Heat pump combination storage WK

Heat pump combination storage tank WK – Innovative 2-in-1 storage tank for heating and domestic hot water

Structure and functional principle

The WK combo storage tank combines two storage functions in a compact housing. The upper section heats fresh water hygienically using a stainless steel corrugated pipe, while the lower section serves as a buffer for the heating water circuit. The innovative stratified channel clearly separates temperature zones and minimizes heat loss.

This design allows for simultaneous hot water preparation and heating or cooling. In summer, the heat pump uses the buffer zone to actively cool the underfloor heating, while hot water continues to be provided comfortably and safely.

Hygienic fresh water heating using the flow-through principle

The Hot water preparation The system operates on a flow-through principle, ensuring a constant supply of fresh, microbiologically safe water. The stainless steel corrugated pipe offers high corrosion resistance and a long service life.

Since the water is only heated when needed, no stagnant water is stored. This increases protection against Legionella growth and reduces energy consumption in standby mode.

Buffer storage for heating and cooling

Heating water is temporarily stored in the lower storage tank. Thanks to its generous buffer capacity, the combination storage tank relieves the heat pump during fluctuating loads and increases its service life. At the same time, temperature fluctuations in the heating system can be compensated for.

In summer, the heat pump can operate conversely as a chiller. The buffer zone then serves as a heat dissipation point to efficiently cool underfloor heating systems – without any additional components.

Isolation and transport

The storage unit is equipped with 100 mm of EPS insulation and encased in a silver-gray plastic jacket. This minimizes temperature losses and minimizes the loss of energy to the environment from the base of the unit.

Both storage units can be disassembled and transported separately if necessary. This significantly simplifies installation in confined basements or areas with difficult access.

Technical data at a glance

The combination storage tank is available in two sizes: WK 600 with a 420-liter buffer capacity and a 200-liter fresh water compartment, and WK 800 with a 550-liter buffer capacity and a 300-liter fresh water compartment. Two sockets for heating elements (1 1/2") each allow for electric reheating or booster operation.

The clear separation of the volumetric compartments allows for large temperature differences between the hot water and buffer sections. This enables maximum flexibility and efficiency in every operating phase.

Installation and maintenance

The connections for fresh water, heating, and electric reheating elements are clearly arranged and easily accessible. Standard connections facilitate connection to common heat pump systems and heating manifolds.

Maintenance work is mainly limited to inspecting the seals and checking the insulation. If necessary, both halves of the storage tank can be removed separately and inspected or replaced individually.

Application scenarios

Ideal for single-family homes, multi-family dwellings, or commercial properties that require an efficient combination of hot water, heating support, and cooling. The storage tank can also be easily used in combination with solar thermal energy.

Thanks to its modular design and flexible installation options, the WK combi storage tank can be integrated into virtually any existing or new heat pump system. Operators benefit from minimal space requirements and significant savings potential.

Conclusion

The Heat pump combination storage WK offers a perfect solution for modern heating and cooling concepts. With its 2-in-1 design, efficient stratified duct, and robust insulation, it ensures maximum comfort and minimal operating costs.

Whether new construction or retrofitting – with the WK combi storage tank you meet all requirements for sustainable and future-proof heating and cooling technology.

Technical details WK600

• Net capacity of hot water: 420 liters
• Net capacity of buffer tank: 200 liters
• Diameter without insulation: 700 mm
• Diameter with PU insulation: 1,000 mm
• Energy efficiency class insulation: A
• Height with insulation: 1,930 mm
• Tilting dimension without insulation: 1,960 mm
• Performance indicator NL: 1.6
• Capacity: 220
• Heating surface stainless steel corrugated pipe: 12.0 m²
• Connections: 4 x 1/2" 2 x 1 1/2" & 1 x 1 1/4"
• Max. operating pressure of the container: 5 bar
• Max operating pressure stainless steel corrugated pipe: 10 bar
• Max. operating temperature: 95 °C

Technical details WK800

• Net capacity of hot water: 550 liters
• Net capacity of buffer tank: 300 liters
• Diameter without insulation: 790 mm
• Diameter with PU insulation: 1,100 mm
• Energy efficiency class insulation: A
• Height with insulation: 2,050 mm
• Tilting dimension without insulation: 2,080 mm
• Performance indicator NL: 1.8
• Capacity: 310
• Heating surface stainless steel corrugated pipe: 12.0 m²
• Connections: 4 x 1/2" 2 x 1 1/2" & 1 x 1 1/4"
• Max. operating pressure of the container: 5 bar
• Max operating pressure stainless steel corrugated pipe: 10 bar
• Max. operating temperature: 95 °C

Scope of delivery

• 1 x Heat pump combination storage
• Assembly and operating instructions

Download

• Data sheet