SUNFLOWER SR81Q - Page 20

Instruction of SR81 Split Pressurized Solar Hot Water System
Page 19 of 59
Within a time section, if DHW circulation pump is
controlled by time, at this case, only an extra circuit pump
(connect to output R2) is needed. Pump is triggered by
time, within a running time section, as default set, pump
runs for 3 minutes (adjustable range 0-30 minutes) and
then ceases for 15 minutes (adjustable range 0-60
minutes), same process repeated within the running time
section.
Note: if the ceased time (CYCF) is set to 0 minute, it means within this time section,
circuit pump keeps running without any stop.
Default time section:
 The first time section: starts at 05:00, stops at 7:00, runs 3 minutes, then stops 15
minutes
 The second time section: starts at 11:00, stops at 13:00, runs 3 minutes, then stops 15
minutes
 The first time section: starts at 17:00, stops at 22:00, runs 3 minutes, then stops 15
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 R2 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 temperature controlled Mode STAT 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