© Caleffi 11236_iSolar_Plus.mon
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12
VBus
9 10
R2
S1
S2
R1
S3
S4 / TR
System layout 3
The controller calculates the temperature difference bet-
ween collector sensor S1 and tank sensor S2. If the diffe-
rence is larger than or identical to the adjusted switch-on
temperature difference (DT O), the solar pump will be
operated by relay 1, and the tank will be loaded until the
switch-off temperature difference (DT F) or the maximum
tank temperature (S MX) is reached.
Sensor S3 is used for a thermostatic function, which ope-
rates relay 2 for afterheating or heat dump purposes, when
Arr 3
Display Channels
Channel
Description
Terminal
Page
INIT
x*
ODB initialization active
-
37
FLL
x*
ODB filling time active
-
37
STAB
x*
ODB stabilization in progress
-
37
COL
x
Temperature collector
S1
37
TSTB
x
Temperature tank 1 bottom
S2
37
TSTT
x
Temperature tank 1 at the top
S3
37
TDIS
s*
Thermal disinfection temperature
S3
37
S4
x
Temperature sensor 4
S4
37
TR
x*
Temperature return sensor
S4
37
n1 %
x
Pump speed R1
R1
38
h P1
x
Operating hours R1
R1
38
h P2
x
Operating hours R2
R2
38
kWh
x*
Heat quantity kWh
-
38
MWh
x*
Heat quantity MWh
-
38
CDIS
s*
Countdown of monitoring period
-
38
SDIS
s*
Starting time display
-
38
DDIS
s*
Heating period display
-
38
TIME
x
Time
-
34
the adjusted thermostat switch-on temperature (AH O) is
reached. This function can optionally be combined with up
to three adjustable time frames.
Sensor S3 can also be optionally used as a reference sen-
sor for the thermal disinfection function OTD or the tank
emergency shutdown option (OSEM).
Sensor S4 can optionally be connected for measurement
purposes. If heat quantity measurement (OHQM) is activa-
ted, sensor S4 has to be connected as return sensor.
