DIY parapet gas boiler repair

In detail: do-it-yourself repair of a parapet gas boiler from a real master for the site my.housecope.com.

The demand for the installation of a parapet gas boiler is increasing every day, because most craftsmen prefer this type of modern equipment.

The compact dimensions of the boiler make it an ideal solution for small apartments and private houses, as well as industrial premises where it is simply not possible to carry out a flue gas system.

The parapet gas boiler has a more advanced design, which greatly facilitates the process of installation and preparatory work.

The system has a closed combustion chamber and its own chimney, thanks to which the boiler no longer needs to be equipped with a flue gas discharge system. In this regard, they are also called "chimney boilers".

The air supporting the combustion of gas enters the boiler from the street, and the operation of the equipment itself does not depend on electricity.

Failure to comply with the main requirements when installing a boiler can become the main reason for complaints from caring neighbors, since the gases emitted have a specific smell and are very harmful to health.

In addition, violation of some requirements may affect the operation of the equipment: the boiler may regularly go out or not light up, smoke, etc.

To fix such problems will only help to re-install the parapet gas boiler, which leads to unnecessary costs.

When installing the boiler, observe the following rules and recommendations:

The boiler is always placed on the outer wall of the house, keeping the distance from the facade elements within 0.3-3 meters, depending on the power of the equipment.
It is forbidden to install the chimney outlet in closed rooms (entrance, balcony, loggias, etc.).
The section of the wall intended for the installation of a parapet gas boiler is treated with a non-combustible fire-resistant material in order to increase fire safety.
The boiler is never installed near (at least 0.2-0.3 meters) upholstered furniture, curtains and curtains, carpets and other combustible materials.
The room for the boiler installation is equipped with a ventilation system.
The power of the equipment is selected depending on the size of the heated housing.

Video (click to play).

The design of the parapet boiler assumes that combustion air enters the system and all combustion products are removed through the same coaxial pipe, which is led directly to the outside through the outer wall.

The coaxial chimney itself consists of two pipes - one serves to remove gases, and the second is necessary for fresh air to enter.

Some types of parapet gas boilers have an additional body designed to heat running water.

The presence of a convection hole allows you to heat small rooms without the use of radiators and pipes.

The main part of the work on the assembly and installation of a gas boiler can be done manually if you have the necessary equipment and parts.

True, at some stages it is still recommended to involve a specialist in the work, since the slightest mistake can nullify the operation of all equipment.

In particular, this concerns the installation of coaxial chimney pipes, as well as the first start-up of the boiler.

The exact process of installing a parapet gas boiler will depend on the equipment model. In any case, you should have in your hands a detailed instruction with a detailed indication of all stages of work and a drawing of the boiler itself.

First of all, it is necessary to break through the channel to bring the chimney pipes and air duct outside.
Its dimensions should fully correspond to the diameter of the pipe to be installed, and the position should be guided by the level of placement of the outer ring of the pipe.

The most suitable place is near the window, since in the future you will need to periodically service the chimney and check its working condition.

Now install the first air line fitting and secure it in position to prevent part movement. Immediately get down to work on installing the water supply section.

Fasten several pins on the work surface for attaching the parapet boiler. In the future, it is secured with nuts.

Install the branch pipe and the flue section in the same way and fix the fasteners, trying to achieve maximum sealing between all parts. In this case, the chimney section is installed at an angle to drain the accumulated condensate.

Connect the flue section to the corresponding branch pipe and install the protection. Adjust all gaps so that the burner flame burns evenly, without separation.

Next, pipes and radiators are connected according to the usual scheme, as well as the installation of an expansion tank.

Even after completely completing the installation of the parapet boiler, the equipment cannot enter into operation: the equipment is pre-checked by the specialists of the gas industry and conducted an introductory briefing.

Further work on the maintenance of equipment can only be entrusted to persons familiar with the design of your boiler and the rules of its operation.

You can view the whole process of work in more detail on the video "Installation of a parapet boiler in the house".

