1. Introduction
This user manual provides essential information for the safe and efficient installation, operation, and maintenance of your Cointra TDD Plus 80 WiFi Electric Water Heater. Please read this manual thoroughly before attempting to install or use the appliance. Keep this manual for future reference.
2. Safety Information
Important Safety Instructions:
- Installation and servicing must be performed by qualified personnel only.
- Ensure the electrical supply matches the specifications on the appliance rating label.
- Always disconnect power to the water heater before performing any maintenance or service.
- Do not operate the water heater if it is damaged or malfunctioning.
- The pressure relief valve must be installed and regularly checked to ensure proper operation.
- Do not block or tamper with the pressure relief valve.
- This appliance is not intended for use by persons (including children) with reduced physical, sensory, or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety.
- Children should be supervised to ensure that they do not play with the appliance.
3. Product Overview
The Cointra TDD Plus 80 WiFi is an advanced electric water heater designed for efficient hot water supply in residential settings. It features a robust design, energy-saving capabilities, and integrated WiFi connectivity for remote control and monitoring via a dedicated application.

Image 1: Front view of the Cointra TDD Plus 80 WiFi Electric Water Heater, showing its sleek white casing and integrated control panel at the bottom.
4. Installation and Setup
4.1 Pre-Installation Checks:
- Verify that the installation location can support the weight of the water heater when full.
- Ensure adequate clearance for maintenance and proper ventilation.
- Confirm that the electrical supply meets the appliance requirements (230V AC, 1800W).
4.2 Mounting:
The water heater is designed for vertical installation. Securely mount the appliance to a load-bearing wall using appropriate fasteners. Refer to the included mounting template for precise drilling locations.
4.3 Plumbing Connections:
- Connect the cold water inlet to the designated port (usually marked blue).
- Connect the hot water outlet to the designated port (usually marked red).
- Install the pressure relief valve on the cold water inlet line, ensuring it is properly oriented and connected to a discharge pipe leading to an open drain.
- Open a hot water faucet in your home to allow air to escape while filling the tank.
- Slowly open the cold water supply valve to fill the water heater. Close the faucet once water flows steadily.
4.4 Electrical Connections:
Connect the water heater to a dedicated electrical circuit with appropriate overcurrent protection. All wiring must comply with local electrical codes and regulations. A qualified electrician should perform this step.
4.5 Initial Power-Up and WiFi Setup:
- After plumbing and electrical connections are complete and the tank is full, restore power to the water heater.
- The control panel will illuminate. Follow the instructions in the separate WiFi connectivity guide or the Cointra app to connect your water heater to your home network.
- Download the official Cointra application from your smartphone's app store.
- Register an account and follow the in-app instructions to pair your water heater.
5. Operating Instructions
5.1 Power On/Off:
Use the power button on the control panel or the Cointra app to turn the water heater on or off.
5.2 Temperature Adjustment:
Adjust the desired water temperature using the control panel buttons or through the Cointra app. The recommended temperature setting for optimal energy efficiency and safety is 60°C (140°F). The factory default thermostat temperature setting is 70°C.
5.3 WiFi App Functions:
The Cointra app allows you to:
- Remotely monitor the water heater's status.
- Adjust temperature settings.
- Set daily or weekly heating schedules.
- Activate energy-saving modes.
- Receive notifications and alerts.
Refer to the in-app help section for detailed instructions on specific features.
6. Maintenance
Regular maintenance ensures the longevity and efficient operation of your water heater.
6.1 Annual Checks:
- Pressure Relief Valve: Manually operate the pressure relief valve at least once a year to ensure it is not blocked. Follow manufacturer instructions carefully.
- Anode Rod: Inspect and replace the anode rod every 1-3 years, depending on water quality. This prevents corrosion of the tank.
- Drain and Flush: Drain and flush the tank annually to remove sediment buildup, which can reduce efficiency and tank life.
6.2 Cleaning:
Clean the exterior of the water heater with a soft, damp cloth. Do not use abrasive cleaners or solvents.
7. Troubleshooting
Before contacting service, review these common issues and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No hot water | No power, thermostat set too low, heating element failure | Check circuit breaker, adjust thermostat, contact service for element replacement |
| Water not hot enough | Thermostat set too low, excessive hot water usage, sediment buildup | Increase temperature, reduce usage, drain and flush tank |
| Leaking from tank | Loose connections, faulty pressure relief valve, tank corrosion | Tighten connections, check/replace PRV, contact service for tank issues |
| Error code on display | Internal fault | Refer to the Cointra app or contact customer support with the specific code |
If you are unable to resolve an issue, please contact qualified service personnel.
8. Specifications
| Feature | Specification |
|---|---|
| Brand | Cointra |
| Model | TDD Plus 80 WiFi |
| Manufacturer | COINTRA (Supplier: FERROLI S.p.A.) |
| Dimensions (L x W x H) | 70 x 30 x 30 cm |
| Weight | 37.86 kg |
| Power Type | Electric |
| Voltage | 230 Volts (AC) |
| Power / Heat Output | 1800 Watts |
| Special Features | WiFi Connectivity |
| Energy Efficiency Class | B |
| Annual Electricity Consumption | 1316 kWh/annum |
| Declared Load Profile | M |
| Water Heating Energy Efficiency | 39% |
| Sound Power Level (Indoors) | 15 dB |
| Thermostat Temperature Setting | 70°C |
| EPREL Registration Number | 1183008 |

Image 2: EU Energy Label for the Cointra TDD Plus 80, indicating an energy efficiency class B, annual electricity consumption of 1316 kWh, and a sound power level of 15 dB.
For more detailed product information, please visit the EPREL database.
9. Warranty and Support
Your Cointra TDD Plus 80 WiFi Electric Water Heater is covered by a manufacturer's warranty. Please refer to the warranty card included with your product for specific terms and conditions.
For technical support, service, or warranty claims, please contact:
- Manufacturer: COINTRA
- Supplier: FERROLI S.p.A.
- Website: www.cointra.es or www.ferroli.com
- Email: info@cointra.es
When contacting support, please have your product model (TDD Plus 80 WiFi) and serial number ready.





