Pumps

Why the gas boiler does not heat water. The boiler does not heat water Why the Aton boiler does not heat hot water

If gas boiler does not heat water for hygienic or general technical needs, the problem can be solved by heating the required amount of liquid in a saucepan. Much more problems will arise in winter when the heating system is blocked. With a long absence of hosts, freezing of the system is possible. The subsequent restoration of its performance is associated with significant financial and time costs. To eliminate such negative situations, it is necessary to select and apply a set of effective preventive measures.

Design features of the gas boiler Baksi (baxi), Navien, Ariston

In any case, familiarization with the technique of this class and the features of modern models is useful. This knowledge will help to choose the right equipment, not to make mistakes during operation.

In household boilers Baxi (baxi), Navien and Ariston, gas, diesel and solid fuels are burned to heat water, electric heating elements are used. For a more complete use of the potential of energy resources, heat exchangers are being improved. They make long ducts of complex shape to ensure that the liquid remains in the working area for a long time.

Compactness is the current trend. Manufacturers offer gas boilers with square bodies of relatively small thickness. Some models, due to their aesthetic characteristics, deserve to be placed in a conspicuous place.

The next feature is the introduction of automated control systems. They control the combustion process, change operating modes, taking into account the readings of temperature sensors on the street and in separate rooms. When overheating, the equipment turns off without user intervention.

It is necessary to carefully consider situations when the Baksi gas boiler does not heat water. This happens, for example, when the supply of energy resources is interrupted. It is not difficult to make an appropriate check even without special professional training.

Circulation pumps, valves, other typical components and assemblies rarely fail. Their designs are designed for many years of operation without mandatory maintenance. IN electronic circuits no moving parts at all. Their breakdowns are due to marriage. Subject to the rules established by the manufacturer, the resource of modern gas heating boilers is more than 10 years.

Voltage surges in the power supply network can damage the electrical part of the equipment. To exclude such influences, an external stabilizer is installed. Checking the grounding system will come in handy. This completes the set of preventive measures for this group of problems.

It is much more difficult to provide protection against the most common cause of breakdowns in gas boilers - scale. It is she who will be studied in detail in this article. When heated, calcium and magnesium salts are converted to a solid state. It is these impurities that clog narrow technological holes in heat exchangers. They also form a porous structure on the surface of electrical heating elements. With a significant violation of the normal heat dissipation, their cases are damaged.

To prevent the formation of scale and lime inside the boiler, it is advisable to install non-chemical filters (water converters), magnetic and electromagnetic, which will ensure a long "life" for your boiler and an uninterrupted supply of hot water, as well as protect the heating circuit.

Such filters (scale converters) as AquaShield or MWS are not used in their work. chemical reagents and replacement cartridges. Once you install such a device in front of the boiler, you will forget about the scale problem for many years!

Troubleshooting: why does a gas boiler not heat hot water well?

If the gas boiler does not heat well hot water due to clogging or rupture of the tube in the heat exchanger, repair is necessary. It is performed by replacing a failed node. Threaded connections are not used in this case, so it will be difficult to independently disassemble and subsequent installation. To create a high-quality soldering connection, it is better to invite an experienced craftsman. A qualified specialist will provide the necessary level of quality, provide written guarantees.

Knowing about the problem in advance is not easy. The scale layer grows slowly, so it will not be possible to register a clear decrease in power. Extraneous noise can be caused by the passage of sand and other mechanical impurities through the pipes. Technological openings are too small for visual inspection. For its implementation, dismantling is required.

This information explains why these types of emergencies occur unexpectedly. To prevent their development into a more complex problem, boiler equipment can be equipped modern system remote control. Some manufacturers offer turnkey solutions in the form of an additional electronic unit and specialized software.

The corresponding application is downloaded to the smartphone. The advantage is the ability to remotely change settings, check readings temperature sensors. If the Navien gas boiler does not heat hot water due to scale, replacing the heat exchanger is not enough. These same contaminants reduce the inner diameter of the pipes, narrow the ducts in the radiators. A complete system cleanup is required.

This procedure is performed according to the following method:

Drain water into drain.
Rinse all circuits sequentially, or simultaneously with a special solution.
It is also used to clean the heat exchanger, if it is only clogged and can be further operated.
After assembly, the performance of the system is checked under pressure.
Eliminate identified defects (cracks, loose connections).

Aggressive chemical compounds are used to remove calcium solutions. The duration of a standard procedure for one household object is several hours. Appropriate corrections are made taking into account the real state of the system. Strong acids can damage metal parts, solder joints of the Ariston double-circuit boiler. For this reason, experienced teams take repair tools to fulfill orders.

Independent implementation of such procedures is possible. But for many ordinary users, it is not advisable for several reasons:

You have to purchase expensive equipment for pumping liquids that will be used.
Independent selection of the optimal composition of the solution will cause difficulties.
During this procedure, there are no mechanisms for operational control of processes within the pipeline system. This increases the likelihood of breakdowns.
In case of personal performance of operations, an official warranty obligation of a third-party contractor will not be received. All future problems will have to be solved at your own expense.

In addition, it should be noted that careless handling of aggressive chemical compounds can cause harm to health.

Preventive actions

Specialists of enterprises offering flushing recommend doing it every heating season. It is combined with a general inspection of the equipment. The frequency is adjusted taking into account the level of rigidity, the intensity of operation of gas double-circuit boilers Baxi (baxi), and other significant factors.

These tips are really helpful. Regular cleaning will prevent more complex procedures. Simultaneous check will help to identify problems on early stages. However, it is necessary to emphasize the main drawback of this technology - it can damage the equipment itself. It is especially unpleasant if defects appear during the heating season. It will be quite difficult to prove the guilt of the workers who did the cleaning.

Instead of using potentially dangerous techniques, effective protective measures are used. They are based on modern technologies water treatment.

So that scale does not form in the Navien or Ariston heating boiler, they are installed in front of it. They dissolve during the passage of a stream of water, create dense shells around microscopic scale particles (at the first stages of growth). After such a "modification" harmful impurities are not able to join the walls and each other. They pass freely along the contour, are removed into the sewer.

The second method is the replacement of harmful compounds with sodium ions. This procedure is carried out using special resins. They fall asleep in two large containers that work alternately. As contaminants accumulate, flushing is performed using an inexpensive saline regeneration solution. Such equipment is used for general protection of apartments, cottages, and other real estate objects.

The next reason why a gas boiler does not heat hot water and its solution is protective technology, which appeared recently, although it has been known for more than a hundred years. The fact is that previously only permanent magnets. They lose their beneficial features with time. Moreover, the effect of "addiction" was experimentally found, when calcium and sodium compounds cease to respond to the corresponding influences.

