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Gas boiler of low power 3 5 kW. Gas boiler for heating a private house. The best inexpensive boilers

The desire of the homeowner to purchase the most economical gas boiler is quite understandable - the cost of fuel is constantly rising, so the creation effective system will significantly reduce the cost of heating the house and preparing water for hot water supply.

Variety of boiler brands

What criteria should be used to evaluate a gas boiler for a home when purchasing equipment for a local heating system, you will learn from this article.

Efficiency of gas boilers

First of all, it is necessary to understand how the thermal energy of the burning fuel is distributed. The energy carrier for a gas boiler is natural or liquefied gas, while the calorific value of any of these types of fuel must be within the regulatory requirements - only in this case the heating unit will be able to generate heat in accordance with its passport indicators.

The calorific value of gas is a value indicating how much heat is released during the combustion of a unit volume of fuel. The heating unit directs the bulk of this energy to heat the coolant in the building system, i.e. for home heating. The greater the percentage of energy will be used to solve this problem, the better.

The efficiency of a heat generator (expressed as a percentage) is an indicator of exactly what part of the heat of combustion of the energy carrier is used to heat the house. The higher the efficiency, the more efficiently the fuel is used, the less it is required to maintain operation. heating system in normal mode.

Efficiency and economy depend on each other

In turn, the more fully the fuel is used and the lower its consumption, the less money is spent on the purchase of an energy carrier. Thus, the efficiency of the boiler is directly related to its efficiency.

During the combustion of gaseous fuels under normal conditions and with a sufficient supply of oxygen, CO 2 (carbon dioxide, also known as carbon dioxide) and H 2 O (water) are released.

Thermal energy obtained as a result of gas combustion is consumed :

  • for heating the coolant;
  • on the evaporation of water vapor obtained during combustion;
  • goes down the chimney along with flue gases.

The most economical gas boilers differ from the rest in that the absolute maximum of thermal energy is directed to heating the house, while losses in the last two items of the list are minimized.

Combustion chambers and burners

The efficiency of a heat generator operating on natural or liquefied gas usually is 90-95%, for premium units this figure can reach 98%.

To a certain extent, the efficiency of the device depends on the characteristics of the gas burner that the boiler is equipped with.

When choosing a heat source, you should pay attention to the type of combustion chamber of the unit - it can be open and closed:

  • air enters the open combustion chamber from the room;
  • air enters the closed chamber from the street through a coaxial chimney, and is blown by a fan.

Obviously, in the second case, the combustion process takes place at a higher oxygen supply, due to which the fuel burns out almost completely, giving maximum thermal energy. This not only reduces the amount of flue gases, but also increases the efficiency of the boiler.

The burners themselves are of two types - with step and smooth adjustment, thanks to which you can change the power of the unit. The most inexpensive units are equipped with a single-stage or two-stage burner.

If the gas boiler is equipped with an electronically controlled modulating burner, it is able to save energy as much as possible. This is due to the fact that the degree of heating of the coolant is smoothly regulated depending on the real needs of the house for heat. This is one of the most important conditions for reducing fuel costs during the heating season.

Attention! It makes sense to install an efficient and reliable gas unit with a modular burner and forced air supply to the furnace as part of a heating system with individual microclimate control in each room. This requires serious investments at the stage of purchase and installation of equipment, but in the future the system pays for itself due to serious energy savings.

A little more about the efficiency of boiler plants

This indicator depends not only on the characteristics of the furnace and burner device, but also on how thermal energy is transferred.

At the first stage, the heat received in the combustion chamber heats the water jacket of the unit. Then the flue gases and the remaining thermal energy pass through a heat exchanger made of steel or cast iron, due to which another part of the thermal energy is spent on heating water. The remaining heat, together with flue gases, escapes into the atmosphere through the chimney.

If you measure the flue gas temperature at the outlet of the pipe, you can evaluate the efficiency of boiler equipment. In a heater with low efficiency, the temperature of the gases at the outlet pipe reaches (or even exceeds) 200 degrees - this means that a significant part of the thermal energy is irretrievably lost, that is, a decent percentage of the fuel is wasted. Gas heating boilers can be considered quite efficient if the temperature of the flue gases at the outlet of the pipe does not exceed 150 degrees. For an economical boiler, this figure will be about 100 degrees.

Outgoing flue gas parameters

The lowest temperature for combustion products is for condensing gas boilers. This is achieved due to the design features of the unit, where a system is provided for the selection of heat obtained during the vaporization of water. As mentioned above, water is released during the combustion of gas fuel, and then evaporates - and part of the received thermal energy is spent on this evaporation. Condensation colas differ from classical gas units in that they take this energy back by condensing water vapor.

The condensing model is equipped with a cylindrical type burner, which is mounted inside a stainless steel heat exchanger, made in the form of a coil with coils located very close to each other. The coolant circulates through the coil. The water vapor generated during chemical reaction combustion, passes through the coil, since it has no other way, and condenses on its surface. In the process of condensation, the steam gives off heat to the coil.

When determining which gas boiler is the most economical, you should pay attention to condensing boilers, since the temperature of the combustion products at the outlet of the pipe is the lowest - only 45-70 degrees, while the efficiency is 98%.

What to choose: condensing or conventional boiler?

As already mentioned, the efficiency and reliability of the condensing boiler is beyond doubt. But it should be noted that sellers of such equipment often mislead buyers by declaring that the efficiency of a condensing heat generator is more than 100%. They add to the base figure of 98% "efficiency percentages" obtained by condensing water vapor - i.e. thermal energy that the unit takes back, initially spending on converting water into steam.

