Important Safety Instructions
When using an electrical appliance, basic precautions should always be observed, including the following:
- Read all instructions before using this vacuum cleaner.
- Always turn off the appliance before connecting or disconnecting the motorized nozzle, wand, battery pack, or charger.
- Do not handle plug or appliance with wet hands.
- Use only as described in this manual.
- Do not use for wet pick-up.
- Keep hair, loose clothing, fingers, and all parts of body away from openings and moving parts.
- Do not use without dust cup and filters in place.
- Do not pick up large objects, hard or sharp objects, or anything that is burning or smoking.
- Do not allow children to operate the vacuum or play with it. Close supervision is necessary when used near children.
- Use only Shark-recommended accessories and replacement parts.
1. Setup Guide
1.1 Assembly
Assemble your Shark Clean Cordless Stick Vacuum by connecting the main components. Ensure each part clicks securely into place.
- Insert the wand into the motorized floor nozzle until it clicks.
- Insert the handheld vacuum into the top of the wand until it clicks.
- Place the assembled vacuum onto the Auto-Empty Dock.
Image: The complete Shark Clean Cordless Stick Vacuum with its Auto-Empty Dock and included accessories, illustrating the assembled unit.
1.2 Initial Charging
Before first use, fully charge the vacuum. The Auto-Empty Dock automatically charges the vacuum when it is docked.
- Place the vacuum onto the Auto-Empty Dock.
- Ensure the dock is plugged into a power outlet.
- The battery indicator lights on the handheld vacuum will illuminate to show charging status.
- A full charge provides up to 40 minutes of runtime in ECO mode.
Image: The Shark Cordless Vacuum is shown docked on its Auto-Empty System, indicating it is always charged and ready for use, offering up to 40 minutes of runtime.
2. Operating Instructions
2.1 Power and Mode Selection
Press the power button to turn the vacuum on or off. Use the mode selection button to switch between cleaning modes:
- ECO Mode: For everyday cleaning and extended runtime.
- Boost Mode: For increased suction power on tough messes.
- Quiet Mode: For quieter operation, allowing you to charge silently and empty later.
2.2 Using the Handheld Vacuum
The handheld vacuum detaches for convenient above-floor cleaning.
- Press the release button on the handheld unit to detach it from the wand.
- Attach desired accessories directly to the handheld unit.
- Use for cleaning upholstery, car interiors, or tight spaces.
Image: A hand detaches the lightweight handheld vacuum from the main unit, demonstrating its versatility for above-floor cleaning tasks.
2.3 Multi-Surface Cleaning with PowerFins™
The PowerFins™ brushroll automatically adjusts its speed to optimize cleaning performance across different floor types, from deep cleaning carpets to direct engagement on hard floors.
Image: The vacuum's PowerFins™ brushroll is shown cleaning both a carpeted area and a hard floor, illustrating its multi-surface cleaning capability and automatic brushroll speed adjustment.
Image: The vacuum's HyperVelocity Accelerated Suction Power is depicted, showing its strong cleaning performance on both carpets and hard floors, effectively picking up debris.
2.4 Using Attachments
Utilize the included attachments for specialized cleaning tasks.
- Duster Crevice Tool: Ideal for cleaning hard-to-reach areas, corners, and tight spaces.
- Multi-Tool for Pets: Designed for picking up pet hair and dander from various surfaces.
Image: A hand uses the Duster Crevice Tool to clean dust from a shelf, highlighting its effectiveness for reaching and cleaning tight or elevated areas.
2.5 LED Headlights
The powerful LED headlights on the nozzle illuminate hidden debris, making it easier to spot and clean dirt in dimly lit areas.
3. Maintenance
3.1 Auto-Empty System
The Auto-Empty System automatically empties the vacuum's dust cup into the dock's larger capacity bin, providing up to 30 days of hands-free emptying.
- When the vacuum is docked, it will automatically empty its contents.
- The dock seals fine dust and debris, reducing dust exposure by up to 500 times compared to manual emptying.
- The Anti-Allergen Complete Seal and HEPA filtration system capture over 99.97% of dust and allergens.
Image: The Auto-Empty System is shown in operation, automatically transferring debris from the vacuum into the dock, eliminating the need for daily manual emptying and preventing dust clouds.
Image: A comparison showing significantly reduced dust exposure when using the auto-empty system versus traditional manual emptying, highlighting the sealed dust collection.
Image: An illustration of the Auto-Empty Dock's Anti-Allergen Complete Seal, demonstrating how it locks away over 99.97% of dust and allergens, ensuring cleaner air.
3.2 Brushroll Maintenance
The self-cleaning brushroll is designed to prevent hair wrap. Periodically check the brushroll for any debris or blockages.
- To access the brushroll, press the release button on the side of the floor nozzle.
- Remove any tangled hair or debris with scissors if necessary.
- Ensure the brushroll is clear before reattaching the cover.
Image: A close-up comparison of a traditional brushroll with hair tangled around it versus the Shark self-cleaning brushroll, which remains free of hair wrap.
3.3 Filter Cleaning
Regularly clean the filters to maintain optimal suction power.
- Remove the pre-motor filters (foam and felt) from the handheld vacuum.
- Tap loose dirt off filters between washes.
- Rinse filters with cold water only. Allow to air dry completely for at least 24 hours before reinstalling.
- The HEPA post-motor filter should be cleaned annually. Refer to the full manual for detailed instructions.
4. Troubleshooting
If your vacuum is not performing as expected, consult the following common issues:
| Problem | Possible Cause | Solution |
|---|---|---|
| Vacuum not picking up debris or has low suction. | Clogged filter, blocked nozzle/wand, full dust cup. | Check and clean filters. Clear any blockages from the nozzle or wand. Empty the dust cup or auto-empty bin. |
| Brushroll not spinning. | Obstruction in brushroll, brushroll cover not properly closed. | Remove any obstructions from the brushroll. Ensure the brushroll cover is securely latched. |
| Vacuum turns off on its own. | Overheating, low battery. | Allow vacuum to cool down for at least 45 minutes. Recharge the battery. |
For further assistance, please refer to the full product manual or contact Shark customer support.
5. Specifications
| Feature | Detail |
|---|---|
| Brand | Shark |
| Model Name | Shark® Clean & Empty Cordless Stick Vacuum & Auto-Empty System |
| Model Number | BU3521C |
| Special Feature | Cordless |
| Voltage | 22 Volts |
| Item Weight | 11.24 Pounds (approx. 5.1 kg) |
| Capacity | 1.3 Liters (Auto-Empty Dock) |
| Color | Rotator White + Bold Magenta |
| Portable | Yes (Handheld unit) |
| Electric Power | 890 Watts |
| Dimensions (LxWxH) | 37.3L x 26.5W x 110.5H cm |
| Battery Type | Lithium Ion |
| Run Time | Up to 40 Minutes (in ECO mode) |
| Control Method | Touch |
| UPC | 622356647472 |
6. Warranty & Support
6.1 Product Warranty
This Shark product comes with a limited warranty. Please refer to the warranty card included in your product packaging for specific terms and conditions, including warranty duration and coverage details.
6.2 Customer Support
For technical assistance, replacement parts, or warranty inquiries, please contact Shark Customer Service. Contact information can typically be found on the Shark website or in your product documentation.
Online Support: Visit the official Shark website for FAQs, troubleshooting guides, and product registration.
Telephone Support: Refer to your product manual for the customer service phone number in your region.