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Frequently asked questions

Headline: 6 wire ETOR-55
Question: My ETOR-55 sensor has 6 wires - only 4 are described in the manual. What to do with the last two wires (pink and grey)?
Answer

The ETOR-55 is now fitted with the same cable as the ETOG-55 - and can therefor be connected in the same why as the ETOG. As an alternative these two wires can be cut of (wires are not connected/used in sensor)


Headline: Defective ETOG-55 temperature sensor
Question: The temperature sensor in my buried ETOG-55 doesn't work. What do I do if I don't want to dig up the sensor?
Answer

- Remove the wires for the temperature sensor from the ETO2 terminals.

- Mount a ETF-744/99 sensor on the outdoor sensor input.

- Reinstall the unit (Password 1202).

- Set the used sensor input to ETOR instead of ETOG

- Set outdoor sensor to on  


Headline: Delta/Star configuration
Question: How does the delta/star configuration work?
Answer

When snow is detected snowmelting is started in delta configuration. In after run time the controller switches to star configuration (1/3 power).

In delta configuration output 1 + 2 is active - in star configuration 1 + 3 is active


Headline: Diffence between ETOG and outdoor temperature
Question: When reading outside air temp my ETOG sensor can be several °C/F higher than the current outdoor/ground temp.
Answer

The shown temperature is the sensor temperature. Since the sensor - during moist detection - is heated, the outdoor/ground temperature doesn't match the sensor temperature.

 


Headline: Does my ETOG-55 work?
Question: I need to know what I'm suppose to measure on my ETOG-55 sensor.
Answer

See the following PDF!

ETOG-55 drawing


Headline: ETO2 adjustment
Question: I need to calibrate my ETO2+ETOG embedded sensor, as the sensor temperature differs from that showed on the ETO2 display.
Answer
  1. Disconnect sensor from terminal 11 and 12 (sensor heat) on ETO2
  2. Wait a few hours until the sensor has the same temperature as the ground
  3. Measure real ground/sensor temperature and compair with the temperature shown in the display of the ETO2.
  4. Program offset for the relevant sensor to match the difference between the two temperatures (measured / real)
  5. Connect sensor to terminal 11 and 12 on ETO2

Headline: ETR2 with ETSG-55 sensor
Question: How to connect an old ETSG-55 with a ETR2-1550 controller?
Answer:

 


Headline: Moist is blank
Question: There is no yes/no indication on the moist
Answer

If the outdoor temperature is above setpoint the ETO2 won't look for snow and therefor the moist sensing indication is blank.


Headline: Output 3
Question: How do I turn K3 on on the ETO2 controller?
Answer

K3 is activated when there is a heat demand (snowmelting) in 1-zone configuration. In this configuration all 3 relays are activated at the same time.


Headline: Power Outage
Question: If the power goes out to the residence, and remains out for a significant period of time (lets say for 4 to 6 hours), does this effect the programing to the ET02 controller?? even if power is out, does the unit keep the programmed settings??
Answer

The settings are stored in a EEPROM which means that the settings are stored forever (several years)


Headline: Snowmelt control output voltage
Question: What is the voltage output of the three output relays? Manual shows .3 x 16amps
Answer
  • The three output relays + the alarm relay are all voltage-free (potentinal free) outputs.

Headline: Supply/return sensor
Question: If i use ETO2 controller with ETOG-55 outdoor sensor to a water-based 1 zone heating system do i need also supply/return water temperature sensors?
Answer

Yes - if you configure the controller to waterbased you have to connect a supply and return water sensor. If you don't want to superwise supply and return water temperature - change the configuration to Electrical 1-zone. 


Headline: Type of sensor
Question: