Categories: COINTRA

COINTRA TDD Plus 100 Electric Water Heater Instruction Manual

Instructions for installation, use, and upkeep
TDD plus 30
TDD plus 50
TDD plus 80
TDD plus 100


– Water heated to over 50 °C can cause serious, immediate burns if it comes directly out of the taps. Children, disabled persons, and the elderly are, particularly at risk. We recommend you fit a thermostatic mixing valve to the water supply pipe, marked red.
– The water temperatures inside the heater can reach up to 80 °C. Take care to adjust the water temperature in the tap by mixing it with cold water, inserting your hands only. Do not let the water come into contact with the rest of your body directly at first.
– The unit must be installed and set up by a qualified technician in compliance with local laws and health and safety regulations.
– Any fault that occurs affecting electrical components must be checked and repaired by the Authorized Technical Service only.
– During winter, if the heater is going to be disconnected from the power supply for a long period of time, the water tank can be emptied to prevent damage from freezing, if this risk applies. Please remember to turn off the heater before emptying it.
– If the power cable is worn or frayed, it must be replaced by the manufacturer, its after-sales service, or persons qualified to do so, to prevent any possible danger.
– Ensure that the electrical installation is fitted with the mandatory differential switch in compliance with regulations.
– The electric heater must be installed in such a way that any person who is taking a bath or shower does not have to use the switches and other set-up devices, maintaining 0.6 meters between the electric heater and the bath or shower.
– This unit may be used by children aged 8 years and up and by persons with impaired physical, sensory or mental abilities or lack of experience or knowledge, provided they are given the appropriate supervision and instructions to use the heater in a safe manner and they understand the hazards associated with its use.
This unit is not a toy. Children must never play with it. The cleaning and maintenance to be carried out by the user must not be done by children without supervision.
– The hot water temperature is controlled by a thermostat that also acts as a safety device that can be re-armed to prevent dangerous overheating.
– Do not tamper with the excess pressure safety device, only move it from time to time to ensure that it is not stuck and eliminate any dirt or grease that may have been deposited on it; the device intake tube must be fitted with a safety device that complies with the relevant standard, calibrated to a maximum pressure of 0.8 MPa, to include at least: a tap, retention valve, safety valve, and hydraulic load cut-off.
– It is normal for water to drip from the excess pressure safety device and the EN 1487 safety device when the unit is heating up. For this reason, a drain must be fitted that is in the open air, with a pipe continuously tilted downwards, in an area that is not subjected to sub-zero temperatures.

Dear Customer.
Thank you for purchasing our TDD plus electric immersion heater from COINTREAU. The TDD plus electric immersion heater from COINTREAU is designed and manufactured in accordance with the IEC international standard for electrical domestic appliances. The product is of the highest quality to international standards. We are therefore confident that this electrical immersion heater can fully meet your needs and enhance your family’s quality of life.
Please read this manual carefully before use and keep it in a safe place.
This product complies with the Directive 2012/19/EU.
The symbol of the crossed-out litter bin on the unit and its packaging means that the product must be disposed of separately from other waste at the end of its useful life. Therefore, the user must hand in the product to a certified waste disposal facility for electro-technical and electronic products at the end of its useful life. Alternatively, the user may return the product to the retailer when purchasing a new product of an equivalent type. Electronic products whose dimensions are smaller than 25 cm can be handed into any distributor of electronic products whose shop floor surface area is at least 400 m2 for free disposal and with no obligation whatsoever to purchase a new product. , The selective collection of waste for recycling and the treatment and scrapping thereof, if compatible with environmental protection, contribute to the prevention of harm to the environment and promote reuse and/or recycling.


  • Glass insulation, water-electrical insulation The heating element is insulated with high-insulation glass powder; it yields high heat conduction and high heat stability as filler material and serves to insulate the heating filament completely from the wall of the tube as well as ensuring that the insulation is leak-free.
  • Multiple protection This product is fitted with multiple safety features such as automatic constant temperature, anti-overheating, anti-scorching, anti-power surge, anti-freeze.
  • Blue silicon glass container The enamel pulverization machine, controlled by a computer, lays a uniform sheet of special silicide on the surface of the container, which will melt on the container’s steel wall after high-temperature sintering at 850 °C so that the container is completely coated and therefore resistant to impacts, high-pressure and anti-oxidants, which considerably extends the water heater’s useful life.
  • Magnesium anode bar. The unit has a strong magnesium anode bar for protection, anti-corrosion and de-scaling to provide soft water, which is good for the health of one’s skin and extends the useful life of the electric heater.
  • Smooth operation With peripheral temperature adjustment and a closed structure, it can supply water to several places at the same time. This product is suitable for hot water used in the home.

