Yaheetech Ergonomic Mid-Back Mesh Office Chair YT-0009497001 Instruction Manual

1. Introduction

This manual provides detailed instructions for the assembly, operation, and maintenance of your Yaheetech Ergonomic Mid-Back Mesh Office Chair. Please read this manual thoroughly before assembly and use to ensure proper function and safety.

Image 1: Yaheetech Ergonomic Mid-Back Mesh Office Chair (Grey)

2. Safety Information

For your safety, please observe the following:

• Do not stand on this chair.
• The maximum recommended weight capacity is 300 pounds.
• This chair is recommended for users under 200 pounds for optimal comfort and longevity.

3. Components List

Before beginning assembly, ensure all parts are present and undamaged. Refer to the diagram below for identification.

Image 2: Exploded view of chair components and assembly steps.

• Chair Base (Star Base)
• Casters (5 pieces)
• Gas Lift Cylinder
• Seat Cushion
• Backrest (Mesh)
• Armrests (2 pieces)
• Mechanism Plate
• Screws and Allen Wrench (Included)

4. Setup and Assembly

Assembly is required. Follow these steps carefully. An assembly video is also provided for visual guidance.

1. Attach Casters to Base: Insert the five casters into the holes at the end of each leg of the star base. Push firmly until they click into place.
2. Install Gas Lift: Place the gas lift cylinder into the center hole of the star base.
3. Attach Armrests to Backrest: Secure the armrests to the backrest using the provided screws. Do not fully tighten the screws until all components are aligned.
4. Attach Mechanism Plate to Seat: Align the mechanism plate with the screw holes on the underside of the seat cushion. Ensure the front of the mechanism faces the front of the seat. Secure with screws. Do not fully tighten.
5. Connect Backrest/Armrest Assembly to Seat: Attach the backrest and armrest assembly to the seat cushion, aligning the holes. Secure with screws. Once all screws are in place for the backrest, armrests, and mechanism, tighten them completely.
6. Assemble Seat to Gas Lift: Place the assembled seat onto the gas lift cylinder, ensuring it is centered and stable.

Assembly Video

Video 1: Step-by-step assembly guide for the Yaheetech Office Chair.

5. Operating Instructions

Your Yaheetech office chair offers several adjustable features for personalized comfort.

Adjustable Height

To adjust the seat height, locate the lever on the right side beneath the seat. While seated, pull the lever up to lower the seat. To raise the seat, stand up and pull the lever up. Release the lever to lock the height in place.

Image 3: Adjustable seat height and rocking motion features.

Reclining Function and Tilt Tension

The chair features a reclining function allowing you to lean backward for relaxation. Push the lever (same as height adjustment) inwards to enable rocking, or pull it outwards to lock the chair in an upright position. A tilt tension control knob located under the seat allows you to adjust the resistance of the recline. Turn clockwise to increase tension, counter-clockwise to decrease tension.

360-Degree Swivel and Rolling Casters

The chair is equipped with a 360-degree swivel function and five smooth-rolling casters for easy movement and maneuverability around your workspace.

Lumbar Support and Breathable Mesh

The mid-back design includes fixed lumbar support to promote proper posture and support the natural curve of your spine. The breathable mesh backrest enhances airflow, reducing heat and moisture buildup during extended use.

Image 4: Detail of breathable mesh and integrated lumbar support.

Operating Features Video

Video 2: Demonstration of chair features including rocking motion and height adjustment.

6. Maintenance

To maintain the condition and longevity of your office chair, follow these simple care instructions:

• Cleaning: Wipe clean with a damp cloth. Avoid harsh chemicals or abrasive cleaners.
• Inspection: Periodically check all screws and connections to ensure they are tight. Retighten if necessary.
• Casters: Keep casters free of debris (hair, dust, etc.) to ensure smooth rolling.

7. Troubleshooting

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

• Chair not adjusting height: Ensure the gas lift lever is fully engaged when attempting to adjust. Check for any obstructions around the gas lift cylinder.
• Chair wobbles: Verify that all assembly screws are securely tightened. Ensure the chair is on a flat, even surface.
• Casters not rolling smoothly: Inspect casters for trapped debris (hair, lint) and clean as needed.
• Backrest not reclining: Check the tilt tension knob under the seat. Turn it counter-clockwise to loosen the tension. Ensure the recline lock lever is disengaged.

If problems persist, please contact customer support.

8. Specifications

9. Warranty and Support

For warranty information or further assistance, please refer to the product packaging or contact Yaheetech customer service directly. Keep your purchase receipt for any warranty claims.