Buderus logamax u072 instruction manual. Heating systems for country and country houses. Boilers, geysers, water heaters - Repair, service, operation. Recommendations for assembly and installation. Review of double-circuit gas boilers Buderus Logamax U

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Buderus Logamax U072-24K- a double-circuit wall-mounted gas boiler, a modern, compact unit designed specifically for Russian operating conditions. With the help of a built-in plate heat exchanger with a wide modulation range, it will effectively prepare hot water in a volume sufficient for a family of three to four people and is able to heat a room of 110-240 m2.

Thanks to the new automation (OpenTherm protocol), you can easily create a heating and hot water system tailored to your personal needs. Simple, intuitive operation ensures quick setting of the required operating parameters. The updated user interface with an informative LCD display allows you to track all changes in real time.

These devices are not afraid of voltage drops, since the operating range ranges from 165 to 240 V. The units can be operated in systems with water hardness up to 16 ° dGH., The boiler will continue to work even in extreme conditions!

Logamax U072-24K with hot water preparation:

Used for heating and cooking hot water flow method (due to the built-in plate heat exchanger);
Compact dimensions, reduced weight and attractive design;
Simple, intuitive user interface;
Informative LCD display;
The built-in safety system includes: frost protection, anti-blocking of the pump; 3.0 bar safety valve; flame presence sensor; safety temperature limiter and other devices;
Quick installation and commissioning;
The premix burner has a wide modulation range: hot water outlet temperature adjustable from 40 to 60°C;
Convenient service maintenance, the plate heat exchanger can be inspected without removing any blocks - just unscrew the two union nuts;
A membrane expansion tank with a volume of 8 liters is already built into the boiler.

Boiler application:

The wall-mounted heat unit is designed for heating and hot water supply systems. The power of 24 kW is enough to heat a house up to 240 m2. Logamax U072-24K is unpretentious to pressure drops.

Water preparation takes place with the help of a built-in plate heat exchanger. Heating occurs according to the flow principle.

Specifications

Power: 24kW.
Serving temperature: 40-82°C.
Domestic hot water preparation: built-in plate heat exchanger.
Maximum hot water flow: 6-8l/min.
Water temperature: 40-60°C.
Maximum allowable pressure in the DHW circuit: 10 bar.
Maximum pressure in the heating circuit: 3 bar.
Minimum flow pressure: 0.3 bar.
Dimensions (H/W/D): 400/299/700mm.
Weight: 34kg.

Review of double-circuit gas boilers Buderus Logamax U072

Double-circuit gas wall-mounted boilers Buderus Logamax U072 24k/18k are designed for heating and hot water preparation, operating on the flow principle.

Boilers Buderus Logomax U072 24k are equipped with a heating circuit pump and a 3-way valve for connecting an indirect heating boiler.

Equipment for a double-circuit gas wall-mounted boiler Buderus Logamax U072 24k / 18k

Connecting wire.

LCD display.

Automatic ignition of the burner.

Constantly adjustable power.

Full electronic protection according to EN 298 with flame control and solenoid valves.

Three-stage heating circuit pump with automatic air valve.

There is no restriction on the minimum flow of boiler water.

It is possible to connect concentric pipes Ø 60/100 mm or a separate pipe Ø 80 mm for flue gas extraction/combustion air supply.

Adjustable fan.

Temperature controllers for heating and hot water systems.

Flow temperature limiter.

Safety valve, pressure gauge, expansion tank.

Priority activation of the hot water preparation mode.

Fig.1. Dimensions and minimum distances

Fig.2. Design of a double-circuit gas wall-mounted boiler Buderus Logamax U072

1-Expansion vessel, 2-Blower fan, 3-Combustion chamber, 4-Burner, 5-Ignition electrode, 6-Safety valve (heating circuit), 7-Automatic air vent, 8-Boiler circuit pump, 9-Pump speed switch , 10-Gas valve, 11-Pressure gauge, 12-Control box, 13-Power supply, 14-Plate heat exchanger for double-circuit boilers (U072-18K/24K), 15-Name plate, 16-Pressure switch, 17-Ionisation electrode, 18-Flow temperature sensor, 19-Boiler water temperature limiter, 20-Air deflector, 21-Differential pressure switch, 22-Combustion air intake, 23-Flue gas pipe, 24-Hot water temperature sensor (U072-18K /24K), 25-Filter (U072-18K/24K), 26-Flow Meter (Turbine) (U072-18K/24K)