A photo of a condensing boiler

Any literate person who studied physics at school knows that the efficiency of equipment cannot exceed 100%. The condensing unit is able to minimize heat loss, but cannot increase the amount of heat energy obtained by burning gas. Thus, the real efficiency of the condensing heat generator does not exceed 98%.

However, when choosing a gas-fired heating unit, it is important to consider the following :

  • condensing boilers are more economical than conventional ones, but are significantly more expensive due to their more complex design;
  • maintenance of a traditional gas unit (flushing the heat exchanger, etc.) can be done by hand, technically there is nothing complicated in this, and certified specialists are required to clean the condensing boiler.

If you are looking for an economical gas boiler among conventional units, it is important to understand that savings when buying equipment in the future can result in increased repair and maintenance costs.

Don't Forget to Estimate Installation Costs .

For example, a floor-standing gas boiler with an open combustion chamber requires installation in a dedicated room with a fire-resistant finish. In addition, a foundation and a vertical chimney are mounted for it.

And the model with closed camera combustion can be installed in any convenient place and lead the chimney through the wall.

Compact gas boilers are hung on the wall and take up a minimum of space - this is the most convenient option.

Please note: it makes sense to opt for a non-volatile boiler only if it is not possible to provide power to the equipment. Such models have a relatively low cost, but do not make it possible to save fuel.

How to do right choice?

Compare the following indicators :

  • Efficiency of the unit (indicated by the manufacturer in the product passport);
  • temperature level of combustion products at the outlet;
  • design features of the heat exchanger (the more turns, the more heat energy the flue gases will have time to give off);
  • the quality of the thermal insulation of the water jacket of the boiler (it is important that there are no unnecessary heat losses);
  • type of combustion chamber;
  • burner type (smooth adjustment is the ability to switch the boiler to the most economical mode of operation relative to specific conditions).

The installed heating boiler for a private house must be properly adjusted, this must be done by specialists. Practice shows that it is not worth further saving on inviting experienced professionals to adjust the heating unit - even the slightest deviations from the optimal modes of operation of the nodes lead to the fact that the boiler becomes less efficient and more fuel is spent.

The choice you made will not disappoint you if you take into account all the recommendations. But it should be understood that an economical boiler will meet expectations only if the house is well insulated, selected best option heating system, fuel with the correct characteristics is used.

No matter how high the performance of the boiler unit, it requires regular preventive cleaning - accumulated pollution reduces the power of the boiler and provokes excessive fuel consumption.


How to choose an economical gas boiler for heating a private house


How to make the right choice of an economical and efficient boiler for heating a private house. Which gas boilers are practical and reliable to use.

Gas boiler for heating a private house is not only a necessity, but one of the main elements comfortable living, therefore, the choice must be approached consciously at the stage of designing the entire system as a whole. Market heating equipment does not stand still and is constantly developing and the result of fierce competition is the presence of the widest choice of boilers of various brands, configurations and modifications. Unlike owners of city apartments, who most often receive a boiler after the fact, the owner of a private house has the opportunity to choose a unit at almost any stage of designing his house.

From the author: the purpose of this article is to get acquainted with modern heating technology, its main differences, variety and applicability. We are not representatives of any of the boiler manufacturers, but we are engaged in diagnostics and repair of electronics of gas units and we will try to make this review as practical and not biased as possible.

Criteria for choosing a gas boiler

One of the main criteria for choosing a gas boiler is the required power and the need for hot water at home. Ideally, the required power of the boiler is selected based on the thermal calculation of the building that will be heated by it. In the process of thermal calculation, the heat losses of the premises, the number of windows, doorways, ceiling height, wall materials and characteristics of the selected thermal insulation.

There is an opinion that it is possible to select the power of the unit at the rate of 1 kW per 10 square meters area, but this value is rather arbitrary. Modern thermal insulation materials, plastic windows and insulated doors significantly increase the energy efficiency class of buildings, and this figure can be reduced by 20-30%.

A strong overestimation of the boiler power can lead to a decrease in its efficiency. Modern gas boilers allow you to adjust the power in a fairly wide range, but it should be borne in mind that the maximum efficiency and economy of the boiler will be achieved when it operates at rated power. Continuous operation of the boiler

the lower limit of power reduces the efficiency of the unit by about 12-15%. Information on the value of efficiency in different modes of operation, as a rule, is indicated in the passport or instructions for the device. Overstating the power of the boiler is also fraught with too frequent switching on and off of the device, which negatively affects executive mechanisms and electronics.

When choosing power, some experts recommend taking into account the need for hot water preparation and increasing the power by 20%, or even twice. Naturally, when choosing a gas boiler for heating a private house, it is assumed that residents will also need hot water, but it will be more correct to be guided not by power, but by the number of hot water points and their distance from the boiler room.

Often the final power and type of boiler is selected based on the needs for hot water preparation.

Depending on this criterion, there may be several options:

    double-circuit gas boiler

    boiler with built-in boiler

    single-circuit boiler and boiler indirect heating

Double-circuit gas boiler

Double-circuit gas boilers are designed to heat the coolant in the heating system and, if necessary, prepare hot water, i.e. they have two independent circuits. Depending on the type of boiler, double-circuit models can be with one heat exchanger (primary) and with two additional plate heat exchangers for preparing hot water. When choosing such a boiler, you should pay attention to the performance of the boiler in hot water mode. On average, the water consumption of one point of water parsing at a comfortable pressure and average pressure will be about 8-10 liters per minute.

