MODEL 4050 7 HP Generator Item # 56400 Owner’s Manual Manual del Propietario Questions? Problems? Please call our customer help line: (800) 232-1195 M-F 8-5 CST FEATURES • • • • • • • • • 4050 Surge Watt Output 3500 Rated Watt Output Powerful Enough to Run Essential Appliances During Power Outages 120 and 240 Volt AC Outputs Low Oil Automatic Shutoff Circuit Breaker for Overload Protection 4 Gallon Fuel Tank Capacity Spark Arrester Meets EPA Emission Standards 2014 www.wenproducts.
GENERATOR IDENTIFICATION For information and questions, please contact the Customer Service Help Line by calling 800-2321195. Certain information will be requested by the Customer Service Representative and to facilitate that, please fill in the information below. Refer to the illustration below for the location of Serial Number. Record generator information in the spaces provided below.
TABLE OF CONTENTS GENERATOR IDENTIFICATION ................................................................................................i SERVICE RECORD .........................................................................................................................i INTRODUCTION ............................................................................................................................ 1 SAFETY INFORMATION...........................................................................
INTRODUCTION Thank You for Purchasing a WEN® Product. . This manual provides information regarding the safe operation and maintenance of this product. Every effort has been made to ensure the accuracy of the information in this manual. WEN® reserves the right to change this product and specifications at any time without prior notice. Please keep this manual available to all users during the entire life of the generator.
SAFETY INFORMATION Before operating this generator read and observe all warnings, cautions, and instructions on this sheet, on the generator, and in the Owner’s Manual. NOTE: The following safety information is not meant to cover all possible conditions and situations that may occur. Read the entire Owner’s Manual for safety and operating instructions. Failure to follow instructions and safety information could result in serious injury or death.
GENERAL SAFETY PROCEDURES For any questions regarding the hazard and safety notices listed in this manual or on the product, please call (800) 232-1195 M-F 8-5 CST before using the generator. DANGER: CARBON MONOXIDE. Using a generator indoors CAN KILL YOU IN MINUTES. Generator exhaust contains carbon monoxide (CO). This is a poison gas you cannot see or smell. If you can smell the generator exhaust, you are breathing CO. But even if you cannot smell the exhaust, you could be breathing CO.
WARNING: This generator produces powerful voltage, which can result in electrocution. • • • • • • ALWAYS ground the generator before using it (see the “Ground the Generator” portion of the “GENERATOR PREPARATION” section). Generator should only be plugged into electrical devices, either directly or with an extension cord. NEVER connect to a building electrical system without a qualified electrician. Such connections must comply with local electrical laws and codes.
IMPORTANT SAFETY INSTRUCTIONS • SAVE THESE INSTRUCTIONS – This manual contains important instructions for WEN 4050 generator that should be followed during installation and maintenance of the generator. • Generators vibrate in normal use. During and after the use of the generator, inspect the generator as well as extension and power supply cords connected to it for damage resulting from vibration. Have damaged items repaired or replaced as necessary.
PACKAGE CONTENTS WARNING: This generator is heavy. Some procedures may require lifting equipment or two people. Your generator comes with the items listed below. Please check to see that all of the following items are included with your generator.
GENERATOR COMPONENTS Please familiarize yourself with the locations and functions of the various components and controls of your generator. 3 1 2 4 5 6 14 13 7 8 12 11 9 10 (1) Fuel Gauge- Indicates the amount of fuel in the tank. (2) Fuel Cap- Access to the fuel tank for adding fuel. (3) 120 Volt AC Duplex Receptacle- To connect electrical devices that run 120 Volt, 60 Hz, single phase, AC current. (4) Circuit Reset Buttons- Reset buttons that protect the generator from electrical overload.
GENERATOR PREPARATION Using the Generator for the First Time The following section describes steps necessary to prepare the generator for use. If after reading this section, you are unsure about how to perform any of the steps please call (800) 232-1195 M-F 8-5 CST for customer service. Failure to perform these steps properly can damage the generator or shorten its life. WEN 4050 generator was completely assembled at the factory.
