Choosing a Junkers brand gas boiler. About gas double-circuit and single-circuit boilers Bosch Junkers - description, instructions and possible malfunctions Manual for gas boiler Junkers
The requirements for gas heating appliances are high, since devices of this kind are purchased for long-term operation. Junkers brand products have always met the most stringent requirements in this area and rightfully enjoy great success.
Individual gas boilers Junkers are distinguished by the traditional German quality of components, rich lineup, ample opportunities and instill unconditional trust in hundreds of thousands of buyers around the world.
A bit of history
The Junkers company was founded in 1895 for the industrial production of gas appliances for individual consumers. The production was located in the city of Dussau. The name of the company comes from the name of the German industrial engineer Hugo Junkers, a famous 19th century inventor in the field of thermotechnics, who has nearly two hundred inventive patents.
By 1904, the company mastered production gas water heaters and other equipment. Application advanced technologies allowed to develop a gas supply control system depending on the hot water consumption.
In 1932, due to the global crisis, the management of Junkers sold their concern to Bosch, which continued the development of the concern and its industries. New factories were opened, the quality control of products was improved, the development of new technologies continued, for example, the idea of piezo ignition of a flame for speakers was implemented. After 10 years, heating boilers were put into production for surface-mounted... And in 1985, the mass production of gas boilers with an environmentally friendly clean combustion system began. The company produces household gas appliances in which the combustion chamber is closed and there is no need to connect a chimney.
Today "Bosch Thermotechnik" is one of the largest manufacturers of devices gas heating in Europe. 
The product range of the Junkers brand includes gas floor and wall-mounted boilers, solid fuel boilers, columns for heating water.
Additional elements and spare parts for units of this brand are inexpensive and superior in quality to competitors. The company sets a 25-year warranty period for its products.
Let's consider several series of products of this brand.
Junkers Ceraclass
The line of wall-hung boilers is represented by models with Junkers Ceraclass ZS, ZW indexes of various capacities and design features. 
They are intended for installation of heating in apartments or houses that are not very large area, up to 150 square meters.
ZS boilers have one circuit and are intended for space heating only. An external storage tank of the boiler type can be connected to such a boiler.
The ZW boiler, which has 2 circuits, in addition to the heating function, will provide your home with hot water.
The boilers are equipped with a burner, both open and closed type, all models are equipped with an electric auto-ignition, a three-stage pump, sensors for the presence or absence of draft, protected from overheating. It is possible to connect indoor temperature sensors, which will automatically maintain the desired temperature in all rooms. Automatic system electronic control equipped with a liquid crystal display showing the temperature of the heating circuit and the current operating mode.
Instructions for Bosch Junkers Ceraclass heaters:
Boilers Junkers Ceraclass Comfort
This series includes models with the ZWE index of various modifications. These are boilers with two circuits, requiring the installation of a chimney. They are equipped with an electric ignition, a program for diagnosing possible malfunctions. The boilers are equipped with a digital liquid crystal indicator that shows the value of the current temperature, the boiler mode and the presence of errors. Energy-saving water pumps are built into the heaters, automated control and flame control is implemented gas burner and traction, the device is protected from overheating.
Instructions for Bosch Junkers units of this line:
Junkers Ceraclass Excellens
This series is represented by heating units with ZSC, ZWC indexes. Their capacity allows heating large premises. They can be connected in chains and further increase the heating area. Individual gas boilers Junkers Ceraclass Excellence is designed to connect to the smart home. They allow separate temperature control in different circuits, for example in warm floors and radiators. They can be controlled remotely via the Internet. Security is supported by 9 special sensors that report all failures, errors and malfunctions.
Heat exchangers of Junkers gas boilers of this series are made entirely of copper material, which increases heat transfer and reliability of the device. This part of the boiler contains more special plates than the competition, so the water heats up more efficiently. Modern system recirculation provides the ability to instantly obtain hot water in any tap, regardless of the distance to the boiler.
Instructions for Bosch Junkers of these models:
Condensing boilers
They include the Junkers brands Cerapur Smart, Cerapur Comfort, Cerapur ACU, Cerasmart Modul - condensing gas boilers of various capacities, wall-mounted or floor-standing.