Based on this, for example, a 24 kW double-circuit boiler will be able to provide approximately 2 points of water analysis, because the performance of the heat exchanger in DHW mode in most cases will be 14-15 liters per minute. And such productivity will be at a temperature delta of 25 degrees, at a temperature delta of 35 degrees this value will be significantly less - in the region of 10 liters per minute. Delta is the difference between the cold water temperature and the required heating temperature. Comfort temperature DHW is about 40 degrees, therefore, at an incoming cold water temperature of about 5 degrees (in winter period) - the delta will just be 35. For example, we present these characteristics for some of the most famous models:

With an increase in the power of the boiler, these figures will not increase significantly. For 32-36 kW models, this is approximately 15-16 l / min, and for 38-40 kW, 18-19 l / min. Therefore, it is obvious that a double-circuit boiler with a secondary heat exchanger can be considered mainly for small private houses or apartments up to 120 square meters with two, maximum three points of water analysis. Double-circuit boilers are separate devices and are not designed to work together with boilers.

Summing up, we can distinguish the following features of dual-circuit models:

    versatility (both heating and hot water at the same time)

    dimensions (can be mounted in a kitchen cabinet)

    ease of installation and operation

    lower value (cost) of initial costs

Boiler with built-in small volume boiler

Such boilers have some advantages compared to typical double-circuit boilers: instead of a flow-through heat exchanger, a small boiler capacity is installed (usually 40-60 liters) and this means that there is always a small supply of hot water. Firstly, residents practically do not need to wait for the initial water heating. Secondly, the boiler will turn on less often - it happens that it is necessary to briefly open the tap to rinse the cup. The double-circuit boiler in this case will turn on and will heat the water at full power, the option with a built-in boiler will turn on only when the temperature of the spare water drops below the set one. Fewer start-ups - longer service life of actuators.

For example: the Ariston CLAS B EVO 24 FF model (built-in tank of 40 liters) already has a DHW capacity of 16 liters per minute at a delta of 35 degrees and 19 liters per minute at a delta of 30 degrees 10 minutes after switching on!

Obviously, such boilers have a greater degree of comfort, but are significantly more expensive. Also, they are free from the problem of scale formation, that is, they are less demanding on water quality. When choosing a boiler for a private house, you should pay attention to the performance in hot water mode and ease of maintenance.


Single-circuit boiler and indirect heating boiler

An indirect heating boiler is a water storage tank that does not have its own heating element, and is heated by external sources (for example, a boiler or solar panels). According to many experts, the use of a single-circuit boiler and a boiler in the heating circuit is most preferable. From the previous version, such a scheme differs in the volume of the boiler itself in the direction of increase. The boiler is selected based on the needs of the residents of a private house in hot water. There are various techniques, calculators is a topic for a separate review. Individually, it is necessary to determine the maximum possible one-time water consumption, for example, in the morning hours, and select a container of the required volume. The performance of the boiler will depend on the capacity of the boiler, because the capacity of the boiler itself is limited by the capacity of its coil. The volume of the boiler is selected from the peak values ​​​​of water consumption. If averaged, the following recommendations can be made: up to 80 liters for a family of 1-2 people, up to 150 liters for a family of 3-4 people, and from 200 liters for families of more than 5 people. In non-standard cases, it is necessary to carry out design calculations.

Thus, we get the following advantages of using a boiler:

    constant supply of hot water ( maximum comfort)

    lower hydraulic resistance compared to plate heat exchanger

    reduction in the number of boiler starts

    reduced water consumption (no need to drain water while waiting for heating)

    no scale formation (does not cancel regular maintenance)

Some manufacturers of heating equipment have ready-made boiler + boiler options that are installed in a single system.

So, in the end - we select the boiler according to the heat losses of the house, the boiler - according to the needs for the amount of hot water.



In addition to the main operational characteristics, boilers have a number of other differences: the material of manufacture and the type of heat exchanger, the type of combustion chamber, and the method of installation.

According to the installation method, floor and wall boilers are distinguished. Wall mounted boilers differ in compact size, light weight and versatility, they are used when there is no separate room for installing a gas boiler. Floor models are equipped with cast iron heat exchangers (therefore, they are heavy) and require certain requirements from the room during installation. Distinctive feature of such boilers is their high reliability. The cast iron heat exchanger is highly resistant to corrosion and has a long service life. Among the shortcomings - fragility and heavy weight.

Heat exchangers of wall-mounted boilers can be made of steel, copper, aluminum alloy or stainless steel. Steel heat exchangers are the cheapest and have a number of disadvantages, such as lower efficiency, a tendency to deformation and have a shorter service life. Copper heat exchangers have significantly higher thermal conductivity, corrosion resistance and lighter weight.

Bithermic heat exchanger

Worth considering separately design feature gas boilers with bithermic heat exchanger. In “bithermics”, heating of the heating coolant and running water takes place in a single primary bithermic heat exchanger (there is no secondary one). When the boiler needs to heat the heating system, the circulation pump turns on; when DHW heating is required, the pump turns off and all power is transferred to the flowing in the same place tap water. The heat exchanger itself is a pipe-in-pipe design (one is heating, the other is hot water). The advantage is low cost, but an important necessity is the water treatment of the water passing through the heat exchanger. Limescale, which is actively formed on the walls during high temperatures operation can significantly shorten the service life.


Atmospheric and turbocharged gas boilers

According to the method of removing combustion products, gas boilers are divided into atmospheric, where smoke is removed from the combustion chamber due to natural draft in the chimney, and turbocharged, in which combustion products are removed forcibly by means of a fan.

