KERDOM Ergonomic Desk Chair KD968ZK Instruction Manual

Introduction

Thank you for choosing the KERDOM Ergonomic Desk Chair KD968ZK. This manual provides detailed instructions for assembly, operation, maintenance, and troubleshooting to ensure optimal use and longevity of your chair. Please read this manual thoroughly before assembly and use.

Figure 1: KERDOM Ergonomic Desk Chair KD968ZK

Important Safety Information

• This product is designed for adult use.
• Maximum weight recommendation: 300 pounds (136 kg).
• Improper use of adjustable parts may pose a risk. Always adjust with care and ensure components are securely fastened.
• Do not stand on the chair.
• Do not use the chair as a step stool.
• Ensure all screws and bolts are tightened before use and periodically check for looseness.

Parts List

Before beginning assembly, verify that all components are present and undamaged. Refer to the assembly video for visual identification of parts.

Setup and Assembly

Follow these steps carefully for proper assembly. An Allen driver is included for tightening screws.

Step 1: Assemble the Chair Base

1. Take out the Split Base Tube (4) and Central Base Tube (5).
2. Insert Split Base Tube (4) into Central Base Tube (5) as shown in the assembly video.
3. Align with the screw holes and tighten the M6x12mm Screws (17) using the Allen Driver (18) to fix the 5 Split Base Tubes (4) to the Central Base Tube (5). Repeat five times.

Step 2: Install the Castors

1. Take out the 5 Castors (9).
2. Insert each Castor (9) into the end of each Split Base Tube (4) from Step 1. Ensure they are inserted deeply to prevent them from falling out.

Step 3: Insert the Gas Lift

1. Take out the Gas Lift (10).
2. Insert the Gas Lift (10) into the hole of the Central Base Tube (5). Set this assembly aside for later.

Step 4: Attach Armrests to Seat Cushion

1. Take out the Seat Cushion (3). Note the 'FRONT' sticker on the front edge of the seat cushion.
2. Position the Armrests (6) under the Seat Cushion (3). Align the three screw holes.
3. Tighten the M6x30mm Screws (16) with the Allen Driver (18) to fix both Armrests (6) to the bottom of the Seat Cushion (3).

Step 5: Attach Mechanism to Seat Cushion

1. Take out the Mechanism (7).
2. Place the Mechanism (7) on the bottom of the Seat Cushion (3), ensuring the lever faces the right side of the chair. Align the four screw holes.
3. Tighten the M6x20mm Screws (14) with the Allen Driver (18) to fix the Mechanism (7) to the bottom of the Seat Cushion (3).

Step 6: Attach Keel to Mechanism

1. Take out the Keel (8).
2. Attach the Keel (8) to the Mechanism (7) using the M8x25mm Screws (15), Spring Shim (13), and Flat Gasket (12) with the Allen Driver (18).

Step 7: Attach Backrest and Headrest

1. Take out the Back (2). Align the three screw holes on the backrest with the Keel (8).
2. Tighten the M6x20mm Screws (14) with the Allen Driver (18) to fix the Back (2) to the Keel (8). Cover the screws with L2 (11).
3. In the same way, tighten the M6x20mm Screws (14) with the Allen Driver (18) to fix the Headrest (1) to the Back (2). Cover the screws with L1 (11).

Step 8: Connect Seat Assembly to Base

1. Take the completed seat assembly from previous steps.
2. Align the hole in the middle of the Mechanism (7) with the Gas Lift (10) inserted into the base.
3. Insert the seat assembly onto the Gas Lift (10). Press down firmly on the seat cushion with your full strength to ensure the components combine securely.
4. Caution: If the Gas Lift (10) does not insert into the Mechanism (7) firmly, the seat is likely to fall off when the chair is raised.

Operating Instructions

The KERDOM Ergonomic Desk Chair KD968ZK offers several adjustable features for personalized comfort.

1. Seat Height Adjustment

• To raise the seat: While seated, lift the lever located under the right side of the seat. The seat will rise. Release the lever at the desired height.
• To lower the seat: While seated, lift the lever. The seat will lower. Release the lever at the desired height.

2. Backrest Recline and Lock

• To recline: Pull the lever located under the left side of the seat outwards to unlock the backrest. Lean back to the desired angle. Push the lever inwards to lock the backrest in place.
• The chair features a three-stage back lock, allowing you to secure the backrest at different recline angles (e.g., 90°, 115°, 130°).

3. Tilting Tension Adjustment

• The knob under the center of the seat controls the tilting tension.
• Turn clockwise to increase tension (making it harder to recline).
• Turn counter-clockwise to decrease tension (making it easier to recline).

Figure 2: Illustration of tilting and tension adjustment.

4. 3D Adjustable Armrests

• The armrests can be adjusted in three dimensions: height, forward/backward, and swivel.
• To adjust height: Press the button on the side of the armrest and move it up or down. Release the button to lock.
• To adjust forward/backward or swivel: Manually slide the armrest pad to the desired position.

Figure 3: Demonstration of 3D adjustable armrests.

5. Adjustable Headrest

• The headrest can be adjusted for height and angle.
• To adjust height: Gently pull the headrest up or push it down to your preferred position.
• To adjust angle: Tilt the headrest forward or backward to support your neck.

Figure 4: Ergonomic design providing head, back, and lumbar support.

6. 360° Swivel and Roller Blade Wheels

• The chair features a 360° swivel function for easy movement and access.
• The roller blade wheels are designed for silent, smooth movement and protect various floor types from scratches.

Figure 5: Illustration of the strong wheelbase and silent roller blade wheels.

Maintenance

• Cleaning: Wipe the mesh and plastic parts with a damp cloth and mild soap. Avoid harsh chemicals.
• Inspection: Periodically check all screws and bolts to ensure they are tight. Re-tighten if necessary.
• Lubrication: The gas lift and moving parts generally do not require lubrication. If squeaking occurs, a small amount of silicone spray can be applied to pivot points.
• Avoid Overloading: Do not exceed the maximum weight capacity of 300 pounds (136 kg).

Troubleshooting

Specifications

• Brand: KERDOM
• Model Number: KD968ZK
• Color: Black
• Product Dimensions: 24.4"D x 25.6"W x 51.2"H (62cm D x 65cm W x 130cm H)
• Item Weight: 40.9 pounds (18.55 kg)
• Material: Alloy Steel, Polyurethane, Mesh
• Special Features: Ergonomic Design, Adjustable Headrest, 3D Adjustable Armrests, Breathable Mesh, Roller Blade Wheels, Tilting Function
• Maximum Weight Capacity: 300 pounds (136 kg)

Figure 6: Detailed dimensions of the KERDOM Ergonomic Desk Chair KD968ZK.

Warranty and Support

For warranty information or technical support, please refer to the product packaging or contact KERDOM customer service directly. Our professional after-sales service team is ready to provide satisfactory solutions for any questions or issues you may encounter.

Contact information can typically be found on the manufacturer's website or through your purchase platform.