Brunton Thermostat - Type ETR

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Thermostat for heating cables in gutter

  • Recommended for control of de-icing cable in gutter.
  • Electronic on/off control up to 16A / 3600W.
  • 3 LED's shows actual operation.
  • Adjustable start/stop differential.
  • Delivered incl. outdoor sensor
  • For DIN-rail mounting.


Type Product
ETR/F-1447A Thermostat with relay, SPST 16A incl outdoor sensor
ETR/F-1447P Thermostat with relay, SPCO 10A potential free contact, incl outdoor sensor
ETNK Cover box for wall mounting
ETF-744/99 Outdoor sensor

The ETR is a thermostat for economical control of de-icing cables in gutter in smaller buildings e.g. family houses. Icicles are formed within certain temperature ranges, and to neutralize this, heating cables are used where there is a tendency for ice to form. The critical temperature may be different from one building to another, or one position to another. The ETR is easy adjustable, and LED indicators assist in setting up the correct temperatures.

Thermostat control:
Type ETR is an electronic on/off thermostat with control of temperature by means of NTC sensor. The heat output is switched on and off with a difference of only 0.4°C. Red LED indicates when heating is on.


Supply voltage

230V ±10%, 50/60 Hz

Output relay:


- ETR/F-1447A

SPST 16A, max 3600W

- ETR/F-1447P

SPCO potential free 10A, max 2200W

On/off differential


Setting of min./max. temperature range:


- HIGH (max. temperature)


- LOW (min. temperature)

ETR/F-1447A 0/-15°C

ETR/F-1447P 0/-10°C

Power consumption


Ambient temperature



IP 20



Dimensions (HxWxD)

86x52.5x58 mm

LED's indicates:

  • Red The relay is ON.
  • Yellow The sensor temperature is above the selected temperature range.
  • Green The sensor temperature is below the selected temperature range.

Mounting of thermostat:
DIN-rail mounting in a switchboard. A cover box for separate wall mounting is available.

Mounting of outdoor sensor:
The sensor is mounted under the roof eaves.

Adjustment of the System:
The system is installed as per the connection diagram. HIGH should be set to +2°C and LOW to –2°C.
When icing occurs, note which of the LED's is energized:
- If Green is energized, turn LOW down until Red LED is energized.
- If Yellow LED is energized, turn HIGH up until Red LED is energized.
After a few adjustments the correct setting will be achieved, and no icing will occur, irrespective of how cold the temperature will be. The system will function automatically with the minimum consumption of energy.

Note: If icing occurs while the Red LED is energized, the heating is either insufficient, or is interrupted.