1. Introduction
Welcome to the user manual for your new KERDOM Ergonomic Office Chair. This manual provides essential information on setting up, operating, maintaining, and troubleshooting your chair to ensure a comfortable and productive experience. Designed with an S-shaped high-back seat, adjustable headrest, 3D armrests, and lumbar support, this chair is crafted to provide optimal support for long hours of use in both home and office environments.
2. Product Overview
The KERDOM Ergonomic Office Chair combines modern design with advanced ergonomic features to enhance your comfort and well-being. Below are key visual aspects and dimensions of the chair.

Figure 2.1: Overall view of the KERDOM Ergonomic Office Chair, showcasing its modern design and light blue mesh.

Figure 2.2: Detailed product dimensions, including height, width, and depth, with a weight capacity of 250 lbs.
3. Setup
For detailed assembly instructions, please refer to the official Installation Manual provided in PDF format. Ensure all components, including the casters, are securely attached before use. The chair is designed for straightforward assembly.
Download the Installation Manual (PDF) for step-by-step guidance.
4. Operating Instructions & Adjustments
Your KERDOM office chair offers multiple adjustment options to customize your seating experience for maximum comfort and ergonomic support.
4.1. Ergonomic Design Features

Figure 4.1: The chair provides targeted support for the neck, back, and lumbar regions to promote healthy posture.
4.2. Seat Height Adjustment
To adjust the seat height, locate the lever beneath the seat on the right side. Pull the lever upwards while applying or releasing weight from the seat to move it to your desired height. Release the lever to lock the height.
4.3. Recline Function
The chair features a three-position recline locking function (90°, 115°, 135°) to suit various activities from working to napping.

Figure 4.2: Illustrates the three recline positions and how to adjust the tension knob for reclining.
To recline, pull out the lever on the left side of the chair. To lock the recline position, push the lever back in. Adjust the recline tension by turning the knob located underneath the seat.
4.4. Armrest Adjustment
The 3D armrests offer multi-directional adjustments for personalized comfort.
- Height Adjustment: Press the button on the side of the armrest and slide it up or down.
- Front & Back Adjustment: Slide the armrest pad forward or backward.
- Rotation Adjustment: Rotate the armrest pad left or right.

Figure 4.3: Visual guide to the various adjustments available for the 3D armrests.
4.5. Headrest Adjustment
The headrest can be adjusted for height and rotation to provide optimal neck support.
- Height Adjustment: Gently pull the headrest up or push it down to adjust its vertical position.
- Rotation Adjustment: Rotate the headrest forward or backward to find the most comfortable angle.

Figure 4.4: Demonstrates the height and rotational adjustments of the headrest for personalized comfort.
4.6. Lumbar Support Adjustment
The adjustable lumbar support helps maintain the natural curve of your spine.

Figure 4.5: Shows how to adjust the lumbar support's height and depth for optimal lower back comfort.
- Height Adjustment: Press the side buttons and slide the lumbar support up or down.
- Depth Adjustment: Rotate the knob on the back of the chair to adjust the depth of the lumbar support, pushing it forward or backward.
5. Maintenance
To ensure the longevity and optimal performance of your KERDOM Ergonomic Office Chair, regular maintenance is recommended.
- Cleaning: Wipe clean with a damp cloth as needed. Avoid harsh chemicals or abrasive cleaners that may damage the mesh or frame.
- Inspection: Periodically check all screws and connections to ensure they are tight. Re-tighten if necessary.
- Caster Care: Keep the casters free of debris (hair, dust, etc.) to ensure smooth rolling.
6. Troubleshooting
If you encounter any issues with your KERDOM Ergonomic Office Chair, please refer to the common solutions below. If the problem persists, contact our customer support.
- Chair Sinking/Not Holding Height: Ensure the height adjustment lever is fully engaged. If the issue continues, the gas lift may need replacement.
- Squeaking Noises: Check and tighten all assembly screws. A small amount of silicone lubricant can be applied to moving parts if needed.
- Difficulty Rolling: Clean debris from the casters. Ensure the chair is on a suitable surface (hard floor recommended).
- Armrests Not Adjusting Smoothly: Check for any obstructions. Ensure the adjustment buttons/levers are fully pressed or released.
7. Specifications
| Feature | Detail |
|---|---|
| Brand | KERDOM |
| Model Name | KD977 |
| Color | Lightblue |
| Product Dimensions | 23.2"D x 12.9"W x 20.8"H |
| Maximum Weight Recommendation | 136 Kilograms (300 lbs) |
| Back Style | Solid Back |
| Special Feature | Ergonomic, Rolling, Cushion Availability |
| Product Care Instructions | Wipe Clean |
| Fill Material | Sponge |
| Reclining Position Count | 3 |
| Arm Style | 3D armrests |
| Furniture Base Movement | Swivel |
| Assembly Required | Yes |
8. Warranty and Support
KERDOM is committed to providing high-quality products and excellent customer service. If you have any usage problems or require assistance, our dedicated after-sales team is ready to help you.
8.1. Contact Support
For support inquiries, please refer to the contact information provided with your purchase documentation or visit the official KERDOM website.
8.2. Protection Plans
Optional protection plans are available for extended coverage:
- 2-Year Protection Plan: $32.99
- 3-Year Protection Plan: $40.99
- Complete Protect: $16.99/month (covers all eligible past and future purchases)







