1. Introdución
This manual provides essential information for the safe and efficient operation, installation, and maintenance of your Ranein Electric Mini Tank Water Heater, Model WarmCube 8. Please read this manual thoroughly before installation and use, and retain it for future reference.
The Ranein WarmCube 8 is an 8-gallon point-of-use electric water heater designed to provide instant hot water for various applications, including kitchens, bathrooms, and RVs. It operates on 120V with a 1440W heating element.

Figure 1: Ranein WarmCube 8 Electric Mini Tank Water Heater. This image shows the compact, white unit with a central control knob and the Ranein logo.
2. Información de seguridade
ADVERTENCIA: O incumprimento destas instrucións de seguridade podería provocar danos materiais, lesións graves ou a morte.
- Ensure the unit is installed by a qualified professional in accordance with all local plumbing and electrical codes.
- Non poñas en funcionamento o quentador de auga se está danado ou non funciona correctamente.
- Desconecte sempre a alimentación antes de realizar calquera mantemento ou servizo.
- The unit is equipped with dry-burn protection and an advanced leakage prevention system (auto-cutoff in <0.1s) for enhanced safety. However, regular inspection is recommended.
- The maximum operating temperature is 185°F (85°C). Exercise caution to prevent scalding.
- The unit has an IPX4 waterproof rating, indicating resistance to splashing water, but it should not be submerged.
- Asegúrese de conectar a terra adecuada para evitar descargas eléctricas.
- Non bloquee a válvula de alivio de presión.

Figure 2: Multiple Protection Features. This diagram highlights the water heater's safety features, including high temperature resistance, corrosion resistance, high pressure resistance, dry burning resistance, IPX4 waterproof rating, and leakage resistance.
3. Produto rematadoview
The Ranein WarmCube 8 is designed for efficiency and durability, featuring:
- Auga quente instantánea: 8-gallon capacity provides hot water on demand, ideal for point-of-use applications.
- Construción duradeira: Equipped with a stainless steel inner tank for corrosion resistance and extended lifespan.
- Calefacción eficiente: 1440W heating element ensures rapid water heating.
- Illamento avanzado: Triple-layer design with enamel coating, high-density insulation foam, and reinforced decarburized steel plate for superior heat preservation and reduced energy loss.
- Termostato axustable: Precision control for desired water temperature up to 185°F (85°C).
- Características de seguridade: Includes high-temperature resistance, high-pressure resistance (up to 1.0 MPa), dry-burn protection, IPX4 waterproof rating, and an advanced leakage prevention system.

Figure 3: Key Features Summary. This graphic illustrates the water heater's 24-hour timer function, 1440W high power, multiple protection systems, 55-145°F temperature range, easy installation options, 3D foam insulation, and energy-saving design.

Figure 4: 3-Layer Inner Liner. This image shows a cross-section of the tank, detailing the enamel layer, density layer, and decarburized steel plate layer, which contribute to its durability and heat preservation.
4. Configuración e instalación
The Ranein WarmCube 8 offers versatile installation options, including under-sink, wall-mounted, or floor-mounted setups. Ensure adequate clearance and proper plumbing and electrical connections.
4.1 Selección do sitio
- Choose a location that is easily accessible for maintenance and protected from freezing temperatures.
- Ensure the mounting surface (if wall-mounted) can support the weight of the unit when full (approximately 8 gallons of water + unit weight).
- Verify sufficient space for installation and future servicing.

Figure 5: Under-Sink Space Confirmation. This image illustrates the minimum clearance required for under-sink installation: minimum 5 inches above the unit, and minimum 2 inches on the sides.
4.2 Conexións de fontanería
- Conecte a entrada de auga fría ao porto designado do quentador de auga.
- Connect the hot water outlet to your fixture's hot water line.
- Install a temperature and pressure relief (T&P) valve as required by local codes.
- Flush the tank with water before connecting to power to remove any air and ensure no leaks.
4.3 Conexións eléctricas
- The unit operates on a standard 120V outlet. Ensure the circuit can handle the 1440W load.
- Plug the water heater into a properly grounded electrical outlet.

