1. Einleitung
This manual provides essential information for the safe and efficient installation, operation, and maintenance of your ELDOM Favourite WH05039L horizontal storage water heater. Please read these instructions carefully before installation and use, and retain them for future reference. This water heater is designed for horizontal installation, making it suitable for spaces where a vertical boiler may not fit.
Key features include thick, dense CFC-free insulation for minimal energy loss, a high-temperature resistant boiler lining, antifreeze protection, and dual magnesium anode systems to protect against rust. The unit is CE certified, ensuring compliance with European safety standards, and includes a 3-in-1 metallic combined safety valve.

Figure 1: ELDOM Favourite WH05039L Horizontal Storage Water Heater, front view.
2. Sicherheitshinweise
WARNUNG: Failure to follow these safety instructions could result in electric shock, fire, property damage, or personal injury.
- Installation und Wartung müssen von qualifiziertem Personal gemäß den örtlichen Vorschriften und diesem Handbuch durchgeführt werden.
- Ensure the electrical supply matches the specifications of the water heater (230V, 2kW).
- Vor jeglichen Wartungs- oder Servicearbeiten muss die Stromzufuhr unterbrochen werden.
- Betreiben Sie den Warmwasserbereiter nicht, wenn er beschädigt ist oder eine Fehlfunktion aufweist.
- Der Warmwasserbereiter muss ordnungsgemäß geerdet sein.
- Do not block the safety valve. Regular inspection of the safety valve is recommended.
- Halten Sie brennbare Materialien vom Warmwasserbereiter fern.
- Dieses Gerät ist nicht für den Gebrauch durch Personen (einschließlich Kinder) mit eingeschränkten physischen, sensorischen oder geistigen Fähigkeiten oder Mangel an Erfahrung und Wissen bestimmt, es sei denn, sie werden von einer für ihre Sicherheit verantwortlichen Person beaufsichtigt oder erhalten Anweisungen zur Verwendung des Geräts.
- Kinder sollten beaufsichtigt werden, um sicherzustellen, dass sie nicht mit dem Gerät spielen.
3. Einrichtung und Installation
The ELDOM WH05039L is designed for horizontal wall mounting. Ensure the mounting surface is structurally sound and capable of supporting the water heater's weight when full (approx. 19 kg empty + 50 kg water = 69 kg).
3.1 Montage
Mount the water heater horizontally using appropriate wall anchors and brackets (not always included, check packaging). Refer to the dimension diagram for precise measurements and mounting points.