Today, the technique has been improved! Today, electromagnetic converters with high-frequency oscillation generators are used. With minimal energy consumption (5-20 W per hour), they operate at a distance of up to 2 km along the length of the pipeline from the installation site of the Baksi or Proterm heating boiler. This technique retains its initial efficiency throughout its entire service life.

Ultrasound can grind scale particles, eliminate old formations. But this technology is rarely used. Like acids, it can destroy the structural components of the water supply system. It should also be noted the probability of occurrence of harmonic oscillations in the sound range.

Membrane technologies provide high level purification from various impurities, including hardness salts. But standard domestic installations process no more than 200 liters. liquids per day. This is not enough for the needs of the Vailant heating boiler and hot water supply.

Features of different boiler cleaning technologies and conclusions

If the gas boiler has stopped heating water, you have to repair it. To extend the life of the Buderus or Ferroli heating boiler and prevent accidents, different methods are used. To choose suitable option you need to pay attention to the following details:

Rinsing with aggressive chemical compounds does not eliminate the problem, but eliminates the scale that has already formed.
Polyphosphates pollute water, so this protection is used only for the heating circuit.
Sodium compounds are harmless (this is ordinary, well-purified edible salt). However, after appropriate treatment, the water will acquire a pronounced taste.
Ion-exchange fillers are sensitive to temperature, humidity, various impurities. It is necessary to clarify the requirements that are set out in the official instructions of the manufacturer of the Navien double-circuit boiler.
To connect electromagnetic transducers, you need a current source of appropriate power. To ensure its continuous operation in difficult conditions, autonomous emergency power circuits are used.

When determining the reason why the Navien gas boiler does not heat or does not heat hot water well, these are 3 protection methods that must be taken into account: water hardness, architectural characteristics of the property.

Individual heating and hot water supply have long ceased to be something unusual. It is convenient and practical, besides, it allows you not to depend on the whims of utilities. Well, if some kind of trouble suddenly happens, for example, it turns out that the boiler does not heat water, then you will have to fix the breakdown on your own.

No, this does not mean that you should equip yourself with a tool and start repairs yourself - for this there are specialized companies that provide such services. If the heating boiler works properly, but does not heat the water, then the specialists will repair it, adjust the boiler in accordance with your wishes, and if necessary, they will do it. All work will be done to a high standard and guaranteed.

Modern gas boilers are reliable and powerful heating devices that also perform the function of heating water. They successfully combine seemingly incompatible things - unsurpassed efficiency and compact size. But their uninterrupted operation is possible only under the condition of regular maintenance, detection and elimination of the slightest malfunctions.

Malfunctions of heating boilers

Basically, major malfunctions begin to appear during the heating season, when two boiler circuits are operating - heating and water heating. It may happen that it does not start at all, or it does not heat well enough. With the launch, the issue will have to be resolved separately, but if it does not heat the water enough, then the reason may be the clogging of the heat exchanger. As you know, the quality of water in our systems is far from ideal, and besides, few users install it in front of the boiler. So the heat exchanger becomes clogged, resulting in poor boiler operation.

Here are the most common malfunctions of gas boilers in the event of which it weakly heats water:

randomly shuts off periodically
smokes heavily,
does not develop enough power,
making noise
clogged
the pump is broken.

If it so happened that the gas boiler does not heat the water, then often the reason is the formation on the walls of the heat exchanger limescale, which, as it accumulates, becomes very durable and not only reduces the temperature of the water, but also reduces the throughput of the boiler. The thermal conductivity of scale is ten times less than metal, so it is not surprising that the boiler does not heat water. If no preventive measures are taken, then very soon the boiler will have to be completely disassembled and deposits removed mechanically.

Only a timely one can help this trouble, and it should be done regularly, especially if cleaning and softening filters are not installed in front of the boiler. For washing, special chemicals, but they should be used with great care, since they are equally damaging to lime deposits and to the material from which the heat exchanger is made. It is best to invite a specialist for this purpose.

For safe and effective work gas boiler, preventive maintenance is recommended. It is advisable to do this regularly before the start of the heating season; you should not wait for the situation when the boiler does not heat water. This approach will ensure its long service life and economical operation. Overhaul is carried out as necessary by an employee of the service center - it is strictly forbidden to do this on your own.

Vaillant boilers are particularly reliable and safe. Breakdowns of such complex equipment must be eliminated by the master. But, minor malfunctions can be removed on your own if you have a basic level of knowledge about the design of heating and heating boilers.

Most faults are indicated on the boiler display. Having a decoding of errors, you can figure out what is the reason for the boiler's failure to heat water. Where to start the search if the heating of water in the Vailant boiler does not work, and the indicator does not show an error, or can it be interpreted in different ways?

Vaillant boiler does not heat hot water due to blockages

This is one of the most common problems. Most often, the reason is the low quality of water - scale appears, nodes, filters and pipes become clogged.

If the flame does not light up in the boiler, start the test with the flow sensor. Finding this cylindrical fixture is quite simple. The flow sensor is located near the pump, it is to it that the wires fit. Two sensors are installed near the pump:

Pressure sensor in the heating system.
flow sensor.

The flow sensor looks like a small fan, it starts to rotate from the movement of water through the pipes. If the flow sensor detects the movement of water, a signal is sent to the automation about the need to turn on the gas and heat the water. If the flow sensor is clogged, water will flow but the fan will not move. Accordingly, the signal to turn on the heating is not received. There are two ways to solve the problem:

Do not rush to disassemble the boiler and try to "purge" the system first. Turn off the main water supply at home. Open the hot water faucet and let the water out of the system. Now the percentage of air in the pipes has increased. Start abruptly opening and closing the water tap directly in front of the boiler. These simple manipulations will help create pressure and clean the flow sensor fan from debris.
If "purging" does not solve the problem, it is necessary to open the boiler, unscrew the flow sensor and clean it manually.

If the Vailant boiler does not heat hot water, the secondary heat exchanger should be checked. It also tends to get dirty quickly. But, fortunately, it is easy to remove, clean and install back.

blockage three-way valve can also cause the boiler to fail to heat water. And you can remove this node yourself, clean it and install it back.

Having bought a Vaillant boiler, be sure to check with the seller information about the places where the filters are installed. You can clean and change these components yourself.

Faulty pump

The heating of water in the Vailant boiler largely depends on the operation of the pump. To repair or replace this unit, you must call a specialist. But, you can independently check whether it is the reason for the boiler's failure to work.

Set the water temperature on the boiler to 0 °C and turn on the water heating mode. At this time, monitor the operation of the pump. If after 20 minutes of operation it does not heat up, then the problem lies in the pump.

