DHW CylinderuniSTOR exclusive VIH SW 400-500l

Particulary energy-saving hot water cylinder for solar and heat pump systems.

High hot-water comfort for family homes
Perfect combination with solar systems and heat pumps
Efficiency at it’s best - up to 50% less heat loss
Digital display for temperature and system status
High quality made in Germany — built to last
Different capacities for households of 4 to 10 people

Our uniSTOR exclusive VIH SW hot-water cylinders deliver the highest level of comfort and efficiency when combined with Vaillant heat pumps and solar systems. The intelligent technology takes full advantage of free solar energy and the low operating costs of the heat pump when sunlight is limited. With 400 and 500 litres of capacity, they are the ideal solution for single- and two-family homes, ensuring consistent hot-water comfort even during simultaneous use. Thanks to advanced A-rated insulation (A+ to F), heat loss remains extremely low — helping you save energy costs day after day. Made from high-quality materials and protected against corrosion by a maintenance-free impressed current anode, the uniSTOR exclusive VIH SW stands for long-lasting reliability and efficient performance for many years.

Ideal for:

Hot water

Technical data table overline

Technical data table headline

uniSTOR exclusive

VIH SW 500/3 MR

ErP

ErP Energy Efficiency Class Hot Water Storage Tanks	ErP Energy Efficiency Class Hot Water Storage Tanks

uniSTOR exclusive

VIH SW 500/3 MR

Cylinder

Cylinder Nominal Capacity	Cylinder Nominal Capacity	456 l

Heat Exchanger

Heat Exchanger Solar (Heating Area / Heat Exchanger Content)	Heat Exchanger Solar (Heating Area / Heat Exchanger Content)	2,07 m² / 13,5 l
Heat Exchanger Heat Pump (Heating Area / Heat Exchanger Content)	Heat Exchanger Heat Pump (Heating Area / Heat Exchanger Content)	4,42 m² / 28,9 l

Domestic Hot Water

Initial Domestic Hot Water Output (Tcyl = 60 °C) (Draw-off Temperature 45 °C)	Initial Domestic Hot Water Output (Tcyl = 60 °C) (Draw-off Temperature 45 °C)	330 l/10min
Continuous Domestic Hot Water Output (flow = 60 °C) (Draw-off Temperature 45 °C) / Heat Output	Continuous Domestic Hot Water Output (flow = 60 °C) (Draw-off Temperature 45 °C) / Heat Output	1.530 l/h / 62 kW
NL-Figure (Tcyl = 60 °C)	NL-Figure (Tcyl = 60 °C)	2,8

Insulation And Heat Loss

Standby Heat Loss	Standby Heat Loss	1,38 kWh/24h

Connections

Connection Dimension Heating (Flow, Return)	Connection Dimension Heating (Flow, Return)	R ¾″
Connection Dimension Solar (Flow, Return)	Connection Dimension Solar (Flow, Return)	R ¾″
Connection Dimension Cold Water, Domestic Hot Water	Connection Dimension Cold Water, Domestic Hot Water	R ¾″
Connection Dimension Circulation	Connection Dimension Circulation	R ¾″

Dimensions

Height / Width / Depth	Height / Width / Depth	1.933 mm / 850 mm / 930 mm
Height / Width / Depth (Dimension When Positioning)	Height / Width / Depth (Dimension When Positioning)	1.771 mm / 650 mm / 650 mm
Weight	Weight	265 kg
Weight (Dimension When Positioning)	Weight (Dimension When Positioning)	220 kg
Weight Ready for Operation	Weight Ready for Operation	719 kg
Tilt Dimension	Tilt Dimension	2.112 mm

Limitations

Operating Pressure Domestic Hot Water (max)	Operating Pressure Domestic Hot Water (max)	10 bar
Operating Pressure Heating (max)	Operating Pressure Heating (max)	10 bar
Temperature Domestic Hot Water (max)	Temperature Domestic Hot Water (max)	85 °C
Temperature Heating (max)	Temperature Heating (max)	110 °C

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Operating Instructions

uniSTOR exclusive VIH SW 400-500l Operating InstructionVIH SW 500/3 MRPDF (1.48 MB)