Installing a gas boiler yourself. Correct installation of a double-circuit gas boiler with your own hands. Two big differences

All other elements can be connected independently. Each boiler has almost identical parts for connecting to communications:

• a coarse filter is installed on the return line of the heating circuit;

• A magnetic filter is a domestic water softener. He makes preparations cold water before heating it in the hot water supply circuit;

• mesh filter;
• gas filter;

• drives are elements threaded connection pipes;

• flexible corrugated hose;

• manometer - a device for measuring pressure;

• thermostat - electronic automatic system to maintain specified parameters;

• coaxial chimney is a chimney that is a substitute for a traditional chimney in modern boilers with forced draft;

• safety valve at 3 bar is mechanical system automatic release of coolant into the atmosphere when pressure rises to critical values;

• the expansion tank is designed to compensate for the rise and fall of hydraulic pressure in the heating system;

• shut-off valves;

• An automatic air vent is designed to remove air from the heating system.

When connected, all elements look like this:

The simplest heating and hot water supply system using a gas double-circuit boiler has the same design as traditional systems:

The boiler is flow-through heating element to provide hot water supply and a closing link in the heating circuit.

If you need to provide a more complex heating system, then a similar scheme can be considered using another example:

The hot water supply circuit remained unchanged, but additional elements appeared in the heating circuit:

• the hydraulic arrow is installed immediately after the boiler. It's simple vertical tank. Its purpose is to ensure constant circulation of water (while reducing coolant flow to consumers), remove air from the heating system, distribute coolant at different temperatures, maintain a temperature difference between the supply and return lines (this required condition normal operation of a gas boiler);
• distribution manifolds on the forward and return lines are needed to evenly distribute the coolant between consumers;
• Individual circulation pumps for each heating circuit allow you to provide your own temperature regime in all rooms.

Gas double-circuit boilers have affordable price and allow you to provide the room with cheap heating and hot water. The use of a gas unit is possible in a heating system of any complexity.

Master of Architecture, graduated from Samara State University of Architecture and Civil Engineering. 11 years of experience in design and construction.

Natural gas is the most convenient and affordable type of fuel for operating heating boilers in private houses. Pipeline supply system gaseous fuel on the burner, simple ignition, control of parameters and stopping make the operation of gas heating installations simple and does not require special training. Possibility of immediate combustion termination when emergency situations provides an increased level of safety during operation installed equipment.

At the same time, there are special requirements for installing a gas boiler in a private house. Their implementation is mandatory for all types of equipment in order to ensure a minimum degree of risk when burning explosive fuel in residential buildings and individual structures.

Requirements for premises and air exchange

An important advantage of a private house, in contrast to city apartments, is the ability to allocate non-residential premises for installation of heating equipment. In current regulatory documents a number of requirements for the size and arrangement of such rooms are given. The main ones:

• a total area of ​​4 m2 or more should ensure that the boiler can be placed at a distance of 350 mm from the outer wall;
• ceiling height of at least 2.5 meters;
• the floor level in the furnace room is not lower than the zero level of the building;
• the width of the entrance door is from 800 mm, and the door should open outward;
• the mandatory presence of a glazed window, the area of ​​which is determined depending on the thermal performance of the gas boiler;
• The lighting standard is set to 0.03 l/m2;
• minimum area sections air channel inlet natural ventilation– 8 cm 2 for each kW of heating unit power.

When organizing the air supply, it is necessary to take into account the amount used for gas combustion and also add three times the air exchange for the volume of the room.

All walls and internal partitions must be built of non-combustible fireproof materials with a fire resistance rating of at least 45 minutes. The layout of the room and the arrangement of ventilation ducts should not contribute to the spread of flame in a fire.

The volume of free space not occupied by installed equipment is standardized depending on the power of the installed boilers:

• for heating units up to 30 kW - less than 7.5 m 3;
• 60 kW – 13.5 m 3 ;
• more than 60 kW – 15 m 3.

Installation of a gas boiler in a private house with a total thermal output of more than 200 kW is prohibited. In this case, the power of one unit should not exceed 100 kW.

