Resol DeltaSol SL, Manual, Page: 27 / 84

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System 19: Solar system with east-/west collectors and return preheating
The controller compares the temperatures at the collector sensors S1 and S5 to
the store temperature at sensor S2. If one of the measured temperature difference
is higher than the adusted switch-on temperature difference, the corresponding
pump (R1 and / or R2) will be switched on, thus loading the store until either the
switch-off temperature difference or the store maximum 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 (R3).
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 collec-
tor 2 5 / GND
S6 Free S6
Relay
R1 Solar pump collector R1 / N / PE
R2 Solar pump collector 2 R2 / N / PE
R3 Valve solar circuit R3 / N / PE
R4 Free R4 /R4
R2 R1
S5
S3
S2
S1
VBus
VBus
S5/V
40
S4 S3
GND
S6
S7
Sensors Relais
S2 S1
N
R3 R2 R1
L
R4
PW
M
A
0-10
V
PW
M
B
0-10
V
R4
N N N N
R3 R2 R1 L 1 2 3 4 5 6 7 8 9
10 11
2 2 3 3 2 2 2 3 3
R3
S4
Netz
Mains
Flow direction
when normally open