KBW combined storage tank – thermal buffer tank with integrated hygienic DHW reservoir
The KBW series tanks are a combination of the B and BW series tanks. KBW tanks are “2-in-1” units, available in 55-liter capacity, designed for domestic hot water (DHW) preparation.
They are dedicated to:
- AIRKOMPAKT heat pumps with 7, 9, and 11 kW output
- Any AIRADAPT inverter pump
- Mixed systems combining a heat pump with another heat source, e.g., KOŁTON + KOŁTON pellet boiler, and others
The upper part of the tank is a BW tank for DHW purposes, while the lower part serves as a buffer for central heating (C.O.). In high-temperature installations, KBW tanks can also be used as multi-valent tanks, combining a central heating buffer with a DHW tank via a stainless steel coil.
Key Features and Applications
KBW series tanks are designed to work with a wide variety of heat sources, including:
- Heat pumps
- Pellet boilers
- Gas boilers
- Electric heaters
They are suitable for complex and large-scale installations, where they can also act as a hydraulic separator.
Standout features include:
- High-performance thermal insulation
- Two connections for electric heaters (front or rear installation)
- Flow directors ensuring proper thermal stratification within the tank
- Factory-integrated solution allowing connection of up to 12 temperature sensors at 4 different heights
These features make KBW tanks versatile, reliable, and highly efficient for advanced heating systems.
KBW tanks operate on the principle of a flow-through water heater.
Thermal energy is stored in the water circulating in the central heating system.
Mains water (domestic hot water) flows directly to the tap through a stainless steel, corrugated coil with a large heat exchange surface, heating up to the temperature maintained in the tank.
An innovative solution in KBW tanks is the use of specially designed flow directors for the heating water. These directors induce a vortex movement of the heating water from the top of the tank, minimizing vertical water movement inside the tank.
This solution ensures optimal stratification of water temperature in the tank from top to bottom. It minimizes water mixing in the tank, which positively affects the efficiency of heat pumps, reduces the number of tank heating cycles by the heat pump, and ensures maximum performance.
Tank without flow directors / Tank with standard flow director
Tank with proprietary flow director developed by KOŁTON
An innovative solution in KOŁTON brand tanks is the use of specially designed heating water flow directors. These directors create a vortex movement of the heating water from the top of the tank, minimizing vertical water movement inside the tank. This solution ensures the best possible stratification of water temperature in the tank from top to bottom. It minimizes water mixing in the tank, which positively affects the efficiency of heat pumps, reduces the number of tank heating cycles by the heat pump, and ensures maximum performance.
FLOW DIRECTORS
Thanks to computer modeling, we have demonstrated that our proposed flow directors allow better water stratification than ordinary buffers without directors or with standard top-mounted directors.
- Temperature stratification
- No vertical mixing
- Maximum efficiency in heat pump systems
Operating conditions
- KBW tanks operate at temperatures up to 85˚C (when supplied by a pellet boiler) and at a maximum operating pressure of 3 bar in the central heating (C.O.) system. The pressure of domestic water flowing through the coil is a maximum of 6 bar.
Parameters
300/230Zbiornik
Dimensions
550Wymiar
Special Features
- The stainless steel coil has a corrugated wall, increasing the heat exchange surface and inducing turbulent water flow for better efficiency.
- The smooth surface structure of the stainless steel coil prevents scale buildup and reduces heat transfer resistance.
- The corrugated coil construction exhibits elastic properties, which, during dynamic pressure changes caused by opening and closing taps, causes coil vibrations and further improves self-cleaning from deposits.
- Due to the high turbulence of flow in the coil and the short domestic hot water heating time, the possibility of water stagnation and bacterial growth, including Legionella, is eliminated.
- The tank has 12 sensor ports at 4 different heights, eliminating the problem of insufficient space for temperature sensors from additional heat sources or controllers.
- The special design of the flow directors ensures water stratification and minimizes mixing in the tank.
- The tank has 10 connection ports for heat sources and receivers.
- Insulation with a special mat provides excellent thermal properties, and the outer insulation is removable, facilitating transport in narrow spaces.
Warranty conditions
KOŁTON Sp. K., headquartered in Jabłonka, ul. Sosnowa 2, 34-480 Jabłonka, as the manufacturer of water tanks series B, BW, BWS, KBW, grants the buyer a product quality warranty for a period of 36 months from the date of sale.
The buyer is obliged to:
- Entrust the installation of the device to a qualified installer;
- Strictly follow the operating and installation instructions;
- Notify the factory service of any defect in the device within 7 days of its detection.
Failure to comply with the above obligations will result in the loss of warranty.
In the event of a defect or malfunction, the manufacturer decides on its repair or replacement.
The warranty covers only defects arising from causes inherent in the device itself.
Warranty repairs are free of charge.
The manufacturer will carry out warranty obligations without delay, after reporting the defect to an authorized service point, but within no longer than 30 days. Warranty service requires possession of this warranty card and proof of purchase.
The manufacturer may refuse warranty service if there is no free access to the device being claimed.
The warranty applies only to products purchased and used in the territory of Poland.
The granted warranty does not exclude or limit the buyer’s rights under the statutory liability for physical defects.
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