1. Introdución
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. Información de seguridade
- Asegúrese de que todos os compoñentes estean ben fixados antes do uso.
- Non te pares na cadeira.
- Non exceda a capacidade de peso máxima de 250 libras (113 kg).
- Manteña as mans e os dedos lonxe das pezas móbiles durante o axuste.
- Use a cadeira sobre unha superficie nivelada para evitar que se volque.
3. Contido do paquete
Before assembly, verify that all parts are present. Refer to the included installation manual for a detailed list of components. Typically, the package includes:
- Respaldo
- Coxín de asento
- Reposabrazos (2)
- Cilindro de elevación de gas
- Base de estrelas
- Rodízios (5)
- Placa de mecanismo
- Ferraxes (parafusos, arandelas, chave Allen)
4. Instrucións de montaxe
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:
- Fixe as rodas á base en estrela.
- Insira o cilindro elevador de gas no centro da base en estrela.
- 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.
- Coloque o asento montado no cilindro elevador de gas.
Ensure all screws are tightened firmly, but do not overtighten.
5. Instrucións de funcionamento
5.1. Axuste de altura
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.
- Axustar a tensión de inclinación: 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. Mantemento
6.1. Limpeza
- Limpa co anuncioamp pano. Evite produtos químicos agresivos ou produtos de limpeza abrasivos.
- 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. Atención xeral
- 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 Solución de problemas
- Chirridos da cadeira: Check all bolted connections and tighten if loose. A small amount of silicone lubricant can be applied to moving parts if the squeaking persists.
- Dificultade para axustar a altura: Asegúrate de que a panca do elevador de gas estea completamente activada. Se o problema persiste, pode ser necesario substituír o cilindro do elevador de gas.
- As rodas non xiran suavemente: Remove any hair or debris wrapped around the caster wheels. Clean the wheels and their housings.
- A cadeira parece 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. Especificacións

Image 8.1: Detailed product parameters including dimensions and weight capacity.
| Característica | Especificación |
|---|---|
| Marca | CERDO |
| Nome do modelo | 931-C |
| Dimensións do produto (P x A x A) | 21 cm de profundidade x 9 cm de ancho x 20 cm de alto (total) |
| Chair Height Range | 36.2" - 38.6" (91.9 - 98 cm) |
| Ancho da cadeira | 23.6 polgadas (59.9 centímetros) |
| Ancho do respaldo | 18.5 polgadas (47 centímetros) |
| Altura do respaldo | 18.9 polgadas (48 centímetros) |
| Largura do coxín | 19.3 polgadas (49 centímetros) |
| Cushion Length | 19.7 polgadas (50 centímetros) |
| Grosor do coxín | 2.6 polgadas (6.6 centímetros) |
| Lonxitude do apoyabrazos | 10 polgadas (25.4 centímetros) |
| Altura do reposabrazos | 10.2 polgadas (25.9 centímetros) |
| Diámetro da base | 23.6 polgadas (59.9 centímetros) |
| Recomendación de peso máximo | 250 libras (113 kg) |
| Peso do elemento | 25 libras (11.3 kg) |
| Material | Mesh, Sponge |
| Características especiais | Adjustable Height, Flip-up Armrests, Tilting Function, Swivel, Flexible Casters |
| Estilo de costas | Cross Back (Ergonomic S-shape) |
| Usos recomendados | Oficina, Despacho na casa, Sala de estudo |
9. Garantía e atención ao cliente
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 websitio web para obter a información de contacto e os detalles da garantía máis actuais.





