Open Chamber Boiler Euroterm SIMPLEX 20 J Manual – Complete Guide

Designed for compact spaces, the SIMPLEX 20 J by Euroterm is a quick instantaneous boiler.

Suitable for small and medium apartments, this boiler is already in use in many residential buildings.

This model, a category B, requires a ventilation hole in the installation room. It’s important to note that it is not suitable for installation in bedrooms or bathrooms.

Annual Maintenance and Safety

To ensure that the boiler maintains its safety and efficiency performance, it is essential to subject it to regular maintenance every year. The annual review is vital to ensure the safety and proper ongoing operation of the device.

Essential Tips for Your Boiler in Winter

• Pressure Monitoring: Check your Euroterm SIMPLEX 20 J boiler’s pressure gauge to ensure correct pressure.
• Thermostat Batteries: Replace the batteries of the room thermostat to ensure maximum efficiency.
• Heating Pressure Check: Keep the heating system pressure between 1 and 1.5 bar for effective heating.
• Qualified Assistance: Entrust the maintenance and cleaning of your Euroterm SIMPLEX 20 J boiler to expert technicians.

Check the Heating System’s Pressure

At least every quarter, ensure that the system’s pressure is correct; it should be between 1bar and 2bar. Also check this in the summer, as the boiler uses radiator water (only in internal circulation) to heat domestic hot water. If the pressure is low, the boiler is equipped with a component that stops the production of heating or hot water.

Remember to use the filling tap, found under the appliance. Open it and check that the pressure gauge reaches 1.5bar, then close it.

Check the Temperatures

On the Euroterm SIMPLEX 20 J boiler, there are two knobs for adjusting the temperatures for domestic hot water and heating.

Pay attention to temperature settings:

• The heating temperature adjustment refers to the radiator temperature, not the ambient temperature.
• The domestic hot water temperature setting should be kept as low as possible to avoid calcification in the secondary heat exchanger.

In general, we suggest setting the domestic hot water temperature to mix it with cold water as little as possible under the shower. This helps to prevent long-term limescale buildup.

Regarding heating, we suggest setting a temperature based on the season.

Preventing Limescale in Showers: Filters and Shower Heads

Preventing limescale buildup in shower head aerator filters is crucial for maintaining an efficient sanitary system. Excessive buildup can complicate the removal of aerators and lead to unwanted overheating. We recommend regular replacement of these elements to preserve the functionality of the Euroterm SIMPLEX 20 J boiler.

Preparing Your Boiler for the Holidays

Before leaving for the holidays, it’s essential to take precautions to ensure the safety and efficiency of your Euroterm SIMPLEX 20 J boiler. Even the latest models are not immune to possible leaks.

Here are some recommended measures:

• Close the domestic hot water supply valve to prevent possible water leaks.
• Shut off the gas supply to prevent safety issues.
• Turn off the heat generator to reduce energy consumption and increase safety.

Upon your return, restore all these settings in the reverse order. You will likely need to rearm the heat generator to resolve any ignition errors caused by the shutdown.

These simple actions will allow you to enjoy your holidays with greater peace of mind, knowing that your home and boiler are safe.

Boiler Safety and Maintenance

It is important to subject the SIMPLEX 20 J boiler to annual maintenance to ensure its efficiency and safety. Interventions on the boiler by unqualified people are strongly discouraged, as they can compromise the safety of the appliance. For any problem or anomaly, it is essential to turn to an expert technician. Remember that periodic maintenance by professionals is crucial for the longevity and safety of the appliance.

Warnings for the Use of Electric Energy

For safe use of the boiler, it is important to follow some basic rules:

• Do not touch the appliance with wet or damp body parts and avoid doing so barefoot.
• Avoid pulling electrical cords and ensure they are not damaged.
• Do not expose the appliance to adverse weather conditions such as rain or direct sunlight, unless otherwise indicated.
• In case of damage to the electric cord, immediately turn off the appliance and contact a qualified technician for replacement.

Additionally, ensure that the boiler is installed, put into operation, and maintained by authorized technicians to guarantee the validity of the warranty and safety in use. Improper use of the appliance and any unauthorized alterations could pose safety risks.

