© Caleffi 11236_iSolar_Plus.mon
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VBus
System layout 7
The controller calculates the temperature differences
between the collector sensors S1 and S3 and the tank
sensor S2. If the differences are larger than or identical to
the adjusted switch-on temperature difference (DT O), the
respective solar pump will be operated by relay 1 and / or
relay 2, and the tank will be loaded until the switch-off
R1
R2
S1
S2
S3
Arr 7
Display Channels
Channel
Description
Terminal
Page
COL1
x
Temperature collector 1
S1
37
TST
x
Temperature tank
S2
37
COL2
x
Temperature collector 2
S3
37
S4
x
Temperature sensor 4
S4
37
TSTT
x*
Temperature store at the top
S4
37
n1 %
x
Pump speed R1
R1
38
n2 %
x
Pump speed R2
R2
38
h P1
x
Operating hours R1
R1
38
h P2
x
Operating hours R2
R2
38
TIME
x
Time
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temperature difference (DT F) or the maximum tank tem-
perature (S MX) is reached.
Sensor S4 can optionally be connected for measurement
purposes or used as reference sensor for the tank emer-
gency shutdown option (OSEM).