Boilers of this series are equipped with three-stage pumps, the ability to regulate the heating of hot water and the intensity of heating, an indicator of malfunctions and malfunctions automatic system management. The device with the index ZW23 contains a stainless steel heat exchanger, which allows for high performance when heating water. A well-designed body design makes it possible to harmoniously place the boiler in the kitchen. The device is equipped with an electronically controlled burner ignition and a fault diagnosis system. Additional connection of a room temperature sensor is possible. Boilers with the ZW index perform the functions of heating and hot water supply, and ZS - only heating.
Junkers Eurostar
Boilers of this model are wall-mounted, with a two-stage pump, regulators of heating intensity and water heating temperature. An auto-electronic program for control and digital diagnostics of malfunctions is mandatory. Comfort mode minimizes water heating time. The boiler can operate in two modes of hot water supply - economical or comfortable. Devices with index ZWE - heating and hot water supply, ZSE - heating.
EuroMaxx
These gas boilers are equipped with a circulation pump, they have taps for feeding the heating circuit, and a water flow limiter is built in. It is possible to select the required water heating temperature and heating intensity. Automation controls the flame, the pressure in the heating circuit. Boilers of the EuroMaxx series are protected against frost, have control reverse thrust... They are controlled by the multifunctional Bosch Heatronic system.
Do you need repairs?
The main malfunction of Bosch Junkers boilers is the failure of the control module. The boards in these devices are quite capricious. It is quite difficult to repair them and often you have to purchase a new one, which is extremely costly.
To protect yourself from such problems, it is necessary to install a boiler voltage stabilizer, an insulating sleeve for gas and grounding.
In addition, there may be problems with starting, when after the electric ignition has been triggered, the flame burns for 3-5 seconds, then goes out and so on several times. If the flame ignites, then it is not as stable as usual. The boiler body heats up strongly, and the water temperature does not rise above 45 C. Such a malfunction can be eliminated by high-quality cleaning of the combustion chamber and burner. After that, the malfunction usually disappears and the boiler works normally.
This entry was posted on 11/05/2014 by the author.The Junkers boiler is susceptible to malfunctions in the same way as other equipment. The manufacturer has simplified the search for the cause of the problem by developing a self-diagnosis system. Any malfunction is indicated on the display by an error code. You just have to find out the meaning of the code, and then either repair the equipment, or call the master to your house.
The device and operation of gas boilers Junkers
Boilers brand Junkers are presented in two versions: classic and condensing.
The series of classic units include Ceraclass Comfort, Ceraclass Exellence, Junkers Euroline. These are single-circuit and double-circuit wall-mounted models. Open and closed chambers can be connected to the main chimney or exhaust gases through an opening in the wall.
The design is equipped with a copper heat exchanger and a circulation pump that pumps liquid into the heating system. There is also a plate radiator for heating water.
Cerapur Smart, Comfort, ACU are condensing boilers... This system provides an economical fuel consumption thanks to the use of steam. Wall-mounted and floor-standing devices are equipped with condensate collectors. The principle of the system is shown in the picture:
The combustion products are removed through coaxial chimney... Some models have a remote control.
Fault codes
You can find an explanation of the meanings in the instructions and our table.
