Introduction
This manual provides essential information for the safe and efficient installation, operation, and maintenance of your Mars 10891 IP67 Evaporator/Condenser Fan Motor. Please read this manual thoroughly before using the product and retain it for future reference.
Safety Information
Always observe the following safety precautions to prevent injury or damage to the product.
- Electrical Safety: Ensure power is disconnected before installation, maintenance, or troubleshooting. All electrical work should be performed by a qualified electrician in accordance with local codes and regulations.
- Proper Handling: Handle the motor with care to avoid dropping or damaging it.
- Environmental Conditions: This motor is IP67 rated, meaning it is protected against dust ingress and temporary immersion in water. However, avoid prolonged submersion or exposure to corrosive substances.
- Ventilation: Ensure adequate ventilation around the motor during operation to prevent overheating.
Product Overview
The Mars 10891 is a robust 4-25 watt IP67 rated motor designed for evaporator and condenser fan applications. It operates at 230 Volts and has a speed of 1550 RPM, making it suitable for various industrial and automotive cooling systems.

Figure 1: Front view of the Mars 10891 motor, showing the main body and attached power cord.

Figure 2: Side view of the Mars 10891 motor, highlighting the product label and mounting points.

Figure 3: Rear view of the Mars 10891 motor, showing the back casing and additional mounting features.
Setup and Installation
Before beginning installation, ensure all power to the system is turned off and locked out. Refer to your system's specific wiring diagram for proper connections.
- Mounting: Securely mount the Mars 10891 motor using appropriate fasteners to a stable surface. Ensure the mounting orientation allows for proper airflow and vibration dampening.
- Wiring: Connect the motor's power cord to the designated electrical supply. Verify that the voltage (230 Volts) matches the motor's requirements. Ensure all connections are tight and insulated.
- Fan Blade Attachment: If replacing an existing motor, carefully attach the fan blade to the motor shaft. Ensure the blade is balanced and securely fastened to prevent vibration and damage.
- Final Check: Before restoring power, double-check all connections and mounting points. Ensure no loose wires or obstructions are present.
Operating Instructions
Once installed, the Mars 10891 motor operates automatically when power is supplied to the system it is integrated into. It is designed for continuous operation within its specified parameters.
- Power On: Restore power to the system. The motor should begin rotating at its rated speed of 1550 RPM.
- Monitoring: Observe the motor during its initial operation for any unusual noises, vibrations, or signs of overheating.
- Normal Operation: The motor is designed to run quietly and efficiently. Its IP67 rating ensures reliable performance in environments exposed to dust and moisture.
Maintenance
Regular maintenance ensures the longevity and optimal performance of your Mars 10891 motor. Always disconnect power before performing any maintenance.
- Cleaning: Periodically clean the exterior of the motor to remove dust and debris. Use a soft, damp cloth. Do not use harsh chemicals or abrasive cleaners.
- Inspection: Regularly inspect the motor for any signs of wear, damage, or loose connections. Check the fan blade for accumulation of dirt or damage that could cause imbalance.
- Lubrication: This motor is typically sealed and does not require user lubrication. Refer to the manufacturer's specifications if you suspect lubrication is needed.
Troubleshooting
If you encounter issues with your Mars 10891 motor, refer to the following common problems and solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Motor does not start | No power supply; Loose wiring; Motor fault | Check power source and circuit breaker; Verify all electrical connections; Consult a qualified technician if motor is faulty. |
| Unusual noise or vibration | Loose mounting; Damaged fan blade; Bearing wear | Tighten mounting bolts; Inspect and replace damaged fan blade; If bearings are worn, motor replacement may be necessary. |
| Motor overheating | Insufficient ventilation; Overload; Internal fault | Ensure clear airflow around motor; Verify motor is not operating beyond its rated capacity; Disconnect power and seek professional assistance. |
Specifications
| Attribute | Value |
|---|---|
| Brand | Mars |
| Model Number | 10891 |
| Type | Evaporator/Condenser Fan Motor |
| Horsepower | 25 Watts |
| Voltage | 230 Volts |
| Speed | 1550 RPM |
| IP Rating | IP67 |
| Material | Evaporator/condenser (referring to application) |
| Package Dimensions | 5.51 x 5 x 4.29 inches |
| Weight | 2.45 Pounds |
| Date First Available | November 8, 2017 |
Warranty Information
Mars products are manufactured to high-quality standards. For specific warranty terms and conditions, please refer to the documentation provided with your purchase or contact Mars customer support. Keep your proof of purchase for warranty claims.
Support
If you require further assistance or have questions not covered in this manual, please contact Mars customer support. You can typically find contact information on the manufacturer's official website or on the product packaging.
For the latest information and support resources, visit the official Mars website.





