Boiler Radiant R1CR 34 PDF Manual – Complete Guide for Use and Maintenance

The condensing boiler Radiant R1CR 34 exploits the condensation process of the water vapor in the fumes to recover latent heat, thus offering significantly higher energy efficiency than traditional boilers.

Unlike conventional boilers, which lose a significant portion of sensible heat to prevent corrosive condensation, condensing boilers capture and reuse this heat. This makes gas heating with condensation technology not only more efficient but also more economical. Replacing an outdated boiler with a condensing one can reduce energy consumption by up to 20%.

Annual Boiler Maintenance

Annual maintenance is indispensable to preserve the safety, efficiency, and reliability qualities of your device. This annual intervention prevents malfunctions and ensures the continuous safety of the system.

Essential Tips for Your Boiler in Winter

• Pressure Monitoring: Check your Radiant R1CR 34 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 Radiant R1CR 34 boiler to expert technicians.

Managing Pressure in the Heating System

Checking the heating system’s pressure every quarter is crucial to ensure it remains between 1bar and 2bar. This check is also fundamental in summer, as the radiator water is used for sanitary water heating. If the pressure drops too low, the boiler may cease to operate.

To adjust the pressure, locate the filling tap under the appliance, usually green, open it until the pressure gauge reaches 1.5bar, then close it.

Check the Temperatures

On the Radiant R1CR 34 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.

Instructions for Cleaning Shower Filters and Heads

Follow our detailed instructions to clean the aerator filters and shower heads of your shower. Preventing limescale buildup is essential to avoid issues with filter removal and fluctuations in water temperature. Proper maintenance ensures the longevity and efficiency of the Radiant R1CR 34 boiler.

Boiler Safety During the Holidays

It’s crucial to take some precautions with your Radiant R1CR 34 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.

Energy Saving in Hot Water Production

Our R2K rapid instant boiler is designed with the environment in mind. Thanks to its sensitive flow meter, it accurately regulates hot water delivery, maintaining a constant temperature and reducing energy consumption, ideal for buildings with varying water pressure.

Sustainability with FAST-H2O

FAST-H2O, our eco-friendly technology, preheats the water in the exchanger, ensuring immediate delivery and reducing waste. This system not only improves user comfort but also contributes to more sustainable resource use.

• Instant and sustainable hot water delivery
• Improved comfort with less waiting and waste
• Contribution to energy saving and sustainability

To activate the FAST-H2O function, simply press the and buttons on the Sanitary control panel.

Advanced Technology and Safety

The R1CR 34 boiler, with its cutting-edge technology provided by NORDGAS, ensures a safe and reliable user experience. Every aspect of the electronics is designed to maximize efficiency and safety, from the daily auto-reset system to thermal shock management and error control.

Advanced Error Management

The R1CR 34 boiler uses an error code system for easy identification and problem-solving. Errors are communicated through a clear display, allowing users to quickly understand the nature of the problem. In addition, advanced features such as frost protection and the FAST-H2O hot water preheating system ensure maximum efficiency and comfort in every situation.

• F08 Anti-freeze heating function active: In case the boiler is outside and reaches a very low temperature, this procedure starts to prevent freezing of the technical water. Wait for the operation to complete
• F33 Plant Ventilation Cycle: Normally happens during the restoration of error E04, once the Radiant R1CR 34 boiler pressure is restored, the boiler performs this function lasting about 2 minutes. Wait for the operation to complete.
• FH Fast H20: The boiler is preparing for the preheating of sanitary water. Wait for the procedure to end

Advanced Technology for Reduced Noise and Consumption

The Radiant boiler series stands out for the use of advanced technologies that ensure silent operation, equivalent to a whisper of 55 decibels, and superior energy efficiency. The innovative noise reduction system, including a MOPLEX muffler and a cushioned front panel, significantly reduces decibel levels. In terms of consumption, innovative techniques for flame modulation and temperature control, along with the modulating WILO circulator, ensure high performance with contained energy consumption.

Boiler Safety and Maintenance

It is important to subject the R1CR 34 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.

Regarding the Use of Electric Energy

• Do not touch the appliance with wet or damp parts, or while barefoot
• Do not pull on electrical cords
• Do not expose the appliance to atmospheric agents such as rain, sun, etc., unless expressly provided for.
• In case of damage to the cord, turn off the appliance and consult exclusively professionally qualified personnel for its replacement.

In Case of Gas Odor

• Do not operate electrical switches, the phone, or any other device that may generate electrical discharges or sparks.
• Immediately open doors and windows to create an air exchange that can quickly clear the room.
• Close the gas taps.
• Request the immediate intervention of professionally qualified personnel.