The insulation material serves as a protective layer that prevents the formation of condensation and slows down the corrosion process.

Installation of a heating system with polypropylene pipes

The process of installing polypropylene pipes is considered the simplest and most affordable, due to which many owners choose this particular heating option.

Installation of a chimney for a gas boiler

Installation of a chimney for a gas boiler begins with cutting an exhaust hole, the size of which depends on the diameter of the chimney pipe

DIY gas boiler installation

Another important stage in the process of organizing a heating system in a house is the installation of a gas boiler with your own hands, because it is the boiler that is considered the center of the house and the main source of heat.

A parapet boiler is ideal for heating small rooms or apartments. To be convinced of this, you need to start with theory. This is a heat generating device that operates on electricity and does not require the installation of a special chimney.

The most important difference between units of this type is isolated, closed combustion chamber... This reduces the combustion of oxygen and increases the safety of using the gas boiler. The parapet-type gas boiler combines the best qualities of gas and convector units, it is easy to maintain and inexpensive to repair.

The internal structure of the boiler is simple and includes:

a body made of steel, which, when heated, is a convector;
burner and gas valve;
heat exchanger;
closed combustion chamber, completely sealed;
gas duct, its purpose in the removal of carbon dioxide and the intake of fresh air.

The scheme of operation of the heat-generating device is simple, when the gas boiler is turned on the pilot burner is ignited with the help of a piezo ignition. Then the gas flows to the main burner, the heat exchanger is heated. Then the tank of the coolant participating in heating is warmed up from it. The installed automation of the gas boiler gives a signal when it heats up to ninety degrees and the boiler turns off the pilot burner, after cooling down, the process is repeated.The temperature is automatically maintained at a preset level.

Combustion products are removed through a coaxial chimney. The design of the chimney allows you to simultaneously remove carbon dioxide and supply oxygen through two pipes of different diameters. A pipe with a small diameter is located inside and is intended for exhaust, and a large one for fresh air.

Gas boilers may differ in appearance, they are made both in wall and floor versions, and are also designed for different powers: from 7 to 16 kW. The power of the unit must be calculated on the basis of the area of the house or apartment and natural heat losses (windows, poorly insulated walls, doors) must be taken into account.

Parapet boilers have advantages and disadvantages. The main thing is, when choosing a gas unit, to know exactly for what purpose it is being purchased and where it will be located. Since in the future this will allow avoiding financial expenses for repairs due to poor-quality operation of the heat-generating device.

Consider the positive aspects of installation and use:

Compact size, can be placed on the wall and will not take up useful space.
The chimney and ventilation system, enclosed in a coaxial pipe, is very convenient and easy to install.
Installation requirements are minimal, for wall placement there are no requirements, for floor placement - a window and a doorway of at least 80 cm.
Unit you can install it yourself, there are no installation requirements.
Strict and modern design can fit into any interior, the paint does not fade and is easy to clean.
Automation and temperature and pressure sensors make the boiler very safe.
In the room where the gas boiler is located, it is not necessary to install radiators, as the case heats up during operation.

The installation of the boiler is quite simple, so it can be done with your own hands, the main thing is not to forget to look again at the installation instructions, which are included in the documentation for the unit. You also need to know the principles of using gas equipment.

All work should be done in stages. The stages include:

Coordination of the installation scheme in the gas service (if necessary).

Unpacking the equipment, checking the contents and removing the packaging elements. It is not recommended to immediately connect the boiler, especially if it was brought from the cold, the temperature should equalize with room temperature.

Acquaintance with the attached documentation, a thorough study of the installation and operation instructions, it must be in Russian or have a competent translation.

Marking the place for installing the boiler and placing the outlet pipe, it is also important to check the presence of a water supply (for a double-circuit boiler).

Installing fasteners and making holes for the pipe, the location should be as convenient as possible for subsequent maintenance and repair.

Installation of the first chimney pipe, its fixing.

Preparation and installation of pipes for water supply.

Fixing the boiler to the wall or to the floor.

Installation of the second chimney pipe (at an angle).

