Introduction
This manual provides essential information for the safe and efficient installation, operation, and maintenance of your Ariston Velis Tech Wifi 50 EU electric water heater. Please read this manual thoroughly before installation and use, and keep it for future reference.
The Ariston Velis Tech Wifi 50 EU is a high-efficiency electric water heater designed for domestic hot water production. It features a 50-liter capacity, 1500W heating element, and integrated Wi-Fi connectivity for smart control.
Important Safety Information
WARNING: Failure to follow these instructions could result in property damage, personal injury, or death.
- Installation and maintenance must be performed by qualified personnel in accordance with local regulations and this manual.
- Ensure the electrical supply matches the specifications of the water heater (230V).
- Do not operate the water heater if it is damaged or malfunctioning.
- Do not block ventilation openings.
- 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.
- Before any maintenance or cleaning, disconnect the appliance from the main power supply.
- The water heater must be properly grounded.
- Do not tamper with safety devices.
Package Contents
Verify that all components are present and undamaged:
- Ariston Velis Tech Wifi 50 EU Electric Water Heater
- Instruction Manual (this document)
- Mounting bracket and fixings (check packaging)
- Safety valve (check packaging)
Setup and Installation
Proper installation is crucial for the safe and efficient operation of your water heater. It must be carried out by a qualified technician.
1. Choosing the Installation Location
- The water heater can be installed vertically or horizontally.
- Ensure the wall is strong enough to support the full weight of the water heater when filled with water (approx. 50 kg + 50 liters = 100 kg).
- Choose a location protected from frost and direct sunlight.
- Allow sufficient space around the unit for maintenance and access.

Image: Multi-position installation options (vertical and horizontal) for the Ariston Velis Tech Wifi water heater. The diagram illustrates the slim profile of the unit, which is approximately 27 cm deep.
2. Mounting the Water Heater
- Mark the drilling points on the wall according to the provided mounting template or dimensions.
- Drill holes and insert appropriate wall plugs.
- Secure the mounting bracket firmly to the wall.
- Carefully lift the water heater and hang it onto the mounting bracket. Ensure it is securely seated.

Image: Technical drawing with dimensions of the Ariston Velis Tech Wifi water heater. It shows the overall height (797mm), width (511mm), and depth (275mm), along with the positions of the cold water inlet (E) and hot water outlet (U), both G 1/2" connections. The diagram also indicates internal component layout and mounting points.
3. Plumbing Connections
- Connect the cold water inlet (marked 'E' or blue) to the main cold water supply using a G 1/2" connection.
- Install the supplied safety valve on the cold water inlet. This valve is mandatory and must not be obstructed.
- Connect the hot water outlet (marked 'U' or red) to the domestic hot water system using a G 1/2" connection.
- Open the hot water tap in your home to allow air to escape while the tank fills.
- Once water flows steadily from the hot water tap, close the tap. Check all connections for leaks.
4. Electrical Connection
- Ensure the main power supply is switched off before making any electrical connections.
- Connect the water heater to a dedicated 230V, 50Hz electrical circuit with appropriate overcurrent protection (e.g., a circuit breaker).
- Ensure proper grounding of the appliance.
- The electrical connection must comply with all local electrical codes.
Operating Instructions
1. Initial Power-On
- After plumbing and electrical connections are complete and checked, switch on the main power supply to the water heater.
- The display panel will illuminate.
2. Control Panel Overview (LCD Display)
The water heater features an LCD display for easy control and monitoring. Refer to the specific icons and buttons on your unit for detailed functions.
- Power Button: Turns the unit on/off.
- Temperature Adjustment: Buttons to increase or decrease the desired water temperature.
- ECO EVO Function: Activates the energy-saving mode, which learns your usage patterns.
- WiFi Indicator: Shows the status of the Wi-Fi connection.
3. Setting Water Temperature
- Press the temperature adjustment buttons to set your desired hot water temperature. The set temperature will be displayed on the LCD.
- The water heater will automatically heat the water to the set temperature and maintain it.
4. Wi-Fi Connection and Smart Control
The Ariston Velis Tech Wifi 50 EU can be controlled remotely via the Ariston NET app.
- Download the Ariston NET app from your smartphone's app store.
- Follow the in-app instructions to create an account and register your water heater.
- The app will guide you through connecting your water heater to your home Wi-Fi network. Ensure your Wi-Fi network is 2.4 GHz.
- Once connected, you can control temperature, schedule heating times, and monitor energy consumption from your smartphone.
Maintenance
Regular maintenance ensures the longevity and efficiency of your water heater. Always disconnect power before performing maintenance.
1. Descaling
- Over time, mineral deposits (limescale) can accumulate inside the tank and on the heating element, reducing efficiency.
- Descaling should be performed by a qualified technician, typically every 1-2 years, depending on water hardness.
2. Anode Rod Inspection/Replacement
- The anode rod protects the tank from corrosion. It depletes over time.
- Inspect the anode rod annually and replace it if significantly corroded. This task should be performed by a qualified technician.
3. Safety Valve Check
- Periodically check the safety valve by lifting its lever to ensure it operates freely and discharges water. This helps prevent mineral buildup.
- Follow the safety valve manufacturer's instructions for proper testing.
4. External Cleaning
- Clean the exterior of the water heater with a soft, damp cloth. Do not use abrasive cleaners or solvents.
Troubleshooting
This section provides solutions to common issues. For problems not listed here, contact qualified service personnel.
| Problem | Possible Cause | Solution |
|---|---|---|
| No hot water | No power supply; thermostat set too low; heating element failure. | Check circuit breaker; adjust thermostat; contact service technician. |
| Insufficient hot water | Thermostat set too low; excessive hot water usage; limescale buildup. | Increase temperature setting; reduce usage; descale (professional service). |
| Water too hot | Thermostat set too high. | Decrease temperature setting. |
| Water leaking | Loose plumbing connections; faulty safety valve; tank corrosion. | Tighten connections; replace safety valve; contact service technician for tank inspection. |
| Wi-Fi connection issues | Incorrect Wi-Fi password; router too far; 5GHz network used. | Verify password; move router closer or use extender; ensure 2.4GHz network. |
Technical Specifications
| Feature | Specification |
|---|---|
| Model | Velis Tech Wifi 50 EU (3100911) |
| Capacity | 50 Liters |
| Rated Power | 1500 W |
| Voltage | 230 V |
| Frequency | 50 Hz |
| Maximum Operating Pressure | 8 bar |
| Hot Water Delivery Rate | 77 l/min |
| Energy Class | B |
| Annual Energy Consumption | 1284 kWh |
| Dimensions (Width x Depth x Height) | 511 mm x 275 mm x 797 mm |
| Mounting | Vertical / Horizontal (Multi-position) |
| Special Features | Wi-Fi Connectivity, Low Water Flow Protection, High Water Pressure Protection |
| Display Type | LCD |
Warranty and Support
For warranty information, please refer to the warranty card included with your product or visit the official Ariston website. Keep your proof of purchase for warranty claims.
For technical support, service, or spare parts, please contact Ariston customer service or an authorized service center in your region. Contact details can typically be found on the Ariston website or in the product packaging.
Ariston Official Website: www.ariston.com





