This system allows the solar system to provide space heating. Two tanks are loaded from the collector loop, with the hot water tank being loaded preferentially to the heating buffer tank. On the System Definition > (System name), tab Control, the setting DHW-circuit has priority over the auxiliary heating is therefore preset.

A3 - Hot Water System with Heating Buffer Storage

A3.1 - Hot Water System with Heating Buffer Storage and Layer Charging Device

A3.2 - Hot Water System with Heating Buffer Storage and External Heat Exchanger

#	Hydraulic Connection / Components	A3	A3.1	A3.2
1	Auxiliary Heating	x	x	x
2	Stratification		x
3	External Heat Exchanger			x
4	Heating buffer tank	x	x	x
	Same Components
a	Collector Loop	x	x	x
b	Collector Array	x	x	x
c	Dual coil DHW tank	x	x	x
d	DHW Consumption	x	x	x
e	Heating Loop	x	x	x