1. Introducció
This manual provides essential information for the safe and efficient use of your KERDOM Office Chair Model 931-C. Please read these instructions carefully before assembly and operation. Keep this manual for future reference.

Image 1.1: The KERDOM Office Chair Model 931-C, featuring an orange mesh back and seat with white frame and base, shown in an office setting.
2. Informació de seguretat
- Assegureu-vos que tots els components estiguin ben subjectats abans d'utilitzar-los.
- No us atureu a la cadira.
- No supereu la capacitat màxima de pes de 250 lliures (113 kg).
- Mantingueu les mans i els dits allunyats de les peces mòbils durant l'ajust.
- Feu servir la cadira sobre una superfície plana per evitar que es bolqui.
3. Contingut del paquet
Before assembly, verify that all parts are present. Refer to the included installation manual for a detailed list of components. Typically, the package includes:
- Respatller
- Coixí de seient
- Reposabraços (2)
- Cilindre d'elevació de gas
- Base d’estrelles
- Rodes (5)
- Placa de mecanisme
- Hardware (screws, washers, Allen wrench)
4. Instruccions de muntatge
For detailed, step-by-step assembly instructions, please refer to the official Installation Manual PDF provided with your purchase. A digital version can be accessed via this link: KERDOM Office Chair Installation Manual (PDF).
General assembly steps typically involve:
- Fixeu les rodes a la base d'estrella.
- Inseriu el cilindre d'elevació de gas al centre de la base en estrella.
- Secure the mechanism plate to the underside of the seat cushion.
- Attach the armrests to the seat cushion.
- Connect the backrest to the seat cushion and armrests.
- Place the assembled seat onto the gas lift cylinder.
Ensure all screws are tightened firmly, but do not overtighten.
5. Instruccions de funcionament
5.1. Ajust d'alçada
To adjust the seat height, locate the lever on the right side beneath the seat. While seated, pull the lever up to lower the seat. To raise the seat, stand up and pull the lever up. Release the lever at the desired height to lock it in place.

Image 5.1: The chair features adjustable height, 360-degree rotation, and flexible casters for various floor types.
5.2. Armrest Adjustment (Flip-up Function)
The armrests are designed to flip up 90 degrees. To raise an armrest, simply lift it upwards until it locks into the vertical position. To lower it, pull it down. This feature allows the chair to be stored under a desk, saving space.

Image 5.2: The flip-up armrests allow the chair to be neatly stored under a desk, optimizing space.
5.3. Tilt/Rocking Function
The chair features a 120-degree tilt tension and rocking function. Locate the lever on the left side beneath the seat.
- Engage/Disengage Rocking: Pull the lever outwards to enable the rocking function. Push it inwards to lock the backrest in an upright position.
- Adjust Tilt Tension: The round knob located at the front center beneath the seat controls the tilt tension. Turn clockwise to tighten the tension (making it harder to recline) and counter-clockwise to loosen it (making it easier to recline).

Image 5.3: Controls for the rocking function and tilt tension adjustment.
5.4. Swivel and Casters
The chair offers a full 360-degree swivel for ease of movement. The flexible casters are designed for smooth rolling on various floor surfaces, including marble, wood, and carpet.

Image 5.4: The S-shaped backrest provides ergonomic support, complemented by a 30-degree back tilt for comfort.
6. Manteniment
6.1. Neteja
- Netegeu amb un anunciamp drap. Eviteu productes químics agressius o netejadors abrasius.
- For the mesh backrest and fabric seat, use a vacuum cleaner with a brush attachment to remove dust and debris.
- Periodically check and clean the casters to ensure smooth movement and prevent floor damage.
6.2. Atenció general
- Regularly inspect all screws and connections to ensure they remain tight. Retighten as necessary.
- Avoid prolonged exposure to direct sunlight to prevent fading of materials.
- Do not place hot items directly on the chair's surfaces.
7. Solució De Problemes
- Grinyols de cadira: Check all bolted connections and tighten if loose. A small amount of silicone lubricant can be applied to moving parts if the squeaking persists.
- Dificultat per ajustar l'alçada: Assegureu-vos que la palanca d'elevació de gas estigui completament activada. Si el problema persisteix, és possible que calgui substituir el cilindre d'elevació de gas.
- Rodes que no giren suaument: Remove any hair or debris wrapped around the caster wheels. Clean the wheels and their housings.
- La cadira sembla inestable: Verify that the chair is on a flat surface and all components, especially the base and backrest, are securely attached.
- Seat Cushion Flattening: Over time, seat cushions may compress. While this is normal wear, if it significantly impacts comfort, consider adding a supplementary cushion or contacting customer support for options.
8. Especificacions

Image 8.1: Detailed product parameters including dimensions and weight capacity.
| Característica | Especificació |
|---|---|
| Marca | KERDOM |
| Nom del model | 931-C |
| Dimensions del producte (P x A x A) | 21" de profunditat x 9" d'amplada x 20" d'alçada (total) |
| Chair Height Range | 36.2" - 38.6" (91.9 - 98 cm) |
| Amplada de la cadira | 23.6 polzades (59.9 cm) |
| Amplada del respatller | 18.5 polzades (47 cm) |
| Alçada del respatller | 18.9 polzades (48 cm) |
| Cushion Width | 19.3 polzades (49 cm) |
| Cushion Length | 19.7 polzades (50 cm) |
| Gruix del coixí | 2.6 polzades (6.6 cm) |
| Longitud del reposabraços | 10 polzades (25.4 cm) |
| Alçada del reposabraços | 10.2 polzades (25.9 cm) |
| Diàmetre de la base | 23.6 polzades (59.9 cm) |
| Recomanació de pes màxim | 250 lliures (113 kg) |
| Pes de l'article | 25 lliures (11.3 kg) |
| Material | Mesh, Sponge |
| Característiques especials | Adjustable Height, Flip-up Armrests, Tilting Function, Swivel, Flexible Casters |
| Estil d'esquena | Cross Back (Ergonomic S-shape) |
| Usos recomanats | Oficina, Despatx a casa, Sala d'estudi |
9. Garantia i atenció al client
For warranty information and any product-related inquiries or issues, please contact KERDOM customer service. Our after-sales team is available to assist you.
Please refer to your purchase documentation or the KERDOM official weblloc web per obtenir la informació de contacte i els detalls de la garantia més actualitzats.