| Error code (LED indicator flashes) | Meaning | Remedies |
| Junkers Euroline | ||
| 45 (alternating glow of diode 90). | Poor cravings. | For closed models:
For atmospheric cameras:
|
| 60 | Electronic module defective. | The ignition resistor or other component may have burned out. Electronic diagnostics required. |
| 75 | Damage to the main module. | Damage to the ignition circuit, ionization. The moisture on the board is removed by drying the element. |
| 90 | Temperature limiter problems. | Checking and replacing:
|
| Junkers Eurostar, Junkers Ceraclass | ||
| AA | Serving temperature in heating system exceeds the norm. Low water flow. | What to do:
|
| A4 | Poor removal of combustion products. | Something interferes with the exhaust of gases from the chamber, clean the system. |
| A7 | Damage to the hot water temperature sensor. | Check the details, its contacts and put a new element if necessary. |
| A8 | The controller has been disconnected. | Replacing the regulator. |
| A9 | Temperature sensor incorrectly installed. | Install the sensor correctly. |
| Ad | There is no connection with the boiler temperature sensor. | Inspection of contacts, connections, wiring. Diagnostics of sensors. |
| C4 | Broken pressure switch. | Inspection of the switch, wiring, tube integrity is performed. |
| C6 | Fan breakage. | The fan in closed chambers is responsible for the removal and delivery of air. It is necessary to find out the cause of the breakdown and carry out repairs. |
| SS | Communication with an external thermometer is not detected. | Tighten the contacts, make sure the wiring is intact and the thermometer is working. |
| CE | The pressure in the heating system has dropped. | Measure readings and add water as needed. |
| CF | Pressure sensor triggered. | Similar actions of the CE. |
| E2 | The sensor for the supply water temperature is damaged. | Make sure the wires are intact and the contacts are short-circuited. |
| Error E9 | Heat exchanger or flue gas thermostat tripped. | Inspection in progress:
Chimney shaft cleaning. |
| EA | The flame in the burner is not detected. |
|
| F1 | ||
| F7 | The device is off, but the flame is detected. | System restart. |
| FA | The gas is turned off, but the system indicates the presence of a flame. | Actions are the same as F7. |
| Fd | The Reset key was accidentally pressed. | Click again. |
| Junkers with S4962 board | ||
| E01 / E02 | The boiler does not recognize a flame; an indication of its presence when the fuel is shut off. | |
| E03 | Overheat. | The contacts with the overheating sensor have broken. Diagnostics of elements. |
| E04 | The pressure switch circuit closed before ignition. | |
| E05 | The pressure switch does not work. The fan does not rotate. | Checking the circuit, fan and pressure switch. |
| E06 | The air sensor circuit does not close within 5 attempts of ignition. | Proceed in accordance with E05. |
| E07 | The fan protection has been activated. | |
| E08 | Incorrect operation of the ionization circuit. | Diagnostics and repair. |
| E09 | Incorrect operation of the GK scheme. | |
| E10 | EEPROM memory error. | Installing a new module. |
| E30 (wiring violation); E31; E32 | NTC CH heating thermostat. | Checking and repairing chains. |
| DHW sensor NTC DHW. | ||
| Flue gas sensor NTC Flue. | ||
| E33 | Overheating in the heating part. | Descaling the heat exchanger, adjusting the temperature on the panel. |
| E34 / E35 | Insufficient voltage in the network. | Wait for the flow to recover. |
| E37 | Overheating of combustion products. | Inspect the sensor, the patency of the outlet paths. |
To avoid premature breakdowns, experts recommend:
- Carry out boiler maintenance at least once a year;
- Install water purification filters;
- Clean units from dust, soot, scale;
- Control the patency of the ways for the removal of combustion products;
- Do not set the heating temperature above 60 degrees.
Be mindful of your technique. Do not delay the repair: if you notice signs of a problem, try to fix it. Or contact service center.
Junkers boilers - specialists answer questions
Question: The pressure gauge does not work on my Junkers boiler - what could be? The boiler is new. I replaced the pressure gauge - the result is the same.
Answer: The channel is clogged, the manometer connection point, no water enters the capillary tube.
Question: The Junkers Euroline 23 boiler stopped switching on stably. It turned out that the gas supply valve did not open. The reason is insufficient opening voltage. It was 35-37c, 60c needed. Replacing the electronic board resolved the issue. Is there an electronic circuit for this board? On a new board, 50 kOhm. The rest of the diodes and transistors (without soldering from the board) give the same readings, i.e. can be considered as workers. Could this decreasing resistor affect the voltage drop?
Answer: The resistor can hardly influence, but the coil control transistor can.
Question: A couple of weeks ago, an incomprehensible and unpleasant sound suddenly appeared in the boiler: the impression is that a ratchet works in some kind of "organ" of the boiler. It is impossible to determine by ear. But when you touch the gas valve, you can clearly feel the sound from there. Although it is possible, sound vibrations are transmitted through the boiler fittings. The sound occurs periodically, regardless of whether only the boiler or DHW is working with it. Can anyone have similar problems with such symptoms?