The reason for the failure of the boiler to heat water may also lie in the elementary unscrewing of the bolts in the connection areas. Look carefully at the boiler diagram and check that all connections are tight. Perhaps a simple tightening of the bolts will solve your problem.

This video is the solution to your problem!

Watch until the end and you do not need to call a specialist.

Without boilers in the climatic zones of Russia, one cannot survive. And this also applies to the warmest areas, Sochi, Anapa and Rostov-on-Don. Winters are still harsh and people cannot survive without heating. Therefore do without heating systems and hot water is definitely not available. And only boiler houses can provide the city with all this. Today, let's take a look at the reasons why. boiler does not heat water- how to solve this problem and what to do for this......

They are very different. It all depends on the heat source. They can be either steam or water. They may vary in location. If the house itself decided to build its own boiler room, then a specially separate room in the house can be allocated for it. Or they make extensions to the house for these purposes. One of the main requirements for the construction of boiler rooms is good ventilation.

If the boiler works with steam, then very high demands are made on the quality of water purification, and then on steam. Therefore, it will definitely not work out at such boiler houses without a whole complex of purification plants. This includes the AquaShield electromagnetic softeners, which are highly valued by boiler house employees today.

If a gas boiler suddenly stops heating water, the reasons may be different, but most often when using water from a central water supply without softening installations, lime deposits may be the cause. And hard and poorly eliminated. The table shows possible signs reasons for stopping the boiler due to scale.

Other reasons for stopping the boiler are simpler. Maybe a piece of scale can get stuck in the pipe and block normal operation, and a crack in the gas boiler can also contribute to a shutdown. But in these cases, there will definitely not be scale residues on the walls of the equipment. If there are no treatment facilities installed in the boiler room, then the root cause, of course, will be water hardness. If the treatment facilities are standing, and the equipment was checked recently, then most likely this is not the problem.

In any case, if there is no cleaning in the system, then you will have to urgently deal with this cause and solve it. For boiler rooms, there are a number of water softening devices that are suitable:

AquaShield;
Ultrafiltration and conditioning for steam boilers;
Ion exchange for economical consumers of gas boilers

The most wasteful process of purification and softening will be in steam boilers. There will have to remove not just all organic and inorganic impurities. Even dissolved gases will have to be removed. Degassing is quite troublesome and costly. But the operation of the boiler depends on the quality of the steam. This is where membrane softeners work to make the water completely isolated.

AquaShield is chosen by many consumers of gas boilers for the simple reason that it does not need to be looked after and it does not need to be spent on it. But its biggest advantage for boiler equipment has been and remains the ability to remove old lime deposits even in the most difficult places. Usually, to eliminate such residues, the equipment needs to be untwisted, the spare parts are soaked in aggressive acidic environments and kept there for up to two hours. But even after that, you have to clean the surfaces with metal brushes or cleaners. If your gas boiler does not heat water to the desired temperature, then the reason is scale deposits. The electromagnet does all this work without damaging surfaces, at the molecular level.

During the operation of a double-circuit gas boiler, each user will encounter certain problems associated with the operation of the hot water circuit. These problems are inevitable. They always appear, regardless of the manufacturer of the boiler and its heat exchanger, on the design features of the boiler; It doesn't matter if the boiler is wall-mounted or floor-standing. Often the boiler starts to heat hot water poorly or does not heat it at all. Especially when you use multiple points at the same time. Let's talk in this material how to get rid of this problem forever.

In any room where a double-circuit gas boiler is installed, whether it is an apartment, Vacation home or office, there are certainly several places that are water intake points: a washbasin in the toilet, a shower in the bathroom, a sink in the kitchen. All these points are connected to the hot water circuit of the boiler.

What happens when hot water is turned on at one point of intake

Double-circuit boiler put up for maintenance certain temperature in the hot water circuit. When hot water is turned on at one of the points:

for some time, cold water continues to flow from the tap, which stood in the pipe before it was opened,
the heating of the boiler is turned on, while it takes a certain time for it to reach the set temperature,
after a few seconds, heated water enters the pipe and begins to move to the intake point,
a few more seconds are needed for hot water to reach the point of intake,
an additional few seconds are necessary due to the fact that the incoming water seems too hot to the consumer, and he regulates the water supply by the mixer.

Thus, at least a few seconds pass from the moment the hot water tap is opened to the moment the water supply starts at a comfortable temperature. The farther the water intake point is from the boiler, the longer this period of time.

All this time, the user cannot fully use the water and it will be that the boiler does not heat normally hot water. It waits for the moment when water arrives at a comfortable temperature. Meanwhile, water that is not comfortable for the user simply goes down the drain.

Unproductive water consumption can range from a few liters to tens of liters, depending on how far the water intake point is from the boiler.

What happens when hot water is turned on at the same time at two points of intake

The scheme becomes more complicated if, during the use of hot water at one point of intake, it becomes necessary to turn it on at another point, for example: when the shower is turned on in the bathroom, it becomes necessary to wash your hands in the washbasin of the toilet. In this case:

the rate of use of hot water increases sharply, its consumption increases,
there is a weak pressure of hot water;
coming cold water into the cauldron increases,
a drop in the temperature of the boiler heat exchanger leads to the fact that the water temperature at the first point of intake ceases to be comfortable,
a few seconds are needed to turn on the automatic boiler for heating,
a few more seconds to ensure that both users at two points of the fence can use water at a comfortable temperature.

All this time, both users cannot fully use hot water. She comes intermittently. Unproductive consumption of water, uselessly going down the drain, increases dramatically.

What if one of the users turned off the water? In this case, the consumption of hot water drops sharply. A temperature jump occurs on the heater of a double-circuit gas boiler. As a result, the temperature of hot water rises sharply at the point of intake, which continues to work. The user cannot fully use the water, it goes into the sewer until the automatics work on the boiler, and the water of the desired temperature begins to flow to the user in a stable mode.

Since such situations are repeated several times every day, the unproductive consumption of hot water is increasing every day. At the same time, one should not forget about the discomfort that users experience during moments of unstable hot water supply.

Ways to solve the problem

The problem can be solved in ways that require significant investment, for example:

use with a boiler
purchase of a new boiler with a built-in boiler.

However, there is a way that is less expensive, but very productive - inserting an electric storage heater into the hot water circuit. Moreover, for this purpose, any standard heater with a volume of 30 liters is quite suitable, regardless of the manufacturer.

Use a water heater

A water heater embedded in the hot water circuit acts as a buffer tank. Its purpose is to equalize the temperature of hot water and smooth out possible temperature fluctuations. The storage water heater and the gas boiler heater are set to the same operating temperature.

Even if hot water taps are turned on simultaneously at different points of its intake, all users will initially receive water from the storage tank. Reduced time associated with waiting comfortable temperature water. Reduced waste of water.

