DEVAISE ABGY503BL
DEVAISE Ergonomic Office Chair ABGY503BL User Manual
Model: ABGY503BL
Introduction
Thank you for choosing the DEVAISE Ergonomic Office Chair. This manual provides detailed instructions for assembly, operation, maintenance, and troubleshooting to ensure you get the most out of your chair. Please read this manual thoroughly before use and retain it for future reference.
Safety Information
Read the assembly and usage instructions carefully before assembling and using the chair. Do not exceed the maximum load capacity of 136 kg. Exercise caution when adjusting moving parts to prevent injuries. Keep these instructions handy for future reference.

A full view of the DEVAISE ergonomic office chair, showcasing its black mesh design and chrome base with wheels.
Setup and Assembly
The DEVAISE Ergonomic Office Chair is designed for straightforward assembly. Detailed assembly instructions are included in the product packaging. Please follow these instructions step-by-step. Assembly typically takes approximately 20 minutes.
General Assembly Tips:
- Ensure all components are present before starting assembly.
- Use the provided tools (e.g., Allen wrench) for assembly.
- Do not overtighten screws during initial assembly; tighten them fully once all parts are aligned.
- Assemble the chair on a soft, clean surface to prevent scratches.

This image displays the various parts of the chair as they would appear before assembly, providing a visual guide to the components.
Operating Instructions and Adjustments
The DEVAISE Ergonomic Office Chair offers multiple adjustment options to customize your seating experience for optimal comfort and support.
1. Adjusting Seat Height
To adjust the seat height, locate the lever under the right side of the seat. Pull the lever upwards while seated to lower the seat, or pull it upwards while standing to raise the seat. Release the lever at the desired height. The seat height is continuously adjustable from 48 to 57 cm.
2. Adjusting 3D Headrest
The 3D headrest provides precise neck support. It can be adjusted in three ways:
- Height Adjustment: Pull the headrest up or push it down to adjust its vertical position (up to 5 cm).
- Depth Adjustment: Push the headrest forward or pull it backward to adjust its horizontal position (up to 3.5 cm).
- Rotation: Rotate the headrest up to 55 degrees to find the most comfortable angle for your neck.
The 3D headrest can be adjusted forward and backward by 3cm, up and down by 5cm, and rotated up to 55 degrees for personalized neck support.
3. Adjusting Lumbar Support
The chair features an adjustable lumbar support to provide targeted comfort to your lower back. Rotate the knob located on the backrest to adjust the depth of the lumbar support (up to 3.5 cm), pushing it forward or retracting it to match your spinal curve.
The lumbar support can be adjusted by rotating a knob on the backrest, allowing it to move forward by 3cm to provide targeted support to the lower back.
4. Reclining Function and Rocking Tension
The segmented backrest allows for recline from 90° (upright working position) to 125° (relaxed position). To recline, pull the lever located under the left side of the seat outwards. To lock the backrest in an upright position, push the lever inwards. The rocking tension can be adjusted by rotating the round knob located under the seat, allowing you to control the resistance of the recline.
The chair features a recline function from 90° to 125°. The tension of the rocking mechanism can be adjusted, and the backrest can be locked at a desired angle using the lever.
5. Using Flip-up Armrests
The armrests can be flipped up by 90 degrees. This feature allows you to push the chair closer to your desk, saving space, or to accommodate different desk heights. Simply lift the armrests upwards until they lock into the vertical position. To lower them, gently pull them down.
The armrests can be flipped up by 90 degrees, allowing the chair to be pushed closer to a desk or stored compactly when not in use.
Maintenance
To ensure the longevity and appearance of your DEVAISE Ergonomic Office Chair, follow these simple maintenance guidelines:
- Cleaning: Wipe the chair surfaces with a damp cloth. For stubborn stains on the mesh or foam, use a mild soap solution and a soft brush, then wipe clean with a damp cloth and dry thoroughly. Avoid harsh chemicals or abrasive cleaners.
- Inspection: Periodically check all screws and bolts to ensure they are tight. Retighten if necessary.
- Moving Parts: Ensure the wheels and gas lift operate smoothly. Clean any debris from the wheels if they become stiff.
Troubleshooting
If you encounter any issues with your DEVAISE Ergonomic Office Chair, refer to the following common problems and solutions:
- Chair does not adjust height: Check if the gas lift lever is fully engaged. Ensure no obstructions are preventing the gas lift from functioning. If the gas lift is faulty, it may need replacement.
- Chair feels unstable/wobbly: Verify that all assembly screws are securely tightened, especially those connecting the base to the seat and the backrest. Ensure the wheels are properly inserted into the base.
- Wheels do not roll smoothly: Check for hair, dust, or debris caught in the wheels. Clean the wheels thoroughly. Ensure the chair is used on an appropriate surface.
- Backrest does not recline or lock: Check the recline tension knob and the recline lock lever. Ensure they are in the correct positions for the desired function.
- Seat feels hard: While the seat is designed with high-density foam for support, initial firmness is normal. Continued use typically softens the cushion slightly.
If the problem persists after attempting these solutions, please contact customer support for further assistance.
Specifications
| Feature | Detail |
|---|---|
| Brand | DEVAISE |
| Model Number | ABGY503BL |
| Color | Black |
| Material | Metal, Foam, Mesh Fabric |
| Product Dimensions (D x W x H) | 63P x 67l x 127H cm (Overall) |
| Seat Dimensions (L x D) | 51 cm x 44 cm |
| Seat Height | Adjustable from 48 cm to 57 cm |
| Backrest Height | 56 cm (internal) |
| Backrest Style | Segmented Breathable Mesh |
| Armrest Style | Flip-up (90°) |
| Headrest | 3D Adjustable (Height, Depth, Rotation) |
| Lumbar Support | Adjustable Depth |
| Recline Angle | 90° to 125° |
| Gas Lift | SGS Class 3, TÜV Certified |
| Base | Reinforced Metal with Swivel Wheels |
| Maximum Recommended Weight | 136 Kilograms |
| Item Weight | 12.08 Kilograms |
| Assembly Required | Yes |
| Usage Environment | Indoor |
This image illustrates the key dimensions of the chair, including overall height (118-132cm), backrest width (50cm), seat width (51cm), seat depth (54cm), and total depth (70cm), with a maximum weight capacity of 136 kg.
Warranty and Customer Support
DEVAISE is committed to providing reliable products and excellent customer service. For any questions regarding your chair, including warranty information, assembly assistance, or troubleshooting not covered in this manual, please do not hesitate to contact our customer support team.
Our team is available 24/7 to assist you and ensure a worry-free purchase experience. Please refer to your purchase documentation or the DEVAISE official website for specific contact details.
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