Answer: It is necessary to thoroughly clean the pump, if you are not confident in your abilities, invite a specialist, the part is expensive.
Question: Problem: DHW heating does not work indirectly, heating is in working order! I just stopped heating and that's it!
Answer: Check the DHW flow sensor
Question: Boiler Junkers zs 23-1 ae is a single-circuit boiler with the possibility of heating hot water in a DHW cylinder! The sensor is connected, it does not show an error. Doesn't heat water. When restarting, the yellow indicator blinks twice, the first on the temperature display panel, and the boiler goes into standby mode. When the temperature sensor contact is disconnected, the boiler ignites and immediately goes out. Heating works without interruption. DHW heating was working.
Answer: It is necessary to check the boiler sensor.
Question: Tell me, the water does not pass through the boiler to the hot water supply, where to look?
Answer: If you have a Junkers Euroline, then at the entrance cold water into the boiler.
Question: Help with this question. Junkers Evroline zw 23 did a great job for one season and strange things started happening in this one. After using cold water closing the tap, the boiler turns on for 5-10 seconds and goes out. The heating circuit works fine. The service technician said it was a hydraulics problem. This begs the question, why did it work normally before and how to fix it?
Answer: Eliminate? Remove water hammer in the cold water pipe at the boiler inlet when it is closed on the mixer - for example, put a check valve.
Question: Boiler Junkers Euroline ZS / ZW 23-1 AE. Stable, once a year, I have a problem with hot water supply. The fact is that when you open the tap to supply hot water, it (water) flows warm, not hot, but at the same time, the batteries get very hot. I call the foreman and he cleans the valve, which, in his opinion, is clogged with tap water. I downloaded the instructions for the boiler, but it does not say anything about the procedure for cleaning the valve, so I ask for your advice. To clean the valve, it is necessary to completely dismantle the entire assembly, or can this be done without removing it? Maybe there is at least short description a similar procedure?
Answer: The 3-way valve can be removed quite easily, after draining the heating water from the boiler, try replacing it if you are tired of repairing it.
Question: There was a problem with the Junkers ZW-23-1 KE 23 boiler worked fine, and this winter it all started. At first, the boiler could not turn on normally, turn on and off + turn on and off + turn on and off and so for 20-30 minutes it could do as if it did not have enough gas to ignite. DHW was working fine at this point. The serviceman can offer nothing but cleaning the boiler, but I say to him, in my opinion, the matter is in the gas part, the boiler is serviced 2 times a year. And yesterday the column started to drive - it turns on there is a frantic noise of gas and after 5 seconds it turns off and cannot turn on normally. It will take some time, then it will work. Tell me where to start?
Answer: clean or replace the ionization electrode. Perhaps the problem is in the board, the board does not see the minimum flame, check the capacitor C4 in the boiler.
Question: The Junkers Evroline zw 23 ke boiler heating is working normally, when the hot water tap is opened, there is a strong (noisy) gas combustion - then the burner turns off-on again. etc. With a slow opening, it seems in the mode, but if you open the tap somewhere else, everything repeats. The heat exchanger has just been cleaned.
Answer: Check the gas valve settings according to the instructions.
Question: I have a Junkers boiler zw 23 ke 12. There is a problem for a month now. Turn on hot water, the boiler begins to make noise and a sound begins in the pipes, as if they are being hit with a hammer and the water does not heat up. The fault reset key flashes about once every 4 seconds, but the temperature shows either 90 or 45. What could be the problem?
Answer: If the pressure in the boiler is correct and the pump has not jammed, the heat exchangers will definitely be flushed. Also check the air vent and volume compensator.
Question: Junkers Euroline ZW23KE boiler (installed 10 years ago). After a thunderstorm, flashes red and green 75. What could be? The board refused?
Answer: See flame control circuit.
