Overview of double-circuit gas boilers Buderus 24 kW

Description of models

The brand in question, namely "Buderus", is one of the most well-known manufacturers, whose reputation is marked by consumer approval. Initially success accompanied this company, originally from German lands, because of their quality solid fuel boilers. But over time, the range of boilers operating on a variety of fuels has expanded significantly.

And the Buderus company also has such heating installations. Due to the unconditional quality, many retail buyers also worked with this brand, as well as those specialists who completely installed heating systems in houses.

But the most vulnerable point of the company's activity was the high cost of their products. However, a couple of years ago the company underwent a merger with Bosch, which helped to remove such a serious barrier to mass distribution of products. Now high quality products are available to people at a very budget price.

The market of sellers in Russia in the field of heating systems offers the consumer mounted gas boilers Buderus 24 kW.

1. Buderus Logamax U042/U044. Double-circuit gas-fired heating boiler, with a copper heat exchanger, bithermic. The power of such boilers is 24 kW:
   • type with a closed combustion chamber - U042;
   • type with an open combustion chamber - U044.
2. Buderus Logamax U052/U054. These heating boilers are available both in double-circuit design and with one heating circuit, through which the coolant circulates. Rated - 24 kW. The boilers have an excellent production of hot water - from 11 l/min to 13 l/min. The only bithermic heat exchanger is made of high quality copper. The markings for these boilers are as follows:
   • U054 - an open-type fuel combustion chamber, at the chimney the diameter is 131 mm;
   • U052 - this marking has closed-type boilers - the so-called turbocharged boilers;
   • the presence of article A indicates that this is a double-circuit boiler.
3. Buderus Logamax U052 T / U054 T. These heating boilers are distinguished by the fact that the model has a storage boiler that can hold 48 liters of hot water. Such models are relevant for use in those houses where a large consumption of hot water passes per day. They are also represented by closed and open combustion chambers. Boiler power - 24 kW.
4. Heating gas boilers such as the Buderus Logamax U072 model are the most economical options, but this does not mean that they are of poor quality. On the contrary, careful design has helped manufacturers to make it possible to sell good boilers with the greatest financial benefit to the consumer.

All models can be used under the following systems to remove combustion residues, i.e. smoke:

• under the coaxial chimney, size 60/100 mm;
• and a system that separates the removal of smoke, with forced fresh air and a size of 80/80 mm.

Mounting Features

Gas heaters are easy to install. The connection and the first start-up must be carried out by gas service specialists or workers with a special permit - this is exactly what the instructions for users prescribe. Self-installation is prohibited. You should not try to connect and start the boiler yourself - the gas workers will never give permission to operate it. Violation of this rule will void the warranty. Setting up and maintaining the equipment is also the responsibility of specialists - the user can fix only the most minor problems on his own. But there are requirements that it is useful for owners of gas equipment to know about:

• The connection is made using corrugated pipes approved for use by Gostekhnadzor.
• Installation must be carried out in a room that complies with SNiP and PPB.
• When making a connection to the chimney, the scheme “one device to one pipe” must be followed. For cascade connection, an upright coaxial chimney is required.
• The setup and the first start-up are carried out together with the gas service inspector - he puts the appropriate marks in the technical documentation.

Product Features

A wide range of Buderus brand gas boilers will please even the most fastidious buyers who are looking for something special for their home.

Next, consider the main features of products offered by a foreign manufacturer.

• Buderus technical products are certified and licensed. The manufacturer gives it an excellent warranty period. The equipment of the same name brand is produced by the world-famous company Bosch.
• Gas boilers from this brand can be installed in various technical rooms, and in residential areas. They are completely safe for health.
• In the assortment you can find floor and wall models of gas boilers. In addition, condensing boilers can be found in the range of the brand, which are famous for their savings in gas consumption. Wall-mounted options have less power compared to floor-mounted ones.
• The temperature can be easily adjusted manually, especially for floor models.

In addition, each of the models from the brand also has its own individual design and technical features.

Connection instructions

The Buderus boiler is connected after installation on a solid wall or a special ramp.

All communications are connected:

• Direct and return lines of the heating circuit.
• Water supply.
• Gas pipeline.
• Power supply.

Particular attention is paid to the condition of gas pipeline connections. They should be tested with soapy water for leaks.

Then the power supply is connected through a special socket with a ground electrode.

The boiler starts up after filling the system with water. It is poured using a make-up tap, bringing the pressure to about 0.8 bar.