What to Do in the Presence of Gas Odor

In situations of potential gas leakage, it is crucial to follow these guidelines:

• Avoid using any electrical device that could trigger sparks, including the phone.
• Immediately ventilate the environment by opening doors and windows.
• Close the gas taps to stop the leakage.
• Promptly call for urgent intervention by expert and qualified personnel.

The boiler should be used exclusively according to the manufacturer’s instructions and for heating water to safe temperatures. Improper use can cause serious damage. Ensure that installation and maintenance are entrusted to authorized technicians to avoid risks and ensure compliance with safety regulations.

Index of Components and Spare Parts

Use this section as an index to navigate through the different components and spare parts of the SIMPLEX 20 J boiler. You will find clear descriptions and practical advice for each part, which will help you manage the maintenance of your appliance in the best possible way.

Giannoni Type F Diverter Valve in Euroterm SIMPLEX 20 J Boilers

The Giannoni Type F Diverter Valve is crucial for the proper functioning of the Euroterm SIMPLEX 20 J boiler, especially in managing domestic hot water. This pressure-activated valve operates when the tap is opened, ensuring the efficient delivery of hot water. It is sensitive to dirt and sludge, so the use of a magnetic dirt separator filter is recommended. In buildings with reduced water pressure, it is important to keep aerators and showerheads clean to ensure valve activation.

Functionality of the Primary Heat Exchanger

The copper primary heat exchanger of the Euroterm SIMPLEX 20 J boiler plays a vital role in the thermal efficiency of the system. Thanks to its breadth, it guarantees excellent heat exchange.

The overtemperature sensor is positioned to detect and prevent overheating risks, avoiding issues like internal boiling.

Blockages in the pipes can cause problems with this component, leading to noise and reduced water flow. Preventive maintenance, including the installation of a Magnetic Filter, can help reduce such risks.

Anti-Refoulaire Flue Cap

The anti-refoulaire flue cap, essential for the safety and efficiency of your Euroterm SIMPLEX 20 J boiler, requires careful maintenance. This component, crucial for the proper disposal of fumes, is assembled with sheet metal pieces joined by rivets.

Over time, the rivets can wear out. During maintenance, it is crucial to check their condition and, if necessary, replace them with screws to ensure the integrity and safety of the cap.

It is important to know that the flue cap is specific to each boiler model and difficult to adapt from other models. Additionally, the cap may experience condensation if the flue does not have adequate draft. Regular inspection and careful maintenance are essential for the optimal operation of your Euroterm SIMPLEX 20 J boiler.

CIMM CP387 Expansion Vessel for Boilers

The CIMM CP387 expansion vessel is designed to accurately regulate pressure in the Euroterm SIMPLEX 20 J boiler, with a durable design in red color and a standard 3/4-inch connection.

It is vital to perform periodic checks to maintain the efficiency of the expansion vessel, thereby preventing harmful pressure variations in the system.

Common problems include damage to the membrane and corrosion of the metal shell, which can negatively affect the operation of the heating system.

3/8 Automatic Air Purger

The 3/8 automatic air purger is a fundamental component in the Euroterm SIMPLEX 20 J boiler to ensure the elimination of air in the heating system. This small but essential device plays a critical role in maintaining the efficiency of the heating system.

Despite its low cost, this component is vital to ensure that there is no trapped air in the radiator system, especially for aluminum ones, where the presence of air can be a frequent problem, particularly after long periods of inactivity like during the summer.

Checking the functionality and replacing the air purger is always advised to prevent circulation problems at the beginning of the heating season. Its efficiency is crucial for the proper operation of the entire domestic heating system.

Brahma TM 11 Control Unit

The Brahma TM 11 control unit is a key element for managing ignition in type B boilers, controlling crucial components such as the gas valve and spark plugs. Its design, unchanged from the original, ensures easy availability.

Upon receiving electrical power, the TM 11 starts the ignition process, from assessing the flame lock system to activating the gas valve and piezoelectric ignition.

The TM 11 is versatile, supporting both single and double ignition, for more efficient burner operation.

Frequent problems include faults in the gas valve relay, unusual noises from the relay, and defects in the detection systems.

