Wall-mounted gas boiler Buderus Logamax u072 24k: technical specifications + setup and maintenance instructions

Autonomous heating and hot water preparation systems are becoming common and commonplace in our country.

There is a wide range of heating systems on sale, the most efficient of which are gas boilers.

European manufacturers are recognized leaders in the production of heating equipment.

] Buderus[/anchor], which will soon celebrate its 300th anniversary, is world famous.

Let's consider one of the most popular models of wall-mounted gas boilers from this company.

Gas boiler Buderus Logamax u072 24k

The Buderus company, founded in 1731, is currently part of a holding with the world-famous Bosh concern.

This significantly increased the capabilities and increased the production capacity of the company . Gas boilers are just one of the various activities of a company that produces a wide range of equipment.

The company entered the Russian market relatively recently - in 2004. A plant was built in Engels that assembles gas boilers from branded components. This allows for cost reduction, which is ultimately reflected in the price for the end user.

The Buderus Logamax u072 model line is represented by 4 power options, optimal for use in private homes or apartments.

The 24 kW model is the most popular. It has the optimal combination of technical characteristics and price, suitable for use in various modes or conditions.

Connecting a wall-mounted boiler to the electrical network

Most modern wall-mounted gas boilers are equipped with sophisticated automation. It controls many processes, turning the heating boiler into an autonomous mini-boiler room, the operation of which requires virtually no intervention from the owner. Obviously, the control unit and various sensors require an electrical connection.

Double-circuit wall-mounted boilers are available in two versions: with a conventional socket and with a cable for connecting directly to the machine. In any case, they must be powered from the mains through an individual machine. If you purchased a model with a plug, then the individual socket for the gas boiler should be located next to it, but in no case under it. This is one of the safety requirements so that in the event of a coolant leak, a short circuit does not occur.

Photo 3: Installing a voltage stabilizer for a wall-mounted boiler

A gas boiler requires mandatory grounding. For these purposes, you can purchase a point grounding kit. It is installed in the basement or next to the house and occupies a small area of ​​​​about 0.25 m².

Boiler automation is very sensitive to the quality of the supply voltage. If the level of the sinusoid at the input is insufficient or the shape is not ideal, the devices quickly fail. To prevent frequent breakdowns and extend the service life of the unit, it is necessary to connect voltage stabilizers for gas boilers. To avoid shutdowns of heating equipment in the event of power outages, you should additionally purchase an uninterruptible power supply.

What functions does it have?

Wall-mounted boilers Buderus Logamax u072 24k are double-circuit models of gas units.

They are capable of simultaneously heating the house (preparing coolant for the heating circuit) and preparing hot water for domestic needs. The letter “K” in the boiler marking means “Combined”, i.e. double-circuit.

The range of boiler functions is quite wide:

• The ability to independently detect problems using a self-diagnosis system.
• There is protection against freezing of the system.
• All models are adapted to Russian technological conditions.
• The electronic ignition function makes using the boiler much more convenient.
• The flame is constantly monitored; if it disappears, the boiler operation is immediately blocked.
• When installing additional devices, it is possible to control the operation of the boiler via a smartphone.

The functionality of boilers is abundant; according to some owners, it is even somewhat redundant.

All capabilities are implemented through a control board, the operation of which is similar to the actions of the brain of a living organism.

A system of sensors distributed across all units of the unit constantly monitors the operation and immediately signals the occurrence of malfunctions, failures or breakdowns.

IMPORTANT!

Buderus Logamax u072 24k boilers are sensitive to power fluctuations, which can cause the control board to malfunction and cause a series of errors. To eliminate this possibility, you should use a voltage stabilizer that ensures that the power supply remains constant.

Peculiarities

The Buderus Logamax U072-24K model has the following overall dimensions - 400x700x299 mm (WxHxD), and the weight is 31 kg. Installation is carried out on the wall, which saves space in the room.

To obtain the declared power of 24 kW, the pressure of natural gas must be at the level of 10.5-16 mbar, and the permissible pressure of liquefied gas is 35 mbar; when these parameters decrease, the thermal power will also drop. ExpertKotel.ru reminds that most often in domestic networks the pressure is 12-20 mbar. The efficiency of the heater, with the indicated values, is declared at an excellent level and equals 92%.

Basic parameters and operating principle. The convection type of device involves the generation of heat by combustion of gas, while the boiler operates on natural gas (methane, consumption 2.8 cubic meters per hour) and liquefied gas (propane-butane mixture, consumption 2 kg/hour).

