Yaheetech Ergonomic Office Chair 614285 Instruction Manual

1. Introduction

Thank you for choosing the Yaheetech Ergonomic Office Chair. This manual provides essential information for the safe assembly, operation, and maintenance of your new chair. Please read it thoroughly before use and retain it for future reference.

Image 1: Yaheetech Ergonomic Office Chair in a modern office environment.

2. Safety Information

This office chair meets the requirements of EN1335 standard and has been tested according to BIFMA standards. It supports up to 136 kg (300 lbs). Please follow the assembly instructions carefully and use the chair within the recommended weight limits to prevent tipping or damage. Ensure all screws are tightened securely before use and periodically check for loose connections.

3. Product Features

• Superior Stability and Comfort: Features a large 70 cm (27.5 inch) diameter base for high stability. The spacious seat (52 × 53 cm / 20.5 × 20.9 inches) is padded with 11.5 cm (4.5 inches) dense foam for soft comfort during long working hours.
• Cozy Tilt Mechanism: Recline for optimal rest with a lockable and adjustable backrest from 90° to 130°.
• Multi-Adjustable Lumbar Support: Designed with a lumbar support adjustable in depth up to 3 cm (1.2 inches) and in height up to 7 cm (2.8 inches) to promote correct sitting posture.
• Ergonomic Design: Adjustable headrest up to 120° and height adjustable up to 8 cm (3.1 inches) for flexible head and neck support. The seat is made of FSC-certified wood panel.
• Proven Safety and Durability: Key components (armrests, seat, support, gas lift) tested to BIFMA standards. The gas lift successfully passed 100,000 impact resistance cycles and 120,000 rotation cycles (SGS report no. SDHL241202405001FT), supporting up to 136 kg (300 lbs).

Image 2: Detailed dimensions of the Yaheetech Ergonomic Office Chair.

Image 3: Overview of the chair's adjustable features including armrests, seat height, mobility, and tilt function.

4. Setup and Assembly

For detailed step-by-step assembly instructions, please refer to the video below. Ensure all parts are present before beginning assembly. Use the provided tools and tighten all screws securely.

5. Operating Instructions

5.1. Seat Height Adjustment

To adjust the seat height, pull the lever located under the seat upwards while applying slight pressure to the seat (to lower) or lifting your weight off the seat (to raise). Release the lever to lock the height.

5.2. Backrest Tilt and Lock

The backrest can be tilted between 90° and 130°. Pull the lever on the side of the chair outwards to unlock the tilt function. Lean back to your desired angle, then push the lever inwards to lock the backrest in place. To return to the upright position, unlock the tilt and lean forward.

Image 4: Illustration of the chair's tilt and locking mechanism, showing the range of recline from 90° to 130°.

5.3. Lumbar Support Adjustment

Adjust the lumbar support by using the knobs or levers on the backrest. It can be adjusted in depth up to 3 cm and in height up to 7 cm to provide optimal support for your lower back.

Image 5: Close-up of the adjustable lumbar support, highlighting its height and depth adjustment capabilities for personalized comfort.

5.4. Headrest Adjustment

The headrest can be adjusted in height up to 8 cm and its angle can be tilted up to 120° for flexible neck and head support. Adjust it to a position that comfortably supports your head and neck.

5.5. Armrest Adjustment

The armrests are height adjustable up to 7 cm. Press the button on the side of the armrest and slide it up or down to your preferred height. Release the button to lock.

5.6. Swivel Function

The chair features 360° swivel casters for smooth and quiet movement across various floor types.

6. Maintenance

To maintain your chair, simply wipe it clean with a damp cloth. Avoid using harsh chemicals or abrasive cleaners. Regularly check all screws and bolts to ensure they are tight. If any parts are damaged or worn, contact customer support for replacement.

7. Troubleshooting

• Chair is wobbly: Ensure all screws and bolts are securely tightened. Check that the gas lift is properly inserted into the base.
• Gas lift not working: Ensure the height adjustment lever is fully engaged. If the issue persists, the gas lift may need replacement.
• Casters not rolling smoothly: Check for any debris (hair, dust) caught in the casters and clean them.

8. Specifications

9. Warranty and Support

This product is manufactured to high-quality standards and is designed for durability. For any questions, concerns, or support needs, please contact Yaheetech customer service. Please refer to your purchase documentation for specific warranty details.