2
Turn the control knob
to navigate in the menu.
Press the control knobto
enter the menu and accept
the changes.
Control knob and OK
Cancel button
Basic view
Holding the key down for an ex-
tended period of time returns the
regulator to its basic mode. The
display shows the basic view, the
background light of the display
dims and the keyboard locks if the
locking function is in use.
This user manual consists of two parts. Issues that are intended for all users are presented in the first part
of user manual. The issues related to service mode are at the end of it. In addition there are issues, which
are only intended for persons in maintenance or who has in-depth knowledge of the control process.
The S203 is a heating controller for 3 circuits (two heating circuits and one hot water circuit). Wiring and
configurating selections define what is seen on the display screen.
Outdoor temp.
H1 Supply water
H2 Supply water
DHW Supply water
Automatic
Automatic
Automatic
-12.4°C
45.2°C
32.8°C
58.0°C
13:51 12.02.2021
Selection >
Not in use
Calibration
Calibration
Calibration
-12.4°C
45.2°C
32.8°C
58.0°C
13:51 12.02.2021
The calibration time is always performed when the
controller is started and every Monday at 9.00. The
calibration duration is 1.1 times the
actuator running time.
Outdoor temp.
H1 Supply water
H2 Supply water
DHW Supply water
Selection >
Inputs and outputs
H1 Control circuit
H2 Control circuit
DHW Domestic hot water control
Main menu
>
>
>
>
OK
OK