Gas boilers with a fan are more expensive, but more economical and have higher efficiency. To install such a boiler, a classic chimney device is not required, it is enough to use coaxial chimney(pipe in pipe), in which air is supplied and removed through one common pipe, which can be taken out of the room through the wall.

Modern fans with adjustable speed allow you to achieve significant savings and, together with a modulated gas burner, adjust the boiler power in a very wide range, as well as get high efficiency on modes low power.


Condensing boilers

All roughly represent the process of heat transfer in a conventional gas boiler: the heat exchanger is located directly above the burner and when the gas is burned, heat is transferred to the coolant. During the combustion of the gas-air mixture, the formation of carbon dioxide, water and heat is released. The rest of the heat that the heat exchanger did not have time to accept goes into the chimney, while the temperature of the flue gases can be from 140 to 170 degrees.

With such a scheme a large number of The heat just escapes into the chimney. This is due to the fact that the combustion products contain approximately 10% of water in the gaseous state, i.e. in the form of steam and manufacturers are trying in every possible way to avoid the condensation of this steam inside the boiler or chimney. The layout of a traditional boiler is designed to prevent the formation of condensate, because condensate is water only in a simplified form. In reality, combustion products contain harmful impurities, which form an aggressive mixture of acids (nitric, sulfuric, coal), which lead to rapid wear of the boiler elements.

The process of condensate formation begins when the combustion products are cooled to about 55-57 degrees. Therefore, the solution for extracting additional heat is to cool the combustion products to the conditions for the formation of condensate inside the boiler and control this process. For maximum heat transfer to the heat carrier, a large area of ​​​​the heat exchanger and the creation of conditions for the formation of condensate inside this heat exchanger are required. In addition, the condensate, cooling down, gives additional heat, which, in fact, is transferred to the coolant, flowing down the walls. That is why marketers often indicate the efficiency of such boilers as more than 100%, adding to the efficiency of a traditional boiler the effect of heat transfer by condensate.

Example: Baxi LUNA DUO-TEC 1.24 GA. The maximum power is 24.7 kW, and the minimum power is only 3.7 kW!!!

In addition to the efficiency of heat removal, condensing boilers can regulate power over a very wide range. This is especially true in the middle lane, where the average annual temperature ranges from 0 to 5 degrees. Therefore, such a boiler will be much more economical than the traditional one in the off-season, when the nominal power of the boiler is not required.


In addition to all the advantages, it is worth noting that in order to obtain the maximum capabilities of a condensing boiler, low temperature regime work (supply temperature less than 50 degrees), and this is not always possible. Since the boiler, in fact, is additionally a condensate generator, it must be disposed of under conditions country house with the use of septic tanks - this will have to be taken care of additionally.

In a country house, insects can also become a real problem for such a boiler. The temperature of the exhaust gases is low and therefore attracts insects, and in the case of a coaxial chimney, and x will be continuously sucked into the combustion chamber.

Conclusion

In this review, we have analyzed the main differences gas installations presented on the market, considered typical schemes applicability. Choosing a gas boiler can be a difficult task, which one to choose - Ariston, BAXI, Vaillant or Protherm? Let's give some advice.

    Choose boilers of popular brands, widely distributed in the market of a particular region. The purchase of products from little-known manufacturers can lead to a limitation of the life of the boiler until the first breakdown.

    Pay attention to the materials and manufacturers of the main components of the boiler (hydraulic group, circulation pump, heat exchanger). Preference should be given to well-known world brands and durable manufacturing materials.

    Expansion tank. It is worth looking at whether the volume of the built-in expansion tank will be sufficient for your conditions, because in different boilers of the same power it can differ in the range from 6 to 10 liters. If the heating system provides its own expansion tank, then the recommendation can be neglected.

    Be sure to evaluate the cost of ownership of the boiler and the availability of service and spare parts. You can compare prices for the main components: heat exchanger, electronic board, fan and others. In different regions, the availability of spare parts may be different, so you should give preference to the most common brands, with which in the event of a breakdown, for example, during the heating season, there will be no problems.

    When choosing, compare technical equipment different models: the presence of self-diagnosis, anti-freeze, post-circulation functions, power adjustment ranges, the presence of a warm floor mode (if necessary) and the ability to connect programming options and weather-dependent automation.

    In the case of choosing a single-circuit boiler for antifreeze as a coolant, specify the possibility of its use. Some manufacturers prohibit the use of antifreeze in their boilers.

    Be sure to read the terms of the product warranty. In some cases, the warranty can be calculated from the date of manufacture of the product and if you are sold a boiler that has been in storage for two years, you will lose the lion's share of the warranty period.

    As for the reviews, we do not recommend using them as the ultimate truth. The history of equipment operation may be different and depend on specific conditions, region, water hardness, power quality, literacy of the designer and installer. Some people take care of things, observe intervals Maintenance and operating rules, others believe that you can not approach the boiler for 10 years and everything should work. On the Internet, you can often find overtly custom reviews or reviews written for search engines, so they are often biased and carry absolutely no value. A gas boiler has long been no longer a luxury and is used everywhere, therefore, it is better to take advantage of the reviews of the owners, who are likely to be found in the immediate vicinity.

We hope that this material will help you in choosing a gas boiler for heating a private house, we also recommend watching a video with recommendations from professionals.


