Solar differential temperature controller-Elios 25 Vario




Digital solar differential temperature controller-Elios 25 Vario 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.1 on-off relay outputs SPST, 1 semiconductor relay output (variable pump speed) and 1 alarm auxiliary relay output SPDT. Minimum thermostat.
Additional thermostats for driving auxiliary heat sources. All temperatures are displayed.
Configuration of 9 different system layouts. Offset correction for the measured temperatures.
Self diagnostic feature, with visual and acoustic alarms.

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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
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 2(1)A@ 250V~ (SPST) / 2A@ 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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