1. Introdução
Thank you for choosing the CLAGE CEX-U Electronic Instantaneous Water Heater. This manual provides essential information for the safe and efficient installation, operation, and maintenance of your appliance. Please read these instructions carefully before installation and use, and keep them for future reference.
The CLAGE CEX-U is an electronically controlled instantaneous water heater designed for under-sink mounting in kitchens, providing hot water precisely when needed. Its compact design and accurate temperature selection ensure comfort and efficiency.
2. Instruções de segurança
Importante: O não cumprimento destas instruções de segurança pode resultar em choque elétrico, incêndio ou ferimentos pessoais.
- Instalação profissional necessária: The installation of this non-plug-in device must be carried out by a qualified electrician or a registered specialist in accordance with local regulations and wiring rules.
- Conexão elétrica: Ensure the electrical supply matches the specifications of the appliance (400 V, 11-13.5 kW). The device must be properly grounded.
- Conexão de água: All water connections must be performed by a qualified plumber. Ensure all connections are watertight to prevent leaks.
- Temperatura de operação: The water heater delivers hot water up to 60°C. Exercise caution to prevent scalding, especially with children or individuals with reduced physical, sensory, or mental capabilities.
- Manutenção: Desconecte a fonte de alimentação antes de realizar qualquer manutenção ou limpeza.
- Dano: Não utilize o aparelho se estiver danificado. Contate um técnico qualificado para repará-lo.
3. Produto acabadoview
The CLAGE CEX-U is an advanced electronic instantaneous water heater designed for efficient hot water supply.
Principais características:
- Electronically regulated for precise temperature control.
- Pressure-resistant design, compatible with both pressure-resistant and pressure-free fittings.
- Compact dimensions for easy under-sink installation.
- Sensor button control panel with LED display for accurate temperature input between 20°C and 60°C.
- Suitable for reheating pre-heated water, such as from a solar system.
- Smart Control via Smartphone App (Special Feature).

Figura 1: Frente view of the CLAGE CEX-U Electronic Instantaneous Water Heater, showing the LED display and sensor control buttons.
4. Configuração e instalação
Installation of the CLAGE CEX-U must be performed by a qualified professional. This section provides general guidance.
4.1 Local de Montagem
The unit is designed for under-sink mounting. Ensure there is sufficient space for the appliance and its connections. The compact dimensions (approximately 31 x 31 x 11 cm) allow for installation under most kitchen sinks.

Figura 2: The CLAGE CEX-U installed under a kitchen sink, illustrating its compact size (approx. 29.4 cm height, 17.7 cm width, 10.4 cm depth) and external 10 cm water connections. The image also indicates "Made in Germany".
4.2 Electrical Connection (400 V)
The appliance requires a 400 V, 3-phase electrical supply. The power setting (11 kW or 13.5 kW) is adjustable during installation. A power cable (approx. 65 cm) for a 3-phase cooker connection box is included. This connection must be made by a qualified electrician.
4.3 Conexão de Água
The CLAGE CEX-U is suitable for both pressure-resistant and pressure-free fittings. The external water connections are designed for easy installation.

Figura 3: Installation diagram showing two configurations for the CLAGE CEX-U with a 400 V power supply. The left diagram illustrates standard installation with a pressure-free fitting. The right diagram shows installation with a pressure-resistant fitting, including a T-piece and pressure hose (supplied). Both diagrams emphasize professional installation.

Figura 4: The CLAGE CEX-U installed discreetly under a kitchen sink, demonstrating its space-saving design. The image highlights features such as desired temperature setting via sensor buttons, no mixing with cold water, a large LED display, instant hot water without waiting, and an optional remote control.
5. Instruções de operação
The CLAGE CEX-U features an intuitive sensor button control panel with an LED display.
5.1 Seleção de Temperatura
- Ensure the appliance is powered on.
- Use o + e - sensor buttons on the control panel to adjust the desired water temperature. The LED display will show the selected temperature.
- The temperature can be set accurately between 20°C and 60°C.
- Once the desired temperature is set, open the hot water tap. The unit will instantly heat the water to the selected temperature.
5.2 Smart Control (Optional)
If your model includes the Smart Control feature, you can manage settings via a smartphone application. Refer to the separate Smart Control manual or app instructions for detailed usage.
6. Manutenção
A manutenção regular garante a longevidade e o funcionamento eficiente do seu aquecedor de água. Desligue sempre a alimentação elétrica antes de realizar qualquer manutenção.
6.1 Limpeza do Exterior
- Limpe a parte externa casing com um suave, damp pano.
- Não utilize produtos de limpeza abrasivos, solventes ou produtos químicos agressivos, pois estes podem danificar a superfície.
6.2 Descalcificação
In areas with hard water, limescale can build up inside the appliance, affecting performance. Descaling should be performed by a qualified technician. The frequency depends on water hardness and usage.
6.3 Inspeção Geral
Periodically check for any signs of leaks or unusual noises. If any issues are detected, contact a qualified service technician immediately.
7. Solução De Problemas
Antes de entrar em contato com o serviço de atendimento ao cliente, verifique os seguintes problemas comuns:
| Problema | Possível causa | Solução |
|---|---|---|
| Sem água quente | No power supply; Water supply off; Appliance fault. | Check circuit breaker; Ensure water valve is open; Contact service technician. |
| Água não está quente o suficiente | Temperature setting too low; High flow rate; Limescale buildup. | Increase temperature setting; Reduce water flow; Contact technician for descaling. |
| A água está muito quente | Configuração de temperatura muito alta. | Diminua a temperatura. |
| Vazamento | Conexões soltas; Vedações danificadas. | Immediately turn off water supply and power; Contact a qualified plumber. |
For issues not listed here or if solutions do not resolve the problem, please contact CLAGE customer support or a qualified service technician.
8. Especificações
Detailed technical specifications for the CLAGE CEX-U Electronic Instantaneous Water Heater.
| Recurso | Detalhe |
|---|---|
| Marca | CLAGE |
| Número do modelo | 2400-26413 |
| Cor | Branco |
| Dimensões do produto (C x L x A) | 31 x 31 x 11 cm |
| Peso do item | 3.18 quilos |
| Potência / Wattage | 11-13.5 kW (adjustable), 13500 watts (max) |
| Fonte de energia | Electric (400 V) |
| Material | Plástico |
| Classe de Eficiência Energética | A+ to F |
| Características especiais | Smart Control via Smartphone App |
| Taxa de fluxo máxima | 13.5 litros por minuto |
| Temperatura Máxima | 60 graus Celsius |
9. Garantia e Suporte
For warranty information, technical support, or service requests, please refer to the warranty card included with your product or visit the official CLAGE website. Ensure you have your model number (CEX-U, 2400-26413) and purchase date available when contacting support.





