DIGITAL CONTROL UNIT FOR THERMAL
SOLAR SYSTEMS - Art. S303
ICMA S.p.a. - Heating Technologies - www.icmaspa.it FIS303ENCL - 01/2022
Icma SpA - Via Garavaglia, 4 - 20012 Cuggiono (MI) ITALY Tel: +39 02 97249134 - +39 02 97249135
www.icmaspa.it - sales@icmaspa.it
22
20
TDST24M100SE 035912 111220
The setting ranges for each individual dataare listed below.
Enabling the anti-legionella function
Data Regulation range Default
EN L 0 .. 1 1
Note: with ‘0’, the function is disabled, while with
‘1’ the function is activated.
Alarm Reset / Reset of the 30-days counter.
Data Regulation range Default
RS L 0 .. 1 0
Note: Selecting ‘1’ the control unit exits from the
alarm mode, resetting the 30 days’ counter.
WARNING!
- When the Anti-Legionella function is enabled, both
maximum TM and safety TS temperatures, if they are
lower, are automatically set to the following values:
TM-: TLEG + 5.0°C
TS-: TLEG + 10°C
- The temperature value of anti-Legionella is xed to
65°C, therefore not adjustable.
- The differential value is xedto 2°C, therefore not
adjustable.
FUNCTIONS ACCESSIBLE TO THE USER
The functions accessible to the user are limited and do
not allow setting those data inuencing the installation
management.
The only operations allowed to the user are the following:
Turning on / Turning off the control unit
Enabling / Disabling ABC function in the control unit.
User menu
PRESS THE ‘ esc ‘ KEY TO RETURN TO THE USER
PARAMETERS SELECTION MENU.
WAIT 20 SECONDS OR PRESS THE ‘ esc ’ KEY TO QUIT
THE USER MODE.
PRESS THE ‘ ‘ KEY TO ACCESS
‘ USER PARAMETERS ’.
THE FIRST ‘ USER PARAMETER ’
IS SHOWN.
USING THE ‘ ‘ OR ‘ ‘ ARROWS IT IS POSSIBLE TO
SCROLL CYCLICLALLY THROUGH THE USER
PARAMETERS:
U1: SHOWS MAXIMUM TEMPERATURES
U2: ENABLES / DISABLES ANTIFROST
PRESS THE ‘ ‘ KEY TO SELECT THE
DESIRED PARAMETER.
SET THE DESIRED VALUE FOR EVERY SINGLE
PARAMETER AS EXPLAINED BELOW.
WARNING!
In the ‘ USER PARAMETERS ‘ mode all the outputs are
disabled.
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