Information on Components and Spare Parts

Here is an informative resource that covers a wide range of components and spare parts for the R1CR 34 boiler. Each element is described in detail to help you better understand its role within the appliance and how to maintain it optimally.

Temperature Adjustment

On the control panel of the Radiant R1CR 34 condensing boiler, you can find all the operational information. You can set the temperatures for heating or hot water by pressing the + and – buttons next to their respective symbols: Faucet and Radiator. After pressing, the boiler displays the set temperature for only a few seconds.

Normally, the boiler shows the flow temperature, to be interpreted as the internal temperature of the boiler. As a result, you will see the temperature rise even in summer when the Radiant R1CR 34 boiler produces hot water, while in winter it can be interpreted as the current temperature of the radiators.

Using the + and – buttons at the top for heating and at the bottom for domestic hot water, you can choose the desired temperatures for heating. We suggest:

• From 25°C to 38°C if you have underfloor heating.
• From 55°C to 65°C if you have radiators made of aluminum or steel.
• From 45°C to 60°C if you have cast iron radiators.

For domestic hot water, you can choose the temperature using the + and – buttons at the bottom. We suggest a temperature between 38 and 45°C.

The general advice for the temperature of domestic hot water is to keep it as low as possible, especially if your water supply provides very hard water (over 30°F).

Boiler Filling Tap of R1CR 34

The filling tap is an essential component for maintaining optimal pressure inside the R1CR 34 boiler. This tap, usually located at the bottom of the boiler (as shown in the image), should be opened when the system’s pressure drops below 1 bar.

To refill the system, slowly open the tap until the pressure reaches the recommended level, usually around 1.5 bar. It is crucial to remember to close the tap after refilling to avoid overpressure that could damage the boiler or the system.

Quality and Performance of the Radiant Exchanger

The design of the patented Radiant exchanger is the result of extensive research to improve the quality of sanitary water heating. Its plate structure represents a cutting-edge solution, ensuring efficient operation and lower noise emission.

Specifically designed for the R1CR 34 boiler, the Radiant exchanger offers constant and uniform heating, extending the component’s lifespan and maintaining high performance over the years.

Nordgas MIAB 3000

The Nordgas MIAB 3000 board is an advanced and indispensable component for the R1CR 34 condensing boiler. This board manages the entire operational logic of the boiler, ensuring optimal control of heating functions and domestic hot water production.

Equipped with an integrated display and button panel, the MIAB 3000 board makes monitoring and adjusting the boiler settings easy and intuitive. Its cutting-edge design ensures a user-friendly interface, allowing users to easily interact with the boiler for efficient and personalized operation.

Plate Heat Exchanger for Domestic Hot Water

The plate heat exchanger is a fundamental component in the Radiant R1CR 34 boiler, designed to efficiently heat domestic hot water. Inside this exchanger, the technical water of the heating circuit and the cold water from the water supply cross in dedicated passages, allowing optimal thermal exchange that heats the domestic water. The advantages of the plate exchanger in the Radiant R1CR 34 boiler include its resistance to water flow reduction. However, it is important to underline that over time, the exchanger can develop limescale deposits. These deposits can lead to a slight cooling of the domestic hot water. To maintain the efficiency of the plate exchanger, it is recommended to replace the component in case of significant scaling, as cleaning with acid solutions is not always effective. Another preventive measure is the use of a polyphosphate doser and maintaining low operating temperatures for hot water, to minimize the risk of calcification.

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.

Automatic Plastic Air Purger

The plastic automatic air purger, used as an insert in the purging housing in the pump manifold, is a key component in the Radiant R1CR 34 boiler. This small element plays a vital role in ensuring the efficiency of the heating system by eliminating air from the system.

Made of durable plastic, this air purger is designed to easily fit into the dedicated housing in the pump manifold. Its use is particularly recommended to prevent air accumulation in the boiler’s hydraulic circuitry, especially in systems with a lot of aluminum where this problem is more frequent after periods of inactivity (summer).

Regularly checking and replacing the air purger and the system pressure is essential for maintaining uninterrupted operation at the start of the heating season. Its functionality is crucial for the proper operation of the entire domestic heating system.

3/8 Automatic Air Purger

The 3/8 automatic air purger is a fundamental component in the Radiant R1CR 34 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.

Safety Systems according to the ErP Directive

The construction and installation of boilers in Europe are strictly regulated by a series of European standards, aimed at ensuring safety, energy efficiency, and reduction of environmental impact.

