ICMA S303 - P6: INTEGRATION HOURS COUNTER; P7: LIMITATION OF COLLECTOR MINIMUM TEMPERATURE

DIGITAL CONTROL UNIT FOR THERMAL
SOLAR SYSTEMS - Art. S303
ICMA S.p.a. - Heating Technologies - www.icmaspa.it FIS303ENCL - 01/2022
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TDST24M100SE 035912 111220
The counter recording the running hours of the integrative
source can handle values up to 9999.
Once the maximum value is reached the counter stops.
PRESSING THE ‘  ‘ KEY RESETS THE COUNTER,
PRESSING THE ‘ esc ’ AGAIN SHOWS THE CURRENT
RUNNING HOURS.

PRESS THE ‘  ‘ KEY , THE DISPLAY
SHOWS ‘H’ FLASHING.
THE DISPLAY SHOWS ‘H’ AND ACTUAL HOURS OF
ACTIVITY OF THE INTEGRATIVE SOURCE.

AFTER SELECTING PARAMETER P6 PRESS THE ‘  ‘
KEY.

P6:
INTEGRATION HOURS COUNTER
Using this parameter it is possible to display the actual
number of hours of the integrative source operation or reset
it.
P7: LIMITATION OF COLLECTOR MINIMUM
TEMPERATURE
The parameter ‘Minimum Temperature Limitation’ on
collector is used to manage the Minimum Temperature
Thermostat used for activation of the collector pumps.
This thermostat stops the pumps operation whenever on the
relevant panel is measured a temperature lower than the one
set in this parameter.
The function ‘Minimum Temperature Limitation’ is not active
when in ABC operation or in case the pumps activation is
caused by the intervention of Recooling or similar functions.
AFTER SELECTING PARAMETER P7 PRESS
THE ‘  ‘ KEY.

WITH ARROWS ‘  ‘ OR ‘  ‘, YOU CAN CYCLE AMONG
THE FOLLWOWING THERMAL DATA FOR REGULATION:
- Setting of the collector minimum temperature ‘ MTC ‘
- Enabling/Disabling of the minimum
temperature limitation ‘ MTEN ‘

PRESS THE ‘  ‘ KEY TO MODIFY THE THERMAL DATA
SELECTED; THE DATA WILL START FLASHING.


USE THE ‘  ‘ OR ‘  ‘ ARROWS TO SET THE
DESIRED NUMERIC VALUE.
PRESS THE ‘  ‘ KEY TO CONFIRM THE
PROGRAMMING OR PRESS THE ‘ esc ’ KEY TO CANCEL
THE CHANGES.
Adjustment of collector minimum temperature
Data Regulation range Default
MTC 10.0°C .. 90.0°C 10.0 °C
Enabling/disabling the collector minimum temperature
Data Regulation range Default
MTEN 0 .. 1 0
Note: with ‘ 0 ‘ the limitation of minimum temperature
on collector is disabled, while with ‘ 1 ‘ it is
enabled.