Turning on and off the hot water supply at any point of the intake causes a temperature drop in the water at the outlet of the gas boiler. However, this water enters lower part water heater, and when it leaves the upper part, the temperature jump is completely smoothed out.

Water heater connection via ball valve allows you to switch to conventional system operation of the gas boiler, which can ensure uninterrupted hot water supply in the event of a water heater breakdown.

Using a bypass jumper with a tap in close proximity to the boiler allows you to exclude the boiler from the hot water supply system. If the boiler is on maintenance, the use of an existing water heater will ensure the uninterrupted operation of the hot water supply system.

Use expansion tank

IN winter period when the boiler has a heating circuit enabled, any hot water activation causes it to turn off so that the hot water circuit can turn on. During the summer period, when the boiler is not connected to the heating circuit, each hot water switch-on causes the gas boiler to switch on.

Often, the user turns on the hot water faucet just to rinse their hands. The boiler turns on or switches, hot water flows through the pipes. But the user can simply not wait for it by washing his hands with cold water.

Meanwhile, frequent and useless inclusions and switching of the boiler “eat up” its service life. A possible solution is to install a small expansion tank. It is installed in front of the water heater. In the presence of such a tank, for the first time after turning on the tap, hot water enters the pipe exclusively from the water heater due to the increase in pressure in the tank. Thus, in the case of a short use of hot water, there is no need to turn on and switch the boiler.

Use recycling pump

The best option - the water heater is located in the immediate vicinity of the hot water intake points. The closer it is, the faster hot water will enter the tap, the more efficiently it is used. If this option of installing a water heater is not possible, then it is recommended to install a recirculation pump.

The pump is installed on the segment between the water heater and the hot water intake points, ensuring the slow movement of hot water through the pipes. In addition, if you embed a heated towel rail on this segment, it will perform its direct function at any time of the year, regardless of the operation of the heating circuit of the boiler.

The effectiveness of the proposed method

With a relatively small cash outlay, the installation of a water heater, expander and pump allows you to:

save up to 25 thousand liters of water per year if a family of four lives in the apartment,
use water at a comfortable temperature even in the case of simultaneous operation of several points of water intake,
reduce the consumption of gas and electricity,
extend the life of the double-circuit boiler.

When problems arise with the preparation of hot water in a double-circuit boiler, it is necessary first of all to determine according to which scheme the boiler operates in the DHW mode. There are two options: bithermic heat exchanger and secondary heat exchanger.

In the first case, the heating circuit and the hot water circuit are combined in one heat exchanger - the primary one. When water preparation is required, the heating circulation pump stops and the entire boiler power is given to the passing tap water.

In another case, the boiler is equipped with an additional (second) plate heat exchanger and a switch (three-way valve). When it becomes necessary to prepare water, the heat carrier from the heating circuit is directed to the second heat exchanger, through which heat is transferred to the flowing tap water. At the same time, the pump continues to work - to drive to pump the coolant in a small circle.

Therefore, for different schemes, problems with hot water must be diagnosed differently.

The most common problems:

Baksi boiler does not heat hot water well

baxi boiler does not heat water (hot water does not turn on)

If the boiler does not turn on as needed

You open the mixer valve, but the boiler does not react and does not try to ignite the burner, and no errors occur. Regardless of the scheme of operation of the DHW circuit of the boiler, a sensor is installed on the outlet pipeline, which determines that the water has begun to be parsed. It is also called a DHW flow sensor. Sensors are different types: some simply determine the presence of water movement in the pipeline, others can quantitatively measure the flow. The latter are used to provide greater comfort due to precise control of the burner power depending on the flow rate.

In both cases, at the beginning of the water flow from this sensor, a signal must be sent to the control board. If for some reason this does not happen, the boiler will be idle.

The sensor type is easiest to determine by the number of contacts. Two means it is a closing microswitch. Three - a sensor with a flow meter.

Sensor Diagnostics

If the flow sensor is a microswitch, then for diagnostics it is enough to check the contact closure with a tester. To do this, disconnect the contacts from the sensor, connect the tester in the “ringing” mode, turn on the water tap. If the circuit does not occur, then the sensor is faulty and requires inspection and, if necessary, replacement. It happens that the accumulated dirt interferes with the circuit and it is enough to clean it. Poor quality of tap water and lack of pre-filters is the most common problem. Reed sensors contain a magnet, so they attract rust microparticles and quickly fail.

Sensors with a flow meter register the amount of water flow, which can usually be displayed on the boiler display. For BAXI boilers you need:

hold the “i” button to access the information menu for 5 seconds

use the DHW temperature adjustment buttons to scroll to parameter A08 (actual water flow through the sensor, liters per minute * 10)

Now it remains to compare the actual water flow from the tap with the sensor flow. If the actual flow does not match the value of the sensor, then most likely it needs to be replaced.

Since the mechanical part of the flow sensor is a turbine, in case of contamination, it can wedge and the signal from the sensor disappears. No signal from the flow sensor - the boiler stops heating water.

Three way valve installed in boilers with two heat exchangers. When a signal is received from the flow sensor, the electronics give a signal to the valve and the heated water from the first heat exchanger is sent to the second heat exchanger, where heat is transferred to the passing tap water. If, for example, actual switching does not take place (valve defective), then the heating medium will continue to circulate in the heating circuit and there will be no heat transfer to the hot water circuit.

If, for example, a valve closes the heating circuit only partially due to a malfunction, then there will be problems with insufficient heating of hot water, since part of the heat will go to the heating system.

Burner modulation errors

To heat running water, in most cases, a boiler power close to maximum is required. In modern boilers, the burner power is regulated over a wide range. Adjustment occurs by changing the amount of gas supply by the gas valve. The amount of adjustment is determined by the control board, depending on the logic of operation and settings. The process can be observed visually by the height of the flames on the burner.

If the boiler settings are set to 100% boiler power in DHW mode, but visually the flames on the burner are weak, or obvious interruptions are visible, then you should check:

gas valve setting (static and dynamic gas pressure)

control board

Such checks may only be carried out by a qualified technician.

Temperature sensor malfunction

The boiler determines the actual temperature of hot water according to the readings of the temperature sensor. Therefore, if for some reason incorrect readings are received from it, the boiler may not work correctly in the hot water preparation mode. The temperature sensor is a thermistor with resistance versus temperature. Checking such a sensor is to measure its resistance at a known temperature. Baxi boilers are equipped with NTC sensors with an inverse dependence of resistance on temperature. At room temperature, the sensor resistance should be approximately 10 kOhm, at a temperature of 45 degrees 4.3 kOhm.