Flue gas removal

Channels and pipes designed to remove gas combustion products must ensure normal combustion in the boiler furnace. Due to this:

• the cross-section of the smoke exhaust duct should not be less than the dimensions of the boiler connecting pipe;
• it is allowed to reduce the cross-sectional area of ​​the chimney if the design of the heating unit provides for the forced removal of combustion products and air supply;
• channels can be located inside main walls and partitions of appropriate thickness or be attached to them;
• the material for the manufacture of chimneys must be fireproof and not subject to active corrosion;
• the design of the chimney must include a special hatch for cleaning the channel from soot and a device for draining the resulting condensate;
• the height of the chimney is higher than the ridge of the roof or a line at an angle of 15° when moving away from it.

All butt connections of elements are made airtight and exclude not only the release of combustion products into the premises, but also the possibility of air leaks and a decrease in draft.

Preparatory activities

Preparing to install a gas boiler in a private home begins with studying regulatory requirements, rules for installing a gas boiler in a private house, design solutions on the arrangement of auxiliary equipment, technical characteristics and internal structure of the boiler unit.

To obtain permission to connect a heating boiler to a gas pipeline and supply gas to a residential building, the owner of the building must submit an application to the local gas service, where the request will be reviewed by specialists within a month.

After this, the applicant is given technical conditions for connection or a reasoned refusal before complete elimination existing comments. Installing a gas boiler without obtaining and fulfilling technical conditions is considered illegal and may entail liability for the owner of the house, the level of which is determined by the consequences of the crime.

The design of an individual furnace is developed taking into account all the technical requirements and rules set out in the conditions. The heat loss of the building is calculated and the boiler power is determined taking into account the flow rate hot water for economic needs.

The finished project must be approved by the special supervision service of the gas supply organization. To do this, together with it the following is sent to the regulatory authority:

• technical passport of the boiler;
• manufacturer's instructions for installation and operation of the heating unit;
• a copy of the certificate for its compliance with current regulatory documents.

The next stage of work is to complete the equipment and necessary materials. Here you should pay attention to the compliance connection fittings according to the dimensions and thread pitch of the mating connections of the boiler, pumps, tanks and other equipment provided for by the design solutions.

It is necessary to understand that the furnace equipment is part of the heating system and should not be considered as a separate isolated section of the house.

Installation of boilers in individual houses

The method of placing a heating boiler in a residential building depends on its design and can be floor- or wall-mounted. It should be noted that floor-standing models in most cases exceed the thermal power of wall-mounted heat sources.

In addition, a freer coolant circulation pattern in such devices allows them to be installed for operation in autonomous heating systems with natural circulation.

Installation of floor-standing boilers in a separate combustion room

If it is necessary to install a heat source with a power of more than 32 kW, gas boilers with floor installation are chosen, since the thermal performance of serial mounted models does not exceed the specified value. Developed standard schemes combustion chambers, for private houses, provide for the presence of:

• expansion tank;
• hot water heater for domestic needs;
• capacitive or speed separator;
• distribution comb;
• at least two circulation pumps.

In addition, it is necessary to install emergency discharge lines and safety valves that are triggered when the pressure in the pipelines increases.

Boiler installation work begins with the preparation of brick or concrete foundations not only under it, but also under all the tanks, which, after filling with water, will become quite heavy. After this, the distribution manifolds and pumping units should be assembled with shut-off valves, and fix them on the wall according to the design diagram.

Boiler piping

Place the tanks and boiler on the bases and, if there are mounting holes, secure the position using anchor bolts. Now you can begin work on the chimney installation and installation of pipelines.

One of the circulation pumps is installed on the return line between the boiler and the separator. The second is on the supply line after mixing the coolant flows in the separation column. A safety relief valve must be installed on the heated water outlet line from the boiler, which will protect the installed equipment when pressure increases.

Emergency discharge pipelines must not be connected to household plastic sewers, which may be damaged when boiling water is drained. The material must be metal. A make-up regulator is installed at the water supply connection heating system, which in simple version It is a bypass valve that regulates pressure after itself.

The length of the horizontal section of the chimney at the outlet should not be more than two diameters of the factory pipe. After this, the chimney must be moved to a vertical or inclined position at an angle of at least 30°. If in the unit’s passport data the temperature of the exhaust flue gases exceeds 85°, metal chimneys must be covered with thermal insulation.