Step 2- Add Gasoline WARNING: This generator may emit highly flammable and explosive gasoline vapors, which can cause severe burns or even death if ignited. A nearby open flame can lead to explosion even if not directly in contact with gasoline. • • • • • • • • Do not operate near open flame. Do not smoke near generator. Always operate on a firm, level surface. Always turn generator off before refueling. Allow generator to cool for at least 2 minutes before removing fuel cap.
Step 3- Ground the Generator WARNING: Failure to properly ground the generator can result in electrocution. Ground the generator by tightening the grounding nut against grounding wire (see figure 4). A generally acceptable grounding wire is a No. 12 AWG (American Wire Gauge) stranded copper wire. This grounding wire should be connected at the other end to a copper or brass grounding rod that is driven into the earth. Wire and grounding rod are not included in generator contents.
STARTING THE GENERATOR Before starting the generator, make sure you have read and performed the steps in the “Generator Preparation” section of this manual. If you are unsure about how to perform any of the steps in this manual please call (800) 232-1195 M-F 8-5 CST for customer service. DANGER: CARBON MONOXIDE. Using a generator indoors CAN KILL YOU IN MINUTES. Generator exhaust contains carbon monoxide (CO). This is a poison gas you cannot see or smell.
To start your generator, perform the following steps: 1. No electrical devices should be connected to the generator during starting. Devices can make it difficult for the engine to start. 2. Check that the generator is properly grounded (see “Ground the Generator”). 3. Check the oil and fuel levels. 4. Turn the fuel valve to the “on” position (see figure 5). 5. Move the choke lever to the “closed” position (see figure 6). 6. Set the engine switch to the “on” position. 7.
SUBSEQUENT STARTING OF THE GENERATOR If this is not the first time using the generator, user should take the following steps to prepare it for operation. IMPORTANT: At this point the user should be familiar with the procedures described in the section titled “Using the Generator for the First Time.” If the user has not yet read this section, go back and read it now. Step 1- Check the Oil Oil consumption is normal during generator usage.
Step 3- Ground the Generator WARNING: Failure to properly ground the generator can result in electrocution. Ground the generator by tightening the grounding nut on the front control panel against a grounding wire. (Figure 11) A generally acceptable grounding wire is a No. 12 AWG (American Wire Gauge) stranded copper wire. This grounding wire should be connected at the other end to a copper or brass rod that is driven into the earth. Wire and grounding rod are not included in generator contents.
USING THE GENERATOR WARNING: When this generator is used to supply a building wiring system: Generator must be installed by a qualified electrician and connected to a transfer switch as a separately derived system in accordance with the National Electrical Code, NFPA 70. The generator shall be connected to a transfer switch that switches all conductors other than the equipment grounding conductor. The frame of the generator shall be connected to an approved grounding electrode.
generator, DO NOT connect all these devices. Select a combination of electrical devices, which has a total rated wattage lower than or equal to the rated wattage of the generator. CAUTION: The generator can run at its surge wattage capacity for only a short time. Connect electrical devices requiring a rated (running) wattage equal to or less than the rated wattage of the generator. Never connect devices requiring a rated wattage equal to the surge wattage of the generator.
3. Move the voltage selector to the desired position. Move the switch to the left to use the standard 120 Volt receptacles. Move the switch to the right to use the 240/120 Volt NEMA receptacle. 4. The power indicator lights will light accordingly as the Volt Selector is selected. They light up when the receptacles receive power. In the case of the 240/120 Volt receptacle, both lights MUST light up for 240/120 Volts of power. If only one light comes on, DO NOT USE the receptacle.
HIGH ALTITUDE OPERATION ABOVE 3000 FEET The fuel system on this generator may be influenced by operation at higher altitudes. Proper operation can be ensured by installing an altitude kit at altitudes higher than 3000 feet above sea level. At elevations above 8000 feet, the engine may experience decrease performance, even with the proper main jet. Operating this generator without the proper altitude kit installed may increase the engine’s emissions and decrease fuel economy and performance.
