en-US/C
A
7
2.6
System layouts
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 (R1) will be activated and the corresponding
tank will be loaded up to the adjusted maximum
temperature via the valve (R3). Tank 1 is loaded with
priority.
System 1
2-tank system with valve logic, 1 pump, 3 sensors and 3-port valve
Note: 3-port valve normally open - tank 1 (S2)
Sensor/
terminal
Designation
Description
S1
TCOL
Temperature collector
S2
TST1B
Temperature tank 1 bottom
S3
Optional sensor for measure-
ment purposes or options
S4
TST2B
Temperature tank 2 bottom
S5
Optional sensor for measure-
ment purposes or options
V40
Relay
Description
R1
Solar pump
R2/R4
optional:
Thermal disinfection
Parallel relay
Heat dump
R3
3-port valve tank 1/2
Summary of Contents for SCU345
Page 71: ...en US CA 71 Notes ...