The connection of a gas boiler in a private house to the gas pipeline, purging of the fuel line and a test run of gas are carried out by employees of the gas supply organization. These works may be carried out by the installation organization, but only in the presence of a representative of the controlling office.

Installation of wall-mounted boilers

Unlike floor structures, mounted models do not require such complex piping and installation of auxiliary equipment. Circulation pump, expansion tank, heat exchanger for heating domestic hot water and a safety valve are already installed inside the unit body, which in design is a compact mini-furnace.

However, the power of such boilers usually does not exceed 32 kW, which can ensure the operation of a heating system in a residential building up to 300 m2. Moreover, if we take into account the consumption of hot water in double-circuit devices, then the heated area must be reduced by 25-40%. But for small buildings, wall-mounted gas boilers are the most optimal solution to the issue of organizing stable heating operation.

Boiler installation location

There are two types of mounted gas boilers on the market, which differ in the way they supply combustion air and remove flue gases. They are called boilers with atmospheric and closed combustion chambers. In the second case, the design of the unit provides for an axial fan-exhaust fan and a double coaxial chimney. Piping Both types are structurally no different.

The location for installing the boiler is chosen depending on its design. Models with an atmospheric firebox should be mounted as close as possible to the vertical smoke channel running inside the wall. Units with a closed firebox can only be installed on external wall or on the partition adjacent to it in order to be able to withdraw coaxial pipe outside.

Brief installation instructions

Manufacturers include an installation or marking sheet in each package, on which the contours of the boiler are drawn, markings of all connections and installation points for fasteners. Its presence greatly simplifies the work. The installation procedure is as follows:

1. attach the sheet to the wall surface fireproof material thickness of at least 3 mm;
2. a mounting sheet must be glued to the surface of the sheet;
3. Drill holes in the mounting marks and install anchor hanging hooks on which the heating unit will be hung;
4. hang the boiler on the wall;
5. check the gap between the boiler and the wall, if necessary, remove the device and tighten or unscrew the fasteners;
6. Based on the markings on the installation sheet, connect the gas boiler to the heating and hot water supply system;
7. install a flue on the outlet pipe and bring it to the smoke duct or take it outside;
8. connect the boiler to the electrical network through a voltage stabilizer or uninterruptible power supply device;
9. invite gas service workers and, in their presence, connect the unit to the gas pipeline.

Normal operation of heating attachments can only be ensured if there is a stable power supply. Even short-term failures will lead to the boiler stopping and possible damage to the electronic control unit. Therefore, the presence of protection is mandatory.

Rules for operation and maintenance of a gas boiler

Heating equipment must operate at positive air temperatures and normal humidity. Cleanliness and functionality must be checked at least twice a year. ventilation system and chimneys. The main activities during boiler operation must include:

• annual cleaning of all installed filters;
• monitoring the technical serviceability of the control unit;
• inspection of the heat exchanger for the presence of soot;
• checking the tightness of joints and connections of the gas pipeline by soaping;
• cleaning the burner from carbon deposits and dust.

All failed parts should be replaced with new ones, rather than attempting to restore them. A conscientious attitude to the implementation of all necessary technical measures will increase the service life of the equipment and ensure your safety.

Video on the topic

Gas is considered the most cost-effective type of fuel in terms of efficiency. Even if there is no gas main line to the holiday village, many owners country houses They use gas tanks, which from an economic point of view is often more profitable than using other types of fuel. In any case, you need to know the rules for connecting a gas boiler in a private house, which strictly regulate all the nuances of installation and operation of the equipment.

A modern gas boiler with automation is enough a complex system, installation and debugging of which requires specialized knowledge Source sovkalmykia.ru

Is it possible to install the equipment yourself?

In short, the installation of a gas boiler in a private house can be carried out by anyone, but commissioning of the equipment - acceptance and testing must be carried out by specialists from the gas service; connecting a gas boiler in a private house and operating it without their permission is impossible.

The safest thing to do is to have the installation done gas equipment qualified representatives of a specialized organization. Only they can produce necessary work competently, in accordance with the requirements of SNiP, and ensure safe operation of the equipment. In addition, a competent specialist always works under a contract, which specifies who carried out what work, when and what.

