Solar working station operation manual SR881
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liquid; this kind of system is only suitable in area where the ambient temperature is near to
0
o
C for only few days. If safety requirement is very high, then anti-freezing is necessary, we
suggest using suitable anti-freezing liquid to avoid frost problem.
4.4.6 SMX Maximum temperature of tank
Description:
When the DT between collector T1 and Tank T2 caters the switch-on DT of circulation, solar
pump is triggered, but in order to avoid the high temperature inside tank, controller will
check whether the temperature (T3) of top part of tank is higher than maximum temperature
of tank, when T3 is higher than preset SMX temperature, solar pump is ceased even at the
case that DT caters condition. When tank temperature drops and is 2
o
C below the SMX,
solar pump restarts when DT caters condition.
Setup steps:
To access main menu TEMP, then select submenu SMX, “SMX 70
o
C” displays on screen.
►Press “SET” button, parameter “70
℃
”blinks
►Press “+”“―” button to adjust the value of maximum
temperature of tank, adjustable range is
（
2
℃～
95
℃）
,
default set is 70
℃
►Repress “SET” button to activate and deactivate this function, if function deactivated,
“SMX - - -” displays on the screen.
► Press
“ESC”
button to exit the menu or wait for 20 seconds to exit automatically,
parameters are saved automatically.
SMX signal displays on screen, it indicates that this function is in activated.
4.4.7 REC Tank re-cooling function
Description:
If tank temperature is over tank’s maximum temperature, and at the same time, collector
temperature is 5
o
C lower than tank temperature, then solar pump is triggered, through this
reversed circulation, tank temperature is decreased by heat loss occurs in collector, solar
pump keeps in working until tank temperature drops below its maximum temperature.
Setup steps:
To access main menu TEMP, then select submenu REC, “REC OFF” displays on screen,
default set is off.
