1. Product Overview
The Fasco D123 is a 3.3-inch general purpose shaded pole motor designed for various applications requiring reliable air movement. It features a 1/4-inch x 2-1/4-inch shaft and is built for durability with a totally enclosed design and sleeve bearings.

Figure 1: Fasco D123 3.3-inch General Purpose Motor. This image displays the compact design of the motor, highlighting its shaft and general construction.
Key Features:
- Model Number: D123
- Motor Type: Shaded pole, general purpose
- Shaft Dimensions: 1/4-inch x 2-1/4-inch
- Voltage: 115 Volts
- RPM: 1500 RPM
- Amperage: 0.6 Amps
- Enclosure: Totally Enclosed
- Rotation: CCWSE (Counter-Clockwise Shaft End)
- Bearings: Sleeve Bearing
- Package Dimensions: 8.3 x 3.9 x 3.7 inches
2. Safety Instructions
Read and understand all safety instructions before installing, operating, or performing maintenance on the motor. Failure to follow these instructions may result in electric shock, fire, serious injury, or death.
- Disconnect Power: Always disconnect power to the motor and the equipment it is connected to before performing any installation, wiring, or maintenance.
- Qualified Personnel: Installation and wiring should only be performed by qualified and licensed electricians or technicians.
- Proper Grounding: Ensure the motor is properly grounded according to local and national electrical codes.
- Ventilation: Ensure adequate ventilation around the motor to prevent overheating.
- Environmental Conditions: Do not operate the motor in environments exceeding its specified temperature or humidity ratings. Avoid exposure to flammable gases or vapors.
- Moving Parts: Keep hands, tools, and clothing clear of moving parts during operation.
- Overload Protection: Install appropriate overload protection devices as required by electrical codes and application specifications.
3. Installation Guide
Proper installation is crucial for the safe and efficient operation of the Fasco D123 motor. Consult a qualified professional if you are unsure about any step.
3.1 Mounting
- Select Location: Choose a mounting location that provides stable support, adequate ventilation, and protection from environmental hazards.
- Secure Mounting: Mount the motor securely using appropriate fasteners. Ensure the motor is level and aligned with the driven component to prevent undue stress on the shaft and bearings.
- Shaft Connection: Connect the motor shaft to the driven load (e.g., fan blade) carefully. Ensure the connection is tight and balanced to avoid vibration.
3.2 Electrical Connection
- Verify Power: Ensure the power supply matches the motor's voltage (115 Volts) and frequency requirements.
- Wiring Diagram: Refer to the wiring diagram provided with your specific application or equipment. Connect the motor leads to the power supply according to the diagram.
- Grounding: Connect the motor's ground wire to a reliable earth ground.
- Insulation: Ensure all electrical connections are properly insulated to prevent short circuits.
- Rotation Check: After initial wiring, briefly apply power to verify the motor's rotation (CCWSE). If the rotation is incorrect, consult a qualified technician.
4. Operation
Once installed and wired correctly, the Fasco D123 motor is ready for operation. Follow these guidelines for safe and effective use.
- Initial Start-up: Before the first start-up, double-check all connections and ensure no obstructions are present around the motor or its driven load.
- Monitoring: During operation, periodically monitor the motor for unusual noises, excessive vibration, or overheating.
- Load Conditions: Do not operate the motor beyond its rated load or in conditions that could cause it to stall.
- Shut Down: To turn off the motor, disconnect the power supply.
5. Maintenance
Regular maintenance helps ensure the longevity and optimal performance of your Fasco D123 motor. Always disconnect power before performing any maintenance.
- Cleaning: Keep the motor exterior clean and free from dust, dirt, and debris. A build-up can impede cooling and lead to overheating. Use a soft brush or compressed air.
- Inspection: Periodically inspect the motor for any signs of wear, damage, or loose connections. Check the shaft for any obstructions or signs of corrosion.
- Bearings: This motor uses sleeve bearings. While generally maintenance-free, ensure the motor is not subjected to excessive side loads or misalignment, which can accelerate wear.
- Ventilation: Ensure that air inlets and outlets are clear and unobstructed to maintain proper airflow for cooling.
6. Troubleshooting
This section provides solutions to common issues you might encounter with your Fasco D123 motor. For complex problems, consult a qualified technician.
| Problem | Possible Cause | Solution |
|---|---|---|
| Motor does not start | No power supply Incorrect wiring Motor overload Seized bearings | Check power source and circuit breaker Verify wiring against diagram Reduce load or check for obstructions Inspect and replace if necessary |
| Motor overheats | Insufficient ventilation Excessive load High ambient temperature Bearing issues | Clear obstructions, ensure proper airflow Reduce load Ensure operating within temperature limits Inspect bearings |
| Excessive noise or vibration | Loose mounting Unbalanced load (e.g., fan blade) Worn bearings Foreign object in motor | Tighten mounting bolts Balance or replace load Inspect and replace bearings Inspect motor interior (with power off) |
| Motor runs slowly | Low voltage Excessive load Partial winding failure | Check power supply voltage Reduce load Consult a qualified technician |
7. Technical Specifications
| Specification | Value |
|---|---|
| Brand | Fasco |
| Model Name | D123 |
| Speed | 1500 RPM |
| Voltage | 115 Volts |
| Horsepower | 0.17 Horsepower (1/80 HP) |
| Material | Copper |
| Item Weight | 0.16 ounces (Motor only, package weight 0.01 Pounds) |
| Part Number | D123 |
| UPC | 745654215225 |
| Package Dimensions | 8.3 x 3.9 x 3.7 inches |
| Rotation | CCWSE (Counter-Clockwise Shaft End) |
| Bearings | Sleeve Bearing |
| Enclosure Type | Totally Enclosed |
8. Warranty and Support
As per the product specifications, this Fasco D123 motor is sold with No Warranty. Users are advised to verify product condition upon receipt.
For technical assistance or inquiries regarding the Fasco D123 motor, please contact Fasco customer support or your authorized Fasco dealer. Always provide the model number (D123) when seeking support.
You can typically find contact information for Fasco on their official website or through the retailer where the product was purchased.