Clogged heat exchanger (reduced capacity)

Often scale or dirt build-up on the inside walls of the heat exchanger is the cause of problems with hot water. If tap water does not undergo preliminary filtration (coarse cleaning) and the temperature of hot water is too high - the walls of the heat exchanger become overgrown with scale and dirt over time, their thermal conductivity and flow area decrease. Each time the user increases the DHW temperature on the boiler more and more to get the desired result on the mixer. With an increase in temperature, scale forms even faster and, as a result, the DHW temperature of the boiler is at its maximum, and the water is not heated enough. This process has a particularly negative effect on a boiler with a bithermic heat exchanger. Plate heat exchangers lend themselves well to flushing.

Control board errors

The control board should be considered as the cause of hot water problems when all other checks have failed. The cause may be a malfunction in the flame modulation circuit. The boiler control unit constantly adjusts the burner power depending on the conditions, and if there is a malfunction on the board, the boiler may spontaneously reboot or turn off when reaching the maximum power, which in most cases is required in the hot water preparation mode.

As board errors, it is still possible to incorrectly configure it. But this only applies to those cases when problems appeared after its replacement. BAXI boards are universal and require customization for a specific boiler.

One of the problems that can happen when using a double-circuit boiler. The boiler does not heat hot water. The main and most common reason why the boiler does not heat water well is the heat exchanger is clogged.

In this article I will describe how I treat this problem. Thus, you can also get out of the situation if you have a double-circuit boiler with a plate heat exchanger.

I have a well at home and the water is very hard, so there are always problems with hot water, so I use citric acid to fix the situation.

The task is this. How to deliver this acid to the inside of the heat exchanger with the least effort.

I found such a way. I have a magnetic converter at the entrance to the boiler, which should remove the hardness of the water, but it does not remove it, in my opinion this is a fiction. But for me it is good that it is installed directly at the entrance to the boiler. You can see it in the photo below.

It has an American nut on it, unscrewing which you can easily pour citric acid into the inside of the pipe.

But for this you need to turn off the water. Next to the boiler I have a collector. He is in the photo below.

Now all the ducts on it are open and with one easy movement I shut off the water supply to the boiler.

All water is blocked, now you can unscrew the American on the magnetic filter. And do not forget to come up with something, from the flowing water from the boiler, there is not much of it, but it is there. I wound up the rag.

Then I pour citric acid into the inside of the pipe.

I twist the American back and open the tap for supplying tap water to the boiler.

Now it is important to understand when the acid enters the heat exchanger. Since my water tap is located a meter from the boiler, I determine whether the acid has reached the heat exchanger to taste. I just open the faucet in short jerks and taste it, how “sour” went, which means the whole system from the magnetic filter to the faucet is full citric acid.

Next, you need to turn off the tap so that your family does not drain all the acid ahead of time.

I refuel the system at night and until the morning I have it acidified. In the morning I open the water supply valve to the boiler and drain all the acid. The water will sizzle, don't be alarmed.

A question may arise, but will the acid heat exchanger not eat through? I poked around on the forum of chemists and came to the conclusion that organic acid (citric refers to it) is harmless to copper.

I use this method as needed. If you don’t like how the boiler heats water or the pressure of hot water has become weak, I take and process the heat exchanger with citric acid.

If you have polypropylene connections to the boiler, and there is no place to fill the acid, then think of something similar, it will not take much time.

Questions about malfunctions of Arderia boilers

Question: On my gas double-circuit boiler Arderia esr 2.13 ffcd, the display shows an AA error (boiling water). You set the temperature, it catches up with it as usual, and then as soon as it drops by a few degrees, it turns on, and so on ad infinitum. It turns out that it turns on every 10 seconds. The pump is running, the filter has been cleaned, all taps are open, the sensor is working. Most likely, the problem is in the 3-way valve. Tell me what
do?

Answer: It is necessary to call the master to reconfigure the boiler, namely, Arderia has a service menu that can be accessed from the control panel, and there it is necessary to increase the setting of the difference between the set temperature and the start temperature.

Question: After 2 years of normal operation, the following things began to happen: when the heating is connected during heating, a sharp increase in pressure occurs (according to the readings of the pointer "pressure gauge") and an emergency discharge of the coolant. What is the problem?

Answer: Most likely - damage to the expansion tank membrane or lack of air (nitrogen) in the air chamber (unless, of course, there are shut-off valves on the tank that "accidentally" closed. It is also possible that the three-way valve is not working.

Question: We installed and connected the Arderia 2.13 gas wall-mounted boiler, which served exactly 2 years without complaints and malfunctions began. Heating works fine. But the hot water doesn't want to get warm. The burner either goes out, then lights up again and the water is barely warm or even cold. And even when the tap is opened, the batteries suddenly start to heat up. Who faced this, tell me what could this mean?

Answer: If barely warm water flows, then the three-way valve switches. As an option, a 2nd heat exchanger on the heating side. That is, if the heating boiler works stably and reaches the nominal value, then no. If the hot water pressure is in order, it is possible that the secondary heat exchanger is clogged along the heating channel. At the request of the hot water supply, the boiler is ignited, goes into nominal value, but the heat is not removed, so the boiler extinguishes the burner. Another option is the hot water temperature sensor is lying.

Question: We installed and connected the Arderia esr 2.13 ffcd wall-mounted boiler. Worked for 4 years. recently everything went offline. Right down to the backlight. IN emergency mode does not exceed. I removed the board, pulled it out of the casing, there are 2 fuses. But they are whole. What happened and how to be saved? A complete feeling that the food was just gone. Power supply through the stabilizer. The stabilizer is working.

Answer: Change the board, set the DIPs on the new board as on the old one.

Question: We installed and launched the arderia esr 2.20 gas double-circuit boiler. I have a question about how it works. The boiler operates practically without stopping the pump, while the temperature of the coolant drops to the set value after the burner is turned off, and the burner fires again. And so almost without pause. Didn't notice this before. It has also been noticed that when the hot water supply is turned on, very hot water comes out of the tap first, you cannot substitute your hands. Is this a malfunction and how to increase the pause time.

I also wanted to ask about this moment. I tried to regulate the operation of the boiler according to the room temperature.

Boiler not heating water? There is only one reason - scale

I set it to 27 degrees (not comfortable below), the boiler works for a long time, while the coolant heats up to a maximum (80 degrees C), then when it gets hot it turns off.

It can even “fall asleep” for a long time (for half a day or more), although the rooms are already getting cool and it would not hurt to turn on, but I look at the remote control - the temperature shows 27, although there is a feeling that it has fallen much lower. Whether the sensitivity of the remote control is very uncomfortable + -1
degree, or is it some kind of malfunction. Who can say anything about this. The boiler has been in operation for 2 years.

