Caleffi solar iSolar 2 Manuale - Pagina 15
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Stampa la pagina4.1.14 Recooling function
OREC:
recooling function option
Adjustment range:
OFF ... ON
Factory setting: OFF
4.1.15 Tube collector function
O TC:
Tube collector function
Adjustment range:
OFF ... ON
Factory setting: OFF
If the adjusted maximum tank temperature (S MX) is
reached, the controller keeps the solar pump running in
order to prevent the collector from being overheated.
The tank temperature may increase but only up to 203 °F
(emergency shutdown of the tank).
The solar pump is switched on once the collector
temperature is lower than the tank temperature. It is
switched off when the tank is cooled down to the adjusted
maximum temperature via the collector and the pipework.
If the controller detects an increase in collector temperature
by 4 °Ra 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 4 °Ra, the solar pump
will run for 30 seconds. If the switch-on difference between
the collector and the tank 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 4 °Ra during
standstill, the switch-on value for the tube collector function
will be recalculated.
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