This is necessary in order not to exceed the pressure when heated, so the water will expand. After filling the system, the boiler is turned on and the required temperature of the coolant is set. The burner will start, the boiler will start to work.

When starting for the first time after a long period of inactivity, it is often necessary to make several attempts to start due to air pockets in the system.When they are all removed, the operation of the unit will be stable and smooth.

Series and models

Boilers Buderus are available in different series.

Floor-standing units are implemented in the Logano series, consisting of 4 model lines:

• Logano G124WS. Single-circuit boilers with an open type burner. The line consists of 4 models with a capacity of 20, 24, 28 and 32 kW. The heat exchanger is made of cast iron and has a sectional design.
• Logano G234WS. Modified plant with a capacity of 60 kW. A single-circuit boiler of a new generation with an atmospheric burner, a sectional cast-iron heat exchanger.
• Logano G234X. Single-circuit floor boilers with increased power. Available in 4 models of 38, 44, 50 and 55 kW. It is possible to connect external indirect heating boilers.
• Logano 334WS. A range of floor-standing boilers with an atmospheric burner, the power of a unit reaches 135 kW. It is possible to combine in a cascade of 2 or 4 units with an increase in total power up to 270 kW. Can be used in conjunction with an external boiler with a capacity of up to 6000 liters.

Buderus wall-mounted boilers are represented by the Logamax series, consisting of three lines:

• Logamax U 072. A line of budget units with a capacity of 12, 24 and kW. There are single- and double-circuit modifications, with an open and closed burner. The most common and popular group of Buderus boilers.
• Logamax U 052/054. Single and double circuit models with a power of 24 or 28 kW. Models marked 054 are atmospheric and 052 are closed burners. If the designation contains the letter "K", then the boiler is double-circuit (combined).
• Logamax U 042/044. Double-circuit boilers with bithermic copper heat exchanger. Available with open (044) and closed (042) burners. The power is 24 kW.

All models are equipped with a self-diagnosis system and modern controls. Can be connected to a separate or coaxial chimney (user choice).

Advantages and disadvantages

The advantages of Buderus gas boilers should be considered:

• High quality of technology development, use of the most advanced developments.
• Details are made on the modern equipment, high quality of assembly.
• Low noise level.
• Affordability - compared to other European boilers, Buderus costs 1.5-2 times lower.
• Full automation of work, the presence of self-diagnostics.
• Work safety.

The disadvantages are considered to be:

• High demands on the quality of power supply.
• The need for pre-treatment of water.
• The cost of spare parts.

The disadvantages of Buderus boilers can be considered a feature of gas boilers, as they are inherent in all models without exception from any manufacturer.

Kinds

Buderus double-circuit boilers are available in various design options.

By type of installation there are:

• Wall models. Installation is carried out on solid surfaces with sufficient bearing capacity. It is forbidden to hang boilers on thin partitions or walls sheathed with plasterboard. For such cases, it is necessary to install on special load-bearing devices - ramps.
• Floor structures. Installation as such is not required, the boiler is placed directly on the floor or on a special stand. Since there is no need to limit the weight of floor structures, more powerful and durable components are usually included in the design, which allows increasing the power of the units.

Heat transfer method:

• Convection. These are installations with the usual cycle of heating the coolant in the flame of a gas burner.
• Condensing.The preheating of the coolant in the condensation chamber is used, where water vapor settles from the flue gases with the release of heat. Additional energy allows heating the heat carrier, which makes it possible to reduce the heating temperature in the primary heat exchanger. As a result, gas consumption is reduced, the service life of the main components of the boiler is increased.

IMPORTANT!
When choosing a condensation action model, one should fully understand the features and conditions of its operation. Such boilers can operate at full capacity only when the temperature difference between the room and the street is not more than 20 °

For most regions of Russia, this condition cannot be met.

Device

The main element is the primary heat exchanger, structurally combined with a gas burner. It heats the coolant, which at the outlet immediately enters the secondary plate-type heat exchanger (for double-circuit models).

Having given a certain amount of thermal energy for the preparation of hot water, the coolant passes into a three-way valve, where it finally receives the desired temperature by partially mixing in a colder “return”, after which it enters the heating circuit.

The movement of the liquid is provided by a circulation pump, the smoke is removed with the participation of a turbocharger fan.

All work is controlled by the control board and a system of self-monitoring sensors that notify the user of problems.