Answer: I can assume that the remote control is poorly located, there is no air circulation around it.

Question: I do not like the mode of operation of the gas boiler Arderia esr 2.20 ffcd when controlled by the temperature of the coolant. I will describe the mode of operation in more detail: Suppose the temperature of the coolant has dropped to the lower limit, at which the gas supply is triggered and heating occurs
coolant.

Moreover, heating occurs for no more than half a minute, while the pump continues to circulate water. During the next half a minute during the circulation of the coolant, it cools down again to the lower limit and the heating is turned on again, and so on practically without pauses. I did not change the values of the installation (factory) parameters and do not know how to do it.

The only thing that I checked with the parameters given in the manual, they are the same. Previously, I did not notice such an operating mode, because it was the other way around: at first, for a certain time after the boiler was activated, the coolant circulated without heating, then the heating turned on, the pump continued to circulate for a certain time, then it turned off and there was a pause in its operation, now this pause simply does not exist.

Sometimes during the day, in order not to load the boiler, I turn on the timer mode (but the minimum value there is one hour). I would like to hear your opinion on this operation of the boiler and how to put it in order?

Answer: The other day there was an A8 error, the boiler puffed like a steam locomotive, ignition and burner extinction after 30 seconds. This happened after heating the water in the heating system, flushed the heating circuit in the boiler. The problems are gone. I recommend that you do the flushing of the boiler.

Question: We installed and launched the Arderia 2.20 boiler. DHW is either cold or hot, gas is not cut off at this time. after 20-25 minutes constantly hot. Here's another thing, the water becomes comfortable at a temperature (not cold) only with a small pressure at one point, if you open hot water in another place, the boiler may go out. I read the instructions, I'm inclined to flush the DHW heat exchanger. Can you tell me something else?

Answer: Maybe your heating system is airy, and while air and water are circulating around the circuit through the heating heat exchanger, the water temperature is unstable. I suppose you can check this by turning off the boiler for half an hour and turning it on for heating to listen to the noise of seething in the boiler, if the air is seething, if not, then probably a three-way valve.

If this is your boiler circuit, then it is highly likely that the three-way valve is faulty
because it stands at the outlet of the heat exchanger and a very hot coolant comes out through it and destroys the 3-way valve. On most boilers, the 3-way one is on the heating return and operates at a lower temperature.

Question: A wall-mounted Arderia 2.20 boiler is installed and connected in the house. The problem is that it does not heat hot water. when you open the faucet, cold water flows out, this happens in both summer and winter mode. At the opening of the mountains water, the flame turns on and it heats the heating circuit. At first I thought it was a three-way valve, I bought a new one and installed it. But the problem was not solved, everything remained the same. Tell me what to do

Answer: Scheme: The hot water tap was opened - the flow began - the DHW flow sensor was triggered - a signal was received on the control board - the control board processed the signal and sent a command to the three-way valve - the three-way valve worked and redirected heating water in plate heat exchanger— Went heating cold hoz. water in the secondary plate heat exchanger - mountains went out of the tap. household water.

What is the weak link in this algorithm? DHW sensor - board - three-way. We start in order with the sensor. The sensor may stupidly fail to work due to the fact that the pressure that the water flow creates is weak or increased hydraulic resistance, i.e. the filters or dirt in the sensor itself are clogged. A clogged secondary also creates an increased hydraulic resistance, but in this case, the heating of the DHW would rather take place in the pulsation mode, and not be absent at all, all the more so.

Question: We have installed and launched the Arderia ESR 2.35 FFCD gas boiler. When ignited, a decent cotton follows. Cleaned, inspected the gas valve, pipe, electrodes, etc. Played around with the min. pressure on the valve, did more and less than the factory one. It still pops, though a little less. When you pull the wires off the modulating coil, the turbine gradually starts to spin up to high speeds (from observation).

With the wires of the modulating coil removed, the boiler ignites more smoothly. How to make it work at a minimum without turning off the modulating coil? How to reduce the starting voltage on the coil? Reduce the starting voltage on the coil - Switch 5 on the board - to the lower position. Then reduce the pressure with the “MIN” resistor on the board. Then - return switch 5 to its place.

Answer: When gas is added, the boiler adds air. The power is removed, the flame has decreased, the temperature has dropped, it adds voltage to the modulation coil and increases the fan speed. Just in case: there is a screw under the modulation coil. It allows you to change the min. gas pressure without changing the fan speed. But act sensibly, because it will be difficult to return back.

Question: I have such a problem with the Arderia double-circuit boiler. DHW is constantly at 40 degrees, now the summer is warm, probably 70-75 degrees, I can’t say for sure! I called the master, unfortunately, we live in a regional center far from service centers! He told me that either the cold water pressure is weak or it is in summer season warmer goes and therefore there is an overheating of water! He says to reduce the gas supply on the board or on the valve, in my opinion, tighten the nut, no sense! You turn off the water, and it still buzzes for 1-2 minutes! Is there anything that can be done to keep the water warm?

Answer: It is necessary to check the burner setting, if it is normal, then just open the water tap harder.

Question: Installed the boiler Arderia esr 2.13 ffcd. It seems to be crammed with automation, but the gas workers are forced to install an RMS with 2 sensors for CH4 and CO. I still agree to methane, but I don’t want to throw money away for the second one. Yes, and SNiP echoes the same thing to me. But they are in no way. Here I want to prove that the boiler has a reverse thrust sensor (aka carbon monoxide concentration sensor) But I can’t find documentary evidence anywhere. Although he's definitely there. If there is a notorious reverse thrust sensor. Show me where it is in the boiler?

Answer: The role of the thrust sensor is performed by an air pressure switch. Located inside the device. Turn off the boiler when the chimney or air supply pipes are clogged. Or will not let him turn on with these problems. The draft interrupter is just one of the elements of the boiler; in fact, it is equipped with a reverse draft sensor (if we talk about boilers with an open combustion chamber). And if the leakage of flue gases does not occur at the installation site of this sensor (this may be a leak in the chimney after the boiler or through leaks in the combustion chamber), then this sensor will not react in any way.

Question: The Arderia dsr 220r boiler has been in operation for about a year. About a month ago, problems with the hot water supply began (when the hot water is turned on, the AA error lights up), I checked the electric drive of the three-way valve - it works, I turned the valve itself with a screwdriver and it turns normally. I collected it back - it worked, but not for a long time, a week and again an AA error.

At the moment the DHW is turned on, hot water only enters the hot water supply pipe for a few seconds (apparently at the moment the tap is switched), and then all the boiling water goes into the heating circuit and after a while the AA error lights up. I took everything apart again, twisted it, but it didn’t help anymore. During the rotation of the crane inside in certain positions, clicks are heard as the contacts of a relay or position sensor.