Diagram of the Electric Heater and its Component Parts

  1. Control box
  2. Control panel
  3. Hot water outlet
  4. Coldwater inlet
  5. Outer shell
  6. Insulation layer
  7. inner tank
  8. Heating element
  9. Magnesium anode
  10. Thermal cut-out

Technical  Characteristics

Model TDD plus 30 TDD plus 50 TDD plus 80 TDD plus 100
Storage volume (V) I 30 50 80 90
Weight when filled with water” Kg 48. 75. 112. 125.
Temperature adjustment range °C 4080
Maximum working pressure of the internal tank MPa 0.8
Power supply 230V-50Hz
Nominal power output kW 2.
Dimensions mm 462x248x679 462x248x991 542x288x1092 542x288x1194
Declared load profile S M M M
Water heating energy efficiency class B B B B
Water heating energy efficiency (nom) % 35 39 39 39
Annual Electrical Consumption (AEC) kWh 527 1316 1316 1316
Acoustic power level (LwA) dB 15
Daily electricity consumption (fast) kWh 3. 7. 8. 8.
Mixed water at 40 °C (V40) I 80 135 155
Settings for the thermostat temperature and water heater, as placed on the market. °C 70
Type of fitting Vertical and Horizontal

*To take in mind when anchoring the unit to a wall
The energy consumption data and other information given in the Product Datasheet are defined in relation to EU Directives 811/2013 and 814/2013. The device is equipped with a smart function that allows it to adapt to the consumption of each user profile. If operating correctly, the device has a daily consumption of “QElec” (“less than that of an equivalent product without a smart functionality”).

TDD plus 30 TDD plus 50 TDD plus 80 TDD plus 100
A 462 462 542 542
B 274 274 314 314
C 679 991 1092 1194
D 142 142 162 162
E 440 585 769 769
F 240 240 240 240
G 1/2″ 1/2″ 1/2″ 1/2″
H 367 367 439 439
L/L1+L2 200 345 500 200+300


The unit must be installed and set up by a qualified technician in accordance with the rules laid down by local health and safety regulations, such as the “Low voltage Electro-Technical Regulations”, the Technical Building Code, and relevant local regulations.
The unit heats water to a temperature below boiling point. It must be connected to the main water supply that is compatible with the unit’s performance levels and capacity. Before connecting the water heater, the following steps must be carried out: – Check that the characteristics (see data plate) meet the customer’s requirements. – Read the instructions on the packaging label and on the unit’s data plate.
Installing the water heater
This unit has been designed to be installed inside buildings only, in accordance with current regulations. Furthermore, installers are asked to follow these recommendations in the presence of:
-Humidity: Do not install the unit in closed (unventilated) or damp/humid spaces.
– Freezing conditions: Do not install the unit in areas where the air temperature may drop to critical levels and there is a risk of freezing conditions.
– Sunlight: Do not expose the unit to direct sunlight, even if there are windows.
– Dust/vapors/gas: Do not install the unit if particularly hazardous substances are present, such as vapors, dust, or gas saturates.
– Electrical discharges: Do not install the unit directly connected to electrical power sources that are not protected against surges.
Location for installing the unit
It is convenient to install the heater as close as possible to the water mains supply to minimize heat loss from the pipes. TDD plus water heaters are always installed with downstream water connections. To facilitate inspection and internal cleaning, free space must be left off at least 25 cm between the protective cover (pos.1) of the heater and any fixed obstacle.
In the case of brick or cavity block walls, partition walls with limited static or any kind of brickwork other than those mentioned, a preliminary inspection must first be conducted of the system to be used to mount the unit.
Installation Procedure:

  1. Ensure that the surface of the area where you are going to mount the heater can support four times the weight of the heater when filled with water.
  2. Use a power drill to make the holes to a depth of at least 90 mm in the wall. These holes must be level on the same line.
  3. Insert two wall plugs in the hole, screw in the screw hooks and place them facing upwards, then raise the electric heater and aim for the hooks, fasten it firmly into position and check the wall plugs are not loose to ensure that the electric heater is firmly mounted.