Manufacturer : Viessmann Werke GmbH & Co. kg,

Viessmannstraße 1 - 35108 Allendorf (Eder), Germany

Wall

gas heating boiler

VITOPEND 100- W

Type:WH1 D

· Low-temperature single-circuit/double-circuit gas heating boiler.

· Place of installation: wall-mounted.

· Modulated automatic atmospheric burner.

· Open and closed combustion chamber.

· Programmable heat generation with constant and weather-dependent heat carrier temperature.

Full automation of all processes.

· Application: heating and hot water supply.

· Type of combustion and exhaust gases: natural (atmospheric) and forced (turbo).

· Nominal thermal power: from 10.5 to 31 kW.

Modification of wall mounted gas boilers VITOPEND 100-W, type WH1D

Table number 1.

Wall-mounted gas-fired single-circuit boiler Viessmann VITOPEND 100-W, type WH1D

Thermal power, kW

24 .8

24

24 .8

24

Boiler type

single-loop

double-circuit

The combustion chamber

closed

open

closed

open

closed

open

WH1D274

WH1D277

WH1D262

WH1D2 68

WH1D2 63

WH1D2 69

WH1D275

WH1D278

WH1D2 64

WH1D2 70

WH1D2 65

WH1D27 1

WH1D276

WH1D279

WH1D2 66

WH1D27 2

WH1D27 3

Purpose and scope

Low power low temperature hot water boilers Viessmann Vitopend 100-W WH1D with an atmospheric modulating burner are designed and recommended by the manufacturer to provide individual heating and hot water preparation. Scope of single / double-circuit gas wall-mounted boilers Viessmann Vitopend 100-W - the main source of the system autonomous heating private residential buildings and other premises, small in area and building volume.

According to the purpose, the Vitopend 100-W single/double circuit hot water boiler can only be installed and operated in closed heating systems with forced circulation of the coolant and taking into account the relevant installation, service and operation instructions in accordance with Russian standards and the European standard EN 12828:2014 "Systems heating in buildings. Design of water heating systems.

Boilers Vitopend 100-W with an open combustion chamber use natural draft to remove combustion products. The coaxial LAS exhaust system of the Vitopend 100-W boilers with a closed combustion chamber ensures forced removal of combustion products. The rated heat output of the boiler, depending on the model and mode of operation, ranges from 10.5 to 31 kW.

The Vitopend 100-W boiler is intended for use in any climatic conditions and is designed exclusively for heating a heat carrier that has the properties of drinking water. The basic condition for the intended use is a fixed wall installation. For ease of installation, a specially designed template is attached with the designation of the main fastener points.

It is possible to combine the Viessmann Vitopend 100-W boiler with additional units approved for operation with this boiler system. So, for example, a single-circuit gas heating boiler Vitopend 100-W, when equipped with a Vitocell 100-V water heater, is used for hot water supply, both domestic and drinking.

In some cases, purposes of use that go beyond the established limits may require the approval of the manufacturer. Non-intended use is considered to be production or industrial use or for purposes other than space heating or domestic hot water.

Improper operation (handling) of the Vitopend 100-W gas boiler is prohibited and releases the manufacturer from liability for failure of the boiler system. Changing the elements of the heating system in relation to their intended functionality is also considered improper handling of the boiler.

Low-temperature wall-mounted gas boiler Vitopend 100-W, type WH1D is easy to transport, has a low weight and dimensions, which makes it possible to place it even in small areas, for example, in wall niches.

Specifications

Table number 2.

Single-circuit and double-circuit boiler VIESSMANN VITOPEND 100-W WH1D

The combustion chamber

open

closed

Technical Parameter

Meaning

Boiler identification number

Nominal heating output range for space heating/DHW heating

Efficiency at full load (100%)

Efficiency at partial load (30%)

Nominal gas supply pressure

Natural gas

Natural gas with pressure sensor

Liquefied gas

Maximum allowable gas supply pressure

Natural gas

Liquefied gas

Maximum electrical power consumption*

Working voltage

Electrical protection class

Maximum boiler water temperature

Permissible operating pressure

Diaphragm expansion tank

Inlet pressure

Boiler volume Vitopend

DHW indicators**

Max. operating pressure

Long-term performance for hot water preparation

Water consumption (T = 30 K)

Adjustment range DHW temperature

Flow parameters at maximum load

Natural gas

Liquefied gas

Energy efficiency and environmental friendliness

Energy efficiency according to 92/42 EWG

NO x emission

__ mg _

CO emissions at full load

Flue gas characteristics at 20 °C air temperature (natural gas/LPG)

Flue gas temperature at maximum output

Flue gas temperature at minimum output

Flue gas flow at maximum output

Flue gas flow at minimum power

Flue gas pressure: - maximum allowable pressure

Required pressure

Residual pressure of flue gas fan

System of removal of products of combustion LAS

Chimney diameter

coaxial chimney

Parallel chimney

Note.

* Maximum electrical power input including circulation pump.

** DHW values ​​only for gas combined (two-circuit) hot water boiler.

Device and product description

Gas low temperature hot water boiler flow type low heat output Viessmann Vitopend 100-W, type WH1D is one of the most popular high-performance, economical wall-mounted boilers, and for a potential owner it is especially important: with an optimal ratio between price and quality - cost and performance. The rated heat output developed by Vitopend 100-W gas boilers, type WH1D, provides the most comfortable and economical heating residential buildings of various area and construction volume. The heat output of boilers with a closed combustion chamber for space heating and hot water preparation is 24.8/31 kW and 24/30 kW for an open combustion chamber.

