Electric Motor Owner’s Manual WARNING: Read carefully and understand all ASSEMBLY AND OPERATION INSTRUCTIONS before operating. Failure to follow the safety rules and other basic safety precautions may result in serious personal injury.
Thank you very much for choosing an Ironton™ product! For future reference, please complete the owner’s record below: Serial Number/Lot Date Code: ________________________________ Purchase Date: ____________________________________________ Save the receipt, warranty, and this manual. It is important that you read the entire manual to become familiar with this product before you begin using it. This electric motor is designed for certain applications only.
Table of Contents Intended Use .......................................................................................................................................... 4 Packaging Contents .............................................................................................................................. 4 Technical Specifications ...................................................................................................................... 4 Important Safety Information .................
Intended Use Ironton Electric Motor Models #51820, #51821, and #51822 are designed for air compressor duty applications, which require a high breakdown torque and may be suitable for other applications having similar loads. Model #63425 is designed for industrial duty air fan motors for air circulators, which may be suitable for other applications such as compressors, pumps, conveyors, blowers, and fans having similar loads.
Important Safety Information ⚠WARNING Read and understand all instructions. Failure to follow all instructions may result in serious injury or property damage. The warnings, cautions, and instructions in this manual cannot cover all possible conditions or situations that could occur. Exercise common sense and caution when using this tool. Always be aware of the environment and ensure that the tool is used in a safe and responsible manner.
parts. Air vents on the tool often cover moving parts and should be avoided. Wear the proper personal protective equipment when necessary. Use ANSI Z87.1 compliant safety goggles (not safety glasses) with side shields, or when needed, a face shield. Use a dust mask in dusty work conditions. Also use non-skid safety shoes, hardhat, gloves, dust collection systems, and hearing protection when appropriate. This applies to all persons in the work area. Do not overreach.
⚠CAUTION MOTOR USE AND CARE Motors should be installed, protected, and fused in accordance with the latest issue of National Electrical Code, NEMA Standard Publication No. MG 2, and local codes. Frames and accessories of motors should be grounded in accordance with the National Electrical Code (NEC) Article 430. For general information on grounding, refer to NEC Article 250. Rotating parts such as pulleys, couplings, external fans, and shaft extensions should be permanently guarded.
Motors are all fully factory-tested and inspected before shipping. Damage during shipment and storage can occur. Motors not correctly matched to the power supply and/or the load will not operate properly. These instructions are intended as a guide to identify and eliminate these problems before they are overlooked or cause further damage. Storage A. Keep the motor clean. a. Store it indoors. b. Keep the motor covered to eliminate airborne dust and dirt.
In selecting a location for the motor, consideration should be given to the environment and ventilation. A motor with the proper enclosure for the expected operating condition should be selected. The ambient temperature of the air surrounding the motor should not exceed 40°C (104°F) unless the motor has been especially designed for high ambient temperature applications. The free flow of air around the motor should not be obstructed.
Examples: 1. Motors equipped with built-in thermal protection have THERMALLY PROTECTED stamped on the nameplate . Thermal protectors open the motor circuit electrically when the motor overheats or is overloaded. 2. The protector cannot be reset until the motor cools. If the protector is automatic, it will reset itself. If the protector is manual, you will need to press the red button to reset. 3. Motors without thermal protection do not have a label on the nameplate. 4.
Recommended Maintenance ⚠WARNING Disconnect the power before servicing the motor or driven equipment. Motors with automatic thermal protectors will automatically restart when the protector temperature drops sufficiently. Do not use motors with automatic thermal protectors in applications where automatic restart will be hazardous to persons or equipment. Motors are properly lubricated at the time of manufacture. It is not necessary to lubricate at the time of installation.
RECOMMENDED COPPER WIRE GUAGE & TRANSFORMER SIZE SINGLE PHASE MOTORS - 230 VOLTS H.P. 1 1/2 2 3 5 7 1/2 TRANSFORMER KVA 100 3 3 5 7 1/2 10 10 10 8 6 6 DISTANCE - MOTOR TO TRANSF. IN FT. 150 200 300 8 8 8 4 4 8 8 6 4 3 6 6 4 2 1 500 4 4 2 0 0 The motor service and any troubleshooting must be handled by qualified persons who have proper tools and equipment. Note: Motors should only be disassembled by an authorized service station. ISSUE CAUSE ACTION Replace fuses with the proper type and rating.
ISSUE Motor takes too long to accelerate and/or draws high amp Wrong rotation CAUSE ACTION Open primary circuit Locate fault with a testing device and repair. Excessive load Reduce the load. Check for high resistance. Ensure adequate wire size is being used. Low voltage during start Defective squirrel cage rotor Replace with new rotor. Applied voltage too low Have the power company increase the power tap. Wrong sequence of phases Reverse the connections at the motor or at the switchboard.
ISSUE Noisy operation Hot bearings ball CAUSE ACTION Pulley diameter too small Misalignment Insufficient grease Deterioration of grease or lubricant contaminated Use larger pulleys. Realign the drive. Maintain proper quantity of grease in bearing. Remove old grease, wash bearings thoroughly in kerosene, and replace with new grease. Parts Diagram Note: Motors should only be disassembled by an authorized service station.
Limited Warranty Northern Tool and Equipment Company, Inc. ("We'' or ''Us'') warrants to the original purchaser only (''You'' or ''Your'') that the Ironton product purchased will be free from material defects in both materials and workmanship, normal wear and tear excepted, for a period of 90 days from date of purchase. The foregoing warranty is valid only if the installation and use of the product is strictly in accordance with product instructions.
Distributed by: Northern Tool & Equipment Company, Inc. Burnsville, Minnesota 55306 www.northerntool.