What could be the problem?

Answer: These contacts are the problem. maybe just broken or rotted or stuck. Dismantle, look, change. Another option - perhaps the secondary heat exchanger is clogged with salt deposits. Rinse and clean.

Question: Tell me, I heard that three-way valves often fail on Arderia 2.13 boilers. How can you extend their service life?

Answer: I can say that the three-way valve in the ardery is normal (almost like everyone else) 🙂 the bottleneck is the seal of the drive axis (I suspect that there is no seal at all) I disassemble it preventively, fill the contact group with grease and install it after assembly. In fact, a three-way valve-cock is a switch for the flow of coolant from the main heat exchanger either to CO or to a DHW plate heat exchanger.

In the design of the three-way contacts are used (you can call them limit switches), depending on the closed contact, voltage is applied to the first or second contact, when the desired position of the locking ball is reached, the contact is mechanically opened. the engine stops. Accordingly, the CO or DHW circuit operates. The reasons for failure are commonplace, poor sealing of the locking ball drive shaft.

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What to do if the Vailant boiler does not heat hot water

Vaillant boiler does not heat hot water due to blockages

This is one of the most common problems. Most often, the reason is the low quality of water - scale appears, nodes, filters and pipes become clogged.

Pressure sensor in the heating system.
flow sensor.

Gas boiler does not heat hot water

If the flow sensor is clogged, water will flow but the fan will not move. Accordingly, the signal to turn on the heating is not received. There are two ways to solve the problem:

Do not rush to disassemble the boiler and try to "purge" the system first. Turn off the main water supply at home. Open the hot water faucet and let the water out of the system. Now the percentage of air in the pipes has increased. Start abruptly opening and closing the water tap directly in front of the boiler. These simple manipulations will help create pressure and clean the flow sensor fan from debris.
If "purging" does not solve the problem, it is necessary to open the boiler, unscrew the flow sensor and clean it manually.

If the Vailant boiler does not heat hot water, the secondary heat exchanger should be checked. It also tends to get dirty quickly. But, fortunately, it is easy to remove, clean and install back.

A clogged three-way valve can also cause the boiler to fail to heat water. And you can remove this node yourself, clean it and install it back.

Having bought a Vaillant boiler, be sure to check with the seller information about the places where the filters are installed. You can clean and change these components yourself.

Faulty pump

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Repair and errors of gas boilers Viessmann Vitopend 100-W

Replacing the flow heat exchanger

Close the Viessmann Vitopend 100-W wall-mounted boiler from the heating circuit side and from the DHW side and drain the water from it.

Fig.8. Dismantling the flow heat exchanger

E - Heating water flow, F - Heating water return, G - Cold water, H - Hot water

Check the DHW connections for scale and the heating circuit connections for contamination. If necessary, clean or replace the flow heat exchanger.

Work to replace the flow heat exchanger:

— Slightly move stepper motor A up.

— Turn the stepper motor adapter B with stepper motor A 1/8 turn counterclockwise and remove it.

— Loosen the two screws C on the flow heat exchanger and remove the flow heat exchanger D together with the seals.

- Assemble the flow heat exchanger D in the reverse order using new seals. Mounting screw torque: 5.5 Nm.

— When mounting, pay attention to the position of the fixing holes and correct fit seals.

— Ensure the correct mounting position of the flow heat exchanger. Observe the marking "Top" (top).

- Assemble the boiler in reverse order.

— Fill the boiler with water, pump (bleed) and check for leaks.

Temperature limiter and boiler sensors Wisman Vitopend 100-W

Fig.9.

The boiler does not heat or heats hot water poorly: cause and solution

Removing the temperature limiter and boiler sensors Viessmann Vitopend 100-W

A - Temperature limiter, B - Boiler water temperature sensor, C - Outlet hot water temperature sensor (gas combi boiler), D - Draft tilt control sensor, 5 - Cylinder temperature sensor (gas single circuit boiler)

temperature limiter

Check that the gas burner control is not reset after a safety shutdown even though the boiler water temperature is below 90 °C.

— Check the current flow of the temperature limiter using a universal measuring instrument.

— Remove the defective temperature limiter.

- Install a new temperature limiter.

— To unlock, turn the control knob briefly to the right until it stops and then back. The ignition process is repeated.

Boiler water temperature sensor:

— Disconnect the cables from the sensor.

— The boiler water temperature sensor is located directly in the heating medium (risk of scalding).

— Drain the boiler before replacing the sensor.

Outlet temperature sensor (Viessmann Vitopend gas combi boiler):

— Disconnect the cables from the sensor.

- Measure the resistance of the sensor and compare it with the characteristic.

— If there is a strong deviation, replace the sensor.

— Before replacing the sensor, empty the boiler on the DHW side.

Thrust rollover control sensor:

— Disconnect the cables from the sensor.

- Measure the resistance of the sensor and compare it with the characteristic.

— If there is a strong deviation, replace the sensor.

Cylinder temperature sensor (gas-fired single-circuit boiler Wisman Vitopend):

— Disconnect plug 5 from the cable harness outside the controller.

- Measure the resistance of the sensor and compare it with the characteristic.

— If there is a strong deviation, replace the sensor.

Fault indication (error codes) of Viessmann Vitopend 100-W boilers and their elimination

A0 - Burner blocked

Gas pressure too low - Check gas pressure and gas pressure switch

E0 - Burner blocked

Traction control device activated - Check flue. If the draft stall control device has actuated 10 times within 24 hours, the burner goes into fault mode (fault indication "F6").

F2 - Burner failure

The temperature limiter has tripped - Check the filling level of the heating system. Check circulation pump. Remove air from the installation.

Check temperature limiter connecting cables. To unlock, turn the control knob almost to the stop to the right and then back (reset).

F3 - Burner failure

The flame signal is already present when the burner is started - Check the ionisation electrode and connecting cables. Switch mains switch 8 off and on again (or reset, see F2).

F4 - Burner failure

No flame signal - Check ignition electrodes / ionization electrode and connecting cables, check gas pressure, check gas control valve, ignition, ignition transformer.

F6 - Burner failure

Traction tipping control device activated - Check the traction tipping sensor.

F30 - Burner blocked

Boiler temperature sensor short circuit - Check the boiler water temperature sensor.

F38 - Burner blocked

Break in the boiler temperature sensor - Check the boiler water temperature sensor.

F50 - No hot water preparation

Short circuit of the temperature sensor of the DHW cylinder (gas single-circuit boiler Wiesmann Vitopend) - Check the sensor.

F51 - No hot water preparation

Short circuit in outlet hot water temperature sensor (Viessmann Vitopend gas combi boiler) - Check temperature sensor.

