Instruction of SR81 Split Pressurized Solar Hot Water System
Page 18 of 59
► Press “SET” or “ESC” button to save the setting.
► Press “+” button to access the window of the switch-off time and temperature of the first
heating section, “th1F 05：00” displays on the screen
► Press “SET” button, hour time “05” blinks
► Press “+/-” button to adjust hour of the switch-off time
► Press “SET” button, minute time “00” blinks
► Press “+/-” button to adjust minute of the switch-off time
► Press “SET” button, temperature “50” blinks
► Press “+/-” button to adjust the switch-off temperature
► Press “SET” or “ESC” button to save the setting.
► Press “+” button to access the window of the switch-on time and temperature of the
second heating section, repeat above steps to set time and temperature for the second and
third heating section.
Note: definition of timing heating sign
1) Within the preset time section, if timing heating isn’t working, heating sign is
lighted on the screen
2) Within the preset time section, if timing heating is working, heating sign blinks
on the screen.
3) Out of the preset time section, heating sign doesn’t display on the screen.
7.2 CIRC DHW circulation pump controlled by temperature and time
Function description:
This controller provides an output for running DHW circulation pump, which can be controlled
by a temperature sensor, at this case, an extra circuit pump (connect to the output R2) and
an extra temperature sensor installed on the hot water return pipe (connect to the input T4)
should be installed in the system. When the temperature of DHW return is lower than the
preset switch-on temperature, circuit pump is triggered, until temperature rises up to the
switch-off temperature, pump is stopped.
2 controlling modes are designed for running DHW circulation pump
Time controlled DHW pump within the preset 3 time sections (default Mode)
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