6
S1
S2
S4 / TR
The controller calculates the temperature difference between
collector sensor S1 and tank sensor S2. If the difference is
larger than or identical to the adjusted switch - on temperature
difference (DT O), the solar pump will be operated by R1,
and the tank will be loaded until the switch-off temperature
difference (DT F) or the maximum tank temperature (S MX)
is reached.
R1
S3
1.4 Terminal allocation
Display Channels
Channel
Description
Terminal
Page
INIT
x*
ODB initialization active
-
12
FLL
x*
ODB filling time active
-
12
STAB
x*
ODB stabilization in progress
-
12
COL
x
Temperature collector
S1
12
TST
x
Temperature tank
S2
12
S3
x
Temperature sensor 3
S3
12
S4
x
Temperature sensor 4
S4
12
TR
x*
Temperature return sensor
S4
12
n %
x
Pump speed R1
R1
13
hP
x
Operating hours R1
R1
13
kWh
x*
Heat quantity kWh
-
13
MWh
x*
Heat quantity MWh
-
13
Sensors S3 and S4 can optionally be connected for
measurement purposes.
If energy metering (OHQM) is activated, sensor S4 has to be
connected as return sensor.
S1
S3
S2
S4/TR
R1
exemplary
Drainback system layout