One of the main reference regulations is the ErP (Energy-related Products) Directive, which imposes stringent requirements in terms of energy efficiency and emissions for all energy-related products, including boilers. This directive is accompanied by specific UNI EN standards for each type of boiler, detailing the technical and safety standards to be respected.

The R1CR 34 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 condensing boiler Radiant R1CR 34 requires special attention to the correct installation of the flue pipe. Especially in horizontal sections, condensation can form, compromising the functionality of the fan. It is not uncommon to see installations where the flue pipe (especially if corrugated) forms a siphon, causing the boiler to produce very loud noises. 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 R1CR 34 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 Radiant R1CR 34 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 Radiant R1CR 34 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.

Accessory Guide

Elevate the performance of your R1CR 34 boiler with our selection of essential accessories, we recommend:

• New Generation Programmable Thermostat: Manage ambient temperature with precision and ease, thanks to intelligent programming and remote control.
• Magnetic Filter Dirt Separator: Protects your heating system from harmful residues, ensuring greater longevity and efficiency.

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 should be applied on the heating return line to the boiler, separating everything that could clog the boiler and cause temperature increases in the primary exchanger. The diverter valve is also less stressed, and the adoption of the magnetic filter could prevent its leakage.

Polyphosphate Dosing Pump

If the hardness of the tap water exceeds 20 French degrees, we suggest equipping the boiler with a polyphosphate doser.

This powder or liquid additive is proportionally mixed with the cold water entering the boiler and decreases the formation of limescale inside the device. Polyphosphates need to be replenished whenever they run out.

There are various models, but the most common ones are:

• Powder Polyphosphates
• Liquid Polyphosphates

Clearly, the type of polyphosphate requires a suitable mechanism for mixing.

Customize Home Climate with a Thermostat

Get the most out of your Radiant R1CR 34 boiler with a customizable room thermostat or programmable thermostat.

These solutions allow you to create the ideal home environment by regulating the temperature according to your specific needs. Choose a programmable thermostat to set varied schedules, adapting the home climate to your daily and weekly rhythms and improving energy efficiency.

Among the available models, you will find:

• Daily Programmable Thermostats
• Weekly Programmable Thermostats
• Smart Thermostats with Smart Functions

The ideal choice should respond to your preferences and the technical characteristics of your Radiant R1CR 34 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.

Anomaly Reporting Codes for R1CR 34

Frequent Questions

To help you resolve doubts and questions about your Radiant R1CR 34 boiler model, we have prepared a list of Q&A covering the most common issues. Find the answers you are looking for optimal use of your appliance.

Hot Water takes forever to reach the shower/bathroom !!

The delay in hot water reaching the bathroom is often caused by a buildup of dirt in the aerator or showerhead holes. This buildup can reduce water flow, consequently slowing down the flow of hot water in the pipes. Cleaning these accessories from limescale can usually restore the speed of the hot water arrival.

Additionally, if the pipes connecting the bathroom to the boiler are made of iron, they might absorb some of the water’s heat, lengthening the time for hot water to arrive. The presence of iron pipes can thus affect the timing of hot water delivery to the bathroom.

Loud Noises During Operation

If your Radiant R1CR 34 boiler makes loud noises during operation, first check the system pressure. Too low a pressure can be the cause. Otherwise, in this condensing boiler, it could occur due to lack of maintenance.

Indeed, the heat exchanger tends to slightly oxidize during operation and over time a large amount of dirt can accumulate in the condensate siphon. Regular maintenance is essential to reduce the risk of noises or machine shutdowns.

Opentherm Protocol Support by the Boiler

YES: The boiler is pre-equipped for a tension-free connection with an Advanced Thermostat or Remote Control. The functionalities offered include:

• Control of domestic hot water temperature: Useful for R1CR 34 boilers installed in less accessible locations.
• Adjustment of radiator temperature: An advanced Opentherm chronothermostat allows communication of the desired radiator temperatures to the boiler.
• Time scheduling for water heating: Beneficial for boilers with storage tanks, helping to reduce boiler maintenance costs, like gas.
• Error Resolution: Through Opentherm 2 or with devices from Radiant.
• etc…

Pressing the buttons to adjust the heating, the temperature does not change.

The button panel is sensitive to repeated presses after years of operation. Often, the malfunction of the adjustment buttons is due to the absence of a thermostat, which has led to the exclusive use of the boiler’s buttons.

In light of this, it is suggested to install a new control board to restore the correct functioning of the button panel, but also to integrate a thermostat to continue adjusting the heating from another, more reliable, and less expensive device.

Downloadable Manuals

• Brochure for Radiant Boiler R1CR 34
• Technical Manual for Radiant Boiler R1CR 34