1. Introduction
This manual provides essential information for the safe installation, operation, and maintenance of your Leeson 1/2HP 850RPM TEFC General Purpose Electric Motor, model C6T8FB11C. Please read this manual thoroughly before installation or operation to ensure proper use and to prevent injury or damage.
2. Safety Information
WARNING: ELECTRIC SHOCK HAZARD. Always disconnect power before servicing or installing the motor.
Observe all local and national electrical codes. Failure to do so may result in serious injury or death.
- Ensure proper grounding to prevent electrical shock.
- Do not operate the motor in wet conditions or in the presence of flammable gases or liquids.
- Wear appropriate personal protective equipment (PPE) such as safety glasses and gloves.
- Keep hands and clothing clear of moving parts.
- Only qualified personnel should perform installation and maintenance.
3. Product Overview
The Leeson C6T8FB11C is a 1/2 horsepower, 850 RPM, Totally Enclosed Fan Cooled (TEFC) general purpose electric motor designed for various industrial and commercial applications. It operates on 208-230/460V, 3-phase, 60Hz power supply.
Figure 1: Front view of the Leeson C6T8FB11C electric motor, showing the main body, shaft, and electrical connection box.
Figure 2: Side view of the Leeson C6T8FB11C electric motor, highlighting the nameplate with electrical specifications and the "Energy Saving Electric Motors" label.
Figure 3: Technical drawing (outline) of the Leeson C6T8FB11C electric motor, providing detailed dimensions and specifications for installation planning.
Figure 4: Rear view of the Leeson C6T8FB11C electric motor, showing the fan cover for cooling.
4. Setup and Installation
Proper installation is crucial for the motor's performance and longevity. Refer to the technical drawing (Figure 3) for mounting dimensions.
4.1 Mounting
- Mount the motor on a rigid, level surface capable of supporting its weight and resisting vibration.
- Ensure adequate ventilation around the motor, especially for the fan-cooled end, to prevent overheating.
- Secure the motor using appropriate bolts and washers through the mounting feet.
4.2 Electrical Connection
CAUTION: All wiring must be performed by a qualified electrician in accordance with local and national electrical codes.
- Verify the power supply voltage (208-230V or 460V, 3-phase, 60Hz) matches the motor's requirements as indicated on the nameplate.
- Connect the motor to a dedicated circuit with appropriate overcurrent protection.
- Ensure proper grounding of the motor frame.
- Refer to the wiring diagram on the motor's nameplate or inside the terminal box for correct connections.
5. Operating Instructions
Before initial startup, perform the following checks:
- Confirm all electrical connections are secure and correct.
- Ensure the motor is properly mounted and aligned with the driven equipment.
- Check for any obstructions around the motor or fan.
5.1 Startup
Once all checks are complete, apply power to the motor. Observe the motor during the first few minutes of operation for unusual noises, vibrations, or excessive heat. If any anomalies are detected, immediately shut down the motor and investigate the cause.
5.2 Normal Operation
The motor is designed for continuous duty within its specified ratings. Monitor the motor periodically for signs of wear or malfunction.
6. Maintenance
WARNING: Disconnect all power to the motor before performing any maintenance.
6.1 Routine Inspection
- Monthly: Check for excessive vibration, unusual noise, and proper ventilation. Clean any dust or debris from the motor's exterior and fan cover.
- Quarterly: Inspect electrical connections for tightness and signs of corrosion. Check mounting bolts for tightness.
6.2 Lubrication
This motor features sealed bearings that are permanently lubricated and generally do not require additional lubrication under normal operating conditions. Refer to the motor's nameplate or manufacturer's specifications for specific lubrication requirements if applicable.
7. Troubleshooting
This section provides guidance for common issues. For complex problems, contact a qualified service technician.
| Problem | Possible Cause | Solution |
|---|---|---|
| Motor does not start | No power supply; Incorrect wiring; Overload protection tripped; Seized bearings. | Check power source and circuit breaker; Verify wiring against diagram; Reset overload; Inspect bearings. |
| Motor runs hot | Overload; Insufficient ventilation; Incorrect voltage; Bearing issues. | Reduce load; Clear obstructions from fan/motor; Verify voltage; Inspect/replace bearings. |
| Excessive noise or vibration | Loose mounting; Misalignment; Worn bearings; Unbalanced load. | Tighten mounting bolts; Check alignment; Inspect/replace bearings; Balance load. |
8. Specifications
| Parameter | Value |
|---|---|
| Brand | Leeson |
| Model | C6T8FB11C |
| Horsepower | 0.5 HP (1/2 HP) |
| Speed | 850 RPM |
| Voltage | 208-230/460 Volts |
| Phase | 3 Phase (3PH) |
| Frequency | 60 Hz |
| Enclosure Type | TEFC (Totally Enclosed Fan Cooled) |
| Service Factor | 1.15 SF |
| Frame Size | 56 |
| Mounting | Rigid Base |
| Item Weight | 31 Pounds |
| Package Dimensions | 18 x 12 x 12 inches |
9. Warranty and Support
For warranty information and technical support, please contact Leeson customer service or visit their official website. Keep your purchase receipt as proof of purchase.
Leeson Contact Information: www.leeson.com (Example link, actual link may vary)