Wall mounted hot water Viessmann boilers Vitopend 100 W are divided into two types: single-circuit and double-circuit. The process of heat exchange in boilers of both types is basically the same and consists in the following: the combustion products of the fuel heat the water (coolant) passed through the lamella-type primary heat exchanger. The main difference between the two types of Vitopend 100-W WH1D boilers is that in addition to the primary heat exchanger, elements of the hot water heating device for hot water supply are installed in the double-circuit boiler. That is why an important element of the Vitopend 100-W WH1D double-circuit boiler is a plate-type flow heat exchanger of small volume, in which cold water from cold water - cold water supply system is heated by hot coolant circulating in the system. The heat exchanger for hot water preparation is installed on the chassis of the AQUA-BLOC hydraulic unit.

The direction of the coolant flow is set by another important element of the Vitopend 100-W WH1D boiler - a three-way valve. In its state, two positions are possible: in one of them, the hot coolant is supplied to the system central heating, in the other - the coolant goes to the heat exchanger, heating the water for hot water supply. In this case, the DHW mode is considered a priority, to which the valve switches when any hot water flow tap is opened. It controls the operation of the three-way valve of the relay (sensor) of the flow installed in the boiler. Convenient regulators allow you to quickly set the flow temperature of the heating line and hot water.

The Vitopend 100-W gas boiler, type WH1D, provides high hot water comfort with a continuous output of 14.3 l/min (at 30/31 kW). Maintaining a constant temperature of hot water is carried out thanks to electronic regulation and the presence of a temperature sensor on the output line. The DHW temperature setting range is 30 - 57°C.

The single-circuit boiler Vitopend 100-W WH1D is naturally not equipped with a hot water heat exchanger for the DHW system, however, it is possible to complete the boiler of this type with an autonomous storage water heater from Viessmann, for example Vitocell 100. At the same time, the degree of water heating is measured by a temperature sensor DHW tank, which is connected to the electrical circuit of the boiler (Fig. 16).

The temperature in the supply line or hot water can be controlled from the digital indication on the display. Boilers Vitopend 100 are equipped with a diagnostic system that displays the operating and service status of the device, as well as emergency modes. The pressure gauge installed on the boiler control panel measures the pressure in the boiler system.

The Viessmann Vitopend 100-W boiler, type WH1D, has a long service life and is reliable in operation even with significant fluctuations in gas pressure and electrical voltage. Due to its small overall and mounting dimensions, the boiler is suitable for installation even on the walls of small kitchens or in wall niches in utility rooms.

The main advantages of the atmospheric low-temperature gas boiler Vitopend 100-W, type WH1D wall-mounted:

​ gas water heating single/double circuit boiler with a range of thermal power from 10.5 to 31 kW;

Modulated atmospheric burner for operation on natural and liquefied gas;

Efficiency: 83% (Hs) / 92% (Hi);

Boiler capacity in DHW mode is 14.3 l/min;

maintaining a constant temperature of hot water thanks to an electronic temperature controller;

open and closed combustion chamber;

Compliance with high environmental requirements;

· Classification of a boiler with a closed combustion chamber for energy efficiency in accordance with 92/42 EWG "Three Stars";

Availability of a system for diagnosing the operating modes of the boiler, with information about the emergency mode;

Availability of a frost protection system;

compact size and silent operation;

low energy consumption of the boiler due to the use of weather-dependent automation;

high reliability of ignition;

Built-in gas pressure control switch for automatic switching on after a failure in the gas supply;

Silent start of the boiler thanks to the intermittent ignition system;

The small weight of the boiler facilitates transportation;

compact design contributes to the ease of installation of the boiler installation;

Supplied ready to use;

high operational reliability and long service life;

Possibility of combination with capacitive storage.

By design, the Viessmann Vitopend 100-W gas boiler is a rectangular case, inside which a heat exchanger, a gas burner, an AQUA-BLOC hydraulic unit with circulation pump, membrane expansion tank and other elements necessary for the operation of the boiler (Fig. 1). Highly effective thermal insulation of the combustion chamber protects the outer surface of the boiler system from heating.

A modulating atmospheric burner is used in the Viessmann Vitopend 100-W hot water single / double-circuit gas boiler of low thermal power. With smooth modulation control, the burner changes its power within the specified range, maintaining the controlled parameter - the temperature of the supply line at a given level. Therefore, a necessary element of the control system is a temperature sensor and an electronic controller. The modulating atmospheric burner of the Viessmann Vitopend 100-W gas boiler is pre-configured to operate on natural gas type "E". A set of replacement jets, which is not included in the scope of supply, allows the boiler burner to be converted to work on liquefied gas. The built-in gas pressure control switch automatically switches the boiler into operation after a failure in the gas supply.

Removal of products of combustion of gas boilers Viessmann Vitopend 100-W with a closed combustion chamber is carried out by means of a separately located fan. The fan parameters are calculated depending on the maximum burner power and aerodynamic drag gas-air path of the heat generator. The air supply is regulated by changing the position of the air damper when the burner power changes.

