1. Introduction
Thank you for choosing the Yaheetech Ergonomic Adjustable Office Chair. This manual provides essential information for the safe assembly, operation, and maintenance of your new office chair. Please read these instructions thoroughly before use and retain them for future reference.
This chair is designed to provide comfort and support for various settings, including offices, homes, and study areas, featuring an ergonomic backrest, padded seat, adjustable height, and 360-degree swivel wheels.
2. Safety Information
[SAFETY NOTICE: The chair has a maximum weight capacity of 123 kg. Ensure all assembly and operating instructions are read to guarantee safe use.]
- Always assemble the chair on a soft, clean surface to prevent damage.
- Ensure all screws and bolts are securely tightened before using the chair.
- Do not stand on the chair or use it as a step stool.
- Avoid exposing the chair to direct sunlight or extreme temperatures to prevent material degradation.
- Keep children away from the chair during assembly. Small parts may pose a choking hazard.
- Do not exceed the maximum weight capacity of 123 kg.
3. Package Contents
Please verify that all components are present before beginning assembly. Refer to the packaging for a complete list of components and hardware. Typically, the package includes:
- Backrest
- Seat cushion
- Armrests (2)
- Gas lift cylinder
- Star base
- Casters (5)
- Mounting hardware (screws, washers, Allen wrench)
4. Assembly Instructions
Follow these steps carefully for proper assembly. It is recommended to have a second person assist with certain steps.
- Attach Casters to Base: Insert each of the five casters into the holes at the end of each leg of the star base. Push firmly until they click into place.
Description: A close-up image of the chair's five-star base with black swivel casters attached, illustrating their 360-degree rotation capability.
- Insert Gas Lift: Place the gas lift cylinder into the center hole of the assembled star base. Do not sit on it yet.
- Attach Armrests to Seat: Align the armrests with the pre-drilled holes on the underside of the seat cushion. Secure them using the provided screws and Allen wrench. Do not overtighten.
Description: A detailed view of the chair's black faux leather padded seat and one armrest, showing the texture and cushioning.
- Attach Backrest to Seat: Connect the backrest to the seat cushion using the remaining screws. Ensure the ergonomic curve of the backrest is facing the correct direction.
Description: A side view of the chair's backrest with a translucent, colorful spine graphic overlaid, demonstrating the ergonomic design for lumbar support.
- Connect Seat Assembly to Gas Lift: Carefully place the assembled seat and backrest onto the gas lift cylinder, ensuring it is centered. Apply gentle downward pressure to secure it.
- Final Check: Verify that all connections are secure and the chair is stable before use.
5. Operating Instructions
- Height Adjustment: To adjust the seat height, lift the lever located under the right side of the seat.
- To raise the seat: Lift the lever while taking your weight off the seat. The seat will rise automatically.
- To lower the seat: Lift the lever while remaining seated. The seat will lower under your weight.
Description: A detailed image showing the black lever under the chair's seat, used for adjusting the height, with blue arrows illustrating the vertical adjustment range.
- Swivel Function: The chair is equipped with a 360-degree swivel mechanism, allowing for easy rotation without moving the base.
- Caster Movement: The five casters allow for smooth movement across various floor surfaces.
6. Maintenance
- Cleaning: Wipe the faux leather surfaces with a soft, damp cloth. For stubborn stains, use a mild soap solution and dry immediately. Avoid harsh chemicals or abrasive cleaners.
- Inspection: Periodically check all screws and bolts to ensure they remain tight. Retighten if necessary.
- Casters: Keep casters free of hair and debris to ensure smooth rolling.
- Gas Lift: Do not attempt to disassemble the gas lift cylinder.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Chair does not adjust height. | Gas lift malfunction or lever not engaged. | Ensure the lever is fully pulled. If the issue persists, the gas lift may need replacement. Contact customer support. |
| Chair is wobbly. | Loose screws or improper assembly. | Check and tighten all assembly screws. Re-assemble if necessary, ensuring all parts are correctly aligned. |
| Casters do not roll smoothly. | Debris caught in casters. | Remove any hair, dust, or debris from the caster wheels. |
| Squeaking noises. | Loose connections or friction between parts. | Tighten all screws. Apply a small amount of silicone lubricant to moving parts if necessary, avoiding the gas lift. |
8. Specifications
Description: A graphic illustrating the key dimensions of the chair (height, width, depth) and a table listing material, total dimensions, seat height, and weight capacity.
| Feature | Detail |
|---|---|
| Brand | Yaheetech |
| Model Number | YA-00106713 |
| Color | Black |
| Material | PP, Artificial Leather (Faux Leather) |
| Total Dimensions (W x D x H) | 58 x 57.5 x (87-97) cm |
| Seat Height Adjustment Range | 42-52 cm |
| Product Weight | 9.7 kg |
| Maximum Weight Capacity | 123 kg |
| Special Features | Adjustable Height, Ergonomic Backrest, Lumbar Support, Padded Seat, Swivel, Casters |
| Certifications | EN1335, SGS, BIFMA (Gas Lift) |
9. Warranty and Support
Yaheetech products are designed for quality and durability. For warranty information, product support, or to purchase replacement parts, please visit the official Yaheetech website or contact their customer service department.
You can find more information and contact details on the Yaheetech Brand Store.
