SIHOO M59AS Ergonomic Office Chair User Manual

1. Safety Information

Please read all instructions carefully before assembly and use. Retain this manual for future reference.

• Maximum Weight Capacity: This chair is designed to support a maximum weight of 150 kg (330 lbs). Do not exceed this limit.
• Assembly: Ensure all components are correctly assembled and tightened according to the instructions to prevent instability.
• Adjustments: Use adjustable mechanisms carefully. Avoid sudden movements or excessive force when adjusting chair components.
• Maintenance: Regularly check all bolts and screws to ensure they remain tight. Loose components can lead to instability and potential injury.
• Usage: Use the chair on a stable, level surface. Avoid standing on the chair or using it as a step stool.

2. Setup and Assembly

The SIHOO M59AS chair requires assembly. Detailed step-by-step instructions and all necessary tools are included in the product packaging. Please refer to the separate assembly guide for visual instructions.

General Assembly Steps:

1. Unpack all components and verify against the parts list.
2. Attach the casters to the chair base.
3. Insert the gas lift into the center of the chair base.
4. Assemble the seat mechanism to the seat cushion.
5. Attach the backrest to the seat mechanism.
6. Connect the armrests to the seat.
7. Place the assembled seat and backrest onto the gas lift.
8. Attach the headrest to the backrest.
9. Ensure all screws are securely tightened before use.

Figure 2.1: Front view of the SIHOO M59AS chair.

Figure 2.2: Side view of the SIHOO M59AS chair.

Figure 2.3: Back view of the SIHOO M59AS chair.

3. Operating Instructions

The SIHOO M59AS chair offers multiple adjustment features to customize your seating experience for optimal comfort and ergonomic support.

3.1. Seat Height Adjustment

To adjust the seat height, locate the lever under the right side of the seat. While seated, pull the lever up to lower the seat. To raise the seat, stand up slightly and pull the lever up. Release the lever at the desired height.

3.2. 3D Coordinated Armrests

The armrests are designed for multi-directional adjustment to provide optimal support. They can be adjusted in the following ways:

• Height Adjustment: Press the button on the side of each armrest and move it up or down. Release the button to lock it in place.
• Forward/Backward Adjustment: Slide the armrest pad forward or backward by 4 cm to find your preferred position.
• Left/Right Rotation: Rotate the armrest pads up to 40 degrees left or right to support various postures.

Figure 3.1: 3D Coordinated Armrest Adjustments.

Figure 3.2: Detailed diagram of 3D armrest movements.

3.3. 80° Foldable Armrests

For space-saving storage or to allow more freedom of movement (e.g., playing a guitar), the armrests can be folded upwards by 80 degrees. Simply lift the armrests until they lock into the upright position. To return them, gently pull them down.

Figure 3.3: Armrests folded upwards for space-saving.

Figure 3.4: Foldable armrests saving space under a desk.

3.4. Dual Backrest and Dynamic Lumbar Support

The chair features a dual backrest design with an adaptive lumbar pillow that automatically adjusts to your body's movement, providing continuous support.

• The two adjustable backrests conform to the curve of your spine.
• The lumbar support provides dynamic pressure distribution and micro-rotation for personalized adjustment.

Figure 3.5: Dynamic Lumbar Support in action.

Figure 3.6: Detailed view of dual backrest and dynamic lumbar support.

3.5. Headrest Adjustment

The headrest features a double articulation design for precise cervical support. It can be adjusted vertically by 8.5 cm and tilted by 22 degrees to align with your neck and head.

Figure 3.7: Headrest adjustment for cervical support.

Figure 3.8: Headrest and seat cushion features.

3.6. Saddle-shaped Seat Cushion

The wide, saddle-shaped seat cushion is designed to conform to the curves of your hips and legs, effectively relieving pressure. It features durable and breathable 'dragon mesh' for comfort during long periods of sitting.

3.7. Integrated Hanger

The chair includes a practical hanger on the backrest, allowing for easy storage of clothes or bags, keeping your workspace tidy.

Figure 3.9: Integrated hanger for clothes and bags.

Figure 3.10: Chair with jacket on hanger.

4. Maintenance

Proper maintenance ensures the longevity and optimal performance of your SIHOO M59AS office chair.

• Cleaning: For general cleaning, use a soft, damp cloth. For spot cleaning, use a mild soap solution and a soft cloth. Avoid harsh chemicals or abrasive cleaners, as these can damage the mesh fabric and plastic components.
• Inspection: Periodically inspect all bolts, screws, and connections to ensure they are tight. Re-tighten any loose fasteners to maintain stability and safety.
• Moving the Chair: When moving the chair, lift it rather than dragging it to prevent damage to the casters or floor.
• Avoid Overloading: Do not exceed the maximum weight capacity of 150 kg.

5. Troubleshooting

If you encounter any issues with your SIHOO M59AS chair, please refer to the following common solutions:

If these solutions do not resolve the issue, please contact SIHOO customer support for further assistance.

6. Specifications

Detailed technical specifications for the SIHOO M59AS Ergonomic Office Chair.

Figure 6.1: SIHOO M59AS chair from multiple perspectives.

Figure 6.2: SIHOO product certifications and awards.

Figure 6.3: Durability testing simulating 10 years of use.

7. Warranty and Support

SIHOO is committed to providing high-quality products and excellent customer service.

7.1. Warranty Information

For specific warranty details regarding your SIHOO M59AS chair, please refer to the warranty card included in your product packaging or visit the official SIHOO website. The warranty typically covers manufacturing defects and material failures under normal use.

7.2. Customer Support

If you have any questions, require assistance with assembly, or experience any issues with your chair, please do not hesitate to contact our customer support team.

Contact Methods:

• Email: service@sihoooffice.com
• Online: Visit the SIHOO store on Amazon or the official SIHOO website for support options.

Figure 7.1: How to contact SIHOO customer support.