Heating of boiler water takes place in the primary flow-through lamellar type heat exchanger (Fig. 2). At the same time, in boilers of different thermal power, the number of lamellae also varies. So, for example, in boilers with a power of 30/31 kW, the number of lamellas is 98, and in boilers with a power of 24/24.8 kW, there are 82 lamellas. The total volume of the primary heat exchanger is 1.2 liters of boiler water (Table 2)

Since the heating installation is a water-heating wall-mounted single-circuit gas boiler Viessmann Vitopend 100-W, Since the WH1D type is delivered in a state of operational readiness, the boiler automation is pre-set in the factory for operation in standard mode. At the same time, the boiler water temperature setting of the Viessmann Vitopend 100-W heat generator with low heat output does not exceed 76 °C. The initial factory setting can be changed at the discretion of the user in order to create more comfortable living conditions. By resetting the thermostatic controller, it is possible to increase the boiler water temperature and thus the flow temperature. However, the manufacturer recommends that, in order to minimize distribution losses, the DHW system and heat distribution device should be set to a supply temperature of no more than 70 °C. During operation of the gas boiler, the temperature of the boiler water is constantly displayed on the display located on the control panel.

Rice. 3. Controls and indications

Fig.4. Display indication

1 - manometer;

2 - display;

3 - regulator "Hot water temperature";

4 - regulator "Heat carrier temperature";

5 - on / off button with the RESET function.

A - heating;

B - preparation of hot water;

C - digital indication or fault code;

D—temperature, °C;

E – service setting is active (only for specialists);

F is the current burner power;

G - the burner is working;

H - malfunction.

In the boiler Viessmann Vitopend 100-W, Type WH1D has built-in automation that allows you to control the boiler in operation mode with a constant supply temperature. The operating modes are carried out using the built-in controller and are set by the controls on the boiler panel (Fig. 3). All functions of the boiler installation can be set with just two control knobs: hot water temperature control and heat carrier temperature control. At the same time, easy-to-use regulators allow you to quickly set the flow temperature of the heating line and hot water supply.

During the operation of the Viessmann Vitopend 100-W boiler, type WH1D without control device remote control(thermostat), the desired room temperature is set by the “Heat carrier temperature” knob. To maintain the set temperature in the premises of the house to the Vitopend 100-W boiler, type WH1D four types of remote control room thermostats (control devices) can be connected:

– Vitotrol 100, type RT room thermostat for controlling the boiler according to the set room temperature;

– Vitotrol 100, type UTA programmable room thermostat;

– Vitotrol 100, type UTDB digital thermostat with large LCD display;

– Vitotrol 100, type UTDB-RF room thermostat with integrated receiver and separate radio transmitter.

It should be noted that Viessmann Vitopend 100-W boilers are equipped with a built-in anti-freeze function and a diagnostic system that, using digital indication on the display, informs about the operating and service modes of the boiler, as well as about the occurrence of an emergency mode (Table 3).

Table number 3.

Fault indication on the display

malfunctions

Installation behavior

Cause

malfunctions

Accepted

measures

A0

Burner blocked

Gas pressure too low

Check gas pressure and gas pressure switch

E0

Burner blocked

Thrust tipping control device activated

Check gas duct.

Instruction. If the draft tipping 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 and connecting cables.

Turn the knob to unlock"Coolant temperature" almost to the full to the right and then back (reset).

F3

Burner failure

Flame signal already present at burner start

Check ionization electrode and connecting cables.

F4

Burner failure

No flame signal

Check ignition electrodes / ionization electrode and connecting cables, check gas pressure, check gas control valves, ignition, ignition transformer.

Switch the power switch off and on again or perform a reset, see F2.

F6

Burner failure

Thrust tipping control device activated

Check the tilt sensor.

Switch the power switch off and on again or perform a reset, see F2.

F30

Burner blocked

Short circuit of the boiler temperature sensor

F38

Burner blocked

Boiler temperature sensor break

Check the boiler water temperature sensor.

F50

Short circuit of the temperature sensor of the tank water heater (gas single-circuit boiler)

Check sensor

F51

No hot water preparation

Short circuit of the outlet hot water temperature sensor (gas combi boiler)

Check sensor.

F58

No hot water preparation

Breakage of the temperature sensor of the storage water heater (gas single-circuit boiler)

Check sensor.

F59

No hot water preparation

Break in outlet hot water temperature sensor (gas combi boiler)

Check sensor.

b0

Burner blocked

Short circuit of the traction control sensor

Check sensor.

b8

Burner blocked

Breakage of the traction control sensor

Check sensor.

The AQUA-BLOC hydraulic unit with circulation pump (Fig. 5) is installed in the lower part of the boiler on an easily removable chassis and is equipped with a MULTI-STECKSYSTEM quick coupling. This makes it quite easy to service, since all the most important components of the unit are easily accessible from the front of the boiler and can be quickly replaced if necessary. Technical characteristics of the circulation pump are given in table No. 4.

Table number 4.

Parameter

Unit rev.

Pump type

UP 15-60

UP 15-50

Rated heat output of the boiler

Hydraulic characteristic (fig.6)

Voltage

Circulation pump power

Installation input parameters:

· Water temperature:< 85 °C.

· Minimum pressure: 0.8 bar.

The circulation pumps UP 15-50 and UP 15-60 are small in size and light in weight, operate almost silently and at the same time consume a minimum amount of electricity. The pump housing is made of cast iron, the motor housing is made of extruded aluminium. The motor shaft of the circulation pump is made of hardened stainless steel and is mounted on bearings that are lubricated using the pumped liquid. The circulation pump impeller is made of durable technopolymer.

An important element of the combined (double-circuit) boiler Viessmann Vitopend 100-W WH1D is a small plate-type heat exchanger in which cold water from the cold water supply system is heated by the hot coolant circulating in the system. At the same time, the number of plates varies between boilers of various capacities and heat exchanger volumes. So in boilers with a thermal power of 30/31 kW, the number of plates is 14, and in boilers with a power of 24/24.8 kW - 12 plates.

