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This manual ensures safe and efficient use of the “thermio™ eco C2” thermostat (referred to as “device” in the following). This manual is a component of the device and must remain accessible at all times for everyone who uses the device. Everyone who uses the device must have read and understood this manual before commencing any work.
Overview....................6 Design and function......................6 Contents..........................15 Safety....................16 Installation.................... 20 On-wall mounting....................... 21 Inserting the battery......................31 Operation..................... 36 Prior to operation........................ 36 Setting the frost protection temperature................40 Setting the temperature setpoint..................41 Setting the date/time......................42 Programming periods......................
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Activating/deactivating the holiday function................. 47 Selecting the background lighting..................48 Replacing the battery................50 Disposal....................57 Technical data..................59 α λ Ω...
Overview Design and function Design Fig. 1: Front and side view...
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SELECT button MODE button Boost button RESET button ADV. button Selection switch for operation, time and Holiday button programming Plus/minus buttons Cover The “thermio™ eco C2” thermostat is used to regulate two heating circuits. Hot water or heating cir- cuits can be connected and regulated independently of each other. Individual regulation of, for example, central heating and hot water is implemented using two independent switching outputs.
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Fig. 2: Rear view (without mounting plate) and mounting plate Frost protection function (jumper) Programming mode Temperature regulation function (jumper) Mounting plate Battery compartment...
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Temperature regulation function (for heating systems only) If the temperature regulation function (Fig. 2/3) is activated, the device measures the room temperature and regulates to an individually adjustable temperature setpoint Ä Chapter "Prior to operation" on page 36. The temperature regulation function (Fig. 2/3) and the frost protection function (Fig. 2/1) are activated and deactivated by means of what are known as jumpers.
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24 h - Use the same programming for each day - Days are programmed independently of each other 5/2 d - Use two programs, one for weekdays (Monday to Friday) and one for the weekend (Saturday, Sunday) The following periods are pre-installed on delivery: P1 On P1 Off P2 On...
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On delivery, the 7 d programming for all seven days of the week is used. The active temperature regulation function takes the programmed periods into consideration, provided that the temperature setpoint is maintained. If the room temperature deviates from the temperature set- point, the temperature regulation function switches on and overrides the programmed periods once for the deviation.
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Info on display Function ON 3 2 1 OFF The device switches 2 periods each day. P1 and P3 are executed, P2 is ignored. ON 3 2 1 OFF The device switches 1 period each day, from the first on-period to the last off-period (P1 On – P3 Off).
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Pressing the Boost button once extends/activates the period for one hour. Additional function ADV. button (Fig. 1/3) inverts the active period. The programmed periods are not affected. • ADV. during on-period: switches the active period off until the next programmed on-period •...
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On delivery, the frost protection function is activated and set to a temperature of +10°C. The frost pro- tection function can be deactivated on the rear of the device. The temperature of the frost protection function can be set to between +5°C and +20°C Ä Chapter "Setting the frost protection temperature" on page 40.
Contents The following components are included in the contents: Number Designation Thermostat thermio™ eco C2 Screws (3.5 x 25 mm) Screws (3.5 x 20 mm) Wall-plugs (5 x 25 mm) Jumpers Lithium battery of type 3V CR2032...
Safety Safety instructions Safety instructions are indicated in this manual by symbols. The safety instructions are introduced by signal words that express the extent of the danger. This combination of symbol and signal word indicates a potentially dangerous situation that may result in death or severe injuries if the situation is not avoided.
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This combination of symbol and signal word indicates potential dangers for the environment. ENVIRONMENT! Tips and recommendations This symbol highlights useful tips and recommendations, as well as informa- tion for efficient and fault-free operation. Intended use The thermostat may only be used for timer regulation (optionally for temperature regulation) of heating systems and hot water circuits in a temperature range from +5°C to +35°C.
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• Domestic heating technology for heating and water heating • Pump-controlled central heating systems • Gravity heating systems The intended use also includes compliance with all information specified in this manual. Any use other than the intended use is considered incorrect use. The legal warranty is voided by any interference with, or modifications to, the device.
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Danger to life due to electric shock! Improper assembly and installation of the device may result in life-threat- ening electrical voltages. WARNING! − Have assembly and connection performed by a qualified electrician only. Personnel requirements Qualified electrician Professional training, knowledge and experience, and knowledge of the relevant standards and regula- tions allows the qualified electrician to perform work on electrical systems and to identify, and avoid, potential dangers of their own accord.
Installation Installation location In order to ensure fault-free measurement by the room thermostat, choose the right installation location. Fig. 3: Installation location requirements...
On-wall mounting The device can be mounted on the wall or in a flush-mounted socket. If installed in a flush-mounted socket, no holes are drilled and the mounting plate is attached directly onto the flush-mounted socket with the screws. Danger to life due to electric shock! Improper assembly and installation of the device can lead to life-threatening electrical voltages.
