Combined electric water heater BiLight KOMBI BI 80PK

Product detailed description

Combined electric water heaters are essential in systems where space is limited and energy efficiency is critical. The TESY BiLight KOMBI BI 80PK is commonly used in apartment buildings, small hotels, and office complexes where both central heating and instant hot water are required. Installers often integrate these units into low-pressure heating circuits with standard domestic plumbing infrastructure.

This model supports systems with central heating connections and requires careful consideration of thermal load distribution. The unit’s vertical design allows wall mounting, reducing floor space usage. The right-side connection ensures compatibility with most boiler layouts. Designers should ensure proper pipe routing and insulation to maintain efficiency in cold environments.

Technical parameters

Actual volume	79 L
Power	2000 W
Upper heat exchanger volume	2.1 L
Upper heat exchanger surface area	0.45 m²
Heat exchanger power	13.8 kW
Continuous hot water flow at ΔT 35°C (60-80°C)	329 L/h
Energy efficiency class ERP	C
Voltage	230 V
Current rating	16 A
Height	845 mm
Diameter	440 mm
Depth with bracket	467 mm
Warranty	5 years
Electrical protection	24 IP
Net weight	29.15 kg
Heater design	Round
Mounting type	Vertical wall-mounted
Heating time of heat exchanger Δt=45°C (15-60°C)	0:18 h:min
EAN	3800879120680
Code	303302
Brand	TESY

The 79 L tank volume suits medium-sized households or small commercial facilities. The 2000 W electric element ensures rapid heating, while the 0.45 m² heat exchanger facilitates efficient heat transfer from the central heating system. The 329 L/h flow rate at a 35°C temperature rise is suitable for multiple simultaneous hot water outlets. These parameters are crucial when determining the unit’s capacity to meet peak demand during morning and evening hours.

Installation and connection

Installers should begin by securing the unit vertically using the provided brackets. The 440 mm diameter and 845 mm height require sufficient clearance behind the unit for air circulation. Connections include inlet and outlet ports for the heating circuit and cold water supply. Thread types and sizes should match the system’s existing piping—installers must verify compatibility with the building’s central heating boiler and hot water distribution lines.Compatibility and accessories The TESY BiLight KOMBI BI 80PK is compatible with standard central heating boilers and hot water distribution systems. It integrates well with thermostatic valves and circulation pumps to maintain consistent water temperatures. Additional components such as expansion vessels and safety valves may be required depending on the system configuration. Installers should also consider insulating the connecting pipes to minimize heat loss, especially in unheated areas.

Technical background for designers

The unit operates by transferring heat from the central heating system via a tubular heat exchanger. The 2.1 L upper heat exchanger volume is preheated, ensuring immediate availability of hot water before the stored water is drawn. The TURBOLATOR system enhances turbulence within the heat exchanger, increasing the effective heat transfer rate by up to 26% compared to conventional models. This design reduces the thermal lag typically associated with indirect heating systems. The unit is constructed with high-grade stainless steel for the heat exchanger and durable enamel-coated steel for the tank. These materials resist corrosion and scale buildup under normal operating conditions. Proper integration into the system depends on balancing the heating circuit’s flow rate and temperature to avoid overloading the heat exchanger. Long-term performance is influenced by water hardness and regular maintenance of the central heating system.

Service and operation

Routine checks should include verifying the integrity of the tank insulation, testing the electrical connections for wear, and inspecting the heat exchanger for blockages. The unit is covered by a five-year warranty, excluding damage caused by misuse or poor water quality. No specific service intervals are outlined in the technical documentation, but annual inspections are recommended to maintain efficiency and extend the service life.

Frequently asked questions

Can the TESY BiLight KOMBI BI 80PK be integrated with a condensing boiler?
Yes, the unit is compatible with condensing boilers provided the flow rate and temperature settings align with the heat exchanger specifications.

Does the PISTON EFFECT system require additional components?
No, the system is built-in and does not require external parts to function correctly. It optimizes cold water entry to prevent temperature stratification.

What is the maximum continuous hot water output at 35°C temperature rise?
The unit delivers up to 329 L/h of hot water at a 35°C temperature increase, making it suitable for multiple simultaneous draws.

Is it possible to replace the electric element separately?
Yes, the 2000 W electric element is accessible and can be replaced independently without dismantling the entire unit.

Documents for download

• Technical specification sheet (PDF)
• Installation manual (PDF)
• Warranty terms (PDF)
• Safety instructions (PDF)
• Product certification (PDF)