Baxi SH 7 COMPACT Installation And Service Manual page 17

Fig.14 System 3
S1
S3
R2
S2
Fig.15 System 4
S4
R3
S3
7729335 - 04 - 12052021
Standard solar energy system with an accumulator and auxiliary electric
heating for the SH 7 Compact model.
The solar control compares the temperature difference between the
collector sensor S1 and the accumulator sensor S2. If the temperature
difference is greater than or equal to the preset activation value for the
pump R1, the pump starts up and charges the accumulator until it
reaches either the value for the shutdown difference or the set maximum
accumulator temperature. Once the temperature for S3 reaches the
configured value or falls below it, the electrical resistance heating starts
up and remains active until the set offset temperature has been
reached.
R1
BA-0000067-01
S1
R1
S2
Standard solar power system with heating circuit for the SH 7 Compact
Top model.
The solar system heats a hot water cylinder which serves as a buffer
tank. This buffer tank is used to heat the domestic hot water and
simultaneously transfer heat to the heating circuit return. The assigned
relay is connected when the difference in temperature between the
buffer tank and the return is greater than the connection temperature
difference.
T
R4
5 Before installation
S5
BA-0000089-01
Solar hydraulic unit 17