SR971,SR972 Solar station operation manual
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►Press“SET”button again, “00”of minute area blinks
► Press button to adjust minute
► Repress “SET”button to shift to temperature area, “55℃”blinks
► Press button, to adjust switch- off temperature.
►Press “ESC” button to exit submenu or wait for 20 seconds to exit setup , parameters are
saved automatically
Note: when no gas or oil boiler is installed in system, electrical heater can be installed as
back-up device, then, heating symbol displays on the screen. when electrical heater is
in operation status, symbol blinks on screen.
If customer use electrical heater as back-up, please according to the power of electrical
heater to equip corresponding safety devices like contactor and breaker with this controller,
we strongly recommend equipping with SR802 device with this controller, (SR802 detailed
technical data see in 13 part)
For example
7.4 Main menu - tCYC In three time sections temperature and time control DHW hot water
Function description:
Solar system provides DHW hot water controlling function. To achive this function, it needs
an extra circulation ( connect output R4) and a temperature sensor which installed on the
DHW return pipe( connect input T5). When controller monitors temperature of T5 is below
the preset switch-on temperature, DHW pump is triggered until return temperature rises up to
the switch-off temperature. If no sensor T5 is installed, DHW pump is only controlled by
time, every day three time sections can be set, within a working time section, DHW pump
works every 3 minutes, then stops for 15 minutes ( default), repeats same process during
whole time section, this operation time and interval time can also be set personally.
Two parameters temperature and time are used to control DHW pump.
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