amseatec LY-9053

amseatec Ergonomic Mesh Office Chair LY-9053 User Manual

Model: LY-9053

Introduction

Thank you for choosing the amseatec Ergonomic Mesh Office Chair. This manual provides essential information for the safe assembly, operation, and maintenance of your new chair. Designed for comfort and durability, this chair features flip-up armrests, a breathable mesh back, and a thick seat cushion, supporting up to 300 lbs. Please read these instructions carefully before use and retain them for future reference.

Important Safety Information

To ensure safe operation and prevent injury or damage, please observe the following:

  • Always assemble the chair according to the provided instructions.
  • Do not exceed the maximum weight capacity of 300 pounds.
  • Keep the chair away from heat sources and sharp objects to prevent damage to the materials.
  • Ensure all screws and bolts are securely tightened before use. Periodically check and re-tighten as necessary.
  • Avoid standing on the chair or using it as a step stool.
  • Use the chair on a level surface to prevent tipping.

Package Contents

Before beginning assembly, please verify that all components are present:

  • Flip-Up Armrests (Pair)
  • Mesh Backrest Frame
  • Seat Cushion with Solid Coated Steel Base
  • Steel Gas Lift Cylinder
  • Tilt Mechanism with Tension Control Knob
  • Assembly Hardware (screws, washers, hex wrench)
Exploded view of chair components including seat, backrest, armrests, gas lift, and base.

Image: All components included in the package for assembly.

Assembly Instructions

Your amseatec office chair is designed for quick and easy assembly, typically taking about 15 minutes with the included tools. Follow these steps:

  1. Attach the casters to the five-star chair base.
  2. Insert the gas lift cylinder into the center hole of the base.
  3. Secure the tilt mechanism to the underside of the seat cushion using the provided screws.
  4. Attach the backrest frame to the seat cushion.
  5. Mount the flip-up armrests to both the seat and backrest.
  6. Place the assembled seat and backrest onto the gas lift cylinder.
Diagram showing the simple assembly steps for the office chair.

Image: Visual guide for quick and easy chair assembly.

Operating Instructions

Height Adjustment

To adjust the chair's height, pull the lever located under the seat upwards while applying or releasing your body weight. Release the lever at the desired height.

Rocking Tilt & Tension Control

The chair features a 90–110° rocking tilt function. To activate the tilt, pull the lever outwards. Push the lever inwards to lock the chair in an upright position. The tension of the rocking motion can be adjusted by turning the round knob located under the seat.

Flip-Up Armrests

The armrests can be flipped up 90 degrees, allowing the chair to be tucked under a desk for space-saving storage. Simply lift the armrests upwards until they lock into the vertical position. To lower them, pull them down until they click into place.

Office chair with armrests flipped up, demonstrating space-saving feature.

Image: Chair with flip-up armrests, ideal for compact spaces.

360° Swivel & Rolling Casters

The chair offers a smooth 360° swivel for easy movement and access to your workspace. The durable rolling casters allow for effortless mobility across various floor types.

Lumbar Support & Seat Cushion

The ergonomic design includes built-in lumbar support in the breathable mesh backrest, adapting to your posture for comfort. The thick, high-density seat cushion provides sustained comfort during extended sitting periods.

Close-up of the chair's lumbar support and breathable mesh backrest.

Image: Ergonomic lumbar support integrated into the mesh backrest.

Detailed view of the multi-layered, high-density foam seat cushion.

Image: Thick, multi-layered seat cushion for enhanced comfort.

Maintenance

To keep your amseatec office chair in optimal condition:

  • Wipe clean with a damp cloth. Avoid harsh chemicals or abrasive cleaners.
  • Periodically check all fasteners and re-tighten if necessary to ensure stability.
  • Avoid prolonged exposure to direct sunlight to prevent fading of materials.

Troubleshooting

If you encounter any issues with your chair, please refer to the following common solutions:

  • Chair is wobbly: Ensure all assembly screws are fully tightened. Check that the casters are securely inserted into the base.
  • Height adjustment not working: Verify that the gas lift lever is fully engaged and that the gas lift cylinder is correctly seated in the base and seat mechanism.
  • Rocking function is too stiff/loose: Adjust the tension control knob located under the seat. Turn clockwise to increase tension (stiffer), and counter-clockwise to decrease tension (looser).
  • Casters not rolling smoothly: Check for any debris (hair, dust) caught in the casters and clean them. Ensure the chair is on a suitable surface.

If problems persist, please contact customer support.

Specifications

FeatureDetail
Brandamseatec
Model NameLY-9053
ColorBeige
Product Dimensions23.4"D x 27.4"W x 39.4"H
Maximum Weight Recommendation300 Pounds
MaterialAerospace-Grade Plastic, Breathable Mesh, High-Density Foam, Oxford Fabric, Solid Reinforced Coated Steel Base, Steel Gas Lift
Back StyleMid-Back Ergonomic Mesh
Arm StyleFlip-up Armrests
Special Features5-Year Warranty, BIFMA, SGS, TUV Certified, Space-Saving Flip-Up Armrests
Furniture Base MovementSwivel
TiltingYes (90-110° with tension control)
Item Weight23.2 pounds
Certifications logos including BIFMA, SGS, and TUV SUD.

Image: BIFMA, SGS, and TUV certifications for quality and safety.

Warranty and Support

Your amseatec Ergonomic Mesh Office Chair comes with an industry-leading 5-year warranty, ensuring long-term support and peace of mind. Additionally, Amazon offers a 30-day hassle-free return policy.

For any questions, assistance, or warranty claims, please contact amseatec customer support. We also offer 24/7 text support for your convenience.

Icons representing 24/7 text support, 30-day returns, and 5-year warranty.

Image: Overview of support and warranty benefits.

© 2026 amseatec. All rights reserved.

Ask a question about this manual

Ask about setup, troubleshooting, compatibility, parts, safety, or missing instructions. Manuals+ will review the question and use this page’s manual context to help answer it.