5. MAIN MENU
TX= XXX C
Pump Off
“TX”
- indicate current selected temperature channel. To select
another channel, operator must use
UP
and
DOWN
button
( default value that is displayed after power-up is Tb)
“XXX”
- temperature value in degree.
“
Pumpe Aus” or “PumpeEin”
- display state of pump
The status of the heater is not indicated.
SR03
has four buttons UP,DOWN,MODE and SET .
UP
and
DOWN
are of general
purpose.
SET
button is use for parameters adjustment.
MODE
is use for modes switch. The
three modes are as follows :
- AUTO
– automatic pump control
- ON
– absolutely pump switch on
- OFF
– absolutely pump switch off
Pump control rules by priority in AUTO mode
Condition
Pump state
Situation
Тb > “AlarmTb”
Pump Off
Boiler overheating
Ts > “AlarmTs”
Pump Off
Installation overheating danger
Ts < “AlarmFr”
Pump On
Installation freezing danger
Ts < “minTs”
Pump Off
Low environmental temperature
To > “AlarmTo”
Pump Off
Solar panel temperature set has achieved
Ts – To > “DeltaSP”
Pump On
Heating from Solar panel
Figure 6
. Response of the controller according to the temperature of the solar panel
Document edition
2020-04-22
5