Question: Boiler Junkers Euroline 23-1. Turbine. An error of the following form: The fault reset button is flashing, and the diodes are at 45 and 90 degrees. According to the instructions - the pressure sensor does not work. If I understand correctly the pressure sensor is it the same pressure switch? I tried to reset the error through CUT, but the result is the same. I removed the case, blew the venturi tube, blew it into the pressure switch too, maybe the contacts somehow got stuck, they jiggled normally. Then, through the reset button, he removed the error and the boiler started up. But after half an hour, the picture is again the same. Tell me what it can be and how to check it. Maybe for resistance or whatever ... (there is a multimeter). Or is it a matter of the board. Or buy a new pressure switch?
Answer: 1 - check the moment of the accident - if the turbine is working, 2 - if it works, then check the voltage on the pressure switch with a tester.
Question: The pressure sensor stopped responding, unscrewed it, blew it out with water pressure - it works, put it back in place, filled it with water does not show. I unscrewed the sensor, when the system is filled with water, there is no water in the place where the sensor is connected, I fill it, the bypass is activated, and there is no water at the junction of the sensor, I unscrewed the plug located below, blew everything clean. What needs to be done for water to flow into the sensor?
Answer: Clean it up.
Question: Such a problem - the Junkers Euroline zw-23 KE 23 \ 21 DHW boiler works normally, after turning on the boiler for heating it works for an hour or half an hour and turns off, after 3-4 hours it turns on itself and again the same story. Once, when I opened the tap for adding cold water to the system, the boiler began to work, after turning off the tap it immediately turned off. please tell me what could be the reason.
Answer: you need to check everything, I would start with an NTC sensor.
Question: I have a Junkers Euroline boiler. In operation, it worked fine for 5 years, but recent times it starts badly on heating, there is an arson, a flash of gas and immediately goes out, then after 10-12 seconds everything repeats and so on 6-10 times until it starts. It seems that it does not open gas valve... Tell me what you need to do to fix this?
Answer: Clean the ionization electrode and possibly repair the board.
Question: Tell me who has come across this: when hot water is started, the boiler lights up, but after 1-10 minutes it turns off and the first light blinks. Then the boiler can be started only after disconnecting the power supply for a couple of minutes. What could it be??
Answer: NTC flow line or pump.
Question: There is a Junkers Euroline ZW-23-1-AE turbocharged boiler. The turbine is working very loudly. When inspecting the turbine, I found a fairly large anchor play (1.5-2mm). The inner bearing rotates with a slight extraneous sound, but the loud sound comes from the backlash. The reason for the appearance of backlash, I thought, was the shift of the inner bearing along the axis of the armature. But it is fitted very tightly, and slight (so as not to damage the bearing) attempts to move it along the axis did not lead to anything.
In this regard, the questions:
1. In general, is it possible to change the inner bearing of a turbine or is it not practiced by anyone?
2. In the case of replacing the turbine, can you put in a less powerful one so that it does not buzz so much? I have a 50W turbine, maybe there are 25-30 watt turbines. The heated area is about 60m, the boiler always operates at minimum output.
Answer: The backlash is not from the sound of the turbine! If you can - Change the bearing.
Question: Turbocharged boiler Junkers Euroline. Heating works out decently, but the hot water supply is playing pranks. In the draw-off mode, it heats both hot water and heating. Replaced the 3-way valve insert with a new one. The drive operates DHW heating. I washed the secondary heat exchanger on the heating side - there was debris, but not critical. I removed the 3-way drive, pressed the stem all the way down - the result is the same, both hot water supply and heating are working. Give advice.
Answer: Incorrectly assembled three-way valve, debris.
Question: Good day, everyone. I have a Junkers Evroline ZW23KE boiler installed. Now the following problem has appeared: on heating, the burner works in medium mode, and with hot water supply (the temperature regulator is in a higher than medium position), the maximum flame immediately turns on, the heat exchanger starts making noise like a kettle before boiling. The temperature on the indicators reaches 90 and the gas supply is turned off. The temperature was lowered by the flow of water - the gas turns on and everything starts from the beginning. If the DHW regulator is in a position less than average, the maximum flame turns on, then the flame decreases to medium and then it works with a constant flame change (either increase, then decrease). I suspect it's time to clean the plate heat exchanger. For 8 years of operation, I have never cleaned it. But since not completely sure of my conclusions, so I decided to consult with you. Have I identified the problem correctly?