Figure 6: Multiple Installation Options. This image displays the water heater installed under a sink and mounted on a wall, demonstrating its flexibility for various spaces.
5. Instrucións de funcionamento
Once installed and filled with water, the Ranein WarmCube 8 is ready for operation.
5.1 Inicio inicial
- Ensure the tank is completely filled with water before plugging in the unit. Open a hot water faucet to allow air to escape until water flows steadily.
- Plug the unit into a grounded 120V outlet. The heating indicator light will illuminate.
5.2 Axuste de temperatura
The water heater features a precision adjustable thermostat. Use the control knob on the front of the unit to set your desired water temperature.
- Xire o botón no sentido horario para aumentar a temperatura.
- Turn the knob counter-clockwise to decrease the temperature or turn the unit off.
- The temperature range is typically 55°F to 145°F (13°C to 63°C), with a maximum internal temperature capability of 185°F (85°C).

Figure 7: Temperature Knob Adjustment. This image shows the control knob and suggests optimal temperatures for different uses: 107°F for washing dishes, 104°F for washing vegetables, 98°F for brushing teeth, and 89°F for washing face.
5.3 Uso diario
The unit will automatically heat water to the set temperature and maintain it. Hot water will be available instantly at your point of use.
6. Mantemento
Un mantemento regular garante un rendemento óptimo e prolonga a vida útil do teu quentador de auga.
- Lavado anual: Drain and flush the tank annually to remove sediment buildup. Disconnect power before draining.
- Comprobación da válvula T&P: Test the temperature and pressure relief valve at least once a year by lifting the lever. Ensure water flows freely and the valve reseats properly.
- Limpeza exterior: Limpar o exterior con anuncioamp pano. Non use produtos de limpeza abrasivos.
- Inspección: Periodically inspect for any signs of leaks, corrosion, or damage to the power cord.
7 Solución de problemas
Consulta a seguinte táboa para ver os problemas comúns e as súas solucións.
| Problema | Causa posible | Solución |
|---|---|---|
| Sen auga quente | No power; thermostat set too low; tripped breaker; heating element failure. | Check power connection and breaker; adjust thermostat; contact qualified technician for element replacement. |
| Auga non quente suficiente | Thermostat set too low; excessive hot water demand; sediment buildup. | Increase thermostat setting; allow time for recovery; flush tank to remove sediment. |
| Fuga de auga | Loose connections; faulty T&P valve; tank rupture. | Tighten connections; replace T&P valve; contact qualified technician for tank issues. |
| Funcionamento ruidoso | Acumulación de sedimentos no tanque. | Flush tank to remove sediment. |
Se o problema persiste despois de intentar estas solucións, póñase en contacto co servizo de atención ao cliente.
8. Especificacións
| Característica | Detalle |
|---|---|
| Marca | Ranein |
| Número de modelo | RC80G-W |
| Estilo | WarmCube 8 |
| Capacidade | 8 litros |
| Voltage | 120 V |
| Poder | 1440 W |
| Temperatura máxima | 185 °F (85 °C) |
| Dimensións do produto (L x A) | 17.32" x 17.32" |
| Peso do elemento | 28.2 libras |
| Tipo de montaxe | Wall, Floor, Under-sink |
| Clasificación impermeable | IPX4 |
| Material do tanque interior | Aceiro inoxidable |
| Compoñentes incluídos | Quentador de auga |

Figure 8: Product Parameters. This image provides a visual representation of the water heater's dimensions and a table summarizing key specifications including capacity, voltage, power, max water pressure, weight, amperage, and waterproof grade.
9. Garantía e soporte
For warranty information and customer support, please refer to the documentation included with your product or visit the official Ranein websitio. Garde o recibo da compra como xustificante de compra para reclamacións de garantía.
For technical assistance or service inquiries, please contact Ranein customer service.





