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Maximum tank temperature
Once the adjusted maximum temperature is exceeded,
the solar pump is switched off and further loading of the
tank is prevented to reduce scald risk or system damage. A
fixed hysteresis of 4 °Ra [2 K] is set for the maximum tank
temperature.
When the temperature at the corresponding sensor exceeds
the adjusted maximum tank temperature, the
symbol is
shown on the display.
S MX / S1MX / S2MX:
Maximum tank temp.
Adjustment range:
40 ... 200 °F [4 ... 95 °C]
Arr 10:
40 ... 190 °F [4 ... 90 °C]
in steps of 2 °F [1 °C]
Factory setting:140 °F [60 °C]
Note:
If the collector cooling or the system cooling
function is activated, the adjusted tank tempe-
rature may be overridden. In order to prevent
system damage, the controller is also equipped
with a non-adjustable emergency shutdown if the
tank reaches 200 °F [95 °C].
Collector temperature limitation
Emergency shutdown of the collector
If the adjusted collector emergency shutdown temperature
(EM / EM1 / EM2) is exceeded, the controller switches off
the solar pump (R1 / R2) in order to protect the system
against overheating (collector emergency shutdown).
A hysteresis of 20 °Ra [10 K] is set for the collector
temperature limitation. While the collector is in emergency
shutdown, (flashing) is shown on the display.
EM / EM1 / EM2:
Collector temperature limitation
Adjustment range:
170 ... 390 °F
[80 ... 200 °C]
in steps of 2 °F [1 °C]
Factory setting:
270 °F [130 °C]
Note:
If the drainback option ODB is activated,
the adjustment range of EM is changed to
170 ... 250 °F [80 ... 120°C]. The factory setting
in that case is 200 °F [95 °C].
WARNING!
Danger of injury and system da-
mage through pressure surges!
If water is used as a heat transfer
medium in a pressure-less system,
the water will start boiling at 212 °F
[100 °C].
Î
If a pressure-less drainback
system is used with water as a
heat transfer medium, do not
adjust the collector tempera-
ture limitation EM to more
than 200 °F [95 °C]!
Tank emergency shutdown option
This option is used for activating the integrated tank
emergency shutdown for an upper tank sensor. If the
temperature at the reference sensor exceeds 200 °F [95 °C],
tank 1 will be blocked and loading will be stopped until the
temperature falls below 190 °F [90 °C].
OSEM
Tank emergency shutdown
option
Adjustment range: OFF / ON
Factory setting: OFF
Note:
Sensor S3 ist used as the reference sensor in
the system layouts 1, 2, 3, 8, 9 and 10. In the
system layouts 6 and 7, sensor S4 is used as the
reference sensor.
This option is not available in system layouts
4 and 5.