Introduction
This manual provides instructions for the assembly, operation, maintenance, and troubleshooting of your KERDOM Ergonomic Office Chair, Model KD977. Please read this manual thoroughly before assembly and use to ensure proper function and longevity of your chair.
Figure 1: Rear view of the KERDOM Ergonomic Office Chair KD977.
Setup and Assembly
For detailed assembly instructions, please refer to the official Installation Manual (PDF) provided with your product or available for download from the product's Amazon page. The general steps involve:
- Unpack all components and verify against the parts list.
- Attach the casters to the chair base.
- Insert the gas lift cylinder into the chair base.
- Assemble the seat and backrest components.
- Attach the armrests to the seat.
- Connect the assembled seat/backrest to the gas lift cylinder.
- Attach the headrest.
Note: Some users have reported that the armrest bolts may be slightly short. If you encounter difficulty securing the armrests, 6MM x 35MM machine bolts may be required as an alternative to the included 6MM x 30MM bolts.
Figure 2: Ergonomic design of the chair's back and headrest.
Operating Instructions and Adjustments
Your KERDOM Ergonomic Office Chair is designed with multiple adjustment points to provide personalized comfort and support.
1. Seat Height Adjustment
- Locate the lever under the right side of the seat.
- To raise the seat: Lift the lever while taking your weight off the seat.
- To lower the seat: Lift the lever while seated.
2. Recline and Tilt Locking
The chair features a three-position recline locking function (90°, 115°, 135°).
- To recline: Pull out the lever located under the left side of the seat. Lean back to your desired angle.
- To lock the recline: Push the lever back in at your desired angle.
- To adjust tilt tension: Turn the round knob located under the front of the seat clockwise to increase tension (harder to recline) or counter-clockwise to decrease tension (easier to recline).
Figure 3: Recline and tilt adjustment controls.
3. Lumbar Support Adjustment
The adjustable lumbar support helps position your lower back correctly.
- To adjust lumbar height: Press the sides of the lumbar support and slide it up or down.
- To adjust lumbar depth: Rotate the knob on the side of the backrest to increase or decrease the curve.
Figure 4: Lumbar support adjustment.
4. Headrest Adjustment
The headrest can be adjusted for height and angle.
- To adjust headrest height: Grasp the headrest and slide it up or down.
- To adjust headrest angle: Tilt the headrest forward or backward.
Figure 5: Headrest height and angle adjustments.
5. 3D Armrest Adjustment
The armrests offer three-dimensional adjustments for optimal arm and shoulder support.
- 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 inward or outward.
Figure 6: 3D Armrest adjustment options.
Maintenance and Care
Proper maintenance ensures the longevity and appearance of your office chair.
- Cleaning: Wipe clean with a damp cloth. Avoid harsh chemicals or abrasive cleaners.
- Inspection: Periodically check all bolts and screws to ensure they are tight. Re-tighten if necessary.
- Casters: Keep casters free of hair and debris to ensure smooth rolling.
- Mesh Fabric: The high-quality mesh is designed to resist abrasion and deformation. For general cleaning, a soft brush or vacuum cleaner can be used.
Troubleshooting
If you encounter issues with your KERDOM Ergonomic Office Chair, refer to the following common solutions:
- Chair Squeaks: Check all connections and tighten any loose bolts. Applying a small amount of silicone lubricant to moving parts (e.g., gas lift, tilt mechanism) may help.
- Gas Lift Not Adjusting: Ensure the height adjustment lever is fully engaged or disengaged. If the issue persists, the gas lift cylinder may need replacement.
- Armrests Feel Loose: Re-tighten the bolts securing the armrests to the seat. If the armrest pads twist excessively, ensure they are properly seated.
- Headrest Does Not Stay Up: Check the connection points of the headrest to the backrest. Ensure it is securely attached and the adjustment mechanism is functioning.
- Casters Not Rolling Smoothly: Remove any hair, dust, or debris from the caster wheels.
If these steps do not resolve the issue, please contact KERDOM customer support for further assistance.
Specifications
Key specifications for the KERDOM Ergonomic Office Chair KD977:
| Brand | KERDOM |
| Model Number | KD977 |
| Color | White (with black mesh/seat) |
| Product Dimensions (D x W x H) | 23"D x 12.9"W x 20.8"H |
| Maximum Weight Recommendation | 300 Pounds |
| Item Weight | 38.1 pounds |
| Back Style | Cross Back |
| Special Features | Adjustable Headrest, Adjustable Height, Adjustable Lumbar, Ergonomic, Reclining |
| Reclining Positions | 3 (90°, 115°, 135°) |
| Arm Style | 3D Armrests |
| Fill Material | Foam (High-density sponge cushion) |
| Surface Recommendation | Hard Floor |
| Date First Available | June 21, 2023 |
Figure 7: Detailed product dimensions.
Figure 8: Safety and quality components.
Warranty and Support
KERDOM is committed to providing quality products and customer satisfaction. While specific warranty details are not provided in this manual, the manufacturer states that if you have any usage problems, you can contact their after-sales team directly for assistance.
For support inquiries, please refer to the contact information provided with your purchase documentation or visit the official KERDOM store on Amazon: KERDOM Amazon Store.
