1. Produto acabadoview
The TESY BiLight Electric Hot Water Cylinder is an unvented hot water solution designed for energy-efficient hot water supply to multiple points of use. It incorporates Insutech technology to reduce heat loss by 16% compared to similar products, meeting high European Energy Efficiency, Quality, and Safety standards.
Os principais recursos incluem:
- Offers Low Cost, Energy Efficient Hot Water
- Patented Piston Effect to control refilling
- Glass Ceramic Coating for corrosion resistance and Freeze Protection
- Wall Mounted design, suitable for various settings including homes, businesses, kitchens, hairdressers, and camp locais
- Light Indicator to show heating status
- Equipped with a Safety Temperature Pressure Valve
- Thermal Load Temperature Safety Cut Out for enhanced safety

Figura 1: Frente view of the TESY BiLight Electric Hot Water Cylinder, showing the main unit and indicator panel.
2. Informações de segurança
Importante: Installation of unvented hot water cylinders is subject to Building Control Regulations in the UK. It is mandatory to seek advice from and use a qualified installer for the installation of this product. Failure to comply with regulations can lead to serious hazards and may void your warranty.
UK building regulations require two forms of safety to be installed. This hot water cylinder is fitted with a temperature safety cut-off switch. Additionally, it is strongly recommended to install a safety expansion vessel and a pressure release valve within the connecting plumbing system to ensure full compliance and safe operation.
- Desligue sempre a energia antes de realizar qualquer manutenção ou instalação.
- Assegure-se de que a ligação elétrica esteja devidamente aterrada.
- Do not operate the unit if any part is damaged or if there are signs of leakage.
- Mantenha materiais inflamáveis longe do aquecedor de água.
- Assegure-se de que haja ventilação adequada ao redor da unidade.
3. Instalação (Configuração)
Installation must be carried out by a qualified professional in accordance with local building codes and regulations, particularly those pertaining to unvented hot water systems.
3.1. Seleção do local
- Choose a location that can support the weight of the cylinder when full (approximately 126 kg for the 100 Litre model).
- Ensure adequate space for maintenance and access to connections.
- The unit is designed for wall mounting.
- Proteja a unidade de temperaturas congelantes.
3.2. Montagem da Unidade
- Securely attach the wall mounting brackets to a structurally sound wall using appropriate fasteners.
- Carefully lift and hang the cylinder onto the installed brackets. Ensure it is level and stable.
3.3. Conexões de encanamento
- Connect the cold water supply to the inlet (typically marked blue). The unit has 15mm water connections.
- Connect the hot water outlet (typically marked red) to your hot water distribution system.
- Install a safety expansion vessel and pressure release valve as required by regulations and manufacturer recommendations.
- Certifique-se de que todas as conexões estejam estanques.
3.4. Conexão elétrica
- Connect the unit to a dedicated 220 Volts electrical supply circuit.
- Ensure the circuit is protected by an appropriate circuit breaker and RCD (Residual Current Device).
- All electrical work must comply with local electrical codes and be performed by a qualified electrician.

Figura 2: Detalhado views of the TESY BiLight water heater, showing the bottom connections, temperature control dial, and wall mounting bracket.
4. Operação
Once installed and filled with water, the TESY BiLight water heater is designed for straightforward operation.
4.1. Inicialização inicial
- Ensure the cylinder is completely filled with water before switching on the power. Open a hot water tap to allow air to escape until water flows steadily.
- Switch on the electrical power supply to the unit.
- The light indicator on the unit will illuminate, indicating that the heating element is active and water is being heated.
4.2. Controle de temperatura
The unit features a temperature control dial, typically located at the bottom or side of the unit (refer to Figure 2). Rotate the dial to adjust the desired water temperature. Higher settings will provide hotter water, but also consume more energy. The unit has a built-in overheat protection system.
4.3. Operação normal
The water heater will automatically maintain the set temperature. The light indicator will turn off once the desired temperature is reached and will illuminate again when the heating element reactivates to reheat the water.
5. Manutenção
Regular maintenance ensures the longevity and efficient operation of your TESY BiLight water heater. All maintenance should be performed by a qualified technician.
- Inspeção anual: It is recommended to have the unit inspected annually by a qualified professional. This includes checking the pressure relief valve, expansion vessel, and electrical connections.
- Verificação da haste do ânodo: The glass-lined tank is protected by an anode rod. This rod should be inspected and replaced periodically (typically every 1-3 years, depending on water quality) to prevent corrosion.
- Drenando o tanque: If the unit will be out of use for an extended period or if there is a risk of freezing, the tank should be drained. Consult a professional for proper draining procedures.
- Limpeza: Keep the exterior of the unit clean with a damp pano. Não use produtos de limpeza abrasivos ou solventes.
6. Solução De Problemas
Before attempting any troubleshooting, ensure the power supply to the unit is disconnected. For complex issues, contact a qualified technician.
| Problema | Possível causa | Solução |
|---|---|---|
| Sem água quente | No power supply; tripped circuit breaker; thermostat set too low; heating element failure. | Check power supply and circuit breaker. Adjust thermostat. If problem persists, contact a qualified technician. |
| Água quente insuficiente | Thermostat set too low; high hot water demand; sediment buildup in tank; faulty heating element. | Increase thermostat setting. Allow more recovery time between uses. Consider professional descaling. Contact technician for element check. |
| Água muito quente | Thermostat set too high; faulty thermostat. | Lower thermostat setting. If problem persists, contact a qualified technician to replace the thermostat. |
| Vazamento da unidade | Loose plumbing connections; faulty pressure relief valve; tank corrosion. | Tighten connections. Check pressure relief valve. If tank is corroded, replacement may be necessary. Contact a qualified technician immediately. |
7. Especificações
Technical specifications for the TESY BiLight Electric Hot Water Cylinder 100 Litre model:
| Atributo | Detalhe |
|---|---|
| Marca | TESIA |
| Número do modelo | TESY Electric Water Cylinder |
| Capacidade | 100 litros |
| Dimensões (C x L x A) | 44 x 44 x 99 cm |
| Peso do item (vazio) | 26 kg |
| Volumetage | 220 Volts |
| Cor | Branco |
| Estilo | Electric Un-Vented Vertical Hot Water Cylinder |
| Conexões de água | 15mm (Pipe connections Not Included) |
| Características especiais | Anti-Freezing Protection, Built-in Overheat Protection, Safety Pressure Release Valve, Glass Lined - Corrosion Proof |
| Classificação de eficiência energética | C |
| Primeira data disponível | 13 de março de 2019 |
8. Garantia e Suporte
For warranty information and technical support, please refer to the documentation provided with your purchase or contact TESY customer service directly. Keep your proof of purchase for warranty claims.
For further assistance, you may also contact the seller, The Modern Group, through the Amazon platform.