Grundfos UPS15/60 Pump Performance

Enhance the performance of your SIMPLEX 20 J boiler with the Grundfos UPS15/60 pump, designed for superior water circulation. Choose from three speed levels to maximize efficiency, with the third speed recommended for the best performance, except in the presence of circulation noises.

The pump, generally easy to install by a professional, may present difficulties in removing the stator from the cast iron head after a long period of use.

Technical specifications of the Grundfos UPS15/60:

• Power Supply: 2.5 μF 230V – 50Hz IP44 TF 95
• High Speed (III): 0.38 A – 85 W
• Medium Speed (II): 0.30 A – 65 W
• Low Speed (I): 0.21 A – 45 W

Suitable also as a replacement for models UPS 15-50, 15-60, 25-50, 25-60, 15-65, 25-65.

Safety systems are fundamental components in the design and operation of boilers. They ensure the correct functioning of the device, preventing dangerous situations for users and the environment.

The SIMPLEX 20 J boiler therefore includes:

The Safety Thermostat, located on the heating supply, intervenes by blocking the gas flow to the burner in case of overheating of the water in the primary circuit. It is essential to never deactivate this safety device.

The Flame Ionization Detector ensures safety by shutting down the boiler in case of gas absence or incomplete ignition of the main burner.

The Antifreeze Device activates the burner to maintain the water temperature above 5 °C, preventing freezing of the system.

The Hydraulic Safety Valve, set at 3 bar, protects the heating circuit. It is advisable to connect it to a siphoned drain and not use it to empty the circuit.

Possible Improvement Works

The Euroterm SIMPLEX 20 J boiler requires special attention to the flue pipes. It is essential to have a qualified technician ensure that the pipes are in optimal condition and comply with regulations.

Suitable Flue Pipes

The flue pipes for the Euroterm SIMPLEX 20 J boiler must comply with safety standards and be equipped with adequate seals to ensure efficiency and safety.

Recent stainless steel pipes with seals are the recommended option. In contrast, corrugated aluminum pipes or white enamel pipes without seals are not up to standard. It is essential to regularly check the quality and condition of the flue pipes.

For further information and specific advice, it is recommended to consult a qualified technician and adhere to current regulations.

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 SIMPLEX 20 J 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 Euroterm SIMPLEX 20 J 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 Euroterm SIMPLEX 20 J 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 SIMPLEX 20 J 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 magnetic filter, installed on the heating return line to the boiler, is essential for maintaining system efficiency. It retains harmful elements like dust and debris, preventing boiler blockage and reducing the risk of overheating the primary exchanger. Additionally, it helps to reduce pressure on the diverter valve, thus increasing its lifespan and reducing the chances of leaks.

Choosing a Polyphosphate Doser

For hard waters exceeding 20 French degrees, we recommend the use of a polyphosphate doser for the Euroterm SIMPLEX 20 J boiler.

These devices mix polyphosphates, either in powder or liquid form, with the incoming water, minimizing limescale formation in the Euroterm SIMPLEX 20 J boiler. The choice of the right doser depends on the specific needs of the system and the type of water.

Polyphosphates are primarily available in two forms:

• Powder Polyphosphates
• Liquid Polyphosphates

The selection of the polyphosphate influences the type of mixing device required.

Thermostat and Programmable Thermostat

Maximize comfort and efficiency of your Euroterm SIMPLEX 20 J 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 Euroterm SIMPLEX 20 J boiler.

Daily Programmable Thermostat

The daily programmable thermostat is an effective solution for daily temperature control in your home.

This device allows you to set the desired temperature for each individual day, enabling flexible management adaptable to your daily routines. It is ideal for those seeking simple yet precise control of home heating, with the ability to adjust settings according to variations in their daily schedule.

Typical features of a daily programmable thermostat include:

• Easy and intuitive programming
• Precise temperature adjustment
• Energy-saving functions

This type of thermostat is an optimal choice for those who want to combine comfort and energy efficiency without the need for complex weekly programming.

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.

FAQ

Discover the answers to the most frequent questions about the Euroterm SIMPLEX 20 J boiler model. This quick guide has been compiled to provide clear and direct information based on the common questions from our users.

The Water is Too Hot

If the water from your Euroterm SIMPLEX 20 J 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.

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