Installation of protection and regulation of individual parts of the boiler.

Installation of pipes, heating radiators and a water tank.

As a heat carrier do not use water taken from central heating... Some heating devices are very picky about the quality of the coolant, so this issue must be taken very carefully, otherwise expensive repairs may be required.

When the coaxial pipe is removed, the outgoing combustion products should not interfere with those around; it is forbidden to lead the pipe into an entrance, a closed loggia, onto a glazed balcony, under a canopy or into an arch. It is better to entrust the repair of gas boilers to a specialist, especially if complex mechanisms are out of order.

According to safety rules, the repair of all equipment dangerous in operation, which includes gas heating units, must be carried out by specially trained qualified specialists. However, in remote areas, the arrival of a specialized repair team can be expected for a very long time. Therefore, in case of emergency, if the matter does not concern automation and the gas pipe, you can do it yourself and repair the gas boiler yourself.

Modern gas heating systems are complex systems. Control of their work is carried out using a whole range of automatic devices, which must be familiarized with before starting an independent repair of gas boilers.

The main elements of the security group:

Draft sensors designed for 75 0 C. This device makes it possible to monitor the state of the chimney. If the normal flue gas discharge fails, the temperature rises and the sensor is triggered. Optimally, in addition to the traction sensor, a gas alarm is acquired.
The monostat protects turbocharged gas units from impaired removal of combustion products due to a clogged chimney or heat exchanger.
The limit thermostat is designed to control the temperature of the heating medium in the heating system. When the water boils, the overheating sensor turns off the device.
When the flame is detected, the flame control electrode switches off the operation of the heating unit.
A blast valve is used to control pressure. With an increase in pressure above the critical value, a portioned discharge of excess coolant occurs.

Attention! The wear of the stuffing box leads to a constant flow of the coolant from the valve. The remedy is to replace the valve.

Various components of the heating system can fail and for various reasons. It can be - low-quality parts, violation of the requirements for operation, sharp blows to the component parts of the unit.

The most common reason for the failure of volatile devices is a configuration failure. Do-it-yourself gas boiler repair should begin by checking that the settings are correctly installed and the presence of open contacts. When troubleshooting, the unit is set to the "Winter" mode and the setting is set to the maximum heating temperature.

If the pump does not work, then either you just need to replace the cable, or you will have to change the pump itself.

If the burner is not supplied with gas, then it is necessary to make sure that the gas valve is open, the gas line is not clogged, the voltage supply is in order. If the problem persists, after all these steps, you will most likely have to change the electronic board.

The shutdown of parapet boilers in severe frosts can be caused by the appearance of ice on the chimney. The formation of an ice crust is explained by the content of water vapor in the exhaust combustion products. As a result of freezing of ice build-up and obstruction of the exit of flue gases, the device is automatically turned off and attempts to turn it on again will be unsuccessful.Advice! In this case, the automation of the boiler equipment does not fail, and to resume the operation of the heating equipment, it is enough to remove the ice from the smoke grate. In order to avoid such stoppages of the units, it is necessary to periodically inspect the chimney in severe frosts.Do-it-yourself gas boiler repair is not always possible and only in cases of visible and simple malfunctions. Complex breakdowns can be corrected efficiently and reliably only by specialists with the necessary knowledge and equipment.

Gas boiler complex mechanism... It can be divided into 3 main parts: electronics, gas pipes and burners, heat exchange unit (pump, tank, fan). Only the last part can be repaired on your own.

Attempts to restore the first two parts, without proper skills, will lead to final breakdown boiler, gas leakage and other negative consequences.

Gas boilers rarely break... This is due to natural wear and tear equipment, or because of factory marriage... Other cases of breakdowns are necessarily associated with the following factors.

The boiler can break down due to water. At risk, first of all, there are two-circuit devices used not only for heating, but also for hot water supply.

The fact is that rust from the pipeline, other fractions, clog the thin tubes of the heat exchanger during the year.

Avoiding troubles with water quality can help coarse filter... It is installed during installation per feed pipe liquids. For greater security, you can add to the system fine filter, or install a complete cleaning system.

