Electric water heater TESY BiLIGHT Bi 120V

Product detailed description

Electric storage water heaters are commonly installed in residential buildings, small offices, and commercial premises to provide continuous hot water for showers, sinks and dishwashing. This model is suitable for single-family homes, multi-unit dwellings and service facilities. Installers typically integrate these units into plumbing systems with cold water intake and hot water distribution lines. The unit is compatible with standard electrical infrastructure and requires secure mounting to support its weight and ensure safe operation.

Selection depends on demand, flow rate and system configuration. For example, a 120L capacity suits households with up to four users, assuming average daily consumption. The 2000W heating element ensures rapid recovery times after draw-off, while the IP24 rating provides basic protection against dust and splashing. The vertical orientation and compact dimensions make it suitable for tight spaces such as utility rooms or behind bathroom walls.

Technical parameters

The 120L nominal volume allows for sufficient hot water storage for multiple users. The 2000W power rating means the heater can raise the temperature by 45°C in 3 hours and 8 minutes, which is essential for sizing based on usage patterns. The energy class C indicates moderate efficiency, and the IP24 rating confirms the level of environmental protection. The maximum output at 40°C is 218L, making it suitable for low-temperature applications such as underfloor heating or mixing taps.

Installation and connection

Mounting should be carried out using the provided bracket kit to ensure stability. The tank is designed for vertical wall mounting and requires secure fixing to a load-bearing surface. Cold water enters via the bottom inlet, which must be connected using a 3/4" female thread. The hot water outlet is also located at the top and requires the same thread type. All connections should be checked for tightness and leakage before energising the unit.

Installers should ensure correct electrical wiring according to local regulations. The unit operates at 230V and draws 16A, so a dedicated circuit with appropriate overcurrent protection is required. Grounding must be verified to meet safety standards. A common mistake is neglecting to align the tank vertically during installation, which can affect internal flow dynamics and reduce efficiency. Always confirm the presence of a functioning pressure relief valve and thermal cut-out before commissioning.

Compatibility and accessories

This water heater is compatible with standard plumbing systems and electrical networks. To complete the installation, a pressure relief valve, isolation valves and insulation may need to be added separately. The included power cable and mounting hardware simplify setup. Installers should also consider thermal insulation for the tank and pipes to improve energy efficiency and reduce heat loss in unheated areas.

Technical background for designers

The patented Piston Effect technology enhances cold water intake efficiency by minimising stratification and promoting uniform heating. The steel tank is coated with glass-ceramic enamel to resist corrosion and extend service life. The internal heating element is protected by a thermostat with overheat protection, and the safety valve prevents excessive pressure buildup. The design supports integration into both central and point-of-use hot water systems, depending on layout requirements and user density.

Thermal performance is influenced by ambient temperature and insulation quality. The tank’s cylindrical shape helps optimise heat retention and space utilisation. When designing a system, account for the 1150mm height and 440mm diameter to ensure proper clearance around the unit. For larger demands, multiple units can be operated in parallel or sequential mode, depending on load profiles and peak usage periods.

Service and operation

Periodic inspection of the pressure relief valve and anode rod is recommended to prevent scale buildup and internal corrosion. The unit does not require regular servicing beyond visual checks and functional tests. During routine maintenance, verify that the thermal cut-out operates correctly and that all electrical connections remain secure. If the heater shows signs of reduced performance, such as longer heating times or inconsistent output temperatures, it may indicate scaling or electrical faults that require professional attention.

Frequently asked questions

Can the heater operate with a 3-phase power supply?
No, the heater is designed for single-phase 230V operation only. Connection to three-phase circuits would require additional conversion equipment.

Is it possible to adjust the maximum output temperature?
No, the maximum temperature is fixed at 70°C according to the factory settings. This cannot be modified by the user or installer.

Does the heater support remote monitoring or control?
No, the unit has no built-in communication interface or smart controls. Operation is manual and based on visual indicators only.

What is the expected lifespan of the anode rod?
According to the manufacturer’s specifications, the anode rod should be inspected and replaced periodically, though specific intervals are not stated in the provided data. Corrosion resistance depends on local water hardness and usage frequency.

Documents for download

• Documentation for download (PDF)
• Documentation for download (PDF)
• Documentation for download (PDF)
• Documentation for download (PDF)
• Documentation for download (PDF)
• Documentation for download (PDF)