F58 - No hot water preparation

Open circuit of the temperature sensor of the storage water heater (gas single-circuit boiler Viessmann Vitopend 100) - Check the sensor.

F59 - No hot water preparation

Open circuit of the outlet hot water temperature sensor (gas combined boiler Wiesmann Vitopend) - Check the sensor.

b0 - Burner blocked

Traction tipping sensor short circuit - Check the traction tipping sensor.

b8 - Burner blocked

Traction control sensor break - Check the sensor.

Possible causes of changes in room temperature

The rooms are too cold:

— Incorrect setting of the room temperature controller — Set the desired room temperature on the room temperature controller.

— The heating system is switched off — Switch on the mains switch. Turn on the main switch, if available (located outside the boiler room). Check the fuse in the distribution electrical panel(home input fuse).

- Incorrect controller setting - Set the regulator knob more than high temperature coolant.

— DHW priority — Stop DHW extraction or wait for the DHW cylinder to finish heating up.

- Fault indication on the display: The symbol "U" appears and a fault code, for example "F2" - Turn the rotary selector to the right almost to the stop and then back (reset). If the error display reappears, contact your heating contractor.

— Air in the heating system — Vent the radiators.

— No fuel — Open the gas shut-off valve.

— Fault in the supply air system or in the gas path — Contact the heating service.

— Circulation pump defective - Contact the service department.

The rooms are too warm

— Incorrect setting of the room temperature controller — Set the desired room temperature on the room temperature controller

— Incorrect controller setting — Set the hot water temperature to a lower temperature with the regulator knob.

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Do-it-yourself geyser repair Oasis (Oasis)

Today we will consider the repair of the Chinese geyser Oasis (Oasis) with our own hands step by step.

The most common malfunction of the Oasis geyser is the failure of the water block membrane. In this case, the Oasis usually does not ignite. It is not difficult to identify this malfunction, and repairs can be done by hand. We will consider the disassembly of the column below. First, remove the column housing, set the water flow regulator on the column water block to the fully clockwise position and open the hot water tap. At the same time, we look at the microswitch, which is located in the middle - between the gas and water block of the column. If the membrane is working, then the water block rod presses on the foot, which releases the microswitch button, respectively, the column should crackle and light up. If the foot moves away from the microswitch well, but there is no cod, then the microswitch is most likely faulty. It can be checked by disconnecting the connector and closing the contacts.

Consider the case when the foot barely moves, or completely stands still when the water is turned on at the tap. It is likely that the water block membrane is torn and the pressure necessary for the movement of the water block is not created. Another common malfunction is the leakage of the stuffing box of the Oasis geyser. A gland leak usually leads to a breakdown of the same microswitch, because drops drip onto it. If you have found this particular malfunction, then do not waste time and change the gland assembly, otherwise your Oasis will soon stop igniting and turning on. Spare parts for repairing an Oasis geyser are not expensive, and I advise you, if you climb to disassemble the water block of the Oasis geyser, immediately change both the membrane and the stuffing box assembly. Basically, they are consumables. It will be a shame later when, having changed the stuffing box assembly, you will encounter a replacement of the water block membrane in a month or vice versa. From experience, I also came across something else ... Let's say they changed a new membrane, your oil seal didn’t leak, it’s like they left it ... But it either leaked after a week, or, even worse, the column continued to burn when the water was closed, overheated, spat steam, happened something even more unpleasant if they did not have time to turn off the gas. Why did this happen? It's simple .. The stem of the water block in the stuffing box did not go all the way, but after replacing the membrane, it began to go to the full. When the rod barely moved, it was overgrown with salts, rust in the place where it did not go into the stuffing box ... Then everything is clear. The rod with an abrasive either erases the stuffing box ring, or even can jam there and not return to its original position. If you're lucky, then after this, at least the column heat exchanger will not leak, otherwise you will end up with expensive repairs

This means that the malfunction of the water block of the gas water heater has been found and you can consider how to repair the Oasis gas water heater with your own hands, disassemble the water heater. So, let's start step by step:

1. Remove from the geyser knob 1 - adjusting the gas supply of the gas block, knob 2 - adjusting the water flow of the water block, knob 3 - switch the geyser to winter / summer mode.

2. We find from the bottom right and left two self-tapping screws for fastening the cover of the column housing to the rear wall of the Oasis column and unscrew them. Usually it is inconvenient to get to the screws. Next, remove the front panel of the Oasis geyser from the top hooks on the back wall of the geyser.

3. Carefully, so as not to tear, disconnect the wire connectors that go to the column display from the control unit and from the temperature sensor.

4. Unscrew the two screws that secure the water block of the Oasis column to the back wall.

5. We unscrew the two screws that secure the gas column heat exchanger tube to the water block, and release the clamping flange. Remove the tube from the water block.

6. Disconnect the microswitch connector. The photo shows that it is wrapped in cellophane. This column had a stuffing box assembly, and so they decided to "zakolkhoz" in order to save the microswitch.

7. Disconnect the wires from the gas solenoid valve.

8. Disconnect the ground wire from the gas block by unscrewing the screw.

10. Disconnect the two self-tapping screws that secure the block of ignition and ionization electrodes to the burner of the Oasis geyser. Remove the wires going to the electrodes.

11. Unscrew the 2 screws that secure the column gas block to the back wall.

Why did a double-circuit gas boiler suddenly stop heating hot water?

Disconnect the power wires 1 from the battery compartment 2 of the geyser.

13. Now nothing prevents us from dismantling the water-gas unit and the burner assembly.

14. I tighten the two halves of the column water block housing with 4 screws. To disassemble the block, we need to unscrew them. Most likely, you will not succeed if you climb there with a screwdriver. The screws are made of low quality steel and you will rip off the splines. To prevent this from happening, I advise you to rip off the screws first with something like pliers, and then calmly turn with a screwdriver.

15. The block is half.

16. Remove the membrane of the water block 1 and the plate of the stem of the water block 2.

16. Under the plate of the stem of the water block is a hexagon - this is the visible part of the gland assembly. We need to unscrew it. Usually it is easily unscrewed, but the hexagon is 15 or 16 there (not a running size in Russia). The edge is very thin, it is difficult to hook it with a key. Don't rip.

17. In this photo we see the stuffing box assembly, which I removed.

We have finished the disassembly on this, now the Oasis geyser can be assembled in the reverse order by changing the gland assembly and the membrane. To a heap, I also change the microswitch if water dripped on it. But this is up to you. I hope my article turned out to be useful to you, and you made repairs, fixed the malfunctions yourself. If you do not want to bother with the search for spare parts and self-repair then contact me, I will come to repair

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I hope you find the instructions helpful. geyser Oasis. Download