Storage water heater VIESSMANN Vitocell 100-W CVWB 300 L capacity

The VIESSMANN Vitocell 100-W CVWB storage water heater with 300 L capacity is a cylindrical buffer tank designed for domestic hot water accumulation and delivery. It is intended to work in conjunction with boilers or other heat sources to provide reliable DHW storage and stratified thermal layering. The tank includes connection points for heating and sanitary circuits and is suitable for residential buildings and small commercial installations that require dependable hot water storage and integration with existing heating systems.

Advantages

The storage tank offers efficient thermal stratification to maintain temperature layers, minimizing mixing and improving delivery of hot water at required temperatures. Its 300 L capacity provides substantial stored hot water for domestic use while reducing boiler cycling. The cylinder design and standard hydraulic connections simplify installation and integration with various heating sources. The unit is designed for long-term service in typical domestic and light commercial environments, enabling stable hot water availability and reduced peak load on the heat source.

Suitable for

• Residential houses and multi-family dwellings requiring centralized DHW storage
• Small commercial premises such as offices, guesthouses, or small shops
• Integration with boilers, heat pumps or other heat sources for domestic hot water supply
• Systems where thermal stratification and buffer storage reduce cycling and improve efficiency

Key specifications

• Storage capacity: 300 litres
• Geometry: cylindrical buffer tank designed for vertical installation
• Thermal performance: stratified layering to support temperature separation and efficient DHW draw-off
• Hydraulic features: dedicated connection points for heating and sanitary circuits
• Application: domestic hot water storage compatible with boilers and other heat sources

How to use

Install the Vitocell 100-W CVWB according to the manufacturer’s installation instructions and local codes, connecting the tank to the heat source and the sanitary distribution system via the designated ports. Commission the system by filling the tank, purging air from the circuits, and setting appropriate temperature controls on the boiler or controller. Use the storage tank as part of a closed heating and DHW system, ensuring that safety devices such as pressure relief valves and expansion vessels are fitted and maintained. Periodic inspection of connections and insulation is recommended to maintain performance.

Usage recommendations

For reliable performance, match the Vitocell 100-W CVWB to a compatible heat source sized for the building’s demand, maintain recommended water treatment to prevent corrosion, and follow scheduled maintenance for valves and insulation. Ensure installation by qualified personnel and verify system settings to preserve thermal stratification and maximize storage efficiency.