Answer: And the primary heat exchanger also needs to be cleaned.
Question: Junkers Euroline. The pressure switch does not work. Pull with your mouth - it works. The turbine is spinning, but there are no discharges on the tubes ... The exhaust pipe is in order. Not crammed anywhere. Has the turbine started to blow weakly?
Answer: Replace or blow out the venturi, adjust the pressure switch.
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OPERATION AND REPAIR OF BOILERS2017-06-03 Evgeny Fomenko
The device and principle of operation of Junkers boilers
Classic gas boilers
Junkers has produced several series of gas boilers with classic device: Ceraclass, Ceraclass Comfort, Ceraclass Exellens and Junkers Euroline. Among them there are models with one and two circuits, as well as with closed and open type... The devices can operate both on natural gas from a centralized gas pipeline, and on liquefied gas from cylinders.
They are compact and wall-mounted. At the bottom of the column housing there is a Heatronic control panel with knobs for adjusting the temperature of the coolant and hot water supply, setting buttons, a pressure gauge and a multifunctional display. In Ceraclass Comfort models, the electronics are covered by a lid at the top.
Devices with closed cells combustion is additionally equipped with fans in the upper part for forced removal of combustion products and air supply to the furnace. In the center of the boiler there is a burner with an ignition electrode and ionisation flame monitoring.
Above it is a heat exchanger made of copper or stainless steel. On the right, just below, is located circulation pump, ensuring the movement of the coolant through the radiator system. A second plate heat exchanger is installed in the two-circuit devices, which provides heating of water for domestic needs.
Condensing gas boilers
Condensing boilers are presented in the Ceraput Smart, Comfort, ACU and Modul series. There are both floor-standing and wall-mounted configurations. They are more economical than the classic ones due to the use of heat from the condensation of steam from the combustion products.
Additional elements of such devices are condensate collectors located in the lower left part of the housing. A coaxial chimney comes out from above, along the central part of which cooled combustion products go out into the street, and through the external oxygen into the furnace.
All Junkers boilers are equipped with the necessary safety devices. Modern models can connect to the system " Smart House»And be controlled remotely. Consider which Junkers gas boiler shows error codes and what to do to correct these faults.
Major error codes
45
Error 45 can flash alternately with 90. This is an indicator of insufficient thrust. On turbocharged models, check that the fan and differential pressure switch are working properly. In atmospheric boilers, the draft in the chimney and the serviceability of the draft control sensor are checked.
60
Error 60 appears when the control board malfunctions. One of the reasons may be the burning of the resistor next to the ignition transformer. If you are not well versed in the electronic part, it is advisable to contact the service department.
Junkers boiler control board
75
Error 75 indicates a malfunction in the electronic board. Most likely the problem is in the circuits tied to ignition and combustion control. You may need to completely replace the control board.
90
Error 90 flashes every four seconds when there is low pressure in the network. The electronic control board may be defective. If you have problems with electricity throughout the room, buying a voltage stabilizer will help.
A4
Error A4 is displayed when the flue gas outlet is detected on the flow fuse. Check what may be obstructing the flue gas discharge.
aa
Error aa appears when the flow temperature in the heating system is exceeded and when there is insufficient water flow for the set power level. It is necessary to check the presence of lime deposits on the plate heat exchanger and in the combustion chamber, to inspect whether the pump is working. Also, the cause of the breakdown may be a malfunction of the NTC sensor.
e2
Error e2 indicates that the flow temperature sensor is damaged. It is necessary to inspect the sensor and its connection wires.
temperature sensor
e9
Error e9 is output if the flow temperature limiter is activated. View system pressure, temperature sensor, pump and control board operation. Purging the system can also help.
ea
Error ea means that no flame is detected in the burner. Check the gas flow into the column and its pressure, the serviceability of the gas flow control relay. The cause of the breakdown may be a clogged heat exchanger, a clogged drain of the condensation siphon. The flame may not ignite due to the lack of draft - inspect and, if necessary, clean the chimney, ensure the flow of air into the room.
c4
Error c4 means the differential pressure switch cannot open at rest. Inspect the switch, the cable that connects it and the condition of the flexible connecting pipes.
c6
Error c6 is displayed if the fan stops working. Check the operation of the fan and the integrity of the connecting wires and plug. Replace damaged parts if necessary.