Main types of gas boilers

Manufacturers of gas equipment offer customers different types heating boilers running on blue fuel. They are designed for heating any area and, according to the type of installation, are divided into floor and wall.

The first of them are powerful, reliable and durable “flagship models”, designed for installation in houses with above-average square footage. There is only one general drawback of such models - they will have to be equipped with a separate room.

Wall-mounted gas boilers serve as excellent alternative option for a small private house: they do not need a separate room - such devices are compact and versatile. In addition, their installation does not impose increased conditions on bearing capacity walls - you just need a layer of non-flammable material between the boiler and the base.

Requirements for the boiler room in the house

If the boiler output is more than 30 kW, then it must be installed in a separate room. All information on how to install a gas boiler in a private house is given in the SNiP standards, where there are clear requirements for the arrangement of a boiler room for heating equipment powered by fuel combustion.

You can place the boiler room in the attic, in the basement (basement) or simply in a separate room of the house. A mandatory requirement for this is free passage into the room, sufficient illumination and the arrangement of a rigid base.

In addition, installing a gas boiler in a private house requires the following boiler room:

volume not less than 13.5 m³ for boilers with a power of 30-60 kW and over 15 m³ for models with higher productivity;

comfortable access to the equipment.

Properly designed boiler room for a private home Source teploknam.ru

In one hour ventilation should provide threefold air exchange;

walls and ceilings made of non-flammable material;

Important! Heating boilers are located at a distance of at least 0.5 m from flammable surfaces. And the partitions comply with the fire resistance standard RE1 45, that is, they must resist open fire for 45 minutes.

Requirements for a boiler room in a separate building

The advantages of a separate boiler room are increased safety, reduced noise levels and the ability to use the freed up space for other purposes. The disadvantage will be that the heating system will become more expensive, since it will be necessary to install an additional thermally insulated pipeline branch.

At the same time, such requirements to such boiler houses are the following:

separate foundation;

concrete boiler base;

forced ventilation, which should provide three air exchanges within an hour;

fulfillment of requirements regarding sizes boiler room;

installation in one room is allowed no more than two heating devices;

doors should open outwards to the street;

SNiP requirements for the external boiler room of a private house Source karelia-dom.ru

On our website you can find contacts construction companies who offer the service of designing houses and utilities. You can communicate directly with representatives by visiting the “Low-Rise Country” exhibition of houses.

wall surfaces and ceilings are made of non-flammable material;

Availability transom windows for daylighting and emergency ventilation - the area of ​​the window opening must be suitable for the volume of the room (0.03 m2 per 1 m³);

Availability chimney, if it is needed for the device being installed (for wall-mounted devices with a capacity of less than 30 kW, the coaxial pipe is allowed to be output through the wall).

Also connected to the boiler sewage pipe so that water can be drained from the system when replacing it.

Basic requirements for smoke exhaust and ventilation ducts

The room where the gas boiler is located must meet necessary requirements, while not only the width and length of the room is regulated according to the power of the equipment, but also the size to the ceiling, which must be at least 2 m.

It is mandatory to install in the boiler room ventilation duct, for this purpose a hole with a cross-section of at least 0.02 m 2 is provided.

The location of gas boilers corresponds to the installation conditions of the chimney. In this case, the parameters of the latter (height, channel area) in relation to the installed gas equipment must be strictly observed.

The size of the internal cross-section of the smoke outlet pipe is made the same or slightly larger than that of the device. According to NPB-98, inside the chimney opening the air flow speed should be 15-20 m/sec, and such draft can be ensured with a chimney pipe height of about 5 meters.

Important! Smoke must not be vented into a duct provided for ventilation. In boiler rooms that have a standard hood, air exchange should take place due to the incoming flow from outside the room and, partially, as a result of its penetration from adjacent rooms.

Gas appliance in a private home: requirements and main installation steps

To properly install the unit, you must first study the regulatory documentation and rules for performing this work. They talk about the features of installing gas appliances for the heating system.

Whatever type of boiler would have to be installed, it is imperative to comply with the requirements of certain norms and rules, such as:

SNiP 41-01-2003 about heating, ventilation and air conditioning.

SNiP 42-01-2002 about the gas distribution system.

SNiP 21-01-97 about fire safety.

