Electric water heater TESY BiLIGHT BI 80V

Product detailed description

The TESY BiLIGHT BI 80V is commonly used in residential properties and compact commercial facilities where a reliable and compact electric water heating solution is required. Installers typically integrate this unit into standard domestic plumbing systems, either as a primary hot water source or as a supplementary unit in conjunction with other heating technologies. Its vertical wall-mounted design suits tight spaces such as utility rooms, kitchens and technical areas. The unit operates within standard electrical infrastructure and is compatible with conventional mixing valves and thermostatic controls.

This water heater is particularly suited for environments with medium hot water demand, where rapid recovery after draw-off is essential. The patented Piston Effect cold water inlet system ensures efficient heat retention and minimises stratification within the tank. The unit’s visual status indication allows easy monitoring during operation. It is suitable for installation in dry locations and should be integrated into a properly sized electrical circuit to ensure safe operation and longevity.

Technical parameters

Installation and connection

Mounting the TESY BiLIGHT BI 80V requires a vertical wall mounting bracket and secure fixing points in the installation area. The unit is supplied with a power cord and mounting hardware. Electrical connections must be made via a dedicated 16 A circuit with appropriate protection devices, including a fuse and earth leakage protection. Cold water inlet and hot water outlet connections are typically made using standard 1/2 inch threaded ports, though exact sizes should be verified during installation.

Before commissioning, verify that all electrical and plumbing connections are correctly secured and that the unit is level. Check the safety valve function, ensure proper insulation around the tank, and confirm that the thermostat is set to the desired operating temperature. Common installation errors include incorrect electrical wiring, failure to mount the unit vertically, and neglecting to bleed trapped air from the system prior to operation. Always follow the manufacturer’s guidelines for correct positioning and clearance around the unit to prevent overheating and ensure safe access for maintenance.

Compatibility and accessories

The TESY BiLIGHT BI 80V is compatible with standard domestic hot water systems and can be used in conjunction with thermostatic mixing valves, expansion vessels and pressure-reducing valves. As supplied, it includes a safety valve with non-return function, a power cord and a mounting kit. Additional components such as isolation valves, flow meters and remote thermostats may be required depending on the system configuration and local regulations.

Installers should ensure that any additional piping or control systems are sized correctly to match the unit’s flow rate and pressure requirements. This model does not require an external anode for corrosion protection due to the glass-ceramic enamel lining inside the tank. However, regular inspection of the safety valve and electrical connections is recommended to maintain optimal performance.

Technical background for designers

The TESY BiLIGHT BI 80V operates as a direct electric storage water heater. The heating element is immersed in the tank and controlled by a thermostat with overheat protection. The patented Piston Effect cold water inlet system facilitates efficient mixing of incoming cold water with stored hot water, reducing thermal layering and improving heat distribution within the tank. This design enhances the unit’s ability to deliver consistent hot water temperatures during draw-off cycles.

The tank is constructed from steel with a protective glass-ceramic enamel coating, which provides resistance to corrosion and scaling. The system integrates easily into existing plumbing setups and does not require complex auxiliary equipment. Designers should consider the unit’s nominal volume, thermal output and maximum operating temperature when calculating system demand and ensuring compliance with building regulations. The unit’s compact cylindrical shape and vertical orientation make it ideal for installations with space constraints.

Service and operation

Maintenance of the TESY BiLIGHT BI 80V involves periodic checks of the electrical connections, safety valve and overall tank condition. The manufacturer offers a 5-year warranty covering defects in materials and workmanship. While no routine service intervals are specified, it is advisable to inspect the unit annually for signs of wear, especially around the electrical components and sealing areas.

During operation, ensure that the thermostat is set appropriately and that the unit is not subjected to excessive mechanical stress or vibration. In the event of unusual operation or performance issues, disconnect the power supply and consult the technical documentation. Regular verification of the safety valve function and pressure levels is also recommended to prevent potential failures and ensure continued safe operation.

Frequently asked questions

Can the TESY BiLIGHT BI 80V be used in a recirculation system?
No, the unit is not designed for continuous recirculation and should be used in a standard draw-and-refill system to avoid overheating and excessive energy consumption.

What is the maximum flow rate at 40°C?
At 40°C, the unit can provide up to 145 L of mixed hot water, based on the specified output volume and temperature differential.

Is the TESY BiLIGHT BI 80V suitable for high-altitude installations?
There is no specific limitation for altitude in the provided technical data, but ambient temperature and pressure variations should be considered during installation planning.

Does the TESY BiLIGHT BI 80V require an external anode for corrosion protection?
No, the internal glass-ceramic enamel lining provides sufficient protection against corrosion and does not require an additional sacrificial anode.

Documents for download

• Technical specification (PDF)
• Installation instructions (PDF)
• Safety and operation manual (PDF)
• Warranty information (PDF)
• Product certificate (PDF)
• Dimensions and cut-out details (PDF)