ELIZ EL 51 Water Flow Heater

Product detailed description

The ELIZ EL 51 is a compact electric flow heater intended for point-of-use installation in single-point applications such as bathroom basins or kitchen sinks. It operates without pressure and is suited for environments where central hot water distribution is not available. Installers typically encounter these units in domestic properties, cottages, or small facilities such as guest houses and workshops. The device ensures immediate hot water without the need for storage tanks. It is commonly integrated into systems where space is limited and rapid hot water delivery is required.

Its design allows for simple mounting above the sink or basin, with all necessary components included for direct installation. The heater requires a minimum water flow and pressure to activate, ensuring safe and efficient operation. It is particularly suitable for locations where traditional water heating methods are impractical due to space constraints or energy efficiency requirements.

Technical parameters

type	EL 51
power	1500 / 3500 / 5000 W
voltage	230 V
current	25 A
electrical protection	IP 24
power switching	yes
water connection	1/2 inch
minimum switching pressure	2 bar
safety fuse	yes
weight	1.58 kg
product dimensions	W / H / D: 145 x 232 x 84 mm
warranty	2 years
EAN	3800035731156
Code	ELZ_3272
Brand	ELIZ

The ELIZ EL 51 offers three selectable power levels (1500 / 3500 / 5000 W), enabling adjustment to different flow rates and temperature demands. The IP24 rating ensures basic protection against dust and water splashes, making it suitable for wet environments. The minimum activation pressure of 2 bar is essential for ensuring proper flow through the heater and preventing dry running. The inclusion of a thermal fuse adds an additional layer of safety, especially in cases of overheat. The compact dimensions (145 x 232 x 84 mm) allow for installation in tight spaces while still providing sufficient power for most domestic applications.

Installation and connection

To install the ELIZ EL 51, begin by ensuring that the water supply is turned off and the installation surface is stable and dry. The unit connects via a 1/2 inch inlet and must be paired with the supplied pressureless valve. Confirm that the valve is correctly seated and sealed to prevent leaks. The electrical connection requires a 230 V supply with a 25 A circuit breaker. It is crucial to verify that the wiring is secure and that the earth connection is intact. Before commissioning, check the minimum water pressure requirement of 2 bar to ensure proper operation. A common mistake during installation is using non-matching valves, which can lead to pressure issues or overheating. Always use the provided valve and ensure the device is mounted vertically to maintain optimal performance.

Compatibility and accessories

The ELIZ EL 51 is specifically designed to work with the supplied pressureless valve, which must be used to ensure correct water flow and pressure regulation. No additional accessories are required for standard installation, as the heater includes all necessary components for immediate use. It is compatible with standard cold water supplies and can be integrated into existing plumbing systems with minimal modifications. The heater is not intended for use with external expansion vessels or pressure boosters, as it is designed for low-pressure operation. When planning the installation, ensure that the electrical system supports the maximum current draw of 25 A and that the circuit is dedicated to this unit.

Technical background for designers

The ELIZ EL 51 operates by heating water as it flows through the unit, using two internal heating elements that can be switched between three power levels. This direct heating method eliminates the need for a storage tank and reduces heat loss. The heating elements are enclosed within a protective sheath, which helps prevent scale buildup and improves resistance to air bubbles in the water flow. The device integrates into the system via a 1/2 inch inlet and relies on a minimum water pressure of 2 bar for activation. The thermal fuse and dual waterproof switch provide multiple layers of protection against electrical faults and overheating. The longevity and efficiency of the unit depend on maintaining consistent water flow and avoiding dry operation, which can damage the heating elements.

Service and operation

During regular operation, the ELIZ EL 51 requires minimal maintenance. Periodically check the water flow and pressure to ensure that the minimum activation level of 2 bar is maintained. Inspect the electrical connections for signs of wear or corrosion, and verify that the earth wire remains intact. The thermal fuse provides automatic reset functionality in case of overheat, but repeated activation may indicate a fault in the system. If the device fails to operate, disconnect the power and inspect the valve and water supply for blockages. No specific service intervals are defined for routine maintenance, but annual inspections are recommended in high-use environments to ensure continued performance.

Frequently asked questions

Can the ELIZ EL 51 be used with a standard cold water supply?
Yes, the heater is designed for use with a standard cold water supply and does not require a separate hot water line.

Is it possible to use the heater with a different valve than the one supplied?
No, the heater must be used with the supplied pressureless valve to ensure correct operation and safety.

What should be done if the heater does not turn on?
Check the water pressure is at least 2 bar and that the valve is fully open. If the issue persists, disconnect the power and inspect the electrical connections.

How is the power level adjusted on the ELIZ EL 51?
The power level is adjusted using the dual waterproof switch on the device, allowing selection between 1500, 3500, or 5000 W settings.

Documents for download

• Technical documentation (PDF)