ETWS 100-liter hot water storage tank – Central domestic hot water storage tank with integrated heat exchanger

Product description

The ETWS hot water storage tank with a 100-liter capacity provides reliable and centralized heating of domestic hot water for households and small businesses. A highly efficient internal heat exchanger transfers thermal energy from a solar thermal system or a boiler to the drinking water, thus ensuring a continuous supply of hot water.

For retrofitting, a connection for a 1 1/2" An electric heating element is available, allowing the system to be easily combined with photovoltaic or electric supplementary heating. The compact design with high-quality thermal insulation ensures low heat loss and high operational reliability.

Advantages

The storage tank offers excellent value for money and a high level of hot water comfort for a demand of approximately 100 to 180 liters. Its versatility and compatibility with solid fuel, pellet, or solar thermal systems make it ideal for modern heating systems.

Further advantages include the integrated circulation connection, the large magnesium sacrificial anode for additional corrosion protection, and the tightly foamed polyurethane thermal insulation, which minimizes energy losses. The highly efficient heat exchanger and robust construction ensure stable operation over the long term.

Technical data

Volume: 100 liters; Heat exchanger surface area: 1.2 m²; Heat exchanger capacity: 5.27 liters. Connections: Heating flow/return 3/4" AG, Supply/Return Domestic Water 3/4" AG, Circulation 3/4" AG; Magnesium anode connection 1 1/4" IG; Connection for electric heating 1 1/2" IG.

Thermal insulation: polyurethane foam (PUR); Max. operating temperature storage tank 95 °C; Max. operating pressure storage tank/heat exchanger 6 bar; Max. operating temperature heat exchanger 100 °C; Loss: 28 W. Dimensions (Ø x H) incl. insulation: 625 x 770 mm; Weight empty: 64 kg.

Assembly && Connection

The hot water storage tank is designed for connection to boilers, solar thermal systems, and combination boilers. The standardized connection threads simplify installation; when connecting, note the positions of the flow, return, and circulation pipes, as well as the designated opening for an electric heating element.

For professional installation, collaboration with a heating engineer is recommended, especially when integrating into existing systems and for electrical retrofitting. Seals and proper fastening are essential to prevent leaks.

Corrosion protection && Lifespan

The storage tank features a high-quality enamel inner coating that protects the drinking water from contact corrosion. Additionally, a large magnesium sacrificial anode provides active corrosion protection and significantly extends the tank's lifespan.

OWR1 Heating Element 2 kW – Electric heating element for domestic hot water storage tanks

Product description

The OWR1 heating element with 2 kW output is a compact, robust electric heating element for use in domestic hot water storage tanks, boilers, and buffer tanks. It operates at 230 V and has a standardized 1 1/" connection thread.2" equipped.

The horizontal installation design and the 360 ​​mm installation length allow for flexible application options. An externally mounted control enables convenient setting of the target temperature, and the heating element is supplied with a Schuko plug, so no additional adapter is required.

Technical data

Power: 2.0 kW; Voltage: 230 V; Connection thread: 1 1/2" AG; Installation length: 360 mm; Installation type: horizontal; Regulator adjustable from approx. 20 °C to approx.70 °C; Safety temperature limiter: 85 °C.

Installation && Assembly

The heating element can be quickly installed using the standardized thread. Before installation, the appliance and storage tank must be disconnected from the power supply, and the installation opening must be cleaned. Proper sealing of the thread is essential to prevent leaks.

If there is any uncertainty, the installation should be carried out by a qualified electrician or heating installer, especially to ensure correct electrical connections and grounding.

Security && Operation

The integrated safety temperature limiter at 85 °C protects against overheating. The stepless adjustment via the external control allows temperatures from approximately 20 °C to 70 °C for everyday operation. Always disconnect the power supply before performing any maintenance work.

Areas of application && Advantages

The OWR1 is ideally suited as an auxiliary heater for small to medium-sized storage tanks, as a retrofit solution in existing systems, or as a replacement heating element. Its advantages include easy installation, compact design, and stepless temperature control, which allows for use even in confined spaces.

Care && Maintenance

Regular visual inspections for corrosion and leaks extend the service life. Limescale deposits can impair heating performance; in areas with hard water, appropriate measures to minimize limescale buildup are recommended. Electrical tests should be carried out at defined intervals by a qualified electrician.

Scope of delivery && Compatibility

The OWR1 heating element comes with an installation and operating manual, and a Schuko plug. Before purchasing, please check the installation length, installation type (horizontal), and connection thread to ensure compatibility with your storage tank. Our customer service team is happy to assist you with any questions.

Technical data

Technical data for hot water storage tanks

• Volume: 100 liters
• Heat exchanger surface area: 1.2 m²
• Heat exchanger capacity: 5.27 liters
• Heating flow and return connections: 3/4" AG
• Domestic hot water supply and return connections: 3/4" AG
• Circulation connection: 3/4" AG
• Magnesium anode connection: 1 1/4" IG
• Connection for electric heating: 1 1/2" IG
• Thermal insulation: Polyurethane foam (PUR)
• Max. operating temperature storage 95 °C
• Maximum operating pressure of storage tank/heat exchanger: 6 bar
• Max. operating temperature heat exchanger 100 °C
• Loss: 28 watts
• Dimensions with insulation (diameter x height): 625 x 770 mm
• Weight (empty): 64 kg

Technical data heating element

• External regulator from ~20°C until ~ approx. 70°C adjustable
• Connection thread: 1 1/2" AG
• Installation type: horizontal.
• Safety temperature limiter: 85°C
• Power: 2.0 kW
• Power supply: 230V
• Installation length: 360 mm
• Easy handling and assembly
• with Schuko plug

Scope of delivery

• Drinking water storage tank 100 liters
• Heating element 2 kW with 1 1/2" AG
• Operating instructions && Assembly instructions

Download

• Operating instructions for hot water storage tank