What series and models are wall-mounted

Buderus wall-mounted boilers are represented by one large Logamax line, which consists of 4 series:

• Buderus Logamax U042 / U044. Double-circuit installations with a power of 24 kW.Equipped with a bithermic heat exchanger, which allows you to simultaneously heat both the coolant and hot water. There are models with closed (042) and open combustion chamber (044).
• U052 / U054 K. Single and double circuit boilers with open (054) and closed (052) combustion chamber. For double-circuit models, the letter “K” (combined) is present in the designation. Two models are offered, 24 and 28 kW.
• U052 T / U054 T. 24 kW model with open or closed combustion chamber. A special feature is the presence of a storage tank for hot water with a capacity of 48 liters, which makes it possible to meet high demand for hot water.
• U072. The most popular series of turbocharged boilers with a capacity of 12, , and kW. There are single and double circuit models. High demand is due to the relatively low cost of boilers. Equipped with two heat exchangers - primary (for heat carrier) and secondary (for hot water). The most popular boilers are 24 and 35 kW, producing up to 12 and 16 liters of hot water per minute, respectively. Able to heat 240 and 350 m2 of residential, public or commercial space.

When choosing a boiler, you should compare its characteristics with the size of the room and the family's need for hot water. The manufacturer provides a choice for any conditions, which allows you to get the best option.

No. 5 - Navien DELUXE S24K

The fifth place in the TOP-10 is occupied by the Navien Deluxe S 24k wall-mounted device. It has a double-circuit design, a closed chamber, stainless steel heat exchangers. Power is regulated in the range of 10-24 kW. There is a circulation pump that automatically starts to work when the temperature in the house drops. Dimensions - 67x40x26 cm. Remote control and voice notification are provided.

Advantages:

• reliable system of settings and management;
• maximum information on the display;
• the ability to function at low pressure of the supplied gas;
• attractive design;
• affordable cost.

Minuses:

• noisiness;
• lack of a self-diagnostic system.

This boiler attracts with its small size, extended service life and high build quality.

Types

There are different modifications of Buderus wall-mounted boilers.

By the number of circuits:

• Single-circuit. Provide only heating of the heat carrier for the heating circuit.
• Double-circuit. At the same time, they are able to prepare hot water and heat the coolant for the heating system.

Combustion chamber type:

• Atmospheric (open). The air necessary for the combustion process is taken directly from the room in which the boiler is installed. Removal of smoke and other combustion products occurs with the help of natural draft of the furnace type.
• Turbocharged (closed). The air is taken in from outside and enters the boiler through the external pipeline of the coaxial chimney. For this, a turbocharger fan is used, which simultaneously ensures the removal of smoke.

For residential premises, it is more convenient to use turbocharged models, since natural draft is unstable and can be directed in the opposite direction by a strong gust of wind or a draft in the room.

By type of heat transfer:

• Convection. The traditional scheme of heating the coolant in the burner flame without additional procedures was used.
• Condensing. A technique that has appeared relatively recently. The liquid is preheated with the help of thermal energy obtained from the condensation of water vapor from the exhausted smoke.The prepared coolant does not require intensive heating, which reduces gas consumption and softens the operation of the heater and heat exchanger. In sum, this gives high efficiency (up to 108%, although this method of calculation is not correct and is a common marketing ploy), gas savings and an increase in the life of the heat exchanger.

IMPORTANT!
Condensing models are able to fully work only on low-temperature systems. If the working conditions do not allow the use of such modes, the purchase of a condensing boiler will become impractical.

Instructions for use and setup

The operation of Buderus boilers is not very difficult. All functions of the unit are simple, their adjustment is not difficult and is done using the appropriate buttons on the control panel.

The user does not perform any actions with the boiler, except for filling or draining the system.

For filling, an appropriate tap or drain valve is used. It must be remembered that adding cold water to a hot boiler is prohibited, otherwise the heat exchanger can be destroyed. After a long period of inactivity, thermal disinfection must be carried out.

The transition to the summer or winter period occurs at the request of the user by changing and saving the mode on the control panel.

Installation and adjustment of Buderus boilers should be carried out only by certified specialists from the service center, otherwise the warranty contract will be considered terminated at the initiative of the owner.

Models

Models with a power of 24 kW are available both among wall-mounted and among floor single-circuit boilers Buderus.

The manufacturer offers various options:

• Buderus Logamax U052/054-24. Model with closed or open combustion chamber.
• Buderus Logamax U072 24.The most budgetary and popular series of boilers. The 24 kW model has a copper heat exchanger and can be installed in a kitchen or other area of ​​a residential building.
• Buderus Logano G124-24WS. Floor standing boiler with cast iron heat exchanger. The weight of the unit (without water) is 127 kg. Able to work with an external boiler of significant size.