Household appliances are resistant to power surges and shutdowns electricity. But a gas boiler is a finer piece of equipment. A power surge will cause the boiler to shut down or damage the electronics. A malfunction of the device or a power outage will lead to freezing of the heating pipes.

Read also: DIY kamaz board repair

In order to avoid sad consequences, they establish at least one of the additional devices.

Stabilizer - a device that will solve the problem of power surges. Its size is small, it is installed both in an apartment and in a private house.

Photo 1. Electronic voltage stabilizer Resant Lux for a heating boiler. The device is wall-mounted.

Uninterruptible power system. Will equalize the input voltage. Allows the boiler to work for a while in the absence of electricity. Suitable for use both in the apartment and in the house.
Gas generator. It does not affect the stability of the network in any way, but it can save with a prolonged power outage. Used only in the private sector.

Attention! When buying a generator, check if it really is single-phase.

Installation of complex equipment layman will entail serious consequences. In frequent cases, the following problems occur:

During installation neglected grounding... This leads to a build-up of static on the body of the device. When an electric arc occurs, the boiler automation often fails.
After installation did not release air from the system... The resulting plug will lead to rupture of the coolant pipes and damage to the pump.
Harness violations a gas boiler system, with a cast iron heat exchanger, will cause a split in an important part of the apparatus.

If the installation of the gas boiler is carried out correctly, operational problems arise only due to weather conditions... In cold winter, the desire to keep warm pushes people to use the boiler at maximum mode. The equipment withstands such conditions, but the gas system does not. A decrease in fuel pressure leads to interruptions in the operation of the apparatus. The automation starts to turn off the boiler. The problem is that this cannot be called a breakdown and it will not be possible to eliminate it.

Any malfunction of the gas boiler must be dealt with by a specialist. However, the opportunity to use the services of a master is not always there, and breakdowns are trivial... Let's consider the problems that can be solved on our own.

Usually the smell of gas appears when it leaks from the threaded connection of the supply hose... If there is a smell in the room where the boiler is installed, you need to open the window and turn off the boiler... Then follow the instructions:

Prepare the necessary things: soap solution, FUM tape, open-end wrench or adjustable wrench.
To apply mortar on all threaded connections. If bubbles begin to inflate, the leak has been found.
Close the gas valve.
Key expand the connection. Rewind on the external thread of the FUM tape and collect everything back.
Reapply solution and restart the gas supply.
If the leak has been repaired and the gas smell has disappeared, remove leftovers solution.

Attention! When it was not possible to find the leak, turn off the gas, call a specialist.

If during the operation of the boiler the sound emitted by the turbine has disappeared or has decreased - indicates a malfunction of the blowdown fan. For repair you will need: screwdriver, new bearing, cloth, grease.

Necessary turn off boiler and turn off the gas.
Remove the turbine.
With a rag to clear with turbine blades dust and carbon deposits.
Inspect Electric Coil fan for blackening. If everything is in order, move on or replace the fan.
Disassemble the fan housing. Inside the turbine shaft is installed bearing, his needs to be replaced. Some fans have sleeve instead of a bearing. In this case, her need to be lubricated.

The turbine may also not work due to undervoltage or malfunction of the control board. The first is eliminated with the help of a stabilizer, but the second only by calling a specialist.

Chimney problems arise only at boilers floor type... This is due to its size and vertical position. Hinged devices do not need to clean the chimney.

Chimney consisting from metal parts, cleaned with a metal brush. It must be disassembled and the accumulated soot removed mechanically. Whole the chimney is cleaned with special vacuum cleaners or chemicals. But for this you need to call a professional.

Photo 2. Three ways of arranging a chimney for a floor-standing gas boiler. The first option is the hardest to clean.

