41
CFR:
Antifreeze temperature
Adjustment range:
-10 ... 10 °C
Factory setting: 4,0 °C
3.1.14 Antifreeze function
OCF:
Antifreeze function
Adjustment range:
OFF / ON
Factory setting: OFF
The antifreeze function activates the loading circuit bet-
ween the collector and the store when the temperature
falls below the adjusted antifreeze temperature. This
will protect the fluid against freezing or coagulating. If
the adjusted antifreeze temperature is exceeded by 1
°C, the loading circuit will be deactivated.
Pleasenote:
Since this function uses the limited heat quantity of
the store, the antifreeze function should be used in
regions with few days of temperatures around the
freezing point.
3.1.16 Tube collector function
If the controller detects an increase in collector
temperature by 2 K compared to the previously stored
collector temperature, the solar pump will be switched-
on at 100 % for about 30 seconds in order to detect the
fluid temperature. The current collector temperature will
be saved as a new reference value. If the measured
temperature (new reference value) is exceeded by 2 K,
the solar pump will run for 30 seconds. If the switch-
on difference between the collector and the store is
exceeded during the runtime of the solar pump or the
standstill of the system, the controller will automatically
switch to solar loading.
If the collector temperature deacreases by 2 K during
standstill, the switch-on value for the tube collector
function will be recalculated.
O TC:
Tube collector function
Adjustment range:
OFF ... ON
Factory setting: OFF
3.1.15 Recooling function
If the adjusted maximum store temperature (SMX) is
reached, the controller keeps the solar pump running
in order to prevent the collector from being overheated.
The store temperature may increase but only up to 95
°C (emergency shutdown of the store).
The solar pump is switched on once the collector
temperature is lower than the store temperature. It
is switched off when the store is cooled down to the
adjusted maximum temperature via the collector and
the pipework.
OREC:
recooling function option
Adjustment range:
OFF ... ON
Factory setting: OFF
3. Control parameters and display channels