SR981S/SR982S operation manual of solar pump station
Page 62 of 85
►Press “ ” button, “PUMP2 HE A” shows on the screen, then pump output is high
efficiency mode (RPM controlled)
►Press “ESC” button to exit the menu or wait for 20 seconds to exit, parameters are
saved automatically.
Note:
when pump mode is set as “PUMP2 HE A”, pump speed is changed with scope
20%~ 100%.
Note: when pump mode is set as” PUMP2 ONOF”, pump is running with fixed speed, RPM
control is deactivated.
8.5.4.1 n2MN Pump 2 speed adjustment (RPM)
Output mode of R2 can be set as RPM output or as simple on/off mode, only you set the
output mode
as RPM mode, then you can see this submenu, and when you set “nMIN”
value of 100%, then this output becomes “on/off “ control mode.
Normal ONOF switch output
: circuit pump speed control (RPM) is deactivated, pump is
operated with a fixed speed, and flow rate is not changed.
HE A control output:
(speed control is activated), the control system attempts to maintain
a constant temperature difference between collector and tank, and as a result the pump
performance is continuously adjusted; the flow rate of pump is increased or reduced based
on the temperature difference
Setup steps:
To access main menu FUN, select submenu “n2MN”,
“n2MN 100” shows on the screen.
►Press “SET” button, parameter “100” blinks on the
screen.
►Press “ ” button, to adjust pump speed. adjustable range: (30
～
100%),
factory set is 100%.
►Press “ESC” button to exit the menu or wait for 20 seconds to exit, parameters are
saved automatically.
