KERDOM Ergonomic Office Chair 931-C User Manual

1. Introduction

Thank you for choosing the KERDOM Ergonomic Office Chair 931-C. This manual provides detailed instructions for assembly, operation, maintenance, and troubleshooting to ensure optimal use and longevity of your chair. The KERDOM 931-C is designed for comfort and support, featuring an ergonomic design, adjustable armrests, and smooth-rolling casters.

Image 1: The KERDOM Ergonomic Office Chair 931-C in a typical office setting, demonstrating its design and functionality.

Key Features:

• Ergonomic Design: Features a breathable elastic backrest to support correct posture and alleviate back pain.
• Space-Saving: Padded adjustable armrests can be folded up or down, allowing for easy storage under desks.
• Smooth Movement: Equipped with sturdy, noise-reducing casters for effortless mobility.
• Adjustable Functions: Includes rocking function and cushion height adjustment.

2. Safety Information

Please read all safety instructions before assembling and using the chair. Keep this manual for future reference.

• Ensure all components are securely fastened before use.
• Do not stand on the chair.
• Do not use the chair if any parts are damaged or missing.
• Keep children away from moving parts during assembly.
• Avoid exposing the chair to direct sunlight or extreme temperatures.
• Maximum weight capacity: Refer to specifications for details.

3. Package Contents

Before assembly, verify that all parts are present and undamaged. If any parts are missing or damaged, please contact customer support.

• Backrest (1)
• Seat Cushion (1)
• Armrests (2)
• Star Base (1)
• Casters (5)
• Gas Lift Cylinder (1)
• Gas Lift Cover (1)
• Mechanism Plate (1)
• Screws and Allen Wrench (1 set)

4. Assembly Instructions

Assembly typically takes 10 to 20 minutes. Follow these steps carefully:

1. Attach Casters to Base: Insert the five casters into the holes at the end of each leg of the star base until they click securely into place.
2. Insert Gas Lift: Place the gas lift cylinder into the center hole of the assembled star base. Cover it with the gas lift cover.
3. Attach Mechanism Plate: Secure the mechanism plate to the underside of the seat cushion using the provided screws. Ensure the front of the mechanism faces the front of the seat.
4. Attach Armrests: Connect the armrests to the seat cushion using the designated screws. Ensure they are firmly attached.
5. Attach Backrest: Secure the backrest to the seat cushion and armrests using the remaining screws.
6. Connect Seat to Base: Carefully place the assembled seat and backrest onto the gas lift cylinder, ensuring it is centered and stable.

Image 2: An exploded view illustrating the detachable feet, casters, star base, and gas lift cylinder, showing how these components fit together during assembly.

5. Operating Instructions

Your KERDOM 931-C office chair offers several adjustable features for personalized comfort.

5.1. Seat Height Adjustment

Image 3: A visual representation of the seat height adjustment mechanism, demonstrating an 8cm range of motion for the cushion.

To adjust the seat height, locate the lever on the right side under the seat cushion. Lift the lever up while seated to lower the seat, or lift the lever up while standing to raise the seat. Release the lever to lock the height in place. The chair offers approximately 8cm of height adjustment.

5.2. Rocking Function

Image 4: A diagram explaining the rocking function, showing how to engage/disengage it and adjust the tilt tension for a range of 90 to 120 degrees.

The chair features a rocking function for relaxation. To activate the rocking function, pull the lever on the left side (opposite the height adjustment lever) outwards. To lock the chair in an upright position, push the lever inwards.

To adjust the rocking tension, turn the round knob located under the seat, at the front of the mechanism plate. Turn clockwise to tighten the tension (less rocking resistance) or counter-clockwise to loosen (more rocking resistance).

5.3. Armrest Adjustment

The armrests can be folded up or down. Simply lift them to fold them upwards for space-saving storage, or pull them down to use them as arm supports.

6. Maintenance

Regular cleaning and maintenance will help preserve the appearance and functionality of your office chair.

• Cleaning: Wipe down plastic and metal parts with a soft, damp cloth. For mesh fabric, use a mild soap solution and a soft brush, then wipe clean with a damp cloth. Avoid harsh chemicals or abrasive cleaners.
• Inspection: Periodically check all screws and bolts to ensure they are tight. Retighten if necessary.
• Casters: Keep casters free of hair and debris to ensure smooth movement.

7. Troubleshooting

If you encounter any issues with your KERDOM office chair, refer to the following common problems and solutions:

• Chair does not adjust height: Ensure the gas lift lever is fully engaged. Check if the gas lift cylinder is properly inserted into the base and mechanism.
• Chair is wobbly: Verify that all screws and bolts are securely tightened, especially those connecting the armrests, backrest, and mechanism plate to the seat.
• Casters are not rolling smoothly: Check for debris (hair, dust) wrapped around the caster wheels and remove them. Ensure casters are fully inserted into the base.
• Squeaking noises: Apply a small amount of silicone lubricant to moving parts or connection points if squeaking persists after tightening screws.

8. Specifications

Image 5: A detailed diagram illustrating the various dimensions of the KERDOM 931-C office chair in both inches and centimeters.

9. Warranty and Support

For warranty information or customer support, please refer to the documentation provided with your purchase or contact KERDOM customer service directly. Information regarding the availability of spare parts is currently unavailable.

For further assistance, please visit the official KERDOM website or contact their customer support channels.