Electric water heater EL. 5 EM NADUM. (OS) BEST

Product detailed description

This electric storage water heater is designed for use in domestic and light commercial hot water systems where a compact, manually controlled unit is required. It is commonly installed in kitchens, bathrooms, or utility rooms where point-of-use heating is needed. The unit is suitable for integration into standard plumbing systems and can be used in conjunction with cold water supply lines to provide on-demand hot water. The 5L and 10L variants are ideal for applications requiring limited storage capacity, such as small sinks, single taps, or compact appliances.

Installers working on new builds or retrofit projects will find this unit suitable for applications where space is restricted and a dedicated hot water supply is needed without the use of a central boiler. The unit is not intended for high-flow or continuous use applications and is best suited for intermittent demand scenarios.

Technical parameters

Installation and connection

Installation requires a standard electrical supply of 230 V and a dedicated circuit with a current draw of up to 6.8 A. The unit should be mounted on a stable, non-combustible surface, with sufficient clearance for ventilation. The inlet and outlet connections are typically 1/2 inch threaded ports, and the installer must ensure that the plumbing system is compatible with the unit’s maximum working pressure of 0.6 MPa. A pressure relief valve should be installed in the system to prevent over-pressurisation. Common installation mistakes include incorrect electrical wiring and failure to secure the unit properly, which can lead to instability or overheating.

Compatibility and accessories

This unit is compatible with standard domestic plumbing systems and can be connected to cold water supply lines. It is intended for use with standard taps and fixtures that require a manually controlled hot water source. No additional accessories are required for basic operation, but a pressure relief valve is recommended for system safety. No related products are listed for this model.

Technical background for designers

The unit operates by heating water stored in an insulated tank using a 1.5 kW electric heating element. The tank is insulated with expanded polystyrene and enclosed in a rigid plastic housing to reduce heat loss. The ceramic enamel lining and magnesium anode provide dual protection against internal corrosion. The unit is designed for integration into low-demand hot water systems and is not intended for use with recirculation loops or high-flow applications. The service life and efficiency are influenced by the quality of the water supply, the frequency of use, and the effectiveness of the insulation.

Service and operation

Regular visual inspections are recommended to check for signs of corrosion, leaks, or electrical faults. The unit does not require scheduled maintenance beyond these checks. The magnesium anode should be inspected periodically to ensure it is not fully consumed, as this can lead to internal corrosion. The heating element should be checked for scale buildup, which can reduce efficiency and increase energy consumption. No specific service intervals are provided in the technical data.

Frequently asked questions

Can the EL. 5 EM NADUM. (OS) BEST be connected to a cold water supply line?
Yes, the unit is designed for connection to a cold water supply line and will heat the water as it is drawn through the tank. A pressure relief valve should be installed to ensure safe operation.

Is the unit suitable for continuous use?
No, the unit is designed for intermittent use and is not intended for continuous operation. Prolonged use may lead to overheating and reduced efficiency.

Can the unit be installed in a vertical position?
Yes, the unit can be mounted vertically, provided it is securely fastened to a stable surface and there is adequate clearance for ventilation.

What is the maximum water temperature it can reach?
The maximum water temperature is not specified in the technical data, but the unit is designed for standard domestic hot water applications. The temperature can be adjusted manually via the control panel.