Fig.3. Wiring diagram double-circuit gas wall-mounted boiler Buderus Logamax U072 24/18

1-Differential pressure switch, 2-Blower fan, 3-Flow temperature sensor, 4-Pressure switch, 5-Boiler water temperature limiter, 6-Ionization electrode, 7-Ignition electrode, 8-Gas valve, 9-Temperature sensor connection boiler (U072-18/24), 10-turbine (U072-18K/24K), 11-alarm connection (24 V, max. 40 mA), 12-3-way valve, 13-boiler circuit pump, 14- Hot water temperature sensor, 15-Connecting wire 230 V, 16-Connection OTM or On/Off controller 1), 17-Connection outside temperature sensor, 18-Diagnostic connector, 19-Transformer, 20-Ignition transformer

Boiler installation Buderus Logomax U072 24k

Capacity check expansion tank

The characteristics of the curves are built on the basis of the following parameters:

The initial amount of water in the expansion tank is 1% of the amount of water in the heating system or 20% of the capacity of the expansion tank

The working pressure difference of the safety valve is 0.5 bar

The pre-pressure of the expansion vessel corresponds to the static installation height above the heat exchanger

Maximum operating pressure: < 3 бар

Installation of a double-circuit gas wall-mounted boiler Buderus Logamax U072 24k/18k

Fasten the mounting template, which is in the technical documentation, to the wall, while the lateral distances to obstacles must be at least 100 mm.

Make holes for the hooks according to the mounting template.

If necessary: Make a hole in the wall for the flue gas accessory.

Remove mounting template.

Check the country of destination indicated on the rating plate and the correctness of the type of gas supplied by the gas supply company.

Insert dowels.

Screw in the hooks.

Attach the boiler Buderus Logomax U072 to the wall and hang it on hooks.

Swing the control box down

Loosen the screws.

Pull the control box down.

Tilt the control box down.

Pipeline installation

Connect the gas supply pipe.

All pipe connections must be designed for a pressure of 3 bar, and in the hot water circuit for 10 bar.

Install service cocks and a gas cock or diaphragm valve.

To fill and drain water, install a separate tap at the lowest point of the heating system.

Lay the drain line of the safety valve with corrosion resistant materials (ATV-A 251).

These include: ceramic pipes, PVC pipes, PVC and hard PVC PVC, PE-HD polyethylene pipes high density and polypropylene, ABS/ASA pipes made of ABS/ASA, cast iron pipes, enameled inside or coated, steel pipes With polymer coated, stainless steel pipes, borosilicate glass pipes.

Water supply

Open the valves on the supply and return lines and fill the heating system.

Check for leaks at the connections (maximum test pressure 2.5 barg).

open the faucet cold water on the boiler and a hot water tap at one of the draw-off points and wait until water starts to come out (test pressure max. 10 bar).

gas pipeline

Close the gas cock to protect the gas fitting from high pressure damage.

Check the tightness of the connections (maximum test pressure 150 mbar).

Reduce the pressure in the gas pipeline to the working one.

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OPERATION AND REPAIR OF BOILERS

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Despite the fact that the cost of gas is constantly rising, this type of fuel remains one of the most economical. Its use allows you to reduce heating bills. The main requirement is the condition under which the gas pipeline must pass close to the house. In this case, you will be able to install heater and receive heat at an affordable cost. But, visiting the store, you can get lost in the huge assortment of such devices.

The main thing is that the equipment you purchase meets the basic requirements and does not work for wear. As such a unit, you can consider the Buderus Logamax U072-24K gas boiler, reviews of which you can read below. Before purchasing a particular model, you must be sure that its power corresponds to the area of \u200b\u200bheated premises. Otherwise, you may encounter the fact that the equipment will work for wear or, on the contrary, its power will turn out to be too much. But in the latter case, you will overpay for the model.

Model Description

The above is used for heating water and home heating. This two-circuit unit has a closed combustion chamber, and the body can be easily disassembled for cleaning. The equipment is installed on the wall, but it will work on liquefied and natural gas.

