22
Settings range R2: daily, weekly, off / Default: see table.
Settings range R3: daily, weekly, off / Default: see table.
Settings range R4: daily, weekly, off / Default: see table.
Settings range R5: daily, weekly, off / Default: see table.
Settings range R6: daily, weekly, off / Default: see table.
Settings range R7: daily, weekly, off / Default: see table.
5.6 Collector alarm
If the temperature registering at the collector sensor exceeds this value when the solar pump is in operation, a warning
or error message will appear in the display.
Collector alarm - Settings range: On, Off / Default: see table.
Collector Tmax - Settings range: 60 °C to 299 °C / Default: see table.
Delay - Settings range: 1 to 60 minutes / Default: see table.
6. SPECIAL FUNCTIONS
Menu “6. Special functions” is used to set basic values
and expanded functions.
b
With the exception of the clock, all settings must be
entrusted solely to expert service technicians.
To quit the menu, press “esc” or select “Exit special func-
tions”.
b
The numbering of the menu items may change from
one system to another.
6.1 Program selection
In questo menù si seleziona e imposta la variante idraulica desiderata per la specifica applicazione.
Intervallo parametri: 1-48 / Default: vedi tabella
b
Normalmente la selezione del programma è fatta una volta solo durante l’avviamento da uno specialista. Un pro-
gramma non corretto potrebbe portare ad errori e danni gravi
b
Se il programma viene cambiato, le impostazioni tornano a quelle di fabbrica.
6.2 Controllo velocità R1
With the speed control provided by the XTDC, the rpm of pumps connected to the unit can be selectively varied.
b
The speed control function should be activated only by an expert service technician. Depending on the pump and
the pump stage used, the minimum speed should not be set too low, otherwise the pump or the system could be
damaged. Always follow the instructions provided by the manufacturer! If in doubt, it is preferable that the minimum
speed and the pump stage should be set conservatively high rather than too low.
6.2.1 Modes
The following speed modes can be set:
Off: no speed control whatever. The connected pump is activated or deactivated at full speed.
Mode M1: following the purge time, the controller activates the maximum speed setting. If the difference in temperature
ΔT between the reference sensors (collector and storage cylinder) is less than the setting, the speed will be reduced by
one stage once the control time has elapsed. In the event that the controller reduces the speed of the pump to the small-
est stage with the ΔT between the reference sensors registering currently at ΔT off, the pump will be shut off.
Mode M2: following the purge time, the controller activates the minimum speed setting. If the difference in temperature
ΔT between the reference sensors (collector and storage cylinder) is greater than the setting, the speed will be increased
by one stage once the control time has elapsed. In the event that the control unit reduces the speed of the pump to the
minimum level with the ΔT between the reference sensors registering currently at ΔT off, the pump will be shut off.
Mode M3: following the purge time, the controller activates the minimum speed setting. If the temperature at the reference
sensor (collector) is higher than the set point to be selected subsequently, the speed will increase by one stage once the
control time has elapsed. If the temperature at the reference sensor (collector) is lower than the set point to be selected
subsequently, the speed will be reduced by one stage once the control time has elapsed.
Mode M4: when the primary storage cylinder is buffering, the speed control operates in M3.
When the secondary storage cylinder is buffering, the speed control operates in M2.
Settings range: M1, M2, M3, M4, Off / Default see table.
6.Special functions
1.Program selection
2.Speed control R1
3.Speed control R2
5.Relay 4
6.Relay 5
OK
Exit special functions
Summary of Contents for SC SUN 300
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