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Danger of material damage to the wires in the wall! Selecting the wrong installation position can result in material damage to the wires in the wall. NOTICE! − Make sure that there are no wires in the wall at the installation position. Personnel: •...
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Prerequisite: • The terminals for the flexible wires must have a cross-section between 1 mm² and 2.5 mm². • If installing in a flush-mounted socket, make sure that the flush-mounted socket has been installed correctly and is dust-free.
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Installing the mounting plate Fig. 4: Removing the mounting plate from the housing...
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Undo the screws (3.5 x 20 mm) on the housing. The screws in the housing are captive, in other words you can loosen them but you cannot remove them.
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Remove the mounting plate. Fig. 5: Cable feed-through Mark the hole pattern from the mounting plate (Fig. 5/1 and 2) onto the wall. Drill holes at the points you marked (5 mm diameter and at least 25 mm deep).
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Insert the wall-plugs provided into the holes. Electric connections Strip the insulation from the connection wire. • Stripping length: 8 mm Thread the connection wire into the device through the cable feed-through (Fig. 5/3). Fig. 6: Wiring diagram Heating circuit Hot water NC Normally closed contact NO Normally open contact...
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To ensure wiring is correct, consult the operating manual for the heating system in use. Insert the connection wire into the corresponding terminal in accordance with the wiring diagram (Fig. 6).
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Tightening torques To avoid damage and faulty contacts, tighten the terminals using a torque of 0.6 Nm. NOTICE! Tighten all terminals using the Phillips screwdriver. Fig. 7: On-wall mounting...
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10. Attach the mounting plate to the wall-plugs with screws (3.5 x 25 mm). ð The mounting plate is now installed.
Inserting the battery Handling batteries Risk of injury if batteries are handled incorrectly! Incorrect handling of batteries can result in a risk of batteries exploding or harmful liquids escaping from the batteries. WARNING! − Never attempt to charge batteries. − Never damage or deform batteries.
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− Make sure that batteries are inserted with the correct polarity.
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Inserting the battery Personnel: • User Special tool: • Flat-head screwdriver Materials: • 1 lithium battery of type 3V CR2032...
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Fig. 8: Lifting up the battery compartment On the rear of the device, carefully lift up the battery compartment with a flat-head screwdriver (Fig. 11/1). Pull the battery compartment out with your finger.
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Fig. 9: Inserting the battery Insert a battery with the correct polarity (Fig. 12). Re-insert the battery compartment.
Operation Prior to operation Prior to operation and programming, the following three functions must be preset: • Programming mode (Fig. 2/2) • Frost protection function (Fig. 2/1) • Temperature regulation function (Fig. 2/3) On delivery, the jumpers for the frost protection function and temperature regulation function are already inserted.
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Personnel: • Qualified electrician Special tool: • Phillips screwdriver Materials: • Jumper • Screws (3.5 x 20 mm) Deactivate frost protection (optional): Remove jumper from the opening for the frost protection function (Fig. 2/1). ð Frost protection function is deactivated. Deactivate frost protection (optional): Remove jumper from the opening for the temperature regulation function (Fig.
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Installing the housing Danger of material damage to the wires! When closing the housing, there is a risk of pinching wires. This results in material damage to the wires. NOTICE! − To avoid damage and faulty contacts, make sure that the wires are not pinched when the you close the housing.
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Activating the settings Do not use a pencil or similarly fragile object to press the RESET button. Use a thin, non-metallic blunt object to press the RESET button. The device starts automatically. ð You have to reset the device with the RESET button each time you remove or insert a jumper.
Setting the frost protection temperature Personnel: • User Prerequisite: • Selection switch (Fig. 1/8) is set to RUN. • A jumper is inserted in the opening for the frost protection function (Fig. 2/1). Open the cover and fold it down. Press multiple times in succession until both circuits are set to OFF.
Setting the temperature setpoint Personnel: • User Prerequisite: • Cover is open. • A jumper is inserted in the opening for the temperature regulation function (Fig. 2/3). Press multiples times in succession until one of the operating modes ON, 1, 2 or 3 is selected.
Set the desired frost protection temperature using The frost protection temperature can be set to between +5°C and +20°C. Press to save the frost protection temperature. Set the desired temperature setpoint using The temperature setpoint can be set to between +5°C and +35°C. Press to save the temperature setpoint.
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Personnel: • User Prerequisite: • Cover is open. Slide the selection switch (Fig. 1/8) to CLOCK SET. The display turns on. ð Set the year with and save it with Set the month with and save it with Set the day with and save it with Set the hour with and save it with...
Programming periods To keep the water and room temperature at a constant level, the system is switched on and off for periods of time. There are a total of three periods available for each day, and each can be programmed individually.
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Periods for heating circuit Press to program periods for the heating circuit. Set the time for P1 ON with and save it with Set the time for P1 OFF with and save it with Repeat steps 6 and 7 for the following two periods. Three periods are programmed for regulating the heating circuit.