Heating of water and coolant in pipes. This boiler is capable of producing 11.4 l/min of hot water (t=30°C). The coolant temperature is 40-82°C, and in the hot water supply circuit - 35-60°C.

Primary heat exchanger. In the case of Buderus Logamax U072-24K, copper is used, its advantages are good heat dissipation, compactness, low weight, and most importantly, corrosion resistance.

A circulation pump is necessary for circulating coolant (water, antifreeze) through the heating circuit; it is a mandatory component of a closed-type heating system; in our case, the pump is included in the kit.

The expansion tank compensates for the expansion of the coolant in the pipes during heating and releases it back into the system when cooling. This makes it possible to maintain constant pressure in the circuit.

Fuel economy

Automatic ignition (Electric ignition) allows Buderus Logamax U072-24K to start and extinguish the burner according to an algorithm when necessary, which saves fuel.

Modulation of the burner flame makes it possible to smoothly change the intensity of the fuel supply and reduce/increase the flame, this allows you to reduce gas consumption.

Gas consumptionValueNatural Liquefied

Management and control

The gas boiler "Buderus Logamax U072-24K" is electronically controlled, equipped with a display and has a port for connecting additional devices (usually thermostats, programmers, remote controls, etc.). The advantage of the electronic system is that it does not require the constant presence of a person and can significantly save fuel (as described above), the disadvantage is that it is more complex than a mechanical one and depends on voltage drops in the network (it can fail during surges).

Thermometer and pressure gauge. A thermometer is necessary to monitor the temperature of the coolant in the boiler, and a pressure gauge shows the pressure of the coolant; this is an important parameter, because exceeding it can lead to breakdown of individual parts or the system as a whole.

Protection systems

Gas control is a useful and necessary function of the burner; if the flame goes out for any reason, it stops the gas supply automatically.

Air vent. An important element of the safety group, when the pressure in the heating system increases, the air vent automatically releases excess air, usually working together with a safety valve.

The Buderus Logamax U072-24K safety valve stabilizes the water pressure in the circuit when an unsafe limit is reached.

Protection against pump blocking is activated when the boiler installation is idle for a long time; in this case, the pump turns on for a while and turns itself off. This is useful in the summer when the heating circuit is not in demand.

Protection against freezing of the coolant automatically turns on the burner for a short time, provided that the water temperature drops to a critical level and there is a risk of heating defrosting. ExpertKotel.ru reminds that for this there must be gas and electricity.

Protection against overheating of the coolant will turn off the burner if an abnormal water temperature value is detected.

Connection

• The size for connecting the gas pipe is 3/4″.
• It is possible to connect a separate chimney - 80x80 mm.
• To connect the heating circuit - 3/4″.
• Hot water supply - 1/2″.
• The diameter of the coaxial chimney is 60/100 mm.

To connect the power supply, a single-phase network (220 volts) with a pure sine wave and grounding is required.

Autonomous operation

If a UPS is used, then the Buderus Logamax U072-24K will function even when the electricity is turned off (from the battery, table below). This is useful when you need to prevent defrosting in winter, or simply maintain heat and hot water supply.

Specifications

Let's consider the operational parameters of gas boilers Buderus Logamax u072 24k:

Types of Buderus brand units

TTC "Buderus" are divided into three types: pyrolysis, cast iron and steel. Each has its pros and cons.

Cast iron

The main advantage of boilers equipped with a cast iron heat exchanger is the ability to maintain a high temperature in the chamber - at least 200 ºС. However, they have more weight compared to cast iron, and are characterized by sensitivity to significant temperature fluctuations in the firebox.

Steel

Equipment with steel heat exchangers maintains temperatures up to 200 ºС. TTKs are quite light and more compact. They have an important feature: the design is supplemented with brick to improve heat capacity and prevent fuel burnout.

Pyrolysis steel

In recent years, the demand for pyrolysis TTC has been increasing in Moscow and the region. The main reason is efficiency and ease of use.

Advantages of pyrolysis TTC:

1. Increased burn time helps reduce the number of fuel loads required.
2. The operating time with one filling is extended by 2-3 times, compared to cheap units, due to the reduced consumption of raw materials. Reaches 6 hours in boilers with an upper combustion chamber and 12 hours in boilers with a lower combustion chamber.
3. During the combustion process, a small amount of dry residue is formed, as a result of which the ash box needs to be cleaned less often.

The purchase pays for itself over several seasons of operation, due to low costs for firewood, briquettes and coal. Such savings cannot be achieved when operating classic TTKs running on pellets and other fuels.

