amp, main circuit breaker is provided to protect the U,V, and W Output Terminals from overload. In addition two single-pole, 20 amp GFCI circuit breakers are provided to protect the GFCI receptacles from overload.Three 50 amp load circuit breakers have also been provided to protect the auxiliary receptacles from overload. Make sure to switch ALL circuit breakers to the OFF position prior to starting the engine.
LUBRICATION OIL
Fill the engine crankcase with lubricating oil through the fi ller hole, but DO NOT overfi ll. Make sure the generator is level and verify that the oil level is maintained between the two notches (Figure 27) on the dipstick. See Table 9 for proper selection of engine oil.
Figure 27. Engine Oil Dipstick
When checking the engine oil, be sure to check if the oil is clean. If the oil is not clean, drain the oil by removing the oil drain plug, and refi ll with the specifi ed amount of oil as outlined in the ISUZU Engine Owner’s Manual. Oil should be warm before draining.
Other types of motor oils may be substituted if they meet the following requirements:
API Service Classifi cation CC/SC
API Service Classifi cation CC/SD
API Service Classifi cation CC/SE
API Service Classifi cation CC/SF
Table 9. Recommended Motor Oil
FUEL CHECK
DANGER
Fuel spillage on a hot engine can cause a fire or explosion. If fuel spillage occurs, wipe up the spilled fuel completely to prevent fire hazards. NEVER smoke around or near the generator.
the Fuel System
CAUTION
ONLY properly trained personnel who have read and understand this section should refi ll the fuel tank system.
This generator has an internal fuel tank located inside the trailer frame and may also be equipped with an environmental fuel tank (Figure 28). ALWAYS fi ll the fuel tanks with clean fresh #2 diesel fuel. DO NOT fi ll the fuel tanks beyond their capacities.
Pay attention to the fuel tank capacity when replenishing fuel. The fuel tank cap must be closed tightly after fi lling. Handle fuel in a safety container. If the container does not have a spout, use a funnel. Wipe up any spilled fuel immediately.
Figure 28. Internal Fuel Tank System
PAGE 30 — DCA250SSI/DCA250SSIU GENERATOR • OPERATION AND PARTS MANUAL — REV. #0 (01/12/11)