SNiP 2.04.08-87 about the installation of boiler rooms.

The provisions of SNiP contain all necessary information for installation and startup of a gas boiler Source optolov.ru

In relation to these conditions, to install a gas boiler in the house, you must first obtain normative act, which gives permission to carry out work on connecting gas appliances. And to purchase specifications, you must submit an application to the local gas service, to which a response must be given within a month.

It is important to know! Technical specifications are the official permission to carry out installation work gas appliance. Unauthorized installation gas heater without specifications is illegal and unsafe for the homeowner.

Boiler installation

After the development of project documentation and receipt of an act with permission to install a gas boiler, its installation is carried out, which is carried out in several stages:

Preparing a solid foundation. A concrete screed is poured onto the floor, or a sheet of metal is placed. The boiler must be installed strictly parallel to the floor.

Chimney connection and checking traction.

Accession heating system pipes. In this case, a fine filter must be installed, which is usually placed in the return pipeline in front of the boiler. And on both sides of the filter element there are ball valves.

When installing a double-circuit gas boiler in a private house, it is necessary connect it to the water supply. It is advisable to insert the supply pipe from the top, and the exit pipe from the bottom.

Connection to the gas pipeline. This can only be done by a gas service specialist.

Video description

The installation of a gas boiler is clearly shown in the video:

That's it necessary work completed. The exception is boilers with a closed combustion chamber. These devices are equipped electronically controlled, and they are launched simultaneously with filling the system, since without creating a certain pressure in expansion tank, the boiler will not work.

Operating rules

For safe use gas, the connection diagram for a gas boiler in a private house must be followed. In addition, the following must be fulfilled conditions:

Behindstart operate the boiler only at normal humidity.

Control technical condition gas service specialists at least once a year.

Filter installation fine cleaning on the return pipeline of the heating system.

Natural or artificial ventilation in the boiler room.

Correspondence traction in the chimney pipe requirements (10-20 m/sec).

In the event of a leak, promptly report to the emergency gas service.

Video description

For information about the operating features of gas boilers, watch the video:

Maintenance

Preventive measures for routine inspection of gas boilers include the following: types of jobs:

Checking taps external and internal gas pipelines (disassembly, application of lubricant).

Inspection of thermostats on floor boilers.

Flushing or replacement filter elements.

Injector inspection, checking the tightness of the door, the operation of the igniter on floor-standing devices.

Traction control in the chimney.

Check in winter time naledi at the coaxial pipe of wall-mounted boilers.

All components that have been subject to wear during operation must be replaced.

On a note! After completion of the repair and before starting the heating system, the gas service worker checks the tightness of all connections in the line. Usually a soap solution is used for this.

A competent preventive inspection will not only increase the service life of the equipment in use, but will also reduce gas consumption.

Conclusion

At first glance, installing gas boilers in a private home is not the most difficult; the requirements for compliance with standards and safety regulations are high. Installation of a heating system with a gas boiler requires knowledge of the relevant norms and regulations, and the final check and connection should be carried out exclusively by gas service specialists. Trust the professionals and then the gas boiler will serve you faithfully and provide warmth and comfort in your home.

You have purchased a new gas boiler for your private home and it’s time to take its place in the furnace room. To do this, you can hire a specialized company or contact the appropriate service. But the cost of installation in this case will significantly hit your wallet, while there is an opportunity to reduce the cost of the process. Yes, some operations can only be performed by licensed organizations, but this is only half the work; the rest can be handled independently. Here we will talk about how to install a gas boiler in a private house from start to finish.

Where to begin?

Since the installation of new gas-using equipment requires compliance with certain rules, it is worth ordering all work that requires a license from the gas service:

• Issuance of technical specifications.
• Development of project documentation.
• Work on connecting to the natural gas pipeline.

You can complete the rest of the steps yourself. First, you need to obtain technical conditions for installing gas equipment from the gas service. Check them out or make a copy and immediately order project documentation from them. When it is ready, it will need to be approved by the gas service. As you might guess, this procedure is a pure formality; after its completion, a team will come to your home and install the gas boiler in terms of its connection to the fuel line, about which a corresponding report will be drawn up.