Other malfunctions
First of all, you need to familiarize yourself with the safety rules when using gas boiler... If you smell gas, immediately turn off the device, close the gas valve and open the window for ventilation. After that, the gas service is called for troubleshooting. 
In order for you to be able to contact the service center, entrust the installation and initial configuration to specialists. Perform regularly Maintenance device, this will extend its service life and prevent possible damage.
Gas heating equipment is bought and installed for many years, therefore, the requirements for reliability, durability and fault tolerance by consumers are very high. The equipment of the German concern Junkers meets the most stringent criteria and enjoys a deservedly good reputation all over the world.
Junkers water heaters are floor-standing and wall-mounted, specially designed for use in Russian conditions. The plant produces economical boilers power from 14 to 42 kW, suitable for heating a house of any size. Each series contains models of both economy class and premium, the price of which is determined by the configuration and advanced functionality. A full two-year warranty applies to all devices. The boilers are compact and easy to install, and the delivery set includes all the necessary parts to connect the device as quickly as possible.
Wall-mounted boilers of the Ceraclass series, with a capacity of up to 14 kW, allow you to heat apartments and houses with an area of up to 150 sq. Single-circuit boilers ZS provide only heating of the house, economically using gas. It is possible to connect a boiler to single-circuit boilers. In addition to heating, the ZW double-circuit boiler heats up 12 liters of water per minute for the kitchen and bathroom.
The series includes boilers with open and closed burners, all models are equipped with electric ignition, a three-stage pump, draft and overheating sensors. It is possible to connect a room thermostat to the boilers, which will allow maintaining the desired temperature in each room. An electronic system and an LCD display informing about the temperature of the heating medium, malfunctions and operating mode make it easier to control the boiler. V automatic mode self-diagnosis is enabled and a fault log is kept.
Ceraclass Smart - the golden mean
Models ZSA 24-2 K and ZWA 24-2 K with a capacity of 24 kW are designed for an area of up to 280 square meters, and the second of them produces about 12 liters of water at a temperature of 40-60 degrees per minute. They use all the same functions as in the Ceraclass boilers.
These units are among the quietest on the market thanks to the right combination hydraulic system and boiler dimensions. As in other series, it is possible to use antifreeze in Ceraclass Smart boilers to prevent freezing of the system.
Ceraclass Excellence - solutions for luxury living
Power from 24 to 28 kW allows you to heat houses of a large area, and the ability to connect boilers into automatically controlled cascades allows you to further expand this territory. Ceraclass Excellence boilers are easily integrated into the system " smart home", They can be connected to external weather sensors, separately regulate the temperature of underfloor heating and radiators, controlling by phone or via the Internet, and electricity can be supplied to it from solar panels... The state of the system is monitored by 9 standard security sensors, informing the owner about all violations, which are automatically recorded in the log.
The heat exchanger of Ceraclass Excellence boilers is made entirely of copper, which increases the heating rate and reliability of the device as a whole. The heat exchanger is one of the largest on the market, 18 plates, against 14 from other manufacturers, thanks to which the water is heated more efficiently. The recirculation function, unique for domestic boilers, allows hot water to be obtained immediately after opening the tap, even at the point farthest from the stake.
Floor standing boilers
Junkers floor standing boilers are marked К ХХ-8Е, where ХХ stands for heat output... They are used in cases where it is impossible to fix it on the wall due to its fragility. All boilers are equipped with a high-quality cast-iron exchanger, a burner for any type of gas, an automatic machine with a malfunction indicator and draft control. The efficiency of these boilers is about 92% at a flow rate natural gas from 3.3 to 6.6 m3 / h. The volume of water in boilers of this series is from 12 to 19 liters. The safety device automatically limits the heating, the maximum limit of which is 90 degrees. The boiler has a built-in thermometer and temperature regulator.
Since the end of 2012, boilers under the Junkers brand have ceased to be produced. But buyers shouldn't worry - high quality still available, now under the Bosh brand.