TDD plus 30 TDD plus 50 TDD plus 80 TDD plus 100
E(mm) 463 608 794 794
F(mm) 240 240 240 240
L(mm) / / / 300
J/J1+J2(mm) 200 345 500 200+300

Horizontal type
Note: In particular, if you need to install the heater in a bedroom or bathroom, the specified installation space must be complied with: Prohibited Space and Protected Space

No switches, power sockets or lighting may be installed in the prohibited area. 
No switches may be installed in the protection area but safety power sockets may be installed there.


Connect the water heater intake and outlet with pipes or accessories that are able to withstand temperatures over 100°C at a pressure that exceeds working pressure (8 bar). Therefore, we strongly recommend that no materials should be used that cannot withstand high temperatures.
When fitting the water pipes follow the basic rules to prevent corrosion: “Do not use copper before iron or steel in the direction of the water flow”. To prevent galvanic pairs and their destructive effect, use Teflon tape to thread the insulating hoses supplied with the heater to its two pipes.

Thread the cold-water intake pipe (blue) to the electrolytic hose and from this to the hydraulic safety sub-assembly with the draining device supplied with the heater. Fit a cut-off valve to the cold-water supply pipe.
IMPORTANT: the cut-off valve must always be in the open position whenever the heater is switched on,
Some countries require alternative safety devices to be used and there may other requirements under local regulations: the installer must check the suitability of the safety device that he or she tends to use. Do not fit the cut-off device (valve, tap, etc.) between the safety unit and the heater itself.
Connect the hot water distribution pipe to the hot water outlet pipe insulating hose (red) from the heater.
The hydraulic safety valve or assembly supplied with the water heater is fitted with a retention and overpressure valve. The latter opens to a maximum of 8 bars. If the pressure in the water installation exceeds 5 bars, fit a pressure reducer, as per regulations.
Likewise, it is essential to attach the drainage nozzle of the safety valve (2) to a drain, using the siphon evacuation tube supplied. This conduit must be visible and sloping towards the drainpipe.
Description of the safety valve
3- Device for emptying water from the heater
4- Water draining outlet


Before installing the unit, we recommend that you check the electrical system very carefully to ensure that it complies with the relevant regulations. The manufacturer accepts no responsibility for any damage caused by the lack of a grounding to earth or a problem related to the power supply.
Ensure that the voltage used is 230 V / 50 Hz.
Check that the main power supply is rated for the heater’s maximum power consumption (Refer to the technical characteristics plate) and that the electrical cables and wiring are suitably rated and regulated.
Ensure that the electrical installation is fitted with the mandatory differential switch in compliance with regulations.
Fill the water heater, opening the cold-water cut-off valve and the hot water taps. When water comes out of the taps, turn them off, starting with the lowest one (bidet) and ending with the top one (shower). In this way any air in the heater and pipes can be bled off.
The heater must be filled with water before its first use (or after any maintenance or cleaning) and after it has been connected to the power supply. DO NOT SWITCH ON THE POWER unless it is full, as this could damage the resistance.


1- Power key
2- ECO model
3/5 Adjustment key
4- Temperature indication
6- WIFI model


  1. ” button: – Plugin: Red LED – Antifreeze:flashing LED(red)
  2. ” button: Turn on or off the smart function, turn on the green light when starting, and turn off the light when closing
  3. ” < ” button: Lower the set temperature
  4. Temperature indicator: Red LED
  5. The ” > ” button: Raise the set temperature
  6. WIFI button: Press and hold for 3 seconds to enter the distribution network mode, and WiFi will flash. If the distribution network is successful, the WiFi light will be on.

Plug the heater into the 230 V / 50Hz power outlet. The first time it is plugged in. The ° (  ) “LED(1) will light up red. Press the button ”  ” to turn on the unit. The first time the unit is switched on, the temperature will be pre-set to 70r
During the warm-up phase, the LEDs that display the temperature reached by the water remain to light up permanently, the set temperature LED flashes until the set temperature is reached (they stop flashing once the temperature is reached and remains constant).
However, if the set temperature is lower than the actual temperature, the set temperature will always flash.
If the temperature drops, for example after hot water has been used, it automatically starts to heat the water again and the LEDs between the last fixed light and the light displaying the temperature setting will resume progressively.

