SR981S/SR982S operation manual of solar pump station
Page 41 of 85
7.2 CIRC DHW circuilation function activated /deactivated
Setup steps:
Under standby status,
► Press “SET” button, and then press “ ” button, to select “ CIRC” submenu, “CIRC
OFF” displays on the screen, default set is “ OFF”.
► Press “SET” button, “CIRC OFF” blinks on the screen.
► Press “SET” button, “CIRC ON” displays on the screen;
it means DHW water circulation function is triggered.
►Press “ESC” button to exit menu, or waiting for 20
seconds to exit this menu automatically, value of the
parameters are saved automatically
Note:
when the circled sign displays on the screen, it
indicates that the function is in activate.
7.3 tCYC Tempeature or time setting for DHW pump in three time sections
When CIRC function is triggered, this menu just appears in the program menu, under this
menu, you can set the temperature and time to run the DHW pump.
DHW Temperature control description:
This controller has an output to run the DHW circulation pump which can be controlled by
temperature, in this case, this function needs an extra circuit pump (connect with output R3)
and an extra temperature sensor (connect with input T6) which mounted on the hot water
return pipe. When the measured temperature T6 is lower than the switch-on temperature
of circuit pump, pump is triggered, until temperature rises up to the switch-off temperature,
pump is stopped.
Precondition of temperature controlling: tank temperature T3 should be higher than the
preset switch-off temperature of this function, and then DHW pump just can be triggered.
DHW Time control description:
This controller has an output to run the DHW circulation pump which can also be controlled
by time section; in this case, this function needs only an extra circuit pump (connect with
output R3). Pump is triggered by time, within a running time section, as default set, pumps