Units with a lower combustion chamber of pyrolysis gases are equipped with a pressurization fan. This allows you to optimize combustion in the furnace, increasing the efficiency of the unit and at the same time reducing fuel consumption.

Gas generators are energy dependent. Models of this design usually cost 2 times more than heat generators with an upper combustion chamber for pyrolysis gases.

Advantages and disadvantages of the model

The advantages of Buderus Logamax u072 24k boilers include::

• The ability to simultaneously heat the room and prepare hot water for domestic needs.
• Compact, can be installed in kitchen areas without the need to create a boiler room.
• Relatively low price.
• The closed combustion chamber ensures a safe and stable combustion mode.
• The automation supports the Open Therm protocol, which makes it possible to control the operation of the system through external modules.
• Low noise level.
• The self-diagnosis system immediately informs about problems.

The disadvantages of the units are:

• Dependence on the availability and quality of power supply.
• Some components have low resistance to mechanical stress (feed tap).
• The organization of service is considered unsatisfactory by many users.

NOTE!

Most of the shortcomings of the Buderus Logamax u072 24k boiler can equally be attributed to any models of gas boilers produced by many companies, so they can be considered design features.

Advantages

Heating area

The Logamax U072 boiler model range is presented in modifications of 12, 18, 24, 28 and 34 kW, which allows you to select the optimal power for rooms from 50 to 340 sq.m.

Compactness

The dimensions of the entire model range allow it to be installed in limited spaces, such as a kitchen, bathroom, pantry.

Ready solution

The boiler is equipped with an expansion tank, circulation pump, safety valve, flow sensor, control and safety devices.

Preparing hot water

For models with the “K” index, it is possible to prepare hot water without additional equipment; for models without the “K” index, it is possible to connect an external water heater tank for more comfortable use of hot water

Operational safety

The boiler is unpretentious to voltage fluctuations, resistant to changes in gas pressure, also has a freeze protection function, and the boiler body has additional thermal insulation to protect the boiler walls from overheating

Comfort to use

The boiler has simple and intuitive control, which is carried out using five buttons with operating parameters displayed on an informative LCD display. Additional equipment with room temperature controllers to increase comfort and save gas. Low noise level (≤38 dBA)

Fuel types

During production, the boiler undergoes all necessary tests and is preconfigured to operate on network natural gas with a nominal pressure of 13-16 mbar. If it is necessary to operate on liquefied gas, the boiler should be retrofitted with an appropriate conversion kit to liquefied gas.

Empowerment

Possibility of connecting external On/Off automation or regulators and control systems with the Open-Therm protocol for operation in weather-dependent mode, weekly programming or other mode in accordance with the capabilities of the external control system

Internet control

GSM thermostat ZONT BT-2 for gas boilers Buderus. Controls the modulation of the boiler burner. Maintains the set temperature according to an individual schedule. Monitors the technical condition of equipment. Notifies in case of boiler failure, power outage and deciphers errors. Reduces energy consumption.

Device

Gas boilers of the Logamax u072 series have a design that differs little from the design of most similar units.

The main element is a closed-type gas burner, which heats the coolant in a copper primary heat exchanger . The hot coolant leaving it enters a secondary plate-type heat exchanger, where hot water is prepared.

After this, the OM passes to the mixing unit, where a certain amount of cooled return flow is mixed to obtain the desired temperature. The coolant then leaves the boiler and is directed into the heating circuit. The circulation pump ensures the movement of the OB.

To supply air to the heater and remove smoke, a turbocharger fan is included in the design.

Operation control and mode setting occurs via a control board with an external display, which displays current settings or system messages.

Types

There are different modifications of Buderus wall-mounted boilers.

By number of circuits:

• Single-circuit. They only provide heating of the coolant for the heating circuit.
• Dual-circuit. At the same time, they are capable of preparing domestic hot water and heating the coolant for the heating system.

By type of combustion chamber:

• Atmospheric (open) . The air required for the combustion process is taken directly from the room in which the boiler is installed. Removal of smoke and other combustion products occurs using natural stove-type draft.
• Turbocharged (closed) . The air is taken from outside and enters the boiler through the external pipe of the coaxial chimney. For this purpose, a turbocharging fan is used, which simultaneously ensures smoke removal.

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 thermal energy transfer:

• Convection . A traditional scheme for heating the coolant in a burner flame without additional procedures was used.
• Condensation . A technique that appeared relatively recently. The liquid is preheated using thermal energy obtained by condensing water vapor from the exhaust smoke. The prepared coolant does not require intensive heating, which reduces gas consumption and softens the operating mode of the heating pad and heat exchanger. In total, 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 service life of the heat exchanger.