Boiler overheating is associated with contamination of the heat exchanger... To clean the device you will need: special hydrochloric acid solution, adjustable wrench, FUM tape, metal brush. Then follow the instructions:

Turn off the boiler, shut off gas and water.
Remove heat exchangerusing an adjustable wrench.
Clear it with a brush.
Through the pipe pour over into the heat exchanger acid solution... If foam appears, it means there is a lot of scale inside.
Pour out solution and repeat procedure.
Rinse.
Install back, beforehand wrapping all threaded connections with FUM tape.

Problems usually arise with combustion electrode. If the flame of the burner goes out after a few seconds, and the boiler gives an error, then the problem is in the combustion sensor. We turn off the boiler, turn off the gas.

To repair the electrode, you will need sandpaperwith the help of which the probe probes are cleanedwithout removing it. If the breakage remains, the sensor changes.

Exists two problemsthat lead to spontaneous boiler shutdown. The combustion sensor is broken or chimney clogged... The repair of both faults is described above in the article.

Watch the video, which tells about the malfunctions that occur during the operation of the boiler.

Most boiler breakdowns are repaired on their own, but this does not mean that you need to neglect the help of a specialist. Gas equipment is potentially life-threatening.

And also do not forget about maintenance... Cleaning the heat exchanger and chimney will save you from possible breakdowns.

Modern gas boilers are quite sophisticated technological equipment. With proper care and proper handling, the gas boiler will serve for a long time without any interruptions. However, even the most expensive and functional equipment has its own resource, after the exhaustion of which all sorts of malfunctions begin to appear.

DIY gas boiler repair

Knowing the main causes of malfunctions and the procedure for eliminating them, you can repair your gas boiler with your own hands. This is a very painstaking, responsible, but in most cases relatively easy job.

Contents of step-by-step instructions:

First of all, it is necessary to establish why any malfunctions may occur in the operation of gas heating boilers. A number of different factors can lead to problems.

Modern gas boilers are equipped with various automation equipment. These funds, in turn, are powered by electricity. And, despite the fact that the 21st century is already in the yard and systems for the use of alternative energy sources are being actively developed around the world, the problem of stability of power grids remains relevant for many regions, especially for remote villages and all kinds of summer cottages.

A sudden power outage or a strong surge in electricity is one of the main enemies of any modern gas boiler.

To avoid all the accompanying troubles, buy a quality stabilizer in advance. Do not spare money to buy this device - there is little sense from cheap models, so it is better to immediately allocate funds to purchase a good stabilizer from a well-known manufacturer. Be sure that in the event of a breakdown of the automation, you will spend much more money on its repair and replacement.

At home, wall-mounted models of gas boilers are often used. Such devices are simultaneously responsible for both space heating and hot water preparation.

The design of wall-hung boilers includes a flow-through heat exchanger. Low-quality hard water with various impurities is the main enemy of the heat exchanger of a gas boiler. At the same time, under the influence of low-quality water, the heat exchanger can fail in just one season.

Install special filters to prevent such damage. The best option is a complete water purification system. With it, your boiler will work as long as possible, and using purified water is much safer for health.

Any knowledgeable person will tell you: only qualified specialists should be engaged in the installation and piping of gas heating equipment.

Even the slightest mistakes at the stages of installation and connection of equipment can lead to irreversible consequences. For example, an incorrectly executed piping in the case of a cast-iron gas boiler more powerful than 50 kW will lead to the fact that the unit will simply split at low temperatures.

If you are not an experienced gas operator, entrust the boiler installation to professionals.

Therefore, if you are not an experienced gas operator, entrust the installation of the boiler to professionals - this way you will save yourself from many problems in the future.

Unfavorable weather conditions can also lead to the appearance of many different problems. In frosty winters, people turn on the heating at almost full capacity. This leads to a significant decrease in pressure in the gas pipeline system. As a result, boilers cannot fully realize their potential.

You will not be able to solve this problem on your own - you still cannot explain to your neighbors that by their actions they only aggravate the situation. As a solution to the problem, you can install an additional boiler that runs on a different fuel.

Automatic solid fuel coal-fired boiler with hopper

A modern gas boiler is a complex and potentially dangerous system. The main danger of such units is the risk of a gas explosion in the event of improper handling of the equipment or untimely elimination of various malfunctions.

