Thermoflow ELEX21 Electronic Instantaneous Water Heater User Manual

1. Introduction

Thank you for choosing the Thermoflow ELEX21 Electronic Instantaneous Water Heater. This manual provides essential information for the safe and efficient operation, installation, and maintenance of your new appliance. Please read this manual thoroughly before installation and use, and keep it for future reference.

Figure 1: Thermoflow ELEX21 Electronic Instantaneous Water Heater. This image shows the front view of the white instantaneous water heater with a digital display showing "38°C" and control buttons below it.

2. Safety Information

Important: Read all safety warnings and instructions carefully before installing or operating this appliance. Failure to follow these instructions may result in electric shock, fire, or serious injury.

• Installation of this appliance must be carried out by qualified tradesmen and approved by the corresponding network operator.
• Do not operate the water heater if it is damaged or malfunctioning.
• Ensure the power supply matches the appliance's specifications (400V 3~ 50Hz).
• Always disconnect the power supply before performing any maintenance or repair work.
• This appliance is designed for indoor use only.
• Keep children and unauthorized persons away from the appliance during operation.
• Protect the appliance from freezing temperatures.

3. Setup and Installation

The Thermoflow ELEX21 is designed for wall mounting. Ensure the installation location is suitable, providing adequate space for maintenance and proper ventilation.

3.1 Pre-Installation Checks

• Verify that the electrical installation meets the requirements for a 21 kW appliance (400V 3~ 50Hz, 30-32A protection, minimum 4 mm² cable section).
• Ensure water pressure is within the specified range (minimum flow pressure 0.1 MPa, maximum allowed pressure 0.6 MPa).
• Confirm water connections are G 1/2".

3.2 Mounting the Appliance

1. Select a suitable wall location, ensuring it can support the appliance's weight (4.4 kg).
2. Mark the drilling points using the provided mounting template or by measuring the appliance's mounting holes.
3. Drill holes and insert appropriate wall plugs.
4. Securely mount the appliance to the wall using the provided mounting accessories.

3.3 Water and Electrical Connections

• Connect the cold water inlet and hot water outlet to the appliance's G 1/2" connections. Ensure all connections are watertight.
• Connect the appliance to the electrical supply according to local regulations and the appliance's specifications. This is a wired connection.
• Before switching on, ensure the appliance is completely filled with water to prevent damage to the heating elements.

4. Operating Instructions

The Thermoflow ELEX21 is an electronic instantaneous water heater designed to provide hot water on demand for multiple points of use, such as sinks, showers, and bathtubs.

4.1 Initial Start-up

1. Ensure the appliance is properly installed and filled with water.
2. Switch on the main power supply to the water heater. The LED display will illuminate.
3. The factory default temperature setting is 40°C.

4.2 Temperature Adjustment

• Use the '+' and '-' buttons on the control panel to adjust the desired water temperature.
• The temperature range is from 0°C to 75°C. The LED display will show the set temperature.
• The appliance will automatically heat the water to the set temperature as it flows through.

4.3 Energy Efficiency

This appliance has an energy efficiency class of A for water heating, with an annual energy consumption of 461 kWh. Its hot water heating efficiency is 40%.

Figure 2: Energy Efficiency Label. This label indicates an energy efficiency class of A for water heating, with an annual energy consumption of 461 kWh and a sound power level of 16 dB.

For more detailed energy information, refer to the EPREL database via this link: https://eprel.ec.europa.eu/qr/1160656

5. Maintenance

Regular maintenance ensures the longevity and efficient operation of your Thermoflow ELEX21 water heater. Always disconnect the power supply before any maintenance.

5.1 Cleaning

• Clean the exterior of the appliance with a soft, damp cloth. Do not use abrasive cleaners or solvents.
• Periodically check the water outlets (e.g., shower heads, faucet aerators) for limescale buildup and clean as necessary to maintain optimal flow.

5.2 Descaling

In areas with hard water, limescale can build up inside the appliance, affecting its efficiency. Descaling should be performed by a qualified technician. The frequency depends on water hardness and usage.

5.3 Winterization (Frost Protection)

If the appliance is installed in an area where temperatures may drop below freezing, it must be drained to prevent damage from freezing water. Consult a qualified technician for proper winterization procedures.

6. Troubleshooting

Before contacting customer support, please refer to the following table for common issues and their solutions.

7. Technical Specifications

8. Warranty & Support

For warranty information, please refer to the terms and conditions provided at the point of purchase or contact your retailer. Thermoflow products are manufactured to high standards, and support is available for any technical inquiries or issues.

8.1 Customer Support

For technical assistance or service inquiries, please contact the distributor:

• Company: NEG Novex Großhandelsgesellschaft für Elektro- und Haustechnik GmbH
• Email: produktmanagement@neg-novex.de
• Phone: 06232298500
• Website: www.respekta.de
• Address: Chenover Strasse 5, 67117 Limburgerhof, Germany

Please have your model number (ELEX21) and purchase date ready when contacting support.