WARMZONE ETO2 Electric Controller

Product Information

Specifications

• Type: ETO2
• Application: Controller for ice and snow melting
• Features: Fully automatic, detects temperature and moisture, suitable for electric heating cables or water-based heating pipes
• Standards: CAN/CSA E 60730-2-9:01, UL 60730-2-9
• Impulse Voltage: 4 kV
• Enclosure Rating: IP 68

Product Usage Instructions

Sensor Installation
Embedded Sensor ETOG: Designed for outdoor areas. Must be embedded with top flush with surroundings. Sensor cable installation must comply with regulations.
Gutter Sensor ETOR: Install in a gutter or downpipe on the sunny side of the building. Ensure sensor contact elements face against the flow of melt water..

FAQ
Q: What should I do if the product is damaged?
A: If the product has been damaged, it must be inspected by]  authorized personnel before connecting to the power supply.

Type ETO2 is an electronic controller for fully automatic, economical ice and snow melting on outdoor areas and in gutters. Ice forms due to a combination of low temperature and moisture. ETO2 detects both temperature and moisture and the snow melting system will usually only be activated if snow or ice is present. ETO2 is suitable for controlling electric heating cables or water-based heating pipes.

Product programme

• ETO2-xxxx Thermostat.
• ETOG-55 Embedded sensor for detecting temperature and moisture.
• ETOR-55 Gutter sensor for detecting moisture.
• ETF-744/99 Outdoor sensor for detecting temperature

CE MARKING, FOR EU
OJ Electronics A/S hereby declares that the product is manufactured in accordance with Council Directive 2004/108/EC on electromagnetic compatibility (and subsequent amendments) and Council Directive 2006/95/EEC on electrical equipment designed for use within certain voltage limits.

Applied standards
CAN/CSA E 60730-2-9:01, UL 60730-2-9.
The product may only be used if the complete installation complies with current directives.
The product carries a manufacturer’s warranty if installed in accordance with these instructions and current regulations.

If the product has been damaged in any way, e.g. during transport, it must be inspected and checked by authorised personnel before being connected to the power supply.
WARNING – Important safety instructions. Always disconnect the power supply before performing installation or maintenance work on this control unit or any of the components connected to it. This control unit and the components connected to it should only be installed by qualified electricians. Electrical installation must be performed in accordance with applicable local regulations.

Technical data

Thermostat ETO2-4550:

• Supply voltage . . . . .120/240V AC ±10%, 50-60 Hz  Built-in electronic
• power supply (SMPS) . . . . . . . . . . . . .24 V DC, 8 VA 3 output relays (potential-free contact, NO) .3 X 16 A
• Alarm relay (potential-free contact, NO) . . .max. 5 A Control signal to actuator (mixing valve) . .0-10 V
• DC Supply voltage to actuator (mixing valve) . . . . . . . . . . . . . . . .24 V AC / 100 mA
• On/off differential . . . . . . . . . . . . . . . . . . . . . . .0.3°C
• Temperature range . . . . . . . . . . . . . . . . . . . . .0/+5°C
• Ambient temperature . . . . . . . . . . . . . . . . . .0/+50°C
• Ambient air humidity . . . . . . . . . . . . . . . . . . .10-95%
• Enclosure rating . . . . . . . . . . . . . . . . .IP 20 / Nema 1
• Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .600 g
• Dimensions H/W/D . . . . . . . . . . . . . . .90/156/45 mm

Type 1B

• Control pollution degree 2
• Rated impulse voltage . . . . . . . . . . . . . . . . . . . .4 kV
• Embedded sensor type ETOG-55:
• Designed to be embedded in outdoor areas.
• Detection . . . . . . . . . . . . .Moisture and temperature
• Mounting . . . . . . . . . . . . . . . . . . . . . . . .Outdoor area
• Enclosure rating . . . . . . . . . . . . . . . . . . . . . . . . .IP 68
• Ambient temperature . . . . . . . . . . . . . . . .-20/+70°C
• Dimensions . . . . . . . . . . . . . . . . . . . . .H32, Ø60 mm
• Temperature for the ball pressure test . . . . . . .100°C
• Gutter sensor type ETOR-55:
• Designed to be mounted in gutter or downpipe. Is
• used together with outdoor sensor type ETF.
• Detection . . . . . . . . . . . . . . . . . . . . . . . . . . .Moisture
• Mounting . . . . . . . . . . . . . . . . . .Gutter or downpipe
• Enclosure rating . . . . . . . . . . . . . . . . . . . . . . . . .IP 68
• Ambient temperature . . . . . . . . . . . . . . . .-20/+70°C
• Dimensions H/W/D . . . . . . . . . . . . . . .105/30/13 mm
• Temperature for the ball pressure test . . . . . . .100°C
• Outdoor sensor type ETF-744/99:
• Detection . . . . . . . . . . . . . . . . . . . . . . . .Temperature
• Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Wall
• Ambient temperature . . . . . . . . . . . . . . . .-20/+70°C
• Dimensions H/W/D . . . . . . . . . . . . . . . .86/45/35 mm
• Temperature for the ball pressure test . . . . . . .100°C

The snow and ice melting system is deactivated in the event of sensor failure.

SENSOR INSTALLATION

Embedded sensor ETOG, fig. 1:

For installation on outdoor areas where snow and ice is a regular problem. The sensor must be embedded with its top flush with the surroundings with the help of the accompanying installation plate. The sensor cable must be installed in accordance with current regulations.
We recommend that cable pipes be laid to protect the sensor cable. Detailed installation instructions are supplied with the sensor.

