6
• LCD display
Allows viewing of heating and domestic hot water set point
temperatures and the error codes.
Stand-by:
The following alternate every 5 seconds on the display:
The set point temperature is shown while the
symbol flashes:
(the return temperature is displayed if
temperature regulation with compensated set
point regulation is active, see page 9)
The set point temperature is shown while the
symbol flashes:
Domestic cycle ON:
Heating temperature set point
(the return temperature is displayed if
temperature regulation with compensated set
point regulation is active, see page 9)
60
60
48
Domestic hot water temperature set point
48
• Trimmers for set point settings
These allow setting of the temperature set point for the heating and
domestic water cycle (on low and medium temperature models)
and view the associated set value on the display.
• RESET key
User interface
The user interface, built into the PCB, consists of the following
devices:
• LED indicator
The various functions and faults are signalled by either flashing or
steady illumination of the LEDs.
ON
-
Electric supply 230 V (ac)
DHW -
Domestic cycle
CH
-
Heating cycle
FAULT -
Fault detected
Domestic cycle
Heating cycle
Operating principle
All heating and domestic hot water functions offered by
SATK20 series HIUs are controlled by a digital controller.
The controller is factory set with different parameters and settings
depending on the model (Table 1).
There are a number of specific DIP SWITCHES on the controller
circuit board; the way these are configured will determine the
settings of the various models and the optional functions enabled.
Electronic regulator
1
2
3
4
5
6
This allows restoration of normal function after the
safety thermostat has been triggered and
activation/deactivation of the floor slab heating
function.
CODE
SWITCH SETTING
SET POINT
6
5
4
3
2
1
HEATING
DHW
SATK20103HE
LOW temperature
25 – 45°C
42 – 60°C
SATK20203HE
MEDIUM temperature
45 – 75°C
42 – 60°C
SATK20303 / 20403HE / 20305
HIGH temperature
-
42 – 60°C
Table 1 – factory default settings
Factory set (do not change)
May be changed to activate optional functions
Switch 1: modulating temperature regulation with compensated set point
Switch 5: domestic hot water pre-heating function
OFF
ON
OFF
ON
see page
13
Heating cycle ON:
