hjh OFFICE LENGA Executive Chair Model 660934 Instruction Manual

Introduction

This manual provides detailed instructions for the assembly, operation, and maintenance of your hjh OFFICE LENGA Executive Chair, Model 660934. This high-quality executive chair features genuine leather upholstery, a high ergonomic backrest, and a robust design for optimal comfort and support in an office environment.

Key features include a synchronous mechanism adjustable to individual body weight, leather-covered armrests, and a stable designer base in polished aluminum. Please read these instructions carefully before assembly and use to ensure proper function and longevity of your chair.

Figure 1: The hjh OFFICE LENGA Executive Chair, showcasing its design and black leather finish.

Setup and Assembly

Your hjh OFFICE LENGA Executive Chair requires final assembly. Please ensure all components are present before beginning. It is recommended to assemble the chair on a soft, clean surface to prevent damage.

Components Included:

• Seat with armrests attached
• Backrest
• Chair mechanism
• Gas lift cylinder
• Designer base (polished aluminum)
• 5 x Casters
• Assembly hardware (screws, washers, Allen key)

Assembly Steps:

1. Attach Casters to Base: Insert each of the five casters into the openings at the end of each leg of the designer base. Push firmly until they click into place.
2. Insert Gas Lift: Place the gas lift cylinder into the central hole of the assembled base. Ensure it is seated securely.
3. Attach Mechanism to Seat: Align the chair mechanism with the pre-drilled holes on the underside of the seat. Secure it using the provided screws and Allen key. Ensure the front of the mechanism faces the front of the seat.
4. Attach Backrest to Seat: Connect the backrest to the seat assembly. This typically involves aligning brackets and securing with screws. Refer to the specific diagram in your packaging for precise alignment.
5. Connect Seat Assembly to Gas Lift: Carefully place the assembled seat and backrest onto the gas lift cylinder. The tapered end of the gas lift should fit into the central hole of the chair mechanism. Apply gentle downward pressure to secure.

Operating Instructions

The LENGA Executive Chair offers several adjustment options to customize your seating experience.

1. Seat Height Adjustment (Toplift Mechanism)

• To Raise: While standing, pull the lever located on the right side of the seat upwards. The seat will rise automatically. Release the lever at the desired height.
• To Lower: While seated, pull the lever located on the right side of the seat upwards. The seat will lower under your body weight. Release the lever at the desired height.

2. Synchronous Tilt Mechanism with Tilt Angle Lock

This mechanism allows the seat and backrest to tilt synchronously, promoting dynamic sitting. The opening angle can be adjusted and locked in four positions.

• To Recline: Pull the lever on the left side of the seat outwards to unlock the tilt mechanism. Lean back to recline.
• To Lock Tilt: Push the lever on the left side inwards at one of the four desired tilt angles to lock the chair in position.
• Tension Adjustment: A knob located underneath the seat (usually at the front) allows you to adjust the tension of the tilt mechanism. Turn clockwise to increase tension (requiring more force to recline) or counter-clockwise to decrease tension (making it easier to recline).

Figure 2: Side view illustrating the location of the height and tilt adjustment levers.

3. Caster Functionality (Weight-Activated)

The chair is fitted with weight-activated multi-purpose castors. This design provides freedom of movement while seated and a safety braking mechanism when standing.

• When Seated: The casters are unlocked, allowing the chair to roll freely.
• When Standing: Upon standing up, the safety braking mechanism engages, preventing unwanted movement of the chair. The casters lock automatically when pressure is removed from the seat.

Maintenance

Regular maintenance will help preserve the appearance and functionality of your executive chair.

1. Cleaning

• Leather Upholstery: Wipe with a soft, damp cloth. For deeper cleaning, use a specialized leather cleaner according to the product instructions. Avoid harsh chemicals, abrasive cleaners, or excessive moisture.
• Metal Parts (Base, Armrest Supports): Clean with a soft, dry cloth. For polished aluminum, a mild metal polish can be used sparingly if needed, following product instructions.
• Casters: Periodically clean casters to remove dust, hair, and debris that can impede smooth rolling. Use a small brush or vacuum cleaner.

2. Inspection

• Periodically check all screws and bolts to ensure they are tight. Retighten if necessary to maintain stability and safety.
• Inspect the gas lift and mechanism for any signs of wear or damage.

Figure 3: Front view of the chair, highlighting the leather seat and backrest for cleaning reference.

Troubleshooting

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

Specifications

Detailed technical specifications for the hjh OFFICE LENGA Executive Chair Model 660934.

Figure 4: Dimensional diagram of the LENGA Executive Chair, including height, width, and depth measurements, and maximum weight capacity.

Warranty and Support

Warranty Information

This hjh OFFICE LENGA Executive Chair comes with a 24-month guarantee from the date of purchase. This warranty covers manufacturing defects and material faults under normal use. It does not cover damage caused by misuse, accidents, unauthorized modifications, or normal wear and tear.

Customer Support

For any questions regarding assembly, operation, maintenance, or warranty claims, please contact hjh OFFICE customer support. Please have your model number (660934) and proof of purchase ready when contacting support.

Contact information can typically be found on the hjh OFFICE official website or on your purchase documentation.