16
en-US/C
A
The controller compares the temperature at sensor
S1 to the temperatures at sensors S2 and S4. If the
measured temperature differences are higher than the
adjusted switch-on temperature differences, the pump
5
(R1 and/or R2) will be activated and the correspond-
ing tank will be loaded up to the adjusted maximum
temperature. Tank 1 is loaded with priority.
Sensor/
terminal
Designation
Description
S1
TCOL
Temperature collector
S2
TST1B
Temperature tank 1 bottom
S3
TST1T
Temperature tank 1 top
S4
TST2B
Temperature tank 2 bottom
S5
TST2T
Temperature tank 2 top
V40
optional: flowmeter
Relay
Description
R1
Solar pump tank 1
R2
Solar pump tank 2
R3
Heat exchange pump
R4
optional:
Thermal disinfection
Parallel relay
Heat dump
System 4
2-tank solar system with pump logic and heat exchange control
Heat exchange from tank 2 to tank 1 (R3) is possi-
ble with another temperature differential function
(S3 - heat sink / S5 - heat source).
Содержание SCU345
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