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System 7
Solar system with vertical tank loading and 2nd tank
The controller compares the temperature at sensor
S1 to the temperatures at sensors S2, S3 and S4. If
the measured temperature differences are higher than
the adjusted switch-on temperature differences, the
pump (R1) will be activated (see speed control) and
Ventillogik
the corresponding tank or tank zone will be loaded up
to the adjusted maximum temperature via the valves
(R3, R4). Depending on the valve type used, the cor-
responding valve logic has to be selected.
Ventillogik
1
2
1
3
Note
A solar system with vertical tank loading is
implemented as a 2-tank system. (tank bot-
tom = tank 1; tank top = tank 2; additional
tank = tank 3)
Sensor/
Designation Description
terminal
S1
TCOL
Temperature collector
S2
TST1B
Temperature tank 1 bottom
(tank 1)
S3
TSTT
Temperature tank 1 top (tank 2)
S4
TST2B
Temperature tank 2 bottom
(tank 3)
S5
Optional sensor for measure-
ment purposes or options
V40
Relay
Description
R1
Solar pump tank 1
R2
optional:
Thermal disinfection
Parallel relay
Heat dump
R3
Valve tank 1, 2 / 3
R4
Valve tank 2 / 3
Valve logic
Ventillogik
1
2
3
4
Flow direction when the
Durchflussrichtung
valve is normally open
im stromlosen Zustand
Durchflussr
im stromlo
25
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