STIEBEL ELTRON SOM 7 PLUS, Operation And Installation

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12
R2
S1
S2
R1
S3
S4 / TR
System layout 3
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 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 operates
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
relay 2 for backup heating or heat dump purposes, when
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 sensor
for the thermal disinfection function OTD.
Sensor S4 can optionally be connected for measurement
purposes. If energy metering (OHQM) is activated, sensor S4
has to be connected as return sensor.