SIHOO Ergonomic Office Chair V1-M108 Instruction Manual

1. Introduction

This manual provides detailed instructions for the assembly, operation, maintenance, and troubleshooting of your SIHOO Ergonomic Office Chair V1-M108. Please read this manual thoroughly before assembly and use to ensure proper function and longevity of your chair. The SIHOO V1-M108 is designed to provide comprehensive ergonomic support for extended periods of sitting, featuring multiple adjustment options to suit individual preferences.

Figure 1: SIHOO Ergonomic Office Chair V1-M108

2. Setup and Assembly

Follow these steps to assemble your SIHOO Ergonomic Office Chair V1-M108. It is recommended to assemble the chair on a soft, clean surface to prevent damage.

1. Assemble the Chair Base: Insert the five chair leg tubes into the central connection base. Secure them using the provided M6*12 screws (10 screws in total). Ensure all screws are tightened.
2. Attach the Wheels: Insert the five wheels into the ends of the assembled chair legs. Push firmly until they click into place.
3. Install the Gas Lift: Place the chair foot trim cover over the central hole of the chair base. Then, insert the air pressure rod (gas lift) into the middle hole of the chair leg tube connection base.
4. Connect Mechanism to Seat Cushion: Align the mechanism with the underside of the seat cushion. Secure it using four M6*25 screws and small spacers. Tighten securely.
5. Attach Backrest to Seat Cushion: Connect the backrest to the seat cushion using three M8*40 screws, spring lamination, and small shims. Ensure a firm connection.
6. Install Armrests: Insert each armrest into its designated slot on the seat cushion. Use the armrest knobs and big shims to secure them.
7. Final Assembly: Carefully place the assembled upper part of the chair (seat, backrest, armrests) onto the gas lift. Apply gentle downward pressure to ensure it is seated correctly.

Figure 2: Chair dimensions and load capacity for assembly reference.

Figure 3: Overview of adjustable features, indicating key components for assembly.

3. Operating Instructions (Adjustments)

Your SIHOO V1-M108 chair offers various adjustments to customize your seating experience for optimal comfort and ergonomic support.

3.1. Seat Height Adjustment

To adjust the seat height, locate the hand lever on the right side beneath the seat. Rotate the hand lever upwards while applying or releasing body weight to move the seat up or down. Release the lever to lock the height.

3.2. Armrest Adjustments

The 4D armrests provide extensive adjustability:

• Height Adjustment: Press the button on the side of the armrest and move the armrest up or down. Release the button to lock.
• Left and Right Adjustment: The armrests can be adjusted horizontally (left and right) to find your preferred width.
• Forward and Backward Adjustment: Slide the armrest pads forward or backward to support your forearms.
• Swivel Adjustment: The armrest pads can swivel inwards or outwards (up to 40°) for tailored support.

Figure 4: Detailed view of 4D armrest adjustments.

3.3. Backrest Height Adjustment

To adjust the backrest height, pull the backrest upwards. It features 5-gear height adjustment (6cm range) to accommodate users of various heights. Once at the desired height, release to lock.

Figure 5: Backrest height adjustment for various user heights.

3.4. Lumbar Support Adjustment

The chair features 4D lumbar support for customized lower back comfort:

• Depth Adjustment: Use the knob on the side of the backrest to adjust the lumbar support's depth (front and back) to fit your spinal curve.
• Height Adjustment: The lumbar support can also be adjusted vertically (up and down) to target the specific area of your lower back.

Figure 6: Four-dimensional cushioned lumbar pillow adjustment mechanism.

3.5. Seat Depth Adjustment

To adjust the seat depth, pull out the hand lever located beneath the seat. Slide the seat cushion forward or backward (up to 5cm) to ensure proper leg support and reduce pressure on your thighs. Release the lever to lock.

Figure 7: Saddle-shape cushion and seat depth adjustment mechanism.

3.6. Backrest Tilt and Lock

The backrest offers a synchronized tilt function with multiple locking positions:

• Tilt Adjustment: Pull the front hand lever (typically on the left side) to unlock the backrest tilt. Lean back to your desired angle.
• Locking Positions: The chair can be locked at 110°, 120°, 130°, and 140° angles. Pull the lever back to lock the backrest in position.
• Tilt Tension: A knob beneath the seat allows you to adjust the tension of the backrest tilt, making it easier or harder to recline.

Figure 8: 143° backrest synchronized tilt/angle lock mechanism.

3.7. Headrest Adjustment

The headrest is adjustable to support your neck and cervical spine. It offers 5-position height adjustment (5cm range) and can be tilted up to 60°.

Figure 9: Stereo adjustable headrest for neck and cervical spine support.

4. Maintenance

To maintain the condition and functionality of your SIHOO Ergonomic Office Chair V1-M108:

• Cleaning: Wipe clean with a damp cloth. Avoid harsh chemicals or abrasive cleaners that may damage the mesh or frame.
• Inspection: Periodically check all screws and connections to ensure they are tight. Re-tighten if necessary.
• Moving the Chair: When moving the chair, lift it rather than dragging it to prevent damage to the wheels or base.

Figure 10: Close-up of breathable mesh material, highlighting ease of cleaning.

5. Troubleshooting

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

• Armrests do not lock in place or move too easily: Ensure the armrest knobs are securely tightened. If the issue persists, check for any obstructions in the locking mechanism.
• Headrest does not align correctly or feels uncomfortable: Adjust the headrest height and tilt to find the optimal position for your neck and head. Ensure it is securely locked after adjustment.
• Lower back discomfort: Experiment with the 4D lumbar support adjustments (depth and height) to find the setting that best supports your natural spinal curve. Also, ensure the seat depth is adjusted correctly for your leg length.
• Chair feels wobbly: Check all assembly screws, especially those connecting the chair legs to the base and the mechanism to the seat. Tighten any loose screws.

6. Specifications

7. Warranty and Support

SIHOO provides a three-year warranty for this product. For warranty claims, product support, or any inquiries, please contact SIHOO customer service through your purchase platform or the official SIHOO website. Please retain your proof of purchase for warranty validation.