Figure 2: Technical diagrams showing dimensions, internal components, and connection points. Note the left-side connections.
The diagram illustrates the external dimensions (A, B, C, D, E, F, G, M) and internal structure. Pay attention to the mounting points (labeled 4 in the top-left diagram) and the position of the heating element (5 in the bottom-left diagram).
3.2 Sanitäranschlüsse
The water heater features connections on the linke Seite. Ensure proper plumbing for hot and cold water lines.
- Hot water outlet (1): Connect to the hot water supply system.
- Cold water inlet - Drain (2): Connect to the cold water supply. This connection also serves as the drain point.
- Sicherheitsventil: Install the included 3-in-1 metallic combined safety valve on the cold water inlet. This valve is crucial for pressure relief and preventing backflow. Ensure the discharge pipe from the safety valve is routed to an open drain.
All connections are G1/2M. Use appropriate sealing materials to prevent leaks.
3.3 Elektrischer Anschluss
Connect the water heater to a dedicated electrical circuit. The unit requires 230 Volts (AC) and has a power rating of 2 kW (10 Amperes). Ensure the circuit is protected by a suitable circuit breaker and that proper grounding is established.
- The electrical connection point is typically located under the control panel cover (4 in the top-right diagram).
- Ensure all wiring is secure and insulated.
- The on/off switch is illuminated and waterproof.
4. Bedienung
Once installed and filled with water, the ELDOM WH05039L is ready for operation.
4.1 Füllen des Warmwasserbereiters
- Before switching on the power, ensure the water heater is completely filled with water.
- Open a hot water tap in your home to allow air to escape from the tank.
- Open the cold water inlet valve to fill the tank.
- Once water flows steadily from the hot water tap, the tank is full. Close the hot water tap.
4.2 Einschalten und Temperatureinstellung
- Switch on the main power supply to the water heater using the illuminated on/off switch.
- Adjust the desired water temperature using the external mechanical thermostat. The temperature indicator (3 in the top-right diagram) will show the current water temperature.
- The recommended thermostat setting for optimal energy efficiency and safety is typically around 60°C.
4.3 Antifreeze Protection
The water heater is equipped with antifreeze protection. In cold environments, this feature helps prevent water inside the tank from freezing, protecting the unit from damage. However, for prolonged periods of non-use in freezing conditions, it is advisable to drain the water heater completely.
5. Wartung
Regular maintenance ensures the longevity and efficient operation of your ELDOM water heater.
5.1 Magnesium Anode Inspection and Replacement
The water heater features two magnesium anode systems to protect the tank from corrosion and rust. These anodes are sacrificial and deplete over time. It is recommended to have them inspected annually by a qualified technician and replaced as necessary, typically every 1-3 years depending on water quality.
5.2 Entleeren des Warmwasserbereiters
Draining may be required for maintenance, prolonged periods of non-use, or to prevent freezing. To drain:
- Schalten Sie die Stromzufuhr zum Warmwasserbereiter ab.
- Schließen Sie das Kaltwasserzulaufventil.
- Öffnen Sie einen Warmwasserhahn in Ihrem Haus, um den Druck abzubauen und Luft in den Tank zu lassen.
- Connect a hose to the cold water inlet/drain connection (2) and route it to a suitable drain.
- Open the drain valve (if separate, or use the cold water inlet connection) to allow water to flow out.
- Once drained, close the drain valve and hot water tap.
5.3 Safety Valve Check
Periodically check the safety valve by lifting the lever to ensure it operates freely and discharges water. This helps prevent mineral buildup. If the valve does not discharge water or leaks continuously, it may need replacement.
5.4 Reinigung
Reinigen Sie die Außenseite des Warmwasserbereiters mit einem weichen, fusselfreien Tuch.amp Tuch. Keine Scheuer- oder Lösungsmittel verwenden.
6. Fehlerbehebung
This section provides solutions to common issues. For problems not listed here, or if you are unsure, contact qualified service personnel.
| Problem | Mögliche Ursache | Lösung |
|---|---|---|
| Kein heißes Wasser | No power, thermostat set too low, heating element failure. | Check power supply and circuit breaker. Adjust thermostat. If element failure is suspected, contact service. |
| Wasser nicht heiß genug | Thermostat zu niedrig eingestellt, übermäßiger Warmwasserverbrauch, Ablagerungen. | Increase thermostat setting. Allow recovery time between uses. Consider draining and flushing the tank. |
| Wasserlecks | Loose connections, faulty safety valve, tank corrosion. | Tighten connections. Inspect and replace safety valve if necessary. Tank corrosion usually requires replacement. |
| Ungewöhnliche Geräusche (z. B. Knallen, Rumpeln) | Ablagerungen im Tank. | Den Tank entleeren und durchspülen, um Ablagerungen zu entfernen. |
7. Spezifikationen
| Besonderheit | Detail |
|---|---|
| Marke | ELDOM |
| Modell | WH05039L |
| Typ | Horizontal Storage Water Heater |
| Kapazität | 50 Liter |
| Leistung | 2 kW |
| Bandtage | 230 Volt (Wechselstrom) |
| Aktuell | 10 Amperes |
| Energieaufnahme | 1418 kWh/Jahr |
| Energieeffizienzklasse | C |
| Abmessungen (L x T) | 760 x 410 mm (approx. 41 x 76 x 41 cm) |
| Gewicht (leer) | 19 kg |
| Maximaler Betriebsdruck | 0.7 MPa (7 Bar) - Note: Product data listed 800 Bar, which is likely a typo. 0.7 MPa is standard. |
| Anschlüsse | Left side, G1/2M |
| Besondere Merkmale | Rust-proof (dual magnesium anodes), Antifreeze protection, 3-in-1 safety valve |
| Material | Legierter Stahl |
| Mischwasser bei 40°C | 70 Liter |
| Acoustic Power Level | 15 dB |

Figure 3: Energy efficiency label for ELDOM WH05039L, showing Class C rating and annual energy consumption.
8. Garantie und Support
For warranty information, technical support, or service inquiries, please contact ELDOM directly using the details below. Always provide your model number (WH05039L) when contacting support.
- EPREL Produktinformationen: https://eprel.ec.europa.eu/qr/31202
- Hersteller WebWebsite: https://eldominvest.com/
- E-Mail-Support: tech@eldominvest.com
- Telefonischer Support: +359 52 571 914
- Adresse: бул. "Владислав Варненчик" 275А, 9009 Варна / Varna, Bulgaria
Bitte bewahren Sie Ihren Kaufbeleg für Garantieansprüche auf.