11. Slide the selection switch (Fig. 1/8) to RUN. The device regulates according to the times entered. ð If the temperature regulation function is active, the device regu- lates according to the temperature setpoint set by the user. If the room temperature deviates from the temperature setpoint, the temperature regulation function switches on and overrides the programmed periods once for the deviation.
• Cover is open. Press the SELECT button for the circuit in question multiple times until the desired operating mode is selected on the display. Press the SELECT button once to switch to the next operating mode, e.g.: In operating mode ON 1 2 3 OFF ð press the SELECT button twice to activate operating mode ON 1 2 3 OFF...
• Cover is open. • Selection switch (Fig. 1/8) is set to RUN. Press Set the length of the holiday with and save it with The device is switched off for the specified period. ð Selecting the background lighting There are two setting options for the background lighting. AUTO - Background lighting automatically switches on for ten seconds when any button is pressed.
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• Cover is open. • Selection switch (Fig. 1/8) is set to RUN. Press and hold for five seconds. Press to select the setting option. Press The selected background lighting is now activated. ð...
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Handling batteries Risk of injury if batteries are handled incorrectly! Incorrect handling of batteries can result in a risk of batteries exploding or harmful liquids escaping from the batteries. WARNING! − Never attempt to charge batteries. − Never damage or deform batteries. −...
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Replacing the battery If the batteries are flat, the battery symbol appears on the display. • Replace the batteries as soon as they are flat or after a longer period of non-use. • When you replace the batteries, the data is temporarily stored for 10 minutes by gold foil capaci- tors.
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Personnel: • User Special tool: • Flat-head screwdriver Materials: • 1 lithium battery of type 3V CR2032...
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Fig. 10: Removing the housing from the mounting plate Undo the screws on the housing. Remove the housing from the mounting plate.
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Fig. 11: Lifting up the battery compartment On the rear of the device, carefully lift up the battery compartment with a flat-head screwdriver (Fig. 11/1). Pull the battery compartment out with your finger. Remove used batteries and dispose of correctly.
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Fig. 12: Replacing the battery Insert a new battery with the correct polarity (Fig. 12). Re-insert the battery compartment. Place the housing on the mounting plate and screw it on tight.
Disposal Improper disposal Incorrect disposal presents an environmental danger. Incorrect disposal could result in environmental dangers. − Electric scrap and electronic components must be disposed of correctly, ENVIRONMENT! i.e. the parts for disposal must be sorted into material groups. − Batteries/rechargeable batteries (Directive 2006/66/EC) and electrical or electronic scrap must under no circumstances be disposed of with gen- eral waste.
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Recycling If no agreement has been made covering return or disposal, ensure that the dismantled components are recycled: • Scrap metals. • Ensure plastic elements are recycled. • Dispose of other components after sorting them according to material properties.
α λ Ω Technical data Electrical data Supply voltage AC 230 V ±10% 50 – 60 Hz Battery replacement time (power reserve) > 30 days (programs saved in EEPROM) Switching output Changeover contact, potential-free Switching capacity – resistive load 3 A/250 V AC Switching capacity –...
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α λ Ω Electrical data Control range +10°C (frost protection +5°C to +20°C) +5°C to +35°C Control accuracy ±0.5°C Sensor (thermistor) 100 K (at 25°C) NTC Rated impulse voltage strength (Uimp) 4 kV Electrical connection Device Screw terminals with wire protection, max. 2.5 mm²...
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α λ Ω Operating data Operating mode RUN/AUTO Manual switch Boost time Channels Programs 7 days 5/2 days 1 – 7 days Advance Boost Holiday program Individual programming (max. 3 ON/OFF switching times)
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α λ Ω Operating data Daily program (ON/OFF) Weekly program (ON/OFF) Display and format Resolution Room temperature: 0.1°C Temperature setpoint: 1°C Time of day: 1 minute Display lighting Light blue Time display format 12 h format (AM/PM) 24 h format Shortest switching time Boost: 1, 2, 3 hours...
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α λ Ω Display and format ON/OFF: 10 minutes Programming time: 10 minutes Room temperature display +10°C to +50°C Summer/winter time Automatic summer/winter clock change Time Digital Status display Operating mode Status display for heating (lamp) Ambient conditions Humidity (in operation) 10% to 90% relative humidity, condensation-free Humidity (storage) 10% to 90% relative humidity, condensation-free...
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α λ Ω Ambient conditions Temperature (in operation) +0°C to +50°C Temperature (storage) -20°C to +50°C General data Colour White/grey Weight 330 g Material ABS plastic Size 125 x 89 x 35 mm Installation Wall-mounted or flush-mounted socket...
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α λ Ω Compliance with standards ErP class ErP function ON/OFF room thermostat ErP description Room thermostat that regulates the on/off state of a heating device ErP contribution to seasonal space heating energy efficiency IP code IP20 Protection class II, when installed accordingly Certification mark Energy Saving Trust...
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α λ Ω Compliance with standards Pollution degree Standards and directives Mode of operation and additional properties: Type...