A hydronic floor heating system has been installed in your floor. Under floor heating will warm from the floor up giving you unparalleled feeling of comfort. This heating system is controlled by an electronic thermostat that has a floor or air sensor for optimum temperature control.
The sub-floor and screed have to be fully cured before turning the heating on. For sand & cement screeds you must wait at least 3 weeks before turning on. When turning on the floor for the first time, increase the floor temperature gradually over 2-3 days.
THERMOSTAT & SENSOR – 2 years
RECOMENDED TEMPERATURE SETTINGS
FLOOR TEMPERATURE [CERAMIC] – 23°C ~ 25°C FLOOR TEMPERATURE [CARPET] – 23°C ~ 25°C FLOOR TEMPERATURE [TIMBER] – 24°C max.
The MICROTEMP RANGE of electronic thermostats are specifically designed for underfloor heating systems. The thermostats are vertically flush mounted and have a 2pole isolator with 16A output relay.
ETN
The ETN thermostat is a home automation compatible thermostat. Mounted in the switch board (DIN rail) and utilises the set back temperature function.
Comfort Heat Australia Pty Ltd
www.comfortheat.com.au
sales@comfortheat.com.au
p: 02 9979 8600
f: 02 9979 7706
Temperature Settings
ETN has a temperature range of 0 to 35°C known as ‘set point’.
Light
The light indicates when the floor is drawing power ( heating ). When the red light is off this indicates that the floor is at your set temperature and will switch back on once the floor drops to your differential setting.
Differential
Differential is the temperature span between switching the thermostat on and off. Eg if the ‘set point’ is set to 25°C and the differential set to 3°C, the thermostat will switch off at 25°C and turn back on when the floor temperature reaches 22°C.
Setback
Setback allows you to remotely switch the thermostat to a default temperature by utilizing a home automations system (C-bus). Eg, if the ‘set point’ is set to 25°C and the set back temperature at 10°C, when the remote time clock switches the thermostat to the default setting the temperature will sit at 15°C. (with the same differential)
Set Up
Initially, adjust ‘set point’ to maximum temperature and leave on until the desired floor temperature is achieved. At this stage turn the ‘set point’ control back until the red led just goes out. (this will help you get a feel for your ideal temperature setting)
Monitor this situation for 24 hours to achieve correct floor temperature.
APPLICATION OF THE THERMOSTAT
ETN is an electronic thermostat with a built-in relay for switching heating cables, contactors, pumps, solenoid valves, fans etc. The setback temperature is activated via an external time switch.
ETN IS AVAILABLE IN SEVERAL VARIATIONS
With 16 amp S.P.S.T. contact, fed from the thermostat supply voltage, with built-in interrupter.
With 16 amp S.P.S.T. contact, fed from the thermostat supply voltage.
ETN-1442
(setback temp. 6-20°C) without sensor
With 10 amp voltfree change-over contacts.
OJ Electronics A/S declare under their own responsibility that this product meets the requirements of the European Council’s directive 89/336 and successive modifications as to electro-magnetic compatibility and the Council directive 73/23 as to electrical equipment to be applied within certain voltage ranges.
Standards applied
EN 61000-6-3 EN 61000-6-2, EN 60 730-1 and EN 60 730-2-9.
The product may only be energised when the entire installation meets the current directive requirements.
When the product is installed according to this instructions guide and the current installation guidelines, it is covered by factory guarantee. If the product has been exposed to damage e.g. in transport, it must be checked and overhauled by qualified staff before the product is connected to the power.
ETN thermostat is maintenance free ETN is also available for 24V.
MOUNTING OF SENSOR
Floor sensor: The floor sensor is placed in a conduit which is embedded in the floor. The pipe is sealed at the end and placed as high in the concrete layer as possible.
Room sensor: The room sensor is mounted on a standard wall box, or directly in the wall.
NB! Avoid placing the room sensor on an outside wall, above a radiator, or where it can be affected by direct sunlight.
