1. Pwodwi souview
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.
Karakteristik kle yo enkli:
- 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 sit
- Light Indicator to show heating status
- Equipped with a Safety Temperature Pressure Valve
- Thermal Load Temperature Safety Cut Out for enhanced safety

Figi 1: Devan view of the TESY BiLight Electric Hot Water Cylinder, showing the main unit and indicator panel.
2. Enfòmasyon sou Sekirite
Enpòtan: 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.
- Toujou dekonekte kouran an anvan ou fè nenpòt antretyen oswa enstalasyon.
- Ensure proper grounding of the electrical connection.
- Do not operate the unit if any part is damaged or if there are signs of leakage.
- Kenbe materyèl ki ka pran dife lwen aparèy chofaj dlo a.
- Asire w ke gen ase vantilasyon toutotou inite a.
3. Enstalasyon (Enstalasyon)
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. Seleksyon Sit
- 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.
- Pwoteje inite a kont tanperati konjelasyon.
3.2. Monte inite a
- 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. Koneksyon plonbri
- 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.
- Asire w tout koneksyon yo pa kite dlo pase.
3.4. Koneksyon elektrik
- 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.

Figi 2: Detaye views of the TESY BiLight water heater, showing the bottom connections, temperature control dial, and wall mounting bracket.
4. Operasyon
Once installed and filled with water, the TESY BiLight water heater is designed for straightforward operation.
4.1. Inisyal Start-up
- 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. Kontwòl Tanperati
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. Operasyon nòmal
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. Antretyen
Regular maintenance ensures the longevity and efficient operation of your TESY BiLight water heater. All maintenance should be performed by a qualified technician.
- Enspeksyon anyèl: 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.
- Tcheke baton anod: 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.
- Vide tank la: 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.
- Netwayaj: Keep the exterior of the unit clean with a damp twal. Pa sèvi ak pwodui netwayaj abrazif oswa solvang.
NAN. Depanaj
Before attempting any troubleshooting, ensure the power supply to the unit is disconnected. For complex issues, contact a qualified technician.
| Pwoblèm | Kòz posib | Solisyon |
|---|---|---|
| Pa gen dlo cho | 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. |
| Ensifizan dlo cho | 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. |
| Dlo twò cho | Thermostat set too high; faulty thermostat. | Lower thermostat setting. If problem persists, contact a qualified technician to replace the thermostat. |
| Koule nan inite a | 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. Espesifikasyon
Technical specifications for the TESY BiLight Electric Hot Water Cylinder 100 Litre model:
| Atribi | Detay |
|---|---|
| Mak | TESY |
| Nimewo Modèl | TESY Electric Water Cylinder |
| Kapasite | 100 lit |
| Dimansyon (L x W x H) | 44 x 44 x 99 cm |
| Pwa Atik (vid) | 26 kg |
| Voltage | 220 Volts |
| Koulè | Blan |
| Style | Electric Un-Vented Vertical Hot Water Cylinder |
| Koneksyon dlo | 15mm (Pipe connections Not Included) |
| Karakteristik espesyal | Anti-Freezing Protection, Built-in Overheat Protection, Safety Pressure Release Valve, Glass Lined - Corrosion Proof |
| Evalyasyon efikasite enèji | C |
| Premye Dat ki disponib | 13 mas 2019 |
8. Garanti ak sipò
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.





