1. Important Safety Information
Please read this manual carefully before installation, operation, or maintenance of the Sannover Volt 7.5 kW Electric Boiler. Failure to follow these instructions could result in property damage, personal injury, or death.
- Professional Installation Required: For the 2-year manufacturer's warranty to be valid, the electric boiler must be installed by a qualified professional.
- Professional Diagnosis and Maintenance: In case of a malfunction, a diagnosis by a qualified professional is required. All maintenance and repairs must also be performed by a qualified professional. Failure to meet these conditions will void the warranty.
- Inspect Upon Delivery: It is essential to check the condition of the package upon delivery, both inside and out. Without claims made at the time of delivery, no product exchange or refund is possible.
- Electrical Safety: Ensure the power supply matches the boiler's requirements (230 V Single-phase / 400 V Three-phase).
- Water Connections: Ensure all water connections are secure and leak-free.
- Frost Protection: The boiler is certified frost-resistant, but proper installation in a protected environment is still recommended.
2. Product Overview
The Sannover Volt 7.5 kW Electric Boiler is a complete heating unit designed for central heating radiator systems or underfloor heating. It is compact, quiet, and features electronic modulation.
Key Features:
- LCD Touch Screen
- Integrated Circulation Pump
- 6-liter Expansion Tank
- Manometer (Pressure Gauge)
- Electronic Power Regulator
- Automatic Anti-freeze Function
- Adjustable Temperature Range: 30-80°C
- Frost-resistant certified
- Intelligent control, self-diagnosis, and fault indication
- Stainless steel heat exchanger and heating elements
- Thermal switch for emergency power cut-off
Figure 1: Front view of the Sannover Volt Electric Boiler, showing the integrated LCD touch screen.
Figure 2: Side view of the Sannover Volt Electric Boiler, illustrating its compact design.
3. Setup and Installation
Note: Installation must be performed by a qualified professional.
3.1 Unpacking and Inspection
- Carefully remove the boiler from its packaging.
- Inspect the unit for any signs of damage incurred during shipping. Report any damage immediately to the carrier and supplier.
- Verify that all components listed in the packing list are present.
3.2 Mounting the Boiler
Mount the boiler securely on a vertical wall, ensuring adequate clearance for ventilation and maintenance. Refer to the included mounting template (if provided) for precise hole placement.
3.3 Water Connections
The boiler features G 3/4" water connections. Connect the boiler to your central heating system. This boiler is for heating only and does not directly produce domestic hot water. It can produce domestic hot water only in combination with an external domestic hot water tank (ECS balloon) with a coil.
Figure 3: Detailed view of the boiler's connection points, including the pressure gauge and water inlets/outlets.
3.4 Electrical Connections
The Sannover Volt 7.5 kW boiler supports both 230 V Single-phase and 400 V Three-phase power supplies. Ensure the correct wiring configuration is used for your specific electrical system. All electrical work must comply with local regulations and be performed by a certified electrician.
3.5 Filling the System
After all connections are made, fill the central heating system with water and bleed any air from the system. Monitor the manometer to ensure the system pressure is within the recommended operating range (Maximum pressure 0.15 MPa).
4. Operating Instructions
The Sannover Volt boiler is equipped with an intuitive LCD touch screen for easy operation.
4.1 Powering On/Off
Press the power button on the LCD screen to turn the boiler on or off.
4.2 Setting the Temperature
Use the up/down arrows on the touch screen to adjust the desired heating temperature. The temperature range is 30°C to 80°C.
Figure 4: The LCD touch screen interface, showing temperature display and control options.
4.3 Understanding Display Icons
The LCD screen displays various icons indicating operational status, settings, and potential errors. Refer to the detailed icon guide in the full manual for specific meanings.
4.4 Automatic Anti-freeze Function
The boiler features an automatic anti-freeze function. When activated, the boiler will automatically engage to prevent freezing if the ambient temperature drops below a certain threshold.
5. Maintenance
Note: All maintenance and repairs must be performed by a qualified professional.
5.1 Regular Checks
- System Pressure: Regularly check the system pressure on the manometer. It should be within the recommended operating range.
- Visual Inspection: Periodically inspect the boiler and connections for any signs of leaks, corrosion, or damage.
5.2 Professional Servicing
It is recommended to have the boiler professionally serviced annually to ensure optimal performance and longevity. This includes checking the heating elements, circulation pump, expansion tank, and safety features.
6. Troubleshooting
The boiler features self-diagnosis and fault indication capabilities. If an error occurs, an error code or symbol may appear on the LCD screen.
6.1 Common Issues and Solutions (Consult a Professional)
- No Heat:
- Check power supply.
- Verify system pressure.
- Check thermostat settings.
- Consult a professional if the issue persists or an error code is displayed.
- Low System Pressure:
- Check for leaks in the system.
- Repressurize the system as per professional guidance.
- Error Codes:
If an error code appears on the LCD screen, note the code and contact a qualified professional for diagnosis and repair. Do not attempt to repair the boiler yourself.
6.2 Thermal Switch Activation
The boiler is equipped with a thermal switch for emergency power cut-off. If this switch activates, it indicates an overheating condition or other critical fault. Immediately turn off the power supply to the boiler and contact a qualified professional.
7. Specifications
| Feature | Specification |
|---|---|
| Model | Volt7500MT |
| Power Output | 7.5 kW |
| Power Supply | 230 V Single-phase / 400 V Three-phase |
| Maximum Heating Temperature | 80 °C |
| Maximum Pressure | 0.15 MPa |
| Water Connection | G 3/4" |
| Expansion Tank Capacity | 6 liters |
| Dimensions (H x W x D) | 600 x 398 x 214 mm |
| Weight | 20 kg |
| Color | White |
| Manufacturer | Sannover |
8. Warranty and Support
8.1 Manufacturer's Warranty
The Sannover Volt Electric Boiler comes with a 2-year manufacturer's warranty. This warranty is contingent upon the boiler being installed, diagnosed, and maintained by a qualified professional. Failure to adhere to these conditions will void the warranty.
8.2 Contacting Support
For technical support, warranty claims, or to locate a qualified service professional, please contact Sannover customer service or your authorized dealer. Keep your purchase receipt and model number (Volt7500MT) readily available when contacting support.
