Condensing Boiler BAXI LUNA 3 AVANT PLUS 240 FI Manual – Complete PDF Guide

The LUNA 3 AVANT PLUS 240 FI boiler, produced by BAXI, represents a transitional example in the boiler sector. Originally a low-efficiency boiler, it has been transformed into a high-efficiency model with the introduction of a component: the recuperator.

The recuperator is a device that exploits the residual heat present in the exhaust gases, which would normally be dispersed into the environment, to further heat the incoming water. This process not only increases the energy efficiency of the boiler but also helps to reduce the environmental impact.

Therefore, the LUNA 3 AVANT PLUS 240 FI boiler is equipped with a flat burner and a fume extractor, but the recuperator turns it into a condensing boiler.

Annual Maintenance

Annual checks are crucial to ensure optimal boiler performance, maintaining efficiency, safety, and reliability. These annual checks are fundamental to ensure the safety and ongoing effectiveness of the device.

Annually or at the Start of the Winter Season

• Regularly check the pressure shown by the pressure gauge.
• Check the batteries of the room thermostat.
• Ensure that the heating system’s pressure is between 1 and 1.5 bar.
• Contact qualified personnel for maintenance and cleaning.

Heating System Pressure Control

It’s important to check quarterly that the system pressure is maintained between 1bar and 2bar. This check is also necessary in summer, as the boiler uses radiator water to heat sanitary water. Too low a pressure can interrupt the production of heating or hot water.

Use the filling tap, located under the appliance, to adjust the pressure. Open it until the pressure reaches 1.5bar, then close it.

Boiler Temperature Management

Optimize the performance of your BAXI LUNA 3 AVANT PLUS 240 FI boiler by correctly adjusting the temperatures. Controlling the heating and domestic hot water (DHW) through the control panel is crucial for energy efficiency and preventing limescale problems.

Details on Temperature Adjustment:

• Heating Temperature Adjustment: Refers to the radiator temperature, not the ambient temperature.
• DHW Adjustment: Set the DHW to the lowest practical temperature to avoid calcifications.

Cleaning Shower Head and Aerator Filters

We suggest regularly maintaining shower head and aerator filters, which over time can become clogged with limescale. With the progression of scaling, the aerators become difficult to remove, and there is also overheating of the hot water temperature causing the BAXI LUNA 3 AVANT PLUS 240 FI boiler to frequently turn on and off. This is due to the wait for heat exchange between technical water and sanitary water.

Therefore, it’s good to have these accessories to replace as needed and frequently:

Boiler Safety During the Holidays

It’s crucial to take some precautions with your BAXI LUNA 3 AVANT PLUS 240 FI boiler before leaving for the holidays to prevent accidents and problems. This also applies to the latest generation boilers.

Preventive actions:

• Close the main water tap to avoid unexpected leaks.
• Shut off the gas to increase the safety of your home.
• Turn off the heat generator to limit unnecessary energy consumption.

Once you return, reactivate the settings by following the steps in reverse. You might need to restart the heat generator to cancel the shutdown errors.

With these simple steps, you can enjoy your vacation without worries, knowing that your boiler is safe and well managed.

Boiler Usage Warnings

To ensure the safety, efficiency, and performance of the LUNA 3 AVANT PLUS 240 FI appliance, annual maintenance is crucial. It is highly discouraged to intervene inside the boiler without adequate technical skills. In case of anomalies or malfunctions, it is important to always consult a qualified technician. Annual maintenance by specialized personnel is essential for the safety and continuous functioning of the appliance.

Safety Regulations for Electric Energy

Safety in the use of the LUNA 3 AVANT PLUS 240 FI boiler requires adherence to specific rules:

• Avoid contact with the appliance in the presence of moisture or while barefoot.
• Do not force or pull electrical cords, to prevent risks of short circuit or damage.
• Protect the appliance from atmospheric agents if not specifically indicated for outdoor use.
• In case of faults in the cord, stop using and rely on a specialized technician for repairs.

It is also important that any installation, initial ignition, and maintenance is carried out by qualified and authorized technicians to ensure proper functioning and compliance with the warranty. Use not in accordance with the instructions can be dangerous and invalidate the manufacturer’s liability.

Procedure in Case of Gas Leak

In the event of a suspected gas leak, it is essential to follow these instructions to ensure safety:

• Avoid operating electrical switches or devices that may create sparks.
• Open doors and windows to ventilate the area and disperse the gas.
• Immediately close the gas taps to prevent further leakage.
• Contact a qualified technician without delay for emergency intervention.

The LUNA 3 AVANT PLUS 240 FI boiler must be used only as intended: to heat water without bringing it to a boil. Any other use is improper and dangerous. Moreover, installation and maintenance must be carried out exclusively by authorized personnel to ensure safety and regulatory compliance.

List of Components and Spare Parts

In this guide, you will discover everything there is to know about the different components and spare parts of the LUNA 3 AVANT PLUS 240 FI boiler: how to identify them, their specific function, and useful tips for maintenance and replacement.

Variable Speed Modulating Pump for Boilers

New generation boilers are now equipped with variable speed modulating pumps, ranging from 0 to 100%, directly controlled by the electronic board through a second control connector. These innovative pumps offer significant energy savings, considerably reducing operating costs. Their ability to modulate speed according to the actual needs of the system makes the heating system more efficient and environmentally friendly. Current regulations require the use of these pumps in all new boiler installations, emphasizing their crucial role in increasing the energy efficiency of domestic heating systems.

Possible Improvement Works

The BAXI LUNA 3 AVANT PLUS 240 FI boiler requires special attention to the proper cleaning of the flue pipe. Especially at the bends leading to the vertical section, dirt can accumulate, compromising the functionality of the smoke fan. It is essential to have a qualified technician ensure that the pipes are in optimal condition.

