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ECONCEPT SOLAR ST
Lighting
Whenever the power to the regulator is switched on, the display activates all the symbols for 2 seconds; in the next 5
seconds, the display will show the regulator software version.
Standby mode
After the lighting stage, if there are no faults and/or higher priority demands, the regulator goes to standby mode. The
following information is displayed:
•
Standby: temperature of Solar Collector PT1000 sensor S3 with range 1¸175°C, the symbol S3 will be lit up; tem-
perature of Solar collector Return NTC sensor S4 with range 1¸125°C, the symbol S4 will be lit up.
•
Press the Info button for 1 second and the regulator returns to standby mode.
Operation
Solar Circulating Pump activation
If the temperature of the Hot Water Tank Sensor is lower than the Tank max. temperature parameter value (Installer
parameter, default value equal to 60°C) and if the difference (positive) between the temperature of Solar Collector Sen-
sor S3 and the temperature of the Hot Water Tank Sensor is higher than or equal to the Activation temperature differ-
ential parameter value (Installer parameter, default value equal to 6°C) then the ECOTRONIC tech regulator activates
the Solar Circulating Pump .
To signal this mode, the Solar Circulating Pump symbol will be lit up.
Solar Circulating Pump modulation
When the Solar Circulating Pump is working and the Solar Circulating Pump Operation parameter (Installer parameter,
default value equal to 0=On/Off ) is set to 1, the modulation algorithm is:
1. If the difference between the temperature of Solar Collector Sensor S3 and Solar Collector Return Sensor S4 is less
than or equal to the Minimum - Solar Circulating Pump Modulation temperature differential parameter value (Installer
parameter, default value equal to 10°C), the Solar Circulating Pump works at speed 1 (Min. power, 40%). To signal
this mode, the symbol A will be lit up.
2. If the difference between the temperature of Solar Collector Sensor S3 and the Solar Collector Return Sensor S4 is
greater than the Minimum - Solar Circulating Pump Modulation temperature differential parameter value (Installer
parameter, default value equal to 10°C), the Solar Circulating Pump works at speed 2 (55%). To signal this mode,
the symbol B will be lit up
3. If the difference between the temperature of Solar Collector Sensor S3 and the Solar Collector Return Sensor S4 is
greater than the Minimum - Solar Circulating Pump Modulation temperature differential parameter value (Installer
parameter, default value equal to 10°C) plus the Solar Circulating Pump modulation temperature differential param-
eter value (Installer parameter, default value equal to 5°C), the Solar Circulating Pump works at speed 3 (70%). To
signal this mode, the symbol C will be lit up.
4. If the difference between the temperature of Solar Collector Sensor S3 and the Solar Collector Return Sensor S4 is
greater than the Minimum - Solar Circulating Pump Modulation temperature differential parameter value (Installer
parameter, default value equal to 10°C) plus double the Solar Circulating Pump Modulation temperature differential
parameter value (Installer parameter, default value equal to 5°C), the Solar Circulating Pump works at speed 4
(85%). To signal this mode, the symbol D will be lit up.
5. If the difference between the temperature of Solar Collector Sensor S3 and the Solar Collector Return Sensor S4 is
greater than the Minimum - Solar Circulating Pump Modulation temperature differential parameter value (Installer
parameter, default value equal to 10°C) plus triple the Solar Circulating Pump Modulation temperature differential
parameter value (Installer parameter, default value equal to 5°C), the Solar Circulating Pump works at speed 5 (Max.
power , 100%). To signal this mode, the symbol E will be lit up.
N.B.:
If, at the moment of Solar Circulating Pump activation, the ECOTRONIC tech regulator does not have to set
speed 5 (Max. power , 100%), the Solar Circulating Pump will work in any case at speed 5 (Max. power, 100%)
in the first second of operation .
If the Solar Circulating Pump Operation parameter (Installer parameter , default value equal to 1=Modulating)
is set to 0 there will be no modulation: the Solar Circulating Pump will work in on/off mode according to the
normal Solar Circulating Pump activation/deactivation algorithms . To signal this mode, the symbol E will al-
ways be lit up.
EN
cod. -- - 11/2010 (Rev. 00)
39
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