Yaheetech Mesh Office Desk Chair User Manual

1. Product Overview

The Yaheetech Mesh Office Desk Chair is an ergonomic task chair designed for comfort and support during extended periods of use. It features adjustable lumbar support, a breathable mesh back, and a high-density foam padded seat. This manual provides detailed instructions for assembly, operation, and maintenance to ensure optimal performance and longevity of your chair.

Figure 1: Yaheetech Mesh Office Desk Chair (Purple)

2. Important Safety Information

• Do not stand on the chair.
• Ensure all screws and bolts are securely tightened before use.
• Allow a ±1.5cm/0.6'' measurement tolerance during assembly.
• Maximum weight capacity: 300 pounds (136 kg). Do not exceed this limit.
• Keep children away from small parts during assembly.

3. Product Components

Before beginning assembly, verify that all components are present and undamaged. Refer to the list below and the provided diagram.

• Mesh Backrest with Lumbar Support (A)
• Padded Seat Cushion (B)
• Armrests (C) - 2 pieces
• Mechanism Plate (E)
• Star Base (F)
• Gas Lift Cylinder (G)
• Casters (H) - 5 pieces
• Gas Lift Cover (I)
• Screws (J, K) and Hex Wrench

Figure 2: Chair Dimensions and Key Components

4. Assembly Instructions

For a visual guide, please refer to the official installation video provided by Yaheetech.

Step-by-Step Assembly:

1. Attach Casters to Star Base: Insert the five casters (H) into the openings at the end of each leg of the star base (F). Push firmly until they click into place.
2. Insert Gas Lift: Place the gas lift cylinder (G) into the center hole of the star base (F). Cover it with the gas lift cover (I).
3. Attach Armrests to Backrest: Secure the armrests (C) to the mesh backrest (A) using the appropriate screws (K) and the provided hex wrench. Ensure they are firmly attached.
4. Attach Backrest Assembly to Seat Cushion: Align the armrests and backrest assembly (A+C) with the corresponding holes on the underside of the seat cushion (B). Use screws (K) to secure them.
5. Attach Mechanism Plate to Seat Cushion: Position the mechanism plate (E) on the underside of the seat cushion (B), ensuring the "FRONT" label on the plate aligns with the front of the seat. Secure it with screws (J).
6. Connect Seat Assembly to Gas Lift: Carefully place the assembled seat (B+C+E) onto the gas lift cylinder (G) protruding from the star base. Press down firmly to ensure a secure connection.

Once assembled, test all functions and ensure stability before regular use.

5. Operating Instructions

Your Yaheetech office chair offers several adjustable features for personalized comfort.

5.1. Seat Height Adjustment

To adjust the seat height, locate the lever beneath the seat on the right side. While seated, pull the lever upwards to lower the seat. To raise the seat, lift your weight off the chair and pull the lever upwards. Release the lever at your desired height.

Figure 3: Seat Height and Reclining Controls

5.2. Back Height and Lumbar Support Adjustment

The backrest's lumbar support area can be positioned within a fixed range to provide customized support to your lower back. This feature helps alleviate pressure on your spine.

Figure 4: Adjustable Lumbar Support Detail

5.3. Center-Tilt Tension and Rocking Motion

Adjust the tilt tension by turning the knob located beneath the seat. Turn clockwise to tighten the tension (making it harder to recline) and counter-clockwise to loosen it (allowing easier recline). The chair supports a rocking motion between 90° and 105°.

Figure 5: Rocking Motion and Tension Control

5.4. 360° Swivel and Mobility

The chair features a 360° swivel function and smooth-rolling casters on its nylon base, allowing for easy movement and rotation across various floor surfaces.

6. Maintenance and Care

To maintain the appearance and functionality of your chair, follow these simple care instructions:

• Cleaning: Wipe clean with a damp cloth. Avoid harsh chemicals or abrasive cleaners.
• Regular Checks: Periodically check all screws and bolts to ensure they remain tight. Re-tighten if necessary.
• Caster Care: Keep casters free of debris (hair, dust, etc.) to ensure smooth rolling.
• Avoid Direct Sunlight: Prolonged exposure to direct sunlight may cause fading of the mesh and fabric.

7. Troubleshooting

If you encounter any issues with your chair, refer to the following common troubleshooting tips:

8. Product Specifications

• Brand: Yaheetech
• Model Name: Office Chair
• Item Model Number: YT-0010373601
• Color: Purple
• Style: Modern
• Product Dimensions: 23.5"D x 23"W x 39.5"H
• Seat Height Adjustment: 17.7''-21.7'' (45-55cm)
• Maximum Weight Recommendation: 300 Pounds (136 kg)
• Material: Mesh, High-Density Foam, Nylon Base, Steel Gas Spring
• Special Features: Adjustable Height, Ergonomic, Arm Rest, Lumbar Support, Tilting
• Furniture Base Movement: Swivel
• Item Weight: 18.9 pounds
• Country of Origin: China

9. Warranty and Support

Yaheetech offers protection plans for your product. For detailed information regarding warranty coverage and to purchase extended protection plans, please visit the product page on Amazon or contact Yaheetech customer service.

Customer Support: For any questions, concerns, or assistance with your Yaheetech product, please visit the Yaheetech Store on Amazon or refer to the contact information provided with your purchase documentation.

An official Installation Manual (PDF) is also available for download: Download PDF Manual