1. Product Overview
The FVSTR 15L Dual Power Water Heater is designed to provide reliable and efficient hot water for various applications, including RVs, campers, caravans, and off-grid setups. Its dual power input (12V DC and 120V AC) ensures flexibility, allowing you to enjoy hot water whether you're connected to shore power or relying on batteries/solar. This unit features a robust, pressure-resistant design and multiple safety features for peace of mind.
2. Safety Information
Please read all safety warnings and instructions carefully before installation and operation to prevent injury or damage. Keep this manual for future reference.
- Ensure proper ventilation around the unit.
- Do not operate the water heater if it is damaged or malfunctioning.
- Always disconnect power before performing any maintenance or service.
- Install a pressure relief valve as per local codes and manufacturer instructions.
- This appliance must be grounded.
3. Installation and Setup
3.1 Mounting
The water heater is designed for wall-mounted installation. Choose a location that is structurally sound, protected from the elements, and allows for easy access to water and electrical connections. Ensure adequate clearance for maintenance and ventilation.
3.2 Water Connections
- Connect the cold water inlet (blue) to your water supply.
- Connect the hot water outlet (red) to your hot water distribution system.
- Install a pressure relief valve on the cold water inlet line as required by local plumbing codes.
- Ensure all connections are tight and leak-free.
3.3 Electrical Connections
The water heater supports both 12V DC and 120V AC power inputs. Refer to the wiring schematic below for correct electrical connections. It is recommended that electrical installation be performed by a qualified electrician.
- For 12V DC: Connect the +12V switched wire to the positive terminal, and GND to the negative terminal. Ensure the battery (BAT) is also connected to +12V. The 12V heating element draws 12 Amps.
- For 120V AC: Connect the Live (L), Neutral (N), and Ground (E) wires to the appropriate terminals. The 120V heating element draws 1.25 Amps.
- The system includes an AC switch and a thermal cut-off for safety.
- The thermostat controls both AC and DC heating elements.
4. Operating Instructions
4.1 Filling the Tank
Before turning on the power, ensure the water heater tank is completely filled with water. Open a hot water faucet in your system to allow air to escape until a steady stream of water flows out.
4.2 Power Selection
The water heater automatically prioritizes AC power when available. If 120V AC power is present, the unit will operate in AC mode (1500W) for faster heating. If AC power is not detected, it will switch to 12V DC mode (200W) for energy-efficient heating, ideal for battery or solar power sources.
4.3 Temperature Control
Use the included remote control to set your desired water temperature. The maximum temperature is 75°C (167°F). The unit will heat the water to the set temperature and maintain it.
4.4 Remote Control
The remote control allows you to adjust the temperature and monitor the water heater's status. Refer to the remote control's specific instructions for detailed usage.
5. Maintenance
Regular maintenance ensures optimal performance and longevity of your water heater.
- Draining the Tank: If the unit will be unused for an extended period or in freezing conditions, drain the tank completely to prevent damage. Disconnect power, close the cold water inlet valve, open a hot water faucet, and open the drain valve on the water heater.
- Pressure Relief Valve: Periodically check the pressure relief valve to ensure it is not blocked and is functioning correctly.
- Cleaning: Clean the exterior of the unit with a soft, damp cloth. Do not use abrasive cleaners.
- Anti-frozen Protection: The unit features anti-frozen protection. However, in extremely cold environments, draining the tank is still recommended for maximum protection.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No hot water | No power, thermal cut-off activated, heating element failure, low water flow. | Check power connections, reset thermal cut-off, ensure adequate water flow, contact support if heating element is faulty. |
| Water not hot enough | Temperature setting too low, insufficient heating time (DC mode), excessive hot water demand. | Increase temperature setting, allow more time for heating, reduce hot water usage. |
| Water leaking | Loose connections, faulty pressure relief valve, tank damage. | Tighten connections, inspect/replace pressure relief valve, contact support for tank damage. |
| Unit not switching modes (AC/DC) | AC power detection issue, faulty relay. | Verify AC power supply, contact support for relay issues. |
7. Specifications
| Feature | Detail |
|---|---|
| Product Type | Electric Water Heater |
| Capacity | 15 Liters |
| Power Input | DC 12V (200W) / AC 120V (1500W) |
| Voltage | 12 Volts (DC) / 120 Volts (AC) |
| Heating Power | 1500 Watts (AC), 200 Watts (DC) |
| Maximum Flow Rate | 8 Liters Per Minute |
| Max Temperature | 75°C (167°F) |
| Operating Pressure | Up to 6 Bar |
| Mounting Type | Wall-Mounted |
| Dimensions (Unit) | Approx. 17.7 inches (Length) x 12 inches (Diameter/Height) |
| Weight | Approx. 7.7 lbs (3.5 kg) |
| Efficiency | High Efficiency |
| Color | Black |
| Included Components | Water Heater Unit, Pressure Relief Valve, Wire Controller (Remote) |
| Manufacture Year | 2023 |
| Spare Parts Availability | 10 Years (EU Standard) |
8. User Tips
- For faster heating, always use the 120V AC power mode when available. The 12V DC mode is designed for energy conservation in off-grid scenarios.
- When using in an RV or camper, consider the power draw of the 12V DC heating element (200W / 12 Amps) to ensure your battery bank can support it without excessive discharge.
- Regularly check the remote control's battery (if applicable) to ensure consistent operation.
- If installing in a vehicle, ensure the mounting is secure enough to withstand vibrations during travel.
9. Warranty and Support
This FVSTR water heater comes with a 1-year manufacturer warranty covering defects in materials, workmanship, and functional failures under normal use. For any questions regarding installation, operation, or troubleshooting, our 24/7 customer service team is available via online chat and email. We also guarantee 10-year spare parts availability (EU Standard) to ensure long-term support and serviceability.