Freeze protection controller ETR2-1550

The control centre measures the outdoor temperature and, at the same time, detects the amount of ice and snow accumulated in the target area. The heating is only activated when temperature drops below the set value (0°C...+5°C) and when moisture is detected at the site. Once the snow and ice have melted and the melt water has drained away, the control unit deactivates the heating on the basis of the moisture readings. The heating is also deactivated when the temperature rises above set value. The control centre can also be programmed to keep the heating activated for another 1–6 hours after the thawing has ended. An external timer can also be added to the control centre. It is also possble to switch the heating on manually for a desired period of time (0–6 h), in which case, the control ignores the sensor signals. Constant heating is also possible, and it can be switched on by selecting the setting 'Constant' with the time-selector switch. The control centre is to be installed on a DIN-rail in, e.g., the electrical cabinet of the building. In connection with the de-icing of outdoor areas, the sensor ETOG-55 is to be embedded in the area that is to be kept free of ice and snow. The control can be made even more effective with the aid of the ETF-744 sensor that measures the outdoor temperature. ETR2-1550 is, in terms of functions, a similar control centre that is intended for the controlling of ice and snow melting systems in small outdoor areas and rainwater pipe systems. Since the thermostat only contains one control circuit, it can be used for controlling the de-icing of either the yard or the gutter. A load of up to 3.6kW can be connected to the device. 

Electrical number Product Name Pcs Buy
2620224 Freeze protection controller ETR2-1550
  • Operating voltage: 230 V +/- 10%, 50/60 Hz
  • elay output: 16 A, dead, 3,600 W
  • NOTE! Does not include any sensors (Select suitable sensors from our accessories)
  • On/off difference: 0.4°C
  • Temperature control range: 0°C...+10°C
  • After-heating period: 05 h + separate setting for constant heating
  • Power consumption: 3 VA
  • Ambient temperature: 0°C...+50°C
  • IP rating: IP20

Meaning of the LED indicators:

  • green = power on
  • red - moisture = moisture detected
  • red - temperature = outdoor temperature below the set limit
  • red - relay = heating on
Parts