STOPPING THE GENERATOR To stop the generator: 1. Turn off all electrical devices prior to unplugging them from the generator. Unplugging running devices can cause damage to the generator. 2. Turn the engine switch to the “OFF” position. 3. Turn the fuel valve to the “OFF” (horizontal) position. WARNING: Allow the generator to cool for several minutes before touching areas that become hot during use.
MAINTENANCE / CARE Proper routine maintenance of your generator will help prolong the life of your machine. Please perform maintenance checks and operations according the schedule in figure 11. If you have questions about any of the maintenance procedures listed in this manual, please call (800) 232-1195 M-F 8-5 CST. CAUTION: Never perform maintenance operations while the generator is running.
Figure 12- Checking the oil Changing/ Adding Oil Change the oil according to the maintenance schedule in figure 11. Change the oil when the engine is warm. This will allow for complete drainage. Change oil more often if operating under heavy load or high ambient temperatures. It is also necessary to drain the oil from the crankcase if it has become contaminated with water or dirt. The oil capacity of the engine in this generator is 20 fluid oz. Add oil when the oil level is low.
Air Cleaner Maintenance Routine maintenance of the air cleaner helps maintain proper air flow to the carburetor. Check that the air cleaner is free of excessive dirt. 1. 2. 3. 4. 5. Unscrew the air cleaner cover (see figure 15). Remove the sponge-like element from the casing. Wipe the dirt from inside the empty air cleaner casing Wash the sponge-like element in household detergent and warm water. Allow to dry. Reinstall the sponge-like element in the air cleaner casing and reinstall the cover.
Spark Plug Maintenance The spark plug is important for proper engine operation. A good spark plug should be intact, free of deposits, and properly gapped. To inspect the spark plug: 1. Pull on the spark plug cap to remove it. 2. Unscrew the spark plug from the generator using the spark plug wrench included with this product (see figure 17). 3. Visually inspect the spark plug. If it is cracked or chipped, discard and replace with a new spark plug. 4. Measure the plug gap with a gauge (see figure 18).
Spark Arrester Cleaning Allow the engine to cool completely before servicing the spark arrester. Remove the screw holding the cover plate which retains the end of the spark arrester to the muffler. Remove the spark arrester screen. Carefully remove the carbon deposits from the spark arrester screen with a wire brush. Replace the spark arrester if it is damaged. Position the spark arrester in the muffler and attach with the screw.
SPECIFICATIONS Generator AC Output Rated Wattage 3500 W Surge Wattage 4050 W Rated Voltage 240V/120 V Rated Amperage 14.5A/29A Rated Frequency 60 Hz Phase Single Dimensions(in): length= 24.4 width= 17.7 height= 18.5 Weight 95 lbs Engine Engine type Ignition system 4-stroke OHV single cylinder with forced air cooling system non-contact transistor Displacement 212 cc Fuel tank capacity: 15 L (4 US gal.) Oil capacity 0.6 L (20 fl oz.
TROUBLESHOOTING IMPORTANT: If trouble persists please call our customer help line at (800) 232-1195 M-F 8-5 Central Time. Problem Cause Engine will not start Engine switch is set to "OFF". Set engine switch to "ON". Fuel valve is turned to "OFF". Turn fuel valve to "ON" position. Choke is open. Close the choke Engine is out of fuel. Engine is filled with contaminated or old gasoline. Spark plug is dirty. Spark plug is broken. Generator is not on level surface. Oil is low.
EXPLODED VIEW AND PARTS LIST 27
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WIRING DIAGRAM 32
NOTES: 33
WARRANTY STATEMENT FOR WEN®GENERATORS WEN®generators are warranted (to the original purchaser) to be free from defects in materials and workmanship for a period of two (2) years from the date of original purchase. Generators used for commercial or for rental have a warranty period of 90 days from date of original purchase. Please fill out and mail the enclosed warranty card and mail it to Power Pro Technology along with a copy of the receipt. The information is required to process warranty claims.
