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InstallationIndications, functions and optionsMessages Commissioning Operation and function
System 9: Solar system with 1 store and return preheating
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.
With another temperature differential function (S3 heat source / S4 heat sink) re-
turn preheating (heating circuit backup) is possible via another valve (R2).
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 Free 5 / GND
Relay
R1 Solar pump R1 / N / PE
R2 Valve
return preheating
R2 / N / PE
R3 Free R3 / N / PE
R4 Free R4 / N / PE
R2
R1
S4
S3
S2
S1
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