1.4 Terminal allocation
The controller calculates the temperature difference bet-
ween collector sensor S1 and store 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 R1, and the store will be loaded until the
switch-off temperature difference (DT F) or the maximum
store temperature (S MX) is reached.
S1
R1
S4 / TR
Display Channels
Channel
Description
x*
INIT
ODB initialisation active
x*
FLL
ODB filling time active
STAB
x*
ODB stabilisation in progress
COL
x
Temperature collector
TST
x
Temperature store
S3
x
Temperature sensor 3
TSTT
x*
Temperatur store at the top
S4
x
Temperature sensor 4
TR
x*
Temperature return sensor
n %
x
Pump speed R1
hP
x
Operating hours R1
kWh
x*
Heat quantity kWh
MWh
x*
Heat quantity MWh
|
28
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Sensors S3 and S4 can optionally be connected for mea-
surement purposes. S3 can optionally be used as reference
sensor for the store emergency shutdown option (OSEM).
If heat quantity measurement (OHQM) is activated, sensor
S4 has to be connected as return sensor.
S2
S-Bus
9 10
S3
R1
S4/TR
S1
exemplary
Drainback system layout
S3
S2
Terminal
Page
-
55
-
55
-
55
S1
55
S2
55
S3
55
S3
55
S4
55
S4
55
R1
56
R1
56
-
56
-
56