The device has an electronic burner, as well as an ionized electrode that allows you to control the flame. The manufacturer has provided for the presence of a whole system for protecting equipment from freezing. The model is resistant to voltage and pressure drops. The gas boiler of the Buderus Logamax U072-24K brand, reviews of which are quite often the most positive, has a control panel with a display on the body, with which you can monitor the operating status and adjust the heating temperature.

Main characteristics of the model

If you are interested in the Buderus Logamax U072-24K double-circuit boiler, then you should pay attention to the main characteristics, including power, maximum fuel consumption, and water temperature. As for the first parameter, it is equal to 24 kW, while the second parameter is equal to 2.8 m 3 natural gas in an hour. But the temperature of hot water can reach 63 ° C.

Considering the Buderus Logamax U072-24K gas boiler, reviews of which you can read in the article, you should also pay attention to the type of equipment that is traditional, as well as the allowable pressure of natural gas, which is 0.016 bar. The volume of the expansion tank of this device is 8 liters. If the temperature is heated to 50 ° C, then the productivity will be 11.4 liters per minute. It is possible to connect a boiler or water supply, while the diameter of the elements equal to 1/2 will be used. When heating is connected, this parameter is ¾. The power consumption is 150 watts. The equipment weighs only 30 kg, which will allow you to install it yourself.

additional characteristics

If you decide to purchase a Buderus Logamax U072-24K gas boiler, reviews of which would be useful to read before visiting the store, then you should know that the consumed thermal power device is 26.7 kW. The diameter of the coaxial chimney is 60/100 mm. Liquefied gas per hour the device will consume in the amount of 2 kg. But the additional pressure of liquefied gas in bars is 0.035. The heating temperature can vary from 40 to 82 °C.

It should be borne in mind that the performance at 30 ° C will be 6.8 liters per minute. The equipment is powered by 220 V. It is also important to take into account the dimensions of the device, which are 400 x 700 x 299 mm.

Feedback on features and benefits

The gas boiler Buderus Logamax U072-24K, the characteristics of which were mentioned above, according to users, is very manageable. The device has a display and a control panel, with the latter of which you can adjust the temperature, turn the device off and on, and monitor the operating status of the unit. Among the positive features, consumers distinguish:

the presence of a closed combustion chamber;
stability of work at pressure drops of gas;
the presence of frost protection functionality;
electronic ignition.

Other buyers mention that the unit is resistant to voltage drops, and also has a simulated fan. The boiler is well adapted to the conditions of Russia, and also has a flame control function, which is provided by an ionization electrode.

User manual

The Buderus gas boiler is intended for use exclusively in closed systems hot water supply and heating. Any other kind of exploitation is considered as improper use. If the power cord turns out to be damaged, then it should be replaced by entrusting this matter to professionals, or rather, to service specialists. Otherwise, dangerous situations may arise during the operation of the device.

Regular Maintenance and control inspections are a prerequisite for environmentally friendly and safe operation systems. The Buderus gas boiler must be installed in a room that is well ventilated, the air must be supplied regularly. exhaust and supply ventilation in no case should it be blocked or reduced, this applies to openings in walls, windows and doors. It is important to ensure that the requirements for the ventilation system are met during construction works, this may be, for example, the replacement of doors or windows. The air in the room where the equipment is supposed to be installed must not contain chemically aggressive substances and flammable vapors, as well as gases and dust.

It is unacceptable to store flammable and explosive materials such as solvents, gasoline, paper, and paint near the boiler. All substances that can cause corrosion must not be used and stored near the equipment. This should include adhesives and cleaning agents, solvents and other products that contain chlorine.

The Buderus Logamax U072-24K boiler must be operated at normal water pressure in the heating system, which can vary from 1 to 2 bar. If a higher working pressure is required, then you should ask the specialists of the heating company about it. Before filling the system with water, you need to find out where the tap for feeding the system is located. It is usually located at the bottom of the boiler, between the hot water and heating supply connections.

Conclusion

The Buderus Logamax U072-24K, which comes with an instruction manual, must not be filled with cold water. In this case, damage to the boiler may occur. If water is poured into the heating system, then cracks may form on the hot heat exchanger of the equipment due to internal stresses.