Various kinds of automation are responsible for maintaining the operation of the gas boiler at an optimal level. An inexperienced user is often unable to understand its device. Therefore, it is better to immediately invite specialists to troubleshoot serious problems.

On your own, you can try to eliminate only visible damage and various contaminants that have led to the failure of the pipe, chimney and other parts of the boiler.

Typical malfunctions of gas boilers

There are a number of typical problems that you can fix yourself in most cases. Problems will also be listed, in the event of which you can only protect yourself before the arrival of a specialist.

If a distinct smell of gas or smoke appears in the room, immediately turn off the boiler and leave the room, opening it for ventilation.

Gas boiler functionality diagram

Call a professional immediately. Trying to solve the gas leak problem on your own without the necessary skills is extremely dangerous and unreasonable.

If the flame sensor or the gas supply pipe breaks down, turn off the boiler, close all gas valves and let the unit cool down completely.

Return to the area after a while to check for the smell of gas. If everything is in order with the draft, try to turn on the boiler again. If there is no thrust, immediately call a repairman.

Overheating is one of the most common problems in modern gas boilers. The reason for this may be a malfunction of the automation equipment or a clogged heat exchanger.

It is impossible to cope with the repair of automation without the appropriate knowledge.

You can also clean the heat exchanger with your own hands. The most common materials for the manufacture of heat exchangers are copper and stainless steel. There is usually no problem cleaning them, but be extremely careful anyway.

Primary heat exchanger for wall mounted gas boiler Beretta

According to the recommendations of the manufacturers, the heat exchangers must be cleaned of soot every few years (each manufacturer indicates a specific interval in the instructions for their equipment).

Primary heat exchanger (heating circuit) of the gas boiler Rinnai SMF

To clean the heat exchanger, simply remove it and clean it thoroughly with a metal brush. In the case of a copper heat exchanger, it is best to replace the brush with a metal sponge used for washing dishes.

The problematic place of fans is their bearings. If the fan of your boiler stops developing the set number of revolutions, try to eliminate the problem as soon as possible.

Fan (3311806000) for Daewoo gas boiler

To do this, remove the back of the fan, take out the stator and lubricate the bearings. Machine oil is fine for lubrication, but it is best to use a higher quality carbon compound with heat-resistant properties if possible.

Fan RLA97 (Aa10020004) for gas boiler Electrolux

Also, an interturn short circuit can lead to problems with the fan. Only a specialist can cope with the elimination of this malfunction. Return the stator for repair to replace the winding, or immediately replace the faulty unit with a new device.

Gas boiler chimney diagram

Often, excessive clogging of the coaxial chimney leads to the appearance of various malfunctions in the operation of a gas heating boiler.

Remove the chimney and thoroughly clean all of its components from soot. So you will not only return the previous level of efficiency of the unit, but also significantly increase the efficiency of the boiler.

The boiler can shut down spontaneously for several reasons. This usually happens due to a malfunction of the combustion sensor. This problem, in turn, most often leads to contamination of the gas pipe.

Draft sensor 87 ° C for Thermona boiler

Remove the branch pipe, rinse it thoroughly with water, clean it with a cotton swab and blow it off the remaining moisture. Put the pipe back in place and try to turn on the boiler. If it doesn't help, call the wizard.

No wonder they say: the best repair is prevention. Gas boilers require annual preventive maintenance, which must be carried out before the start of the heating season.

Whenever possible, maintenance should be carried out twice a year, before and after the heating season.

Check all the previously discussed boiler elements for their serviceability. Follow the preventive maintenance recommendations given by the manufacturer in the instructions specific to your boiler. Eliminate any malfunctions that arise in time, if possible.

Remember! A gas boiler is a potentially hazardous equipment. Incorrect use and untimely troubleshooting can lead to irreparable consequences. Therefore, be careful and do not engage in any repair work if you doubt your ability and correctness of action. Otherwise, follow the instructions provided.

Video (click to play).