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
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TDST24M100SE 035912 111220
WARNING!
Before wiring the appliance be sure to turn the mains power off.
WARNING! S1, S2 and S3 are NTC temperature sensors. For S1 sensor the -50°C..+200°C range probe (blue cable) must be
used, while the probes with the range of -50°C..+110°C (yellow cable) can be used for the other probes.
The outputs OUT1, OUT2 and Alarm, are voltage free. It is advisable to t a 10A 250V~ fuse on the power unit mains capable
to intervene in case of short circuits on loads.
TERMINAL BOARD GROUNDING: On the base of the control unit case is located a brass terminal board for connecting the
ground protection conductors of the load devices connected to the control unit.
: reinforced insulation
WIRING EXAMPLE ONLY FOR SOLAR CIRCULATORS IN ACCORDANCE WITH DIRECTIVE ErP 2015 WITH
EXTERNAL PWM SIGNAL.
PWM signal
LN
230V~
(-)
230VAC power supply
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