Solar thermal controller-Elios 25 Vario Plus




Digital differential solar thermal controller-Elios 25 Vario Plus for solar heating plants: it compares temperatures of fluids in the collectors and the storage tanks and,
when the difference is greater than DeltaT, starts the heat exchange through the pump. 4 Pt1000 temperature inputs, 2 semiconductor relay outputs (variable pump speed) and 1 alarm auxiliary relay output, SPDT.
Additional thermostats for driving auxiliary heat sources. All temperatures are displayed.
Configuration of 20 different system layouts. Contextual parameters. Minimum thermostat.
Offset correction for the measured temperatures. Self diagnostic feature, with visual and acoustic alarms. Available functions: recooling function, pump/valve kick, calorimeter.

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Power supply 230V ~ ±10% 50Hz
Power absorption 4VA
Inputs 4 x Pt 1000  B DIN Class
Included sensors 2x Pt 1000 (110°C)   -    1x Pt 1000 (200°C)
Sensor operating range 1 Pt 1000 -50°c..200°C    -      3 Pt 1000 -50°c..110°C
Temperature reading range -40°C .. 260°C
Accuracy ±1°C
Resolution 0,1°C (0,2°F)
Offset adjustment on S1, S2, S3, S4: ±5°C
Installer password 0000 .. 9999 (default 0000)
Acoustic signal On/Off (default On)
Back light timing 20 sec. from last keypress
Out2, Out3, Out4 relay logic NOR=N.O. REV.= N.C. (default N.O.)
Contacts rating 2x2(1)A@ 250V~(SPST)/ 2x2A@ 230V~ powered
Protection grade IP40
Operating temperature range 0°C .. 40°C
Storage temperature range -10°C .. +50°C
Humidity 20% .. 80% non-condensing
Case ABS VO self-extinguishing
Dimensions H108 W156 D47mm

230V or Battery powered Thermostat

Small Dimensions - Innovative Design

Large LCD
Power supply: 2 x 1,5V Type AAA batteries - TAD 02B   or   230V TAD 02M

3 regulation modes: Comfort, Economy, Off/Antifreeze

Remote sensor is optional

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