Gutter sensor ETOR, fig. 2:

For installation in a gutter or downpipe on the sunny side of the building. It is important to ensure that the sensor contact elements face against the flow of melt water. If necessary, two sensors can be installed in parallel. Detailed installation instructions are supplied with the sensor.

Outdoor sensor ETF, fig. 2:
For use in conjunction with gutter sensor ETOR. Can also be used separately for the detection of temperature alone. The sensor should be mounted on the wall under the eaves on the north side of the building.

Sensor cables:
ETOG and ETOR are supplied with 10 m cable, which can be extended up to approx. 200 m using standard installation cable: 6×1.5 mm² for ETOG and 4×1.5 mm² for ETOR (total resistance must not exceed 10 ohm). The ETF cable can be up to approx. 50 m in length. Sensor cables must be installed in accordance with current regulations. They must never be installed parallel to power cables as electrical interference may distort the sensor signal.

Thermostat installation, fig. 6

The unit should be DIN-rail mounted in an approved panel or wall-mounted in a specially designed and approved metal box (accessory). Connect supply voltage to terminals PE, N and L. All electrical and mechanical installation must be performed in accordance with applicable local regulations.

Setup:
Two sensors can be connected to the thermostat, e.g. two ETOG in the same zone, one ETOG in each of two zones (2-zone control), or two ETOR/ETF in gutter or downpipe.

1-zone electric heating control with ETOG, output relays 1, 2 and 3 (fig. 3):

Connect 2 (1) ETOG sensors to terminals 11-20. Connect heating cable to output relays 1, 2 and 3 using terminals 3-8.

• 1-zone electric heating control with ETOR + ETF, output relays 1, 2 and 3 (fig. 4):Connect 2 (1) ETOR sensors to terminals 11-20. Connect 1 ETF sensor to terminals 21-32. Connect heating cable to output relays 1, 2 and 3 using terminals 3-8.
• 1-zone electric heating control and output control ( Y/∆) (fig. 5):
  Connect 2 (1) ETOG sensors to terminals 11-20. Connect external contactor/relays to output relays 1, 2 and 3 using terminals 3-8 (see wiring diagram, fig. 3).
• 2-zone electric heating control with ETOG, output relays 1 and 2 respectively (fig. 3): Connect 2 ETOG sensors to terminals 11-20. Connect heating cable for zone 1 to output relay 1 using terminals 3-4.
  Connect heating cable for zone 2 to output relay 2 using terminals 5-6.

• 2-zone electric heating control with ETOR, output relays 1 and 2 respectively (fig. 4): Connect 2 ETOR sensors to terminals 11-20. Connect heating cable for zone 1 to output relay 1 using terminals 3-4.
  Connect heating cable for zone 2 to output relay 2 using terminals 5-6.
• 1-zone water-based heating control:
  • Connect 1 ETOG sensor to terminals 11-16. Connect 1 ETF sensor to terminals 21-32. Connect 3/4-way mixing valve to terminals 21-24. Connect external supply voltage (24 V AC) for mixing valve to terminals 25-26.
  • Connect primary pump to output relay 1 using terminals 3-4.
  • Connect secondary pump to output relay 2 using terminals 5-6.

WIRING

WIRING
Terminal	Colour code	Wiring
PE, N, L		Supply voltage, 120-240 V AC 50/60 Hz
1, 2		Alarm relay (potential free) max. 5 A
3, 4		Output relay 1, 16 A (potential free), Heating cable 1 (zone 1) / Primary pump
5, 6		Output relay 2, 16 A (potential free), Heating cable 2 (zone 2) / Secondary pump
7, 8		Output relay 3, 16 A (potential free),
		Heating cable 3
11, 12	brown/green	Heating element 1+2, ETOG and ETOR
13, 14	grey/purple	Temperature sensor 1, ETOG
15, 16	yellow/white	Moisture sensor 1, ETOG / ETOR
17, 18	grey/purple	Temperature sensor 2, ETOG
19, 20	yellow/white	Moisture sensor 2, ETOG / ETOR
21, 22		3/4-way mixing valve, 0-10 V
23, 24		3/4-way mixing valve, 24 V AC
25, 26		Supply voltage 24 V AC for 3/4-way mixing valve

Terminal	Colour code	Wiring
27, 28		Supply water temperature sensor
29, 30		Return water temperature sensor
31, 32		Outdoor temperature sensor, ETF
33, 34		External standby input
35, 36		External override of heating input

Environment protection and recycling
Help protect the environment by disposing of the packaging and redundant products in a responsible manner.

Product disposal

Products marked with this symbol must not be disposed of along with household refuse but must be delivered to a waste collection centre in accordance with current local regulations.

Figures
Fig. 1 Installation of embedded sensor

1.  Sensor
2. Installation plate
3. Heating element

Fig. 2 Installation of ETOR gutter sensor and ETF outdoor sensor

1. Thermostat ETO2
2. Gutter sensor
3. Outdoor sensor

12637 South 265 West, Suite 100 Draper, UT 84020
Tel. 888.488.9276 · Fax: 801.948.7599 www.warmzone.com

Documents / Resources

WARMZONE ETO2 Electric Controller [pdf] Instruction Manual ETO2-xxxx, ETOG-55, ETOR-55, ETF-744-99, ETO2 Electric Controller, ETO2, Electric Controller, Controller

References

• User Manual