1. Introducció
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. Informació de seguretat
AVÍS: Si no es segueixen aquestes instruccions de seguretat, es poden produir danys materials, lesions greus o la mort.
- Ensure the unit is installed by a qualified professional in accordance with all local plumbing and electrical codes.
- No feu funcionar l'escalfador d'aigua si està danyat o no funciona correctament.
- Desconnecteu sempre l'alimentació abans de realitzar qualsevol manteniment o servei.
- 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.
- Assegureu-vos de posar a terra correctament per evitar descàrregues elèctriques.
- No bloquegeu la vàlvula d'alleujament de pressió.

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. Producte acabatview
The Ranein WarmCube 8 is designed for efficiency and durability, featuring:
- Aigua calenta instantània: 8-gallon capacity provides hot water on demand, ideal for point-of-use applications.
- Construcció duradora: Equipped with a stainless steel inner tank for corrosion resistance and extended lifespan.
- Calefacció eficient: 1440W heating element ensures rapid water heating.
- Aïllament avançat: Triple-layer design with enamel coating, high-density insulation foam, and reinforced decarburized steel plate for superior heat preservation and reduced energy loss.
- Termostat ajustable: Precision control for desired water temperature up to 185°F (85°C).
- Característiques de seguretat: 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. Configuració i instal·lació
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 Selecció del lloc
- 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 Connexions de fontaneria
- Connecteu l'entrada d'aigua freda al port designat de l'escalfador d'aigua.
- 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 Connexions elèctriques
- 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. Instruccions de funcionament
Once installed and filled with water, the Ranein WarmCube 8 is ready for operation.
5.1 Inici 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 Ajust 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.
- Gireu el botó en sentit horari per augmentar la 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 Ús diari
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. Manteniment
Un manteniment regular garanteix un rendiment òptim i allarga la vida útil del vostre escalfador d'aigua.
- Annual Flushing: Drain and flush the tank annually to remove sediment buildup. Disconnect power before draining.
- T&P Valve Check: 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.
- Neteja exterior: Netegeu l'exterior amb anunciamp tela. No utilitzeu netejadors abrasius.
- Inspecció: Periodically inspect for any signs of leaks, corrosion, or damage to the power cord.
7. Solució De Problemes
Consulteu la taula següent per veure els problemes habituals i les seves solucions.
| Problema | Causa possible | Solució |
|---|---|---|
| Sense aigua calenta | No power; thermostat set too low; tripped breaker; heating element failure. | Check power connection and breaker; adjust thermostat; contact qualified technician for element replacement. |
| L'aigua no és prou calenta | Thermostat set too low; excessive hot water demand; sediment buildup. | Increase thermostat setting; allow time for recovery; flush tank to remove sediment. |
| Fuites d'aigua | Loose connections; faulty T&P valve; tank rupture. | Tighten connections; replace T&P valve; contact qualified technician for tank issues. |
| Funcionament sorollós | Acumulació de sediments al dipòsit. | Flush tank to remove sediment. |
Si el problema persisteix després d'intentar aquestes solucions, poseu-vos en contacte amb l'atenció al client.
8. Especificacions
| Característica | Detall |
|---|---|
| Marca | Ranein |
| Número de model | RC80G-W |
| Estil | WarmCube 8 |
| Capacitat | 8 galons |
| Voltage | 120 V |
| Poder | 1440W |
| Temperatura màxima | 185 °C (85 °F) |
| Dimensions del producte (amplada x alçada) | 17.32 cm x 17.32 cm |
| Pes de l'article | 28.2 lliures |
| Tipus de muntatge | Wall, Floor, Under-sink |
| Classificació impermeable | IPX4 |
| Material del dipòsit interior | Acer inoxidable |
| Components inclosos | Escalfador d'aigua |

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, potència, pressió màxima de l'aigua, pes, amperage i grau impermeable.
9. Garantia i Suport
For warranty information and customer support, please refer to the documentation included with your product or visit the official Ranein weblloc web. Conserveu el rebut de compra com a comprovant de compra per a reclamacions de garantia.
For technical assistance or service inquiries, please contact Ranein customer service.