Choosing the best option, you should analyze the needs and prospects so as not to spend extra money.

Connection instructions

The boiler is connected after installation in a designated place.

Wall-mounted boilers are mounted on a solid vertical surface with sufficient bearing capacity, or on a special supporting structure - a ramp. Floor units are placed directly on the floor or on a special damping stand.

The connection of communications (gas, water, heating circuit) is carried out using special pipes located on the outside of the boiler. It is necessary to carefully monitor the tightness of the gas pipe connections.

Power must be supplied through the stabilizer, all electrodes must be connected in the correct order.

The boiler is filled with water until a pressure of about 0.8 bar is obtained.

This is necessary so that when the coolant is heated, the pressure does not exceed the limit value.

After that, the boiler is turned on and the temperature is adjusted. The burner will start and the system will start working.

The first connection, adjustment and start-up of the boiler must be carried out by the masters from the service center.

Types

There are different modifications of Buderus wall-mounted boilers.

By the number of circuits:

• Single-circuit. Provide only heating of the heat carrier for the heating circuit.
• Double-circuit.At the same time, they are able to prepare hot water and heat the coolant for the heating system.

Combustion chamber type:

• Atmospheric (open). The air necessary for the combustion process is taken directly from the room in which the boiler is installed. Removal of smoke and other combustion products occurs with the help of natural draft of the furnace type.
• Turbocharged (closed). The air is taken in from outside and enters the boiler through the external pipeline of the coaxial chimney. For this, a turbocharger fan is used, which simultaneously ensures the removal of smoke.

For residential premises, it is more convenient to use turbocharged models, since natural draft is unstable and can be directed in the opposite direction by a strong gust of wind or a draft in the room.

By type of heat transfer:

• Convection. The traditional scheme of heating the coolant in the burner flame without additional procedures was used.
• Condensing. A technique that has appeared relatively recently. The liquid is preheated with the help of thermal energy obtained from the condensation of water vapor from the exhausted smoke. The prepared coolant does not require intensive heating, which reduces gas consumption and softens the operation of the heater and heat exchanger. In sum, this gives high efficiency (up to 108%, although this method of calculation is not correct and is a common marketing ploy), gas savings and an increase in the life of the heat exchanger.

IMPORTANT!

Condensing models are able to fully work only on low-temperature systems. If the working conditions do not allow the use of such modes, the purchase of a condensing boiler will become impractical.

Gas or electric?

The question of the primacy of gas or electric heating has arisen for a long time, but has not yet been unambiguously resolved.

The main argument of gas heating supporters is a threefold (at least) difference in the monthly payment for gas and electricity for the same conditions and areas. However, adherents of electric heating have their own arguments - the price of a gas boiler is about 6 times higher than that of an electric one.

These are only primary costs, repair work will again require the owners of gas equipment to pay big sums. But even here there are some reservations - if a non-volatile gas boiler is used, the amount of expenses is significantly reduced.

It is difficult to say unequivocally which boiler is better. Both types depend on the supply of fuel and electricity. The state of power grids, especially in remote regions, is difficult.

They are overloaded and need to be updated urgently.

Relying on them for such an important issue is risky. In addition, the longer the service life, the more noticeable the difference in costs.

The advantage of gas units becomes indisputable. This allows, with some reservations, to recognize the superiority of gas heating over electric heating.

Device

Single-circuit boilers have a simpler design. The main element is a gas burner combined with a heat exchanger. It heats the coolant, which moves under the influence of the circulation pump.

At the exit from the heat exchanger, the RH is fed either to an adjacent heating device (external boiler), or immediately enters a three-way valve. It mixes the hot coolant with the colder return flow to obtain the RH at the desired temperature.

The prepared liquid is discharged into the heating circuit. The air supply and the creation of thrust are provided by a turbocharger fan.Control over the operation of the boiler units is provided by a system of self-diagnostic sensors that sends signals to the control board.

NOTE!
Faults that occur are displayed on the external panel display using an alphanumeric code.

Conclusion

Buderus gas boilers are a typical example of German quality and attention to detail. The equipment works stably and reliably in the proposed conditions, performs the tasks in full.

For a domestic user, the approach of the company's designers to the operation of installations is somewhat unusual, however, it is typical for all top-level heat engineering devices. Choosing Buderus, the owner gets the opportunity to provide his home with heat, hot water, get complete security and automation of the heating process.

The user only needs the current setting of the operating mode, the boiler will do the rest on its own.