The sensor cable may be extended by up to 50 m with separate cable. Two conductors in a multi-conductor cable, for example such as setting used for supply for a connected heat cable, may not be used. Avoid laying the sensor cable parallel to cables which can induce signals/noise on the sensor signal, and thus disturb the thermostat’s function.
If the cable is used with screen, the screen may not be connected to the ground, but must be connected to terminal 8.
The best installation is achieved with a separate cable for the sensor.
ETN is suitable for mounting on DIN rail. To cover the terminals, use ETNK wall box. The power supply, load, and sensor cables should be connected as shown in fig. 1-3. All supplies must be taken from a single phase, with suitable fusing.
ETN has a scale range of 0 to 35°C. To help the setting, the ETN has a red LED which is lit when the relay is energised (calling for heat). Move the setpoint to the maximum until the required room or floor temperature is reached. Then turn the setpoint knob back until the LED goes off. Fine adjustments may be required after 24/28 hours once the heating system has stabilised.
ADJUSTMENTS OF DIFFERENTIAL
The differential is the temperature span between the OFF switching of the thermostat and the temperature at which it switches ON again. This temperature span can be adjusted by the DIFF knob. The differential setting will always operate below the setpoint. Thus, if the setpoint is 24°C, and the differential is set at 5°C, the thermostat will switch OFF at 24°C and back ON at 19°C. We recommend that for floor heating, which generally has a slow response time, the differential is set to a low figure. For fast heat response systems, the differential can be set to a higher figure.
SETBACK TEMPERATURE
This is activated by the closing of an external contact e.g. from a time switch. The time switch can setback more than one ETN, see fig. 4.
(NB! The time switch contact must be volt-free).
The amount of setback is selected on the knob marked with a moon (or piggy bank).
Recommended for control of under-floor heating and electrical heating.
ETN
ETV
ETV WITH SETBACK MODE
| ETV-1990 | Thermostat (sensor is ordered separately) |
| ETV-1991 | • incl. floor sensor 3 m |
| ETV-1999 | • incl. remote room sensor |
ETN WITH SETBACK MODE AND INTERRUPTER
| ETN-2P-1441 | Thermostat (sensor is ordered separately) |
| ETN/F-2P-1441 | • incl. floor sensor 3 m |
| ETN/F-2P-1449 | • incl. remote room sensor |
ETN / ETV, SPECIAL VERSIONS
| ETV-1991-P | Thermostat incl. floor sensor 3 m |
| with potential-free contacts, 16A | |
| ETN-1442 | Thermostat with adjustable setback (+6/+20°C). |
| Delivered without interrupter. | |
| Sensor is ordered separately. | |
| ETN-1441-P | Thermostat with potential-free contact, 10A. |
| Delivered without interrupter. | |
| Sensor is ordered separately. |
ACCESSORIES
| ETGK | Cover box for ETV for wall mounting |
| ETNK | Cover box for ETN for wall mounting |
| ETF-144/99A | Floor sensor 3 m |
| ETF-944/99-H | Remote room sensor |
| MM-7595 | Electronic day/week timer for DIN-rail |
Type ETV and ETN are electronic on/off thermostats with control of temperature by means of an NTC sensor. Red LED indicates when heating is on.
Temperature setback
Type ETN and ETV are with setback mode, which is activated with a day/week timer, e.g. MM-7595.
The timer is programmed with the required comfort and setback periods.
Setback mode of type ETV is fixed 5°C.
Setback mode of type ETN can be adjusted +3/+10°C.
Built-in 2-pole interrupter
Type ETN is with built-in 2-pole interrupter.
Differential
Type ETV is fixed 0.4ºC.
Type ETN is adjustable 0.3/6ºC.
Type ETV
Type ETN
OJ ELECTRONICS A/S STENAGER 13B DK-6400 SØNDERBORG
DENMARK
T. +45 73 12 13 14
F. +45 73 12 13 13
OJ@OJELECTRONICS.COM
WWW.OJELECTRONICS.COM
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