During the warm-up phase, you may hear a slight noise as a result of the water heating process.
The TITAN TWIN heater has 2 operating modes: Manual and Smart ”
Smart Function ”
” Press  ee to activate the “Smart function”. The ECO LED(2) will light up. If the manual mode is combined with the “Smart function”, the product will automatically adjust the temperature. This means that the manual model will be deactivated.
To switch off the function, press the button and the ECO LED will go off. If you want to adjust the temperature manually, you will need to turn off the Smart function
Smart function ” ” -Description
The smart function is a software application that learns about the user’s consumption, which enables it to minimize heat loss and maximize energy savings.
The smart software undergoes a learning period of one week from the time that the electric heater commences operation at the temperature set and it records the user’s demand for energy.
From the second week on, the learning process continues to learn about the user’s needs in more detail and changes the temperature every hour to adapt it to the actual demand in order to improve energy saving. The “smart” software “Smart” “activates water heating for the time determined automatically by the heater depending on the user’s consumption. During the day, when there is no demand for water, the heater still ensures that there is a reserve supply of hot water available at 45 °C.
To ensure that the smart function operates appropriately, do not disconnect the heater from the main power supply.

The anti-Legionella function is turned on by default.
To turn off the anti-Legionella function, press the ” > ” and ” < ” buttons for 3 seconds. Once the deactivation is confirmed, the 40-75°C indicator light will be off.
To turn on the anti-Legionella function, press the “> ” and ” < “buttons for 3 seconds. Once the activation is confirmed, the 40-75°C indicator light will be on.
When the anti-bacteria cycle is operating, the set temperature is 75°C.
The first time this function is activated (or if the water heater has been switched off), wait 3 days for it to start to work; once the cycle has been completed, it will repeat itself every 30 days, provided it is not set to operate at 75°C or 80°C, in which case the 30-day cycle will re-set.
This function can work in conjunction in normal or in Smart operation mode.


Legionella are small bar-shaped bacteria that are a natural constituent of all freshwater. Legionnaires’ disease is a serious pneumonia infection caused by inhaling the bacteria Legionella pneumophila or some other species of Legionella. These bacteria are frequently found in domestic systems, in hotels and other water systems, and in water used for air conditioning or air cooling. Therefore, the main approach to combat this is prevention, by controlling the organisms present in water systems.
To restrict the growth of Legionella:
Water temperature between 25 °C and 50 °C. To restrict the growth of Legionella bacteria, the water temperature must be within a range at which the bacteria either do not grow at all or grow very little, whenever possible. Otherwise, the drinking water installation needs to be disinfected using heat treatment.
Water stagnation. To avoid there being long periods when the water may become stagnant, the water in each part of the drinking water installation must be used or rinsed at least once a week.
Regarding the water stored in this water heater, if:
1) The unit is switched off for a long period of time [months] or
2) The water temperature is kept constant within the range 25 — 50 °C, the Legionella bacteria may grow in the tank.
In such circumstances, reduce the proliferation of bacteria by carrying out a “heat disinfection cycle”.
Note: When the software carries out the heat disinfection treatment, it is likely that the electric water heater’s energy consumption will increase. The temperature of the water in the tank can cause serious burns immediately when the software is running the heat disinfection treatment. Children, disabled persons, and the elderly are particularly at risk of being scalded. Check the water temperature before taking a bath or shower.
In the event of a power failure or if the unit is switched off using the o button, the most recent temperature setting will stay in the memory, as well as its status (i.e. if it was on standby or running) and whether the anti-Legionella was activated or de-activated.
In any configuration procedure, if the user takes no action for 5 seconds, the last setting will be stored in the device’s memory.
The anti-freeze function will operate during cold weather and when the unit is not in use for a long period of time. The unit’s Anti-Freeze function is activated by default.
To ensure that the Anti-Freeze function operates appropriately, do not disconnect the heater from the mains power supply.
If there is a malfunction, the unit will enter “fault mode” and some LEDs on the control panel will flash simultaneously.
Re-start: To re-start the heater, power the unit off and on again . If the cause of the fault goes away immediately after the re-start process, the heater will resume normal operation. If this is not the case, some LEDs will continue to flash. Contact the Technical Support Service.
The type of malfunction is indicated by some LEDs as follows:
40 – 45°C LED + “0” flashing – Operating without water
40 – 50°C LED + “0” flashing – NTC temperature sensor broken
40 – 55°C LED + “0” flashing – Water overheating
All data and specifications indicated are non-binding; the manufacturer reserves the right to change, announce or replace them at its sole discretion. This product complies with REACH regulations.


