Instruction of SR91 Split Pressurized Solar Hot Water System
Page 19 of 49
minutes
Temperature controlled DHW pump within the preset 3 time sections
within a time section, when the DHW circulation pump is
controlled by temperature, as default set, pump is
triggered when return temperature T4 is below 40
o
C, and
it is stopped when T4 rises up to 45
o
C,
There is a precondition for triggering the DHW circuit
pump (set in submenu STAT):
START ON: tank’s temperature sensor (default T3) is
2
o
C higher than the preset switch-off temperature, and then DHW circuit pump can be
triggered.
Note
: two Modes can’t play at the same time, when time controlled Mode is selected,
then temperat
ure controlled Mode can’t be activated.
Default time section:
The first time section: starts at 05:00, stops at 7:00, runs at 40
o
C
，
stops at 45
o
C
The second time section: starts at 11:00, stops at 13:00, runs at 40
o
C
，
stops at 45
o
C
The first time section: starts at 17:00, stops at 22:00, runs at 40
o
C
，
stops at 45
o
C
If it is needed to close one time section, just set the start time and stop time at a same value
(e.g. 10:00 starts, 10:00 stops)
Note:
1) Only one control Mode can be selected, either time control mode or temperature control
mode.
2) If sensor T4 should be installed, in order to avoid measuring error, please ensure to
install sensor at 1.5m far to tank.
3) Both time control mode and temperature control mode, the parameter set steps are
same.