IMPORTANT!

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

For which rooms is it best suited?

Buderus Logamax u072 24k boilers are designed for use in rooms with a maximum area of ​​240 m2.

This is optimal for private houses, apartments, commercial or public premises, offices.

It can be used in industrial buildings if they do not have a large number of openings or technological hatches that disrupt the heating mode and change the temperature in the room.

Competitors

Table. Comparison with competitors and analogues Photo ModelRatingPrice

Sources

• https://ExpertKotel.ru/cat/buderus/buderus-logamax-u072-24k
• https://expert-dacha.pro/otoplenie/kotly-ot/gazovye-k/proizvoditeli-gaz-k/gk-buderus/logamax-u072-24k.html
• https://www.buderus.com/ru/ru/ocs/logamax-u072-18438058-p/

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How to set it up correctly

Setting the operating mode of the Buderus Logamax u072 24k boiler is done using the controls located on the control panel. The current values ​​are indicated on the display; the user only needs to turn on the setting mode for one or another parameter and set the required temperature of the hot water supply or coolant.

Also, in accordance with external conditions, the boiler switches to summer or winter operating mode (heating circuit is turned off or activated). If an error occurs, you can reset it by pressing and holding the Reset button for 5 seconds.

IMPORTANT!

More complex settings related to gas or water pressure limits are performed by a technician from the service center. Independent intervention in the operation of the system is fraught with failure of important components of the boiler.

BBT Thermotechnik GmbH, D…

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BBT Thermotechnik GmbH, D-35573 Wetzlar

www.heiztechnik.buderus.de [email protected]

Specialized heating company:

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Start-up and operating instructions

Before turning on the boiler for the first time, it is necessary to install it on a wall or ramp (supporting structure), connect all communications and power supplies. These actions are performed only by gas service specialists or authorized technicians from the service center.

Be sure to check gas pipe connections using soapy water . The system is then filled with water, guided by the pressure readings on the display. It should not be brought to the limit; it is enough to provide 0.8 Bar.

When heated, the coolant will expand, causing the pressure to rise and reach its optimal operating value.

The Buderus Logamax u072 24k boiler is started using the “Stand-by” button.

In this case, the display will show the current coolant temperature . When you first start it is set to minimum, so to start working you should set the desired heating mode. The burner and circulation pump will start, and the boiler operation will begin.

Operation of the unit does not require any special actions from the user.

The temperature is adjusted periodically according to weather or climatic conditions.

Once a year you need to call a technician to carry out maintenance; if breakdowns occur, a specialist from the service center is also immediately invited.

Download instructions

Download instructions for the gas boiler Buderus Logamax u072 24k.

Stages of work

The heating boiler piping should be carried out according to the classical scheme in order to avoid the use of complex work.

We mount the collector

Before this work, carefully study the sticker on its body. It should contain information about which line is responsible for the supply of coolant and for the outlet.

A 1.25-inch pipe on the manifold is connected to the boiler, into the pipeline of which a 1-inch diameter pipe is inserted. Those holes that will not be used are closed with plugs.

The mixing (distribution) valve is installed on the supply pipe. It is responsible for regulating temperature. If your home has a heated floor connected to the heating system, then the valve must also be installed in the outlet pipe. With its help, the temperature of the water heated floor will be controlled within the required limits.

The pump, which circulates the coolant, is built into the return line. Its installation is possible in two ways.

1. The first method is a direct connection to the collector.
2. Second, connection to the distribution valve.

At the final stage, pressure and temperature control devices, in-line filters, drain balancing valves, as well as air and safety valves are installed.

Price range

Prices for Buderus Logamax u072 24k boilers in different stores differ markedly and are in the range of 40-50 thousand rubles.

Such a difference is often caused by the fee included in the price for the warranty agreement, logistics surcharges or other reasons . When planning a purchase, you need to check the price with a regional representative of the company so as not to find yourself in a difficult situation.

NOTE!

In addition to the boiler, you will have to purchase additional equipment and elements - a chimney, voltage stabilizer, water filters, etc. These devices are mandatory; they must be purchased and installed immediately, from the first days of the system’s operation.

Classification

To simplify the choice, all brand products are classified according to several criteria. By installation method:

• wall;
• floor

By design:

• single-circuit and double-circuit;
• with closed and open firebox;
• with atmospheric or forced-air burner:
• with cast iron or steel heat exchanger;
• with natural or forced draft.

The power of manufactured devices varies in the range of 7,000-100,000 W.