ELÍZ EHT 5.5

Product detailed description

The ELIZ EHT 5.5 is a compact electric flow heater intended for single-point hot water supply in domestic or light commercial settings. It is commonly used in kitchens and bathrooms where immediate access to hot water is required. The device operates on a pressure-driven principle, ensuring activation only when water flows through the unit. Its small size and flexible installation options make it ideal for retrofitting into existing plumbing layouts without major modifications.

This model is particularly suited for applications where space is limited, such as under-sink installations or above-sink mounting on basins. It is compatible with both pressure and non-pressure taps, allowing for versatile integration into various plumbing configurations. The heater’s hydraulic switching mechanism ensures energy is consumed only during active water flow, enhancing overall efficiency.

Technical parameters

Installation and connection

The ELIZ EHT 5.5 can be mounted either under or above a sink, depending on the available space and plumbing configuration. When installed under a sink, it connects directly to a standard sink tap. For overhead installation, it fits onto any basin tap with a 30 mm outlet spacing. The heater includes a built-in flow control insert to regulate water flow and maintain optimal performance, especially when cold water inlet temperatures are low.

The water inlet is sized at 3/8 inch (G3/8") male thread, and the device is supplied with a 0.8 m power cable without a plug. Before installation, ensure the electrical supply meets the 230 V requirement and that the circuit is protected by a suitable fuse or circuit breaker. Verify that the water supply pressure is within the specified range (0.1–1.0 MPa) to prevent damage to the internal components. A common mistake during installation is incorrect orientation of the heater, which can affect flow dynamics and thermal efficiency. Always follow the manufacturer’s instructions for secure mounting and sealing of all connections.

Compatibility and accessories

The EHT 5.5 is compatible with a wide range of pressure and non-pressure taps, provided the outlet spacing is 30 mm. It is also suitable for use with hose connections in overhead installations. The heater is supplied with a flow-regulating insert to reduce water usage while maintaining comfortable water temperatures. Additional components such as mounting brackets or sealing gaskets may be required depending on the installation method and surface type.

Technical background for designers

The EHT 5.5 operates using a direct resistance heating element, which heats water as it passes through the unit. The hydraulic switching mechanism activates the heating element only when water is flowing, ensuring energy is used efficiently. The housing is constructed from durable materials designed to withstand standard domestic water pressures and temperatures. The IP 25 rating provides protection against solid objects and splashing water, though it is not suitable for immersion or high-pressure environments.

The thermal cut-out prevents overheating by automatically disconnecting the power if the internal temperature exceeds safe limits. This feature enhances safety and prolongs the heater’s service life. The compact size and low profile allow it to fit seamlessly into tight spaces, making it ideal for modern kitchens and bathrooms with limited storage capacity.

Service and operation

Regular visual inspections are recommended to check for signs of wear, corrosion, or leaks around the connections. The thermal cut-out should be tested periodically to ensure it functions correctly. If the heater fails to operate, first verify the water supply and electrical connections. If the issue persists, disconnect the power and consult the manufacturer’s technical documentation for troubleshooting steps. No routine maintenance is required beyond these checks, and the device does not require scheduled service intervals.

Frequently asked questions

Can the ELIZ EHT 5.5 be installed above a sink?
Yes, it can be mounted above a sink if the basin tap has a 30 mm outlet spacing. Ensure the installation is secure and the water supply pressure is within the specified range.

Is the EHT 5.5 suitable for use with a non-pressure tap?
Yes, the heater is compatible with both pressure and non-pressure taps, provided the flow rate meets the minimum activation threshold of 2.2 l/min.

What is the purpose of the flow-regulating insert included with the heater?
The insert helps reduce water usage while maintaining a comfortable temperature, especially when cold water inlet temperatures are low. It contributes to energy efficiency and user comfort.

Can the EHT 5.5 be used in a multi-tap system?
No, the heater is designed for single-point use only. It is not suitable for supplying multiple taps simultaneously due to its fixed power and flow characteristics.

Documents for download

• Application PDF