en
17
Installation
Indications,
functions and options
Messages
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
Durchflussrichtung
im stromlosen Zustand
Temp. Sensor
Pt1000
L
R3
R2
R1
GND
S1
S2
S3
S4
S5
VBus
PW
M
1
PW
M
2
N
R4
V40
VBus GN
D
L'
VFS
RPS
Flow direction when
normally open