Solar working station operation manual SR881
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screen.
►Press “+” “-” button to adjust minute of time.
►Repress “SET” button, “03 Min” of pump running time
blinks on screen.
►Press “+” “-” button to adjust pump running time
► Press “ESC” to exit this set
► Press “+” button, “tC 3F 22:00”appears, now can set
the third turn-off time.
► Press “SET” button again, “22” of hour time blinks on screen.
►Press “+” “-” button to adjust hour of time.
►Repress “SET” button, “00” of minute time blinks on screen.
►Press “+” “-” button to adjust minute of time.
►Repress “SET” button, “15 Min” of pump stop time blinks on screen.
►Press “+” “-” button to adjust pump stop time
►Press “ESC” to exit this set program, parameters are saved automatically
Description of temperature controlled DHW pump:
Solar system can provide temperature-controlled hot water circulation function; this function
needs an extra hot water circulation pump (connect output port P2) and a sensor, which is
installed on the return pipe of hot water (connect input port T4). When the temperature
signal of sensor T4 is less than the preset turning on temperature of DHW pump, the hot
water circulation pump (P2) triggers and works till the temperature exceeds the turning off
temperature.
Factory set
: the switch-on temperature of temperature controlled DHW pump function is
40
o
C
，
the Switch-off temperature is 45
o
C,
Condition for triggering hot water circulation pump
: only when tank temperature T3 is
2
o
C higher than the required hot water temperature, hot water circulation pump just can be
triggered.
Description of time controlled DHW pump:
DHW pump can also be controlled at the pre-set time sections, this function needs an extra
DHW pump (connect output port P2), this pump will be triggered timing, and within a running
time section, default operation is pump runs for 3 minutes, then stops for 15 minutes, the
process repeats within the time section.