This water heater has a Wi-Fi module integrated in the product, enabling connection to an external Wi-Fi router (not supplied) and therefore being controlled via smartphone APP. Depending on the availability of a smartphone with Android® or iOS® operating system, scan the corresponding QR code from the label placed on this product, or hereinbelow to download the OASIS Smart app:

Alternatively, is possible to search this app on Google Play Store or App Store app writing «oasissmart»to download it.
After installing it the following icon will be available on the smartphone menu:
Start the “OASIS Smart ” app on the smartphone by pressing the icon as indicated above.
To use the OASIS Smart app for the first time the user registration is required: create a new account —) enter an e-mail address —, enter the verification code received at that email address, and set the password to confirm.

Press the “Register” button to start the registration, enter an email address, press the “Get Verification Code” button, then, put it inside and set a password.
Instead in case of log out from this app or smartphone change, press “Log in” button, enter your account name and password, then, press Log In again.
Press the “+” button at the top right to add your product, then, select the water heater model “TDD plus”

Connect your smartphone to a 2.4 GHz Wi-Fi router, enter the app the Wi-Fi name and password, then, press next:

Make sure the water heater is powered and turned on.
Press for 3 s the Wi-Fi button on the water heater and when the Wi-Fi button flashes fast press “Confirm”, then, the “Next” button on the app to start the pairing mode.

Keep the smartphone close to the water heater while it will be connected to the Wi-Fi router and initialized for use.

If the procedure for connection with the Wi-Fi router was successful, you will see your device added as shown below.

Press on the icon of the equipment to access the control panel will be showing the current operating mode set (manual or ECO).
With the water heater in manual mode the control app panel appears like this:

Press on the symbol ” ” to select the ECO mode (the control app panel will appear like this).

With the ECO mode set, press on the symbol ” ” to select the “manual” mode.
In manual mode by pressing “+” and “-” buttons is possible to adjust the setpoint for hot-water in the range 40+80°C with 5°C steps.
In ECO mode the setpoint for hot-water is automatically calculated and set by the energy the smart function of this product.
During the water heating the symbol of a drop ” ” close to the water temperature value on the app it flashes.
The performing of the “Anti-legionella” cycle is shown by the symbol “ ” under the water temperature value on the app.
In case of malfunction due to: operating without water (E2: Drying heating fault), NTC temperature sensor broken ( E3: Temperature sensor fault), and water overheating ( E4: Overtemperature fault) , on the app is shown the corresponding fault warning:

From the app is also possible to turn on and turn off the water heater by pressing on the on/off symbol
” (the symbol is orange when the equipment is on).


Magnesium anode It is essential that the unit be inspected annually by the Technical Support Service (TSS) to eliminate limescale deposited on the heating element and check the condition of the magnesium anode (See point 6 ). If the water in your area is very hard or corrosive you must ask for more frequent inspections.
If the magnesium anode is degraded, it must be replaced by the Technical Support Service.
Draining the unit
If installed in a location where freezing occurs, the unit must be drained if it is not going to use.
When this is necessary, drain the heater as follows:
– Unplug the heater from the mains electricity supply;
– Turn off the valve from the water mains;
– Open the hot water tap (basin, sink or bath);
– Open the drainage valve.
Periodic maintenance
After routine or special maintenance, we recommend you fill the tank with water and drain it off completely to eliminate any residual impurities.
Safety valve
The pressure safety device must be activated on a regular basis (once a month) to eliminate limescale and ensure that it is not obstructed. This can be done with lever No. 1, the safety device for draining off water from the heater.
To clean the outside of the heater, use a damp cloth with soapy water. Never use abrasive products or those that contain solvents (for example, alcohol).


Avda. Italia, 2 (Edificio Ferroli) – 28820 Coslada (Madrid) – ESPANA
Tel.: +34 916 707 459.
Fax: +34 916 708 683
S.A.T. Tel.: 902 402 010 / 912 176 834

Documents / Resources

COINTRA TDD Plus 100 Electric Water Heater [pdf] Instruction Manual
TDD Plus 30, TDD Plus 50, TDD Plus 80, TDD Plus 100, TDD Plus 100 Electric Water Heater, Electric Water Heater, Water Heater, Heater

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