Instruction of SR91 Split Pressurized Solar Hot Water System
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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)
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
