Solar working station operation manual SR881
- 27 -
When tank temperature rises to its preset maximal temperature, solar circuit pump is
ceased compulsively even the temperature difference is satisfied. If the sunshine is very
good, as a result collector temperature will rise continuously, when collector temperature
rises up to its maximal temperature, solar pump will be triggered again even at the case that
tank temperature is already to its maximal temperature. And solar pump works until the
temperature of collector is decreased by this reversed circulation or when tank temperature
rises its emergency temperature (95
o
C).
When displays, and blinks on the screen, it indicates that tank emergency
temperature reaches, tank temperature is ≥95
℃
Setup steps:
To access main menu TEMP, then select submenu CMX “CMX 110
o
C” displays on the
screen.
►Press “SET” button, parameter “110
℃
” blinks.
►Press “+”“-” button, to adjust the collector protection
temperature, adjustable range (60
℃～
190
℃）
, factory set
is 110
℃
►Repress “SET” button, activate and deactivate this function, if deactivate the function,
“CMX - - -” displays on screen.
►Press “ESC” button to exit the menu or wait for 20 seconds to exit automatically,
parameters are saved automatically.
CMX signal displays on screen, it indicates that this function is in activated.
4.4.4 CMN low temperature protection of collector
Description:
When the temperature of collector is below preset CMN temperatures, solar circuit pump is
locked, even when the temperature difference between collector and tank exceeds
switch-
on temperature difference, solar pump doesn’t work yet. When temperature of
collector is 3
o
C higher that the preset CMN temperature, solar circuit pump is unlocked for
operating, controller exits this program.
Setup steps
:
To access main menu TEMP, then select submenu CMN, “CMN-----” displays on screen,
default set is off.
►Press “SET” button, default off signal “- - -” blinks on screen.
