Instruction of SR91 Split Pressurized Solar Hot Water System
Page 24 of 49
temperature difference. The set temperature difference must be at least 0.5 K higher
than the switch-on temperature difference.
SMX Maximum tank temperature protection set
If the tank temperature reaches the adjusted maximum temperature, the tank will no longer
be loaded in order to avoid damage caused by overheating. If the maximum tank
temperature is exceeded, sign is displayed on the screen.
The sensor for tank maximum limitation (SMAX) can be selected. The maximum limitation
always refers to the sensor selected (T2 or T3). The switch-on hysteresis (HYST) is
selectable(Default is 2
o
C), for example, when tank maximum temperature is set to 70
o
C
，
then
at 68
o
C, Maximum tank temperature protection function is deactivated automatically.
Menu Structure
Main
menu
Sub
menu
Factory
set
Adjustab
le range
Step per
adjust
Description
LOAD
Tank heating
DTO
6K
1-50K
0.5K
Switch-on temperature difference of
tank heating
DTF
4K
0.5-49.5K 0.5K
Switch-off temperature difference of
tank heating
SMX
70
℃
4-95
℃
1
℃
Maximum temperature of tank
SMA
X
S2
S2. S3
Sensor for Maximum temperature of
tank ( S3 for T2, S2 for T2)
HYST 2K
0.1-10K
0.1K
Hysteresis of maximum temperature
of tank
Setup the function
► Select “LOAD” main menu
► Press “SET”, “DTO 6K” displays on the screen
