Arrangement 25: Solar system with east-/west collectors, store loading in layers and thermostatic backup heating
The controller compares the temperatures at the collector sensors S1 and S5 to
the store temperature at sensors S2 and S3. If one of the measured temperature
differences is higher than the adjusted switch-on temperature differences, the cor-
responding pump (R1, R2) or both pumps will be activated and the corresponding
store zone will be loaded up to the adjusted store maximum via the valve (R3). The
priority logic effects prior loading of the upper zone of the store.
DHW backup heating (R4) can be carried out with a thermostat function (S3).
Sensors
S1 Temperature collector 1 1 / GND
S2 Temperature store base 2 / GND
S3 Temperature store top 3 / GND
S4 Free 4 / GND
S5 Temperature collector 2 5 / GND
Relay
R1 Solar pump collector 1 R1 / N / PE
R2 Solar pump collector 2 R2 / N / PE
R3 Solar valve R3 / N / PE
R4 Backup heating / Store
loading pump
R4 /R4
R4
R3
R2R1
S5
S2
S1
Te mp. Sensor
Pt1000
L
R3
R2
R1
GND
S1
S2
S3
S4
S5
VBus
PWM 1
PWM 2
N
R4
V40
VBus
GND
L'
VFS
RPS
S3
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