Integrating a Gas Tap with a Test Well

Not always does the meter provide a connection for instrumental tightness testing. A useful tip is to replace the gas tap under the boiler with a valve with a well equipped with an instrumental take-off, essential for the tightness test of the system. This element can be crucial in case of inspections and safety checks and certainly facilitates the maintenance of the LUNA 3 AVANT PLUS 240 FI boiler.

In fact, during the maintenance of the appliance, it is mandatory to perform a suitable test like UNI 11137:2019 that verifies the correct tightness of the gas system.

Flushing the Heating System

Flushing the heating system is crucial to prevent clogging of the primary exchanger of the BAXI LUNA 3 AVANT PLUS 240 FI boiler. Over time, especially in cast iron or aluminum systems, a metallic sludge can form that can clog the narrow passages of the exchanger.

After flushing the system, it is highly recommended to install a magnetic sludge filter on the BAXI LUNA 3 AVANT PLUS 240 FI boiler. This filter plays an essential role in protecting the exchanger from the buildup of dirt and debris, ensuring greater efficiency and longevity of the heating system.

Additional improvements can include the installation of an advanced thermostat with relay function. This device allows for more effective management of heating hours, helping to optimize energy consumption.

Innovative Accessories

Enhance the functionality of your LUNA 3 AVANT PLUS 240 FI boiler with these cutting-edge accessories:

• Advanced Programmable Thermostat: Control the temperature of your home with intelligent solutions that offer flexible programming and interactivity.
• Magnetic Filter Dirt Separator: An indispensable accessory for maintaining the efficiency and cleanliness of your boiler’s hydraulic circuit.

Magnetic Filter for Heating

Considered the best accessory to block the entry of dust and debris from the heating system into the device.

The decision to install a magnetic filter on the heating return line is an important one to maintain the effectiveness and reliability of the boiler. This component is essential for filtering debris that could otherwise accumulate and hinder the proper functioning of the boiler, particularly regarding the primary exchanger and the diverter valve. It’s important to choose a high-quality filter and ensure it is correctly installed to fully benefit from its advantages.

Maintenance of the Polyphosphate Doser

If the tap water hardness exceeds 20 French degrees, a polyphosphate doser is recommended for the BAXI LUNA 3 AVANT PLUS 240 FI boiler.

The polyphosphate doser, which can use powder or liquid additives, is vital for reducing limescale in the BAXI LUNA 3 AVANT PLUS 240 FI boiler. These additives require constant replenishment to ensure maximum effectiveness.

Available in different variants, polyphosphates include:

• Powder Polyphosphates
• Liquid Polyphosphates

The choice of polyphosphate determines the type of mixing mechanism required.

Thermostat and Programmable Thermostat

Maximize comfort and efficiency of your BAXI LUNA 3 AVANT PLUS 240 FI boiler by installing a room thermostat or programmable thermostat.

These smart devices allow you to customize your home’s temperature, ensuring a pleasant environment and reducing energy consumption. Particularly, programmable thermostats allow you to set different temperature settings for each day of the week or specific times of the day.

Available models include:

• Daily Programmable Thermostats
• Weekly Programmable Thermostats
• Smart Thermostats with Remote Control

Choose the model that best meets the needs of your home and your BAXI LUNA 3 AVANT PLUS 240 FI boiler.

Daily Environmental Thermostat: Simplicity and Efficiency

For easy and intuitive home temperature control, the daily environmental thermostat is the perfect solution.

Suitable for those who prefer immediate and uncomplicated regulation, this device allows for easy temperature setting for each day, adapting to various routines. Ideal for seniors and for those who want to comply with energy efficiency regulations.

• Intuitive interface and easy programming
• Suitable for complying with energy regulations
• Cost-effective option with high practicality

An excellent choice for those seeking a balance between simplicity of use and compliance with energy regulations, without sacrificing savings.

Weekly Programmable Thermostat

For advanced and personalized home temperature management, the weekly programmable thermostat is an excellent choice.

This device allows for setting different temperatures for various days of the week, perfectly adapting to different weekly routines. It is ideal for those who need detailed heating control, with the ability to set lower temperatures on days when the home is empty and higher when it is occupied.

Key features of the weekly programmable thermostat include:

• Flexible programming for each day of the week
• Advanced energy-saving functions
• Intuitive user interface for easy programming

A weekly programmable thermostat is perfect for those seeking a balance between comfort, convenience, and energy efficiency, providing precise control of the home climate.

Advanced New Generation Thermostats

New generation advanced thermostats offer cutting-edge technologies for optimal home climate control.

These devices stand out for their learning capability and adaptation to user habits, automatically adjusting the temperature based on daily and seasonal patterns. With features like remote control via smartphone and integration with home automation systems, they offer an unprecedented level of convenience and energy efficiency.

Salient features of these thermostats include:

• Wi-Fi connectivity and remote control
• Integration with voice assistants and smart home systems
• Learning algorithms for automatic temperature optimization

For those seeking the utmost efficiency, convenience, and personalization in home temperature control, an advanced new generation thermostat is the ideal choice.

Useful Tips and FAQ

We have gathered a series of useful tips and answers to the most frequent questions to help you maximize the efficiency and lifespan of your BAXI LUNA 3 AVANT PLUS 240 FI boiler. Find out everything you need to know for its best management.

The Water is Too Hot

If the water from your BAXI LUNA 3 AVANT PLUS 240 FI boiler is too hot, it may be due to reduced water flow, especially if you are on the upper floors of a building. Check that the tap filters and showerhead holes are clean. If the problem persists, consider cleaning the secondary exchanger or consult a plumber to evaluate the installation of a pressure booster system.

Downloadable Manuals

• BAXI LUNA 3 AVANT PLUS 240FI Condensing Boiler Manual