Operation manual of solar controller SR658
Page 67 of 105
►Press “SET” button, “OFF” blinks on the screen
►Press “↑”, “↓” button, to activate the pump delay running function
►Press “SET” or “ESC” button, to confirm the setting
►Press “ESC” button, to return to the previous menu
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13
）
COOL Cooling function
Function description:
Different cooling functions can be activated: system cooling, tank cooling and external
radiator heat transfer.
OSYC System cooling
The system cooling function is designed to keep the solar system operation for a longer time.
The function overrides the maximum tank temperature to transfer the energy from collector
field to the tank. If the tank temperature is higher than its maximum tank temperature already
and the switch-on temperature difference of this function
DTCO
is reached, then the solar
pump remains running. Solar loading is continued until either the temperature difference falls
below the switch-off temperature DTCF or the collector emergency temperature OCEM
reaches
If the system cooling function is running, then icon displays, and icon blinks
on the screen
Note:
This function will only be available when the collector cooling function, external
radiator heat transfer functions are not activated.
OSTC Tank cooling
When the tank cooling function is activated, this function is designed to cool down the tank
during the night and provide possibility for solar loading on the following day. If the maximum
tank temperature SMAX is exceeded, the collector temperature falls below the tank
temperature, and it is below the switch on temperature difference DTCO of this cooling
function, then system will be activated to cool down the tank by releasing the energy through
the collector in night
If the tank cooling function is running, then icon blinks on the screen
Note:
if tank temperature reaches to 95
o
C, all cooling functions will be locked.
Hysteresis switch on temperature difference is 5K.
OHDP external radiator heat transfer
