1. Introduction
Product Overview
The Yaheetech Office Chair is designed to provide comfort and practicality for extended periods of sitting. Featuring a densely padded seat, adjustable headrest, lumbar support, and foldable armrests, it offers a customizable seating experience. The chair's height can be adjusted from 45 cm to 55 cm to suit various body types and desk heights. A rocking function allows for relaxation during breaks. Its versatile design makes it suitable for various settings, including offices, studies, conference rooms, and reception areas.
Safety Warnings
Important: Always ensure the chair is fully assembled and stable before use. Do not exceed the recommended maximum weight capacity of 136 kg (300 lbs) to prevent instability or damage to the chair. Keep small parts away from children during assembly. Avoid standing on the chair.
2. Package Contents
Please check the package carefully to ensure all components are present and undamaged. If any parts are missing or damaged, please contact customer support.
- Backrest with Headrest
- Seat Cushion with Armrests (pre-attached)
- Gas Lift Cylinder
- Gas Lift Cover
- Star Base (5-star)
- Casters (5 pieces)
- Mounting Hardware (screws, washers, Allen key)
3. Assembly Instructions (Setup)
Follow these steps carefully to assemble your Yaheetech Office Chair. It is recommended to assemble the chair on a soft, clean surface to prevent scratches.
- Attach Casters to Star Base: Insert each of the five casters into the holes at the end of the star base until they click securely into place.
Figure 3.1: The 70 cm wide star base with five smooth-rolling casters, providing stable and quiet movement.
- Insert Gas Lift: Place the gas lift cylinder into the center hole of the assembled star base. Cover the gas lift with the plastic gas lift cover.
- Attach Seat to Backrest: Align the pre-drilled holes on the seat cushion with the corresponding holes on the backrest. Secure them using the provided screws and Allen key. Ensure all screws are tightened firmly.
Figure 3.2: Overview of chair components and their adjustable features, aiding in assembly understanding.
- Connect Assembled Top to Gas Lift: Carefully place the assembled seat and backrest onto the gas lift cylinder. Press down firmly to ensure a secure connection.
- Final Check: Wiggle the chair gently to ensure all connections are secure and the chair is stable before sitting on it.
4. Operating Instructions
Your Yaheetech Office Chair offers several adjustable features for personalized comfort.
- Seat Height Adjustment: Locate the lever on the right side under the seat.
- To raise the seat: Lift the lever while taking your weight off the seat.
- To lower the seat: Lift the lever while remaining seated.
The seat height can be adjusted from 45 cm to 55 cm.
- Rocking Function: The same lever used for height adjustment also controls the rocking function.
- To enable rocking: Pull the lever outwards.
- To lock the rocking function (upright position): Push the lever inwards.
Figure 4.1: Adjustable lever for seat height and rocking function, and the tension knob.
- Tilt Tension Adjustment: A round knob located under the front of the seat controls the tension of the rocking function.
- Turn clockwise to increase tension (harder to rock).
- Turn counter-clockwise to decrease tension (easier to rock).
- Adjustable Headrest: The headrest can be adjusted vertically to provide optimal neck and head support. Gently push or pull the headrest to your desired height.
Figure 4.2: Adjustable headrest and flexible lumbar support for ergonomic comfort.
- Flexible Lumbar Support: The lumbar support is designed to flex with your back, providing continuous support. No manual adjustment is typically required for this feature.
- Foldable Armrests: The armrests can be folded up by rotating them 90 degrees upwards. This allows the chair to be pushed closer to a desk or stored more compactly.
Figure 4.3: The armrests can be folded up 90 degrees for space-saving or to allow closer access to a desk.
5. Care and Maintenance
Proper care will extend the life and appearance of your office chair.
- Cleaning: Wipe clean with a damp cloth. For stubborn stains, use a mild soap solution and wipe dry immediately. Avoid harsh chemicals or abrasive cleaners.
- Regular Checks: Periodically check all screws and connections to ensure they remain tight. Retighten if necessary.
- Caster Care: Keep casters free of hair and debris to ensure smooth rolling.
- Avoid Direct Sunlight: Prolonged exposure to direct sunlight can cause fading or damage to the material.
6. Troubleshooting Common Issues
If you encounter any issues with your chair, refer to the table below for common problems and solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Chair does not stay at desired height. | Gas lift failure or lever not fully engaged. | Ensure the height adjustment lever is fully engaged. If the problem persists, the gas lift may need replacement. Contact customer support. |
| Chair wobbles or feels unstable. | Loose screws or improper assembly. | Check and tighten all assembly screws, especially those connecting the seat to the backrest and the base. Ensure casters are fully inserted. |
| Casters do not roll smoothly. | Debris (hair, dust) caught in casters. | Turn the chair over and carefully remove any debris from the caster wheels. |
| Rocking function is too stiff or too loose. | Tilt tension knob needs adjustment. | Adjust the tilt tension knob located under the seat. Turn clockwise to increase tension, counter-clockwise to decrease. |
7. Product Specifications
| Feature | Detail |
|---|---|
| Brand | Yaheetech |
| Model Number | 592717 Black |
| Color | Black |
| Material | Plastic, Mesh, Faux Leather (for padded areas) |
| Overall Dimensions (L x W x H) | Approx. 70 cm x 70 cm x 121.5-131.5 cm (27.6" x 27.6" x 47.8"-51.8") |
| Seat Height Adjustment Range | 45 cm - 55 cm (17.7" - 21.7") |
| Product Weight | 14.95 kg (32.96 lbs) |
| Maximum Load Capacity | 136 kg (300 lbs) |
| Special Features | Rolling Casters, Ergonomic Design, Adjustable Headrest, Adjustable Lumbar Support, Foldable Armrests, Height Adjustable, Rocking Function |
Figure 7.1: Detailed dimensions of the Yaheetech Office Chair.
8. Warranty and Customer Support
Yaheetech is committed to providing high-quality products. For any questions, concerns, or warranty claims, please contact our customer support team. Please have your model number (592717 Black) and purchase information ready when contacting support.
For further assistance, please visit the official Yaheetech website or contact your retailer.
Online Support: www.yaheetech.com
