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InstallationIndications, functions and optionsMessages Commissioning Operation and function
nMX
Maximum speed
Adjustment range: (10) 30 … 100 %
Factory setting: 100 %
In the adjustment channel nMX, a relative maximum speed for a pump connected
can be allocated to the output R1.
Note
The pump speed must be set to 100 % when auxiliary relays or valves are
connected.
Maximum store temperature
S MX
Maximum store temperature
Adjustment range: 4 … 95 °C [40 … 200 °F]
Arr 10: 4 … 90 °C [40 … 190 °F]
Factory setting: 60 °C [140 °F]
If the store temperature reaches the adjusted maximum temperature, the store will
no longer be loaded in order to avoid damage caused by overheating. A non-adjust-
able hysteresis of 2 K [4 °Ra] is set for the maximum store temperature.
If the maximum store temperature is exceeded, ☼ is displayed.
Note
If the collector cooling or the system cooling function is activated, the
adjusted maximum store temperature may be exceeded. In order to pre-
vent system damage, the controller is also equipped with an integrated
store emergency shutdown, deactivating the system if the store reaches
95 °C [200 °F].
Store emergency shutdown
OSEM
Store emergency shutdown option
Adjustment range: ON, OFF
Factory setting: OFF
This option is used for activating the internal store emergency shutdown for an up-
per store sensor. If the temperature at the reference sensor exceeds 95 °C, store 1
will be blocked and loading will be stopped until the temperature falls below 90 °C.
Note
Sensor S3 ist used as the reference sensor.
Collector limit temperature
Collector emergency shutdown
EM
Collector limit temperature
Adjustment range: 80 … 200 °C [170 … 390 °F]
Factory setting: 130 °C [270 °F]
When the collector temperature exceeds the adjusted collector limit tempera-
ture, the solar pump (R1) switches off in order to protect the system components
against overheating (collector emergency shutdown). If the collector limit temper-
ature is exceeded, ⚠ is displayed.
Note
If the drainback option ODB is activated, the adjustment range of EM will
change to 80 … 120 °C [170 … 250 °F]. The factory setting in that case is
95 °C [200 °F].
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