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System 2A and 2B with 1 tank, 1 circulating pump and 3 probes
Switching on
Whenever the controller is powered, the display will activate all symbols for 2 seconds; whereas, in the following
5 seconds, the display will show the controller software version.
Standby Mode
After the activation phase, in the absence of faults and/or higher priority demands, the controller goes on standby.
The following information will be displayed:
• Standby: solar collector PT1000 sensor S3 temperature with range 1÷180°C, the symbol S3 will be lit up.
• Press the Info button for 1 second to display the hot water tank NTC sensor S2 temperature with range 1÷125°C, the
symbol S2 will be lit up, and the upper hot water tank PT1000 sensor S1 with range 1÷180°C, the symbol S1 will be
lit up.
• Press the Info button for 1 second and the controller returns to standby.
operation
Solar Circulating Pump Activation
If the hot water tank sensor S2 temperature is less than the Tank maximum temperature parameter value (Installer
parameter, default 60°C) and the difference (positive) between the solar collector sensor S3 temperature and the
hot water tank sensor S2 temperature is greater than or equal to the Activation temperature differential parameter
value (Installer parameter, default 6°C), the ECOTRONIC tech controller activates the solar circulating pump.
To signal this mode, the solar circulating pump symbol will be lit up.
Solar Circulating Pump Deactivation
If the hot water tank sensor S2 temperature is less than the Tank maximum temperature parameter value (Installer
parameter, default 60°C) and the difference (positive) between the solar collector sensor S3 temperature and the
hot water tank sensor S2 temperature is less than or equal to the Deactivation temperature differential parameter
value (Installer parameter, default 4°C), the ECOTRONIC tech controller deactivates the solar circulating pump.
If the hot water tank sensor S2 temperature is greater than or equal to the Tank maximum temperature parameter
value (Installer parameter, default 60°C), the ECOTRONIC tech controller deactivates the solar circulating pump.
To signal this mode, the solar circulating pump symbol will go off.
Additional heating (thermostat function) For system 2A only
(Only with Parameter P20=1 and with Parameter P14 > P13)
During normal operation, if the upper hot water tank sensor S1 temperature is less than the Thermostat activation
temperature parameter value (Installer parameter, default 40°C) the ECOTRONIC tech controller activates the
output relay connected to terminals 13-14-15 (FREE CONTACT on the 11-pole connector); whereas if the upper
hot water tank sensor S1 temperature is greater than the Thermostat deactivation temperature parameter value
(Installer parameter, default 45°C), the ECOTRONIC tech controller deactivates the output relay connected to
terminals 13-14-15 (FREE CONTACT on the 11-pole connector).
The contact is voltage-free with switch-over contact: NC 14-15, NO 13-14.
To signal the additional heating mode, the contact symbol will be lit up.
excess heat dissipation (thermostat function) For system 2B only
(Only with Parameter P20=1 and with Parameter P14 < P13)
During normal operation, if the upper hot water tank sensor S1 temperature is greater than the Thermostat activation
temperature parameter value (Installer parameter, default 40°C) the ECOTRONIC tech controller activates the
output relay connected to terminals 13-14-15 (FREE CONTACT on the 11-pole connector); whereas if the upper
hot water tank sensor S1 temperature is less than the Thermostat deactivation temperature parameter value
(Installer parameter, default 45°C), the ECOTRONIC tech controller deactivates the output relay connected to
terminals 13-14-15 (FREE CONTACT on the 11-pole connector).
cod. 3540V011 - 03/2017 (Rev. 00)
ECOTRONIC tech
139
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