Solar-Compact Boiler Gas, Condensing, Drainback-SystemauroCOMPACT VSC D

Compact power with solar support.

Condensing boiler with integrated solar domestic hot water storage
Energy savings of up to 60% for DHW and up to 20% for heating
As compact as a refrigerator
The sustainable solar drain‑back technology for domestic hot water production
Future‑proof and ready to operate on green gases
Easy control with the free MyVaillant app

The auroCOMPACT compact solar gas unit is a complete package in just 0.41 m². It integrates a gas condensing boiler, a 150‑ or 200‑litre solar hot water tank, and a solar controller. As solar energy heats most of the water free of charge, you will significantly reduce your gas consumption. Meeting legal requirements for renewable energy is simple, as the unit can operate on up to 100% bio‑natural gas or bio‑liquid gas. With outputs of 14 kW and 20 kW, it is ideal for single‑family homes. The high‑efficiency pump, which circulates heating water throughout the house, automatically reduces its output when heat demand is low, cutting electricity consumption. This makes the auroCOMPACT not only efficient but also highly energy‑saving. In addition, the drain‑back solar technology eliminates any risk of overheating or freezing in the solar system, ensuring long‑term performance and durability.

Ideal for:

Heating
Hot water

Technical data table overline

Technical data table headline

auroCOMPACT
VSC D 206/4 -5 190	VSC D 306/4-5 190

ErP

ErP Seasonal Space Heating Efficiency Class	ErP Seasonal Space Heating Efficiency Class
ErP Water Heating Energy Efficiency Class Of Combination Heater	ErP Water Heating Energy Efficiency Class Of Combination Heater
ErP Seasonal Space Heating Energy Efficiency	ErP Seasonal Space Heating Energy Efficiency	92 %	92 %
ErP Water Heating Energy Efficiency	ErP Water Heating Energy Efficiency	85 %	84 %
ErP Energy Efficiency Class Hot Water Storage Tanks	ErP Energy Efficiency Class Hot Water Storage Tanks

auroCOMPACT
VSC D 206/4 -5 190	VSC D 306/4-5 190

Power Output and Efficiency

Heat Output 50/30 °C (G20) (min - max)	Heat Output 50/30 °C (G20) (min - max)	4,3 - 21,5 kW	6,6 - 32,5 kW
Heat Output 80/60 °C (G20) (min - max)	Heat Output 80/60 °C (G20) (min - max)	3,8 - 20,0 kW	5,8 - 30,0 kW
Heat Output (G20) (Domestic Hotwater Mode) (max)	Heat Output (G20) (Domestic Hotwater Mode) (max)	24,0 kW	34,0 kW
Heat Output 50/30 °C (G31) (min - max)	Heat Output 50/30 °C (G31) (min - max)	5,6 - 21,5 kW	9,5 - 32,5 kW
Heat Output 80/60 °C (G31) (min - max)	Heat Output 80/60 °C (G31) (min - max)	5,0 - 20,0 kW	8,5 - 30,0 kW
Heat Output (G31) (Domestic Hotwater Mode) (max)	Heat Output (G31) (Domestic Hotwater Mode) (max)	24,0 kW	34,0 kW
Efficiency (Domestic Hotwater Mode)	Efficiency (Domestic Hotwater Mode)	98 %	98 %
Efficiency (30% acc. to EN 15502)	Efficiency (30% acc. to EN 15502)	108 %	108,0 %
Gas Flow Rate, G20	Gas Flow Rate, G20	2,59 m³/h	3,67 m³/h
Gas Flow Rate, G31	Gas Flow Rate, G31	1,9 kg/h	-

Cylinder

Cylinder Nominal Capacity	Cylinder Nominal Capacity	188 l	188 l

Domestic Hot Water

Continuous Domestic Hot Water Output (Δt = 35 K)	Continuous Domestic Hot Water Output (Δt = 35 K)	591 l/h	837 l/h
Specific Rate D (Δt = 35 K)	Specific Rate D (Δt = 35 K)	20,7 l/10min	24,4 l/min
Initial Domestic Hot Water Output	Initial Domestic Hot Water Output	207 l/10min	244 l/10min
NL-Figure	NL-Figure	2,0	2,7

Insulation And Heat Loss

Standby Heat Loss (of the Cylinder)	Standby Heat Loss (of the Cylinder)	1,91 kWh/24h	1,91 kWh/24h

Electrical Connection

Electrical Power Consumption incl. Pump (standby)	Electrical Power Consumption incl. Pump (standby)	4,2 W	4,2 W
Electrical Power Consumption incl. Pump (max)	Electrical Power Consumption incl. Pump (max)	175 W	175 W
Electrical Voltage Supply	Electrical Voltage Supply	230 V (50 Hz)	230 V (50 Hz)
IP Rating¹	IP Rating¹	IPX4D	IPX4D

Operation Fluids

Amount Of Condensates at 50/30 °C	Amount Of Condensates at 50/30 °C	1,82 l/h	3,09 l/h

Hydraulics

Pump Volume Flow / Remaining pressure head at ΔT=20 K	Pump Volume Flow / Remaining pressure head at ΔT=20 K	861 l/h / 250 mbar	1.292 l/h / 250 mbar
Expansion Vessel Volume	Expansion Vessel Volume	15 l	15 l
Pressure Expansion Vessel	Pressure Expansion Vessel	0,75 bar	0,75 bar

Connections

Connection Dimension Natural Gas	Connection Dimension Natural Gas	G ¾″	G ¾″
Connection Dimension Heating (Flow, Return)	Connection Dimension Heating (Flow, Return)	G ¾″	G ¾″
Connection Dimension Cold Water, Domestic Hot Water	Connection Dimension Cold Water, Domestic Hot Water	G ¾″	G ¾″
Connection Dimension Circulation	Connection Dimension Circulation	G ¾″	G ¾″
Connection Dimension Solar (Flow, Return)	Connection Dimension Solar (Flow, Return)	G ¾″	G ¾″
Connection Dimension Combustion Air, Flue Gas	Connection Dimension Combustion Air, Flue Gas	Ø 60/100 mm	Ø 60/100 mm

Dimensions

Height / Width / Depth	Height / Width / Depth	1.880 mm / 599 mm / 693 mm	1.880 m / 599 mm / 693 mm
Weight	Weight	184 kg	187 kg
Weight Ready for Operation	Weight Ready for Operation	373 kg	377 kg

Limitations

Domestic Hot Water Temperature (min - max)	Domestic Hot Water Temperature (min - max)	35 - 65 °C	35 - 65 °C
Flow Temperature (max)	Flow Temperature (max)	80 °C	80 °C
Operating Pressure Heating (max)	Operating Pressure Heating (max)	3 bar	3 bar
Operating Pressure Solar (max)	Operating Pressure Solar (max)	6 bar	6 bar