Humanscale World LM WL11B1J10AU19SS

Humanscale World LM Ergonomic Office Chair Instruction Manual

Model: World LM WL11B1J10AU19SS

Introduction

This manual provides instructions for the assembly, operation, maintenance, and troubleshooting of your Humanscale World LM Ergonomic Office Chair. The World LM chair features a breathable mesh back, self-adjusting lumbar support, and a frameless front edge designed to reduce pressure behind the knees. It is designed to adapt to various body types and support users up to 400 lbs.

Setup

The Humanscale World LM chair is designed for simple, two-piece assembly without the need for tools. Follow these steps to assemble your chair:

  1. Carefully unbox all components. Ensure you have the chair top (seat and backrest assembly) and the chair base (with casters and gas lift cylinder).
  2. Place the chair base on a flat, stable surface.
  3. Align the central hole on the underside of the chair top with the top of the gas lift cylinder on the base.
  4. Gently lower the chair top onto the gas lift cylinder. Apply firm, even pressure to ensure it is securely seated. You may hear a click as it locks into place.
  5. Test the chair by sitting on it and applying your weight to ensure all components are stable.
Humanscale World LM chair assembly diagram showing two main parts: seat/backrest and base with gas lift.
Figure 1: Two-piece assembly of the Humanscale World LM chair. No tools are required for this process.

Operating Instructions

The Humanscale World LM chair is designed for intuitive adjustments that adapt to your body's movements. It features a weight-sensitive recline mechanism and adjustable components to optimize your sitting experience.

Chair Height Adjustment

To adjust the chair's height, locate the lever typically found under the right side of the seat. While seated, lift the lever to lower the chair. To raise the chair, stand up slightly to remove weight from the seat, then lift the lever. Release the lever at your desired height. The chair offers approximately 13.75 inches of height adjustment.

Recline Function

The World LM chair features a weight-sensitive recline that adapts to your body without manual levers or locks. Simply lean back to recline and lean forward to return to an upright position. The chair provides up to 17 degrees of recline.

Woman sitting in Humanscale World LM chair, leaning back comfortably, demonstrating the recline function.
Figure 2: The chair's design promotes spontaneous movement and adapts to the user's body for comfort.

Armrest Adjustment

The armrests are height-adjustable and move in conjunction with the chair's height adjustments. To adjust armrest height, grasp the armrest and move it up or down. The armrests offer approximately 4.6 inches of adjustment.

360° Swivel

The chair base allows for a full 360-degree swivel, providing flexibility and ease of movement within your workspace.

Side view of Humanscale World LM chair with labels pointing to adaptable back mesh, height-adjustable arms, upholstered seat, height adjustment lever, and 360-degree swivel.
Figure 3: Key adjustable features of the Humanscale World LM chair, including back mesh, armrests, seat, and swivel.

Maintenance

Regular maintenance helps preserve the appearance and functionality of your Humanscale World LM chair.

  • Cleaning Mesh and Fabric: For general cleaning, use a soft cloth dampened with mild soap and water. Avoid harsh chemicals or abrasive cleaners, as these can damage the material.
  • Caster Care: Periodically check the casters for accumulated dust or debris. Clean them as needed to ensure smooth rolling.
  • Frame Inspection: Regularly inspect the chair frame for any loose connections or signs of wear. Tighten any loose fasteners if necessary.
Front view of the Humanscale World LM ergonomic office chair, showcasing its mesh back and fabric seat.
Figure 4: The Humanscale World LM chair features a durable mesh back and fabric seat, requiring gentle cleaning.

Troubleshooting

If you encounter issues with your Humanscale World LM chair, refer to the following common problems and solutions:

ProblemPossible CauseSolution
Chair does not adjust height.Gas lift cylinder malfunction or lever not fully engaged.Ensure the height adjustment lever is fully engaged. If the issue persists, the gas lift cylinder may require replacement.
Chair rolls too easily or uncontrollably.Casters are designed for smooth movement, or casters are loose.The casters are designed for easy mobility. If excessive, ensure casters are fully inserted into the base. Consider using a chair mat on hard floors to reduce unwanted movement.
Armrests get stuck during adjustment.Mechanism obstruction or wear.Check for any visible obstructions. Apply gentle, even pressure when adjusting. If the issue persists, contact support.
Lack of lumbar support.Chair's self-adjusting lumbar may not suit all preferences.The chair features self-adjusting lumbar support. For additional support, a separate lumbar pillow may be used.

Specifications

Detailed specifications for the Humanscale World LM Ergonomic Office Chair.

  • Brand: Humanscale
  • Model Name: World LM
  • Model Number: WL11B1J10AU19SS
  • Color: Black - Black Mesh, Black Fabric
  • Material: Textile, foam (Seat), Mesh (Backrest)
  • Product Dimensions (Overall): 27"D x 29.5"W x 23"H
  • Item Dimensions (Seat/Back): 16.4"D x 20.2"W x 16"H
  • Item Weight: 27 pounds
  • Maximum Weight Recommendation: 400 pounds
  • Seat Height: 18.1 inches (adjustable range: 16" - 21")
  • Seat Depth: 17.9 inches
  • Seat Length: 20.8 inches
  • Chair Backrest Width: 20.2 inches
  • Height Adjustment Range: 13.75 inches
  • Recline Position Count: More than 1 (weight-sensitive, up to 17 degrees)
  • Arm Adjustment: 4.6 inches
  • Swivel: 360 degrees
  • Included Components: Caster
  • UPC: 810172967335
Diagram showing detailed dimensions of the Humanscale World LM ergonomic office chair, including height, width, depth, seat height, and arm adjustment ranges.
Figure 5: Dimensional overview of the Humanscale World LM chair, including height adjustment, recline, and arm adjustment specifications.

Warranty and Support

Warranty Information: The manufacturer states "No warranty" for this product. Please refer to your retailer's return policy for details on returns or exchanges.

Customer Support: For further assistance, product inquiries, or to report any issues not covered in this manual, please contact Humanscale customer service through their official website or your product retailer.

You can visit the Humanscale store for more information: Humanscale Store

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