All that remains for you to do is to complete the piping and connection to the heating system and laying electrical networks. Here you will have the opportunity to save money, either by doing everything yourself or with the help of familiar plumbers. The last stage is the final paperwork.

It's just short description one of possible algorithms solving the problem, but in fact, not everything is so simple, because gas boilers must be installed in compliance with regulatory requirements; it would not hurt to familiarize yourself with them at the stage of choosing a heat generator.

Requirements for boiler installation

First of all, it is necessary to take into account all the requirements for the room where the heat source is supposed to be placed. The options are:

• kitchen;
• a room inside the house, adjacent to one of the external walls and having windows;
• premises in the basement or basement;
• in the outer building.

In the kitchen, installation standards allow you to place a floor or wall mounted unit heating capacity up to 60 kW. Equipment with ratings from 60 to 150 kW can be installed in a separate room on any floor, and from 150 to 350 kW - only on the first or ground floor, in the basement or outbuilding. At the same time, it is important to observe the dimensions of a separate room or an attached part; they cannot be smaller than specified in the standards. The minimum standard height of such a room is 2.5 m for any power within the specified limits.

Note. The thermal power values ​​specified in the standards and affecting the installation conditions of the boiler are the total power of all units in the boiler room, including those working for the needs of domestic hot water.

For heat generators with a capacity of up to 150 kW, in accordance with the standards, the smallest volume of the room for installing a gas boiler is 15 m3, in addition, for each kW of water heating equipment, 0.2 m3 is added to this volume. If the total indicator of all units exceeds 150 kW, then the dimensions of the room are not standardized. But the installation rules apply and safe operation boilers, according to which it is necessary to maintain technological gaps between the units and the walls of the room; they are adopted for reasons of ease of maintenance and access to all systems in the boiler room. The dimensions of the passages in accordance with the rules are as follows:

• From the protruding part of the gas burner device to the wall on the front side of the heat generator - at least 1 m.
• If the operating instructions for the unit say that it needs to be serviced from the side or rear, then you will have to maintain a passage width of 1.5 m, but when there is no such entry, but you need to provide access to other equipment or fittings, then it is enough to make the clearance 700 mm. In other cases, installation requirements are stated in the product documents from the manufacturer.
• If you plan to install 2 heat sources in the furnace room, then you should not place them opposite each other, since you will have to provide a clearance of at least 2 m between the protruding parts of the burners.
• Nothing should be laid through passages at a height lower than 2 m.

For the kitchen, where it is allowed to place not too powerful heating equipment(up to 60 kW), not the most strict requirements for installation of gas boilers. You just need to comply with the volume standard given above, and also ensure air exchange in the amount of 3 times in 1 hour. Additionally required to submit supply air for fuel combustion, its consumption for each unit is indicated in technical specifications. This standard applies to all types of boiler houses.

Note. For heat generators with a closed chamber, the installation standards for gas boilers do not force the supply of an air mixture for combustion, since they take air directly from the street through coaxial chimney, which will be discussed below.

The regulatory documents propose organizing ventilation for the boiler in the kitchen using an exhaust shaft and a supply grille built into the front door. The flow area of ​​this grid is also standardized; its area cannot be less than 0.025 m2. In the same way, you can arrange air exchange in individual combustion chambers. Feeding difficulties fresh air may occur in basements or basement floors, it is possible that for compliance technical specifications You will need to install a special supply fan.

In boiler rooms located on the first, ground floor or in an extension, window openings with a glazing area of ​​at least 0.03 m2 are needed for each cubic meter of room volume. The attached premises also have requirements for fire resistance of walls, a separate foundation and entrance doors. In addition, the extension cannot be built on the front facade of the building, and during construction it is necessary to retreat 1 m horizontally from the nearest window or door.

It should be noted that the requirements for a gas boiler located in wooden house, are identical to the standards for buildings made of other materials, that is, the rules for installing boiler rooms are the same for all buildings.

Installation work for boiler installation

When a suitable room has been selected and work has been done for it project documentation, you can begin to manually install the heat generator in place. To do this, you will need a connection diagram for a gas boiler in a private house, which must be present in the project. It shows the installation location, the distance to all enclosing structures and technical requirements to the production of work.

