System 10: Solar system with 1 store, return preheating and thermostatic afterheating
The controller calculates the temperature difference between collector sensor
S1 and store sensor S2. If the difference is larger than or identical to the adjusted
switch-on temperature difference, the pump (R1) will be switched on and the
store will be loaded until the switch-off temperature difference or the maximum
store temperature is reached.
Afterheating (R3 and R4) can be carried out with a thermostat function (S5). If the
value at S5 reaches the switch-on temperature for the afterheating, the relay is
switched on. If the value exceeds the switch-off temperature for the afterheating,
the relay is switched off again.
With another temperature differential function (S3 heat source/S4 heat sink)
re-
turn preheating (heating circuit backup) is possible via another valve (R2).
Hydraulic variant 1
Hydraulic variant 2
Sensors
S1 Temperature collector 1 / GND
S2 Temperature store
base
2 / GND
S3 Temperature store
return preheating
3 / GND
S4 Temperature
heating return
4 / GND
S5 Temperature
afterheating
5 / GND
S6 Free S6
Relay
R1 Solar pump R1 / N / PE
R2 Valve return preheating R2 / N / PE
R3 Store loading pump R3 / N / PE
R4 Afterheating R4 / R4
S4
R3
R2
R4
R1
S3
S2
S1
S5
VBus
VBus
S5/V40
S4
S3
GND
S6
S7
Sensors
Relais
S2
S1
N
R3
R2
R1
L
R4
PWM A
0-10 V
PWM B
0-10 V
R4
N N N N
R3 R2 R1 L
1234
56789
10 11
2
332
2 2
3
3
2 2
Net
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