Often, the installation of floor-standing gas boilers requires the construction of a foundation. In many cases it is not needed, for example, when the room has a high-quality screed and the weight of the unit does not exceed 50 kg. If the mass of the equipment is greater than this value, then you will have to prepare the foundation. To do this, you need to destroy the existing screed, pour a cushion of crushed stone and compact it thoroughly. Then tie a mesh of periodic profile reinforcement with a diameter of 8 to 12 mm, lay it on the finished base and fill it with concrete.

In order to withstand the technology of installing gas boilers, the dimensions of the foundation in plan should be 50 mm larger than the dimensions of the equipment, and in height it should protrude 50-100 mm above the level of the screed. Complete hardening concrete slab will take you at least 2 weeks, this must be taken into account when planning the work.

Next, a fireproof asbestos or metal gasket is placed on top of the foundation and a heat generator is placed on it, adjusting the legs of the unit so as to maintain a clear horizontal line. After this, using the gas boiler installation diagram, it is connected to all utility networks, except the fuel line. This connection, as mentioned above, is carried out by a licensed organization.

To install a wall-mounted gas boiler in a private house, you do not need a foundation, but a solid foundation in the form of an outer wall that can support the weight of the unit. First of all, markings are made on it, showing where the heat generator itself will be suspended and where the chimney pipe will exit. Then, using a hammer drill, a through hole is drilled in this place, into which a metal sleeve is inserted.

There is no particular difficulty in hanging a wall-mounted gas boiler. If the action takes place in the kitchen of an apartment or house, it is necessary to take measures to protect the furniture from debris and then begin the fastening process. Difficulties may arise when installing heavy units, whose power reaches 120 kW; here you cannot do without an assistant.

Note. When a wall-hung boiler is attached to a wall made of flammable material, a special bracket must be made to allow a clearance of 45 mm between the wall surface and the rear panel of the heater. Also, a sheet of non-flammable material should be attached to the wall, acting as a protective screen.

The last thing to do is piping the gas boiler and installing the chimney. Here it is necessary to compactly place taps and other fittings under the body of the heat generator so that everything looks neat and at the same time it is possible to disassemble or change any element. Therefore, when the heating circuit in a house is made of polypropylene pipes, then it is better to use bronze taps and a mud pan, and plastic pipes connect via threaded adapters. In this regard, several more difficult installation double-circuit gas boiler, where you will need to lay pipes for hot water supply and correctly connect them to the appropriate pipes.

Requirements for chimneys

In essence, the requirements for the chimneys of floor-standing and wall-mounted gas boilers are identical; the difference may be in the design of the flue itself. It depends on the design of the heat source:

• Heat generators with an open combustion chamber take air from the room and exhaust combustion products through a traditional chimney with natural draft.
• Units equipped with a closed chamber draw in air from the street forcibly using a fan through a double-walled pipe, which also serves as a flue (coaxial chimney).

A traditional chimney for a gas boiler is installed in the thickness of the wall or suspended from the outside of the building. The cross-section of the outlet pipe from the unit determines the diameter of the entire chimney; it should be the same size, or better yet, 20-50 mm larger. The horizontal section connecting the boiler to chimney, ideally performed with a length of 1 m, the maximum permissible length is 2 m.

Below the insertion point, a door is required for cleaning and internal inspection, and the blind end vertical pipe equipped with a condensate drain system. When installing the chimney of a gas boiler, you must remember that it is not allowed to cover the pipe outlet with umbrellas, deflectors, weather vanes, and so on. In accordance with the regulations, only a narrowing nozzle can be installed.

Unlike traditional exhaust ducts for combustion products, it is much easier to install a double-walled chimney for heat generators with a closed chamber. Having made a hole of the required diameter in the outer wall and built a metal sleeve into it, a coaxial chimney is installed, which is a horizontal double-walled pipe of a certain length. The only condition that must be met is a slight slope towards the smoke exit. This is done to prevent condensate formed in the air duct from flowing into the boiler.

Conclusion

So, installing and piping the boiler with your own hands is not an easy task, but it is quite feasible. It will take a lot of time and patience to complete all the documentation, but you yourself installation work will take a maximum of 3-4 days, or even less. It is important to prepare well and purchase in advance all the missing elements of the strapping scheme, as well as fasteners.