The expansion of water (coolant) is designed to compensate for the membrane expansion tank, the total volume of which for boilers with a capacity of 24/24.8 kW is 6 liters, and for boilers with a capacity of 30/31 kW - 10 liters (Table 2).

Nomenclature and overall dimensions

24/24.8 kW boiler

30/31 kW boiler

Fig.10. Overall and mounting dimensions of the Viessmann gas boiler Vitopend 100-W, type WH1D

A - place for electrical cables.

B - the required height, taking into account the underfloor DHW cylinder.

C - width (depth) of the boiler.

D - reinforcing cover.

Table number 4.

Overall dimensions of the wall-mounted gas boiler Viessmann Vitopend 100-W, type WH1D

Parameter

Boiler heat output

Height with reinforcement cover

Height including underfloor DHW cylinder

Weight of single/double circuit boiler

Boiler connections:

supply line

return line

Gas connection

Installation instructions

Vitopend 100-W wall-mounted gas boilers have been specially designed for quick installation and reduced maintenance time. Installation of the Viessmann Vitopend 100-W wall-mounted boiler, type WH1D, should be entrusted to a specialized service organization. However, work on gas equipment may only be carried out by installers who are authorized by the responsible gas supply company.

The room for the installation of a floor-standing single-circuit gas boiler Viessmann Vitopend 100-W must be with normal humidity and meet the requirements of the relevant building codes and standards, in particular SNiP 41-01-2003 "Heating, ventilation and air conditioning". Failure to comply with these requirements may result in malfunctions and damage to the boiler system.

Frost protection and proper ventilation are essential for normal operation of the boiler. So, for example, for the operation of the boiler burner, the required volume of air must be taken from the room, for which it is necessary to install a special duct-air duct that goes beyond the outer wall - into the atmosphere. To prevent drafts in the burner area, the air intake duct must not end directly behind the boiler. With a rated heat output of a gas boiler up to 35 kW transverse section air duct must be at least 150 cm².

It is not allowed to pollute the air of the room for the installation of the Viessmann Vitopend 100-W floor single-circuit gas boiler with halogenated hydrocarbons, which, for example, are part of aerosols, paints, solvents and detergents. In the event of air pollution by halogenated hydrocarbons, the boiler may only be installed if sufficient measures are taken to ensure that uncontaminated combustion air is supplied. In addition, strong dust and high humidity are not allowed in the room.

In order to avoid damage and deformation of the connecting pipes of the Vitopend 100-W boiler, it is strictly forbidden to use an improper installation tool and apply excessive forces (loads). Pipelines connected to the heating boiler during installation and after installation during operation should not experience residual mechanical stresses and loads (bending, misalignment, compression, torsion, tension, vibration, distortions, uneven tightening of fasteners).

Fig.11. Mounting kit, straight

Fig.12. Mounting kit under the boiler

1 - Hanging bar.

2 - Mounting kit for connection, straight.

3 - Reinforcing cover.

To connect the boiler to the gas pipeline and for surface mounting of the hot water supply and heating system, a connection kit with straight pipes is included (Fig. 11). For visual completion of the boiler connection, a protective decorative reinforcing cover is supplied.

For connection to the Vitopend 100-W boiler of the underfloor heating system, a set with a thermostatic mixer is offered, which limits the maximum supply temperature to the underfloor heating system and guarantees the operation of the boiler without the formation of condensate (Fig. 12). The kit comes with a decorative cover.

Several options are available for connecting a Viessmann DHW cylinder with a capacity of 120 or 150 liters to the boiler. This can be a connection kit for mounting a water heater under the boiler, as well as a connection kit for mounting a water heater installed next to the boiler.

Pre-marking with mounting template.

Boiler installation.

Connection of electrical connections.

Commissioning.

Fig.14. Installation and commissioning of the boiler

Scheme electrical connections gas boiler Viessmann Vitopend 100-W, type WH1D

CN 8– stepper motor of the switching valve;

T8– high voltage transformer and line and ionization line;

3 – boiler water temperature sensor;

4 – outlet temperature sensor (combi boiler only);

5 – cylinder temperature sensor (single-circuit boiler only);

20 – internal circulation pump;

35 – electromagnetic shut-off gas valve;

47 – temperature limiter;

149 - relay (sensor) DHW;

100/159 – blocking of exhaust devices by means of an external extension module H3;

162 – traction control sensor;

190 - modulating coil.

Since the Viessmann Vitopend 100-W WH1D gas boiler is supplied ready for direct operation, the main electrical installation connections are made inside the boiler at the factory. Mounting the connection of auxiliary equipment, e.g. room thermostat The Vitotrol 100 or the Vitocell 100-W DHW cylinder is connected to the connections of the boiler controller, so this work and the mains connection must be entrusted to a specialist service provider. For example, the connection of the "L" and "N" cores of the mains cable must be observed, as an incorrect connection can lead to serious injury and damage to the device. In addition, the connecting cables must not come into direct contact with hot parts, as this will damage the cables.

Cable NYM-J 3 × 1.5 mm 2 recommended by the manufacturer for powering the equipment of the Vitopend 100-W WH1D boiler from electrical network, has the appropriate number of cores for external connections. The power supply network must have a neutral wire, and the mains supply cable must have a disconnector that simultaneously disconnects all ungrounded wires from the network with a contact opening of at least 3 mm.

When installing the unit in wet rooms, it is forbidden to connect auxiliary equipment on the controller to the boiler in the zone high humidity. When installing the boiler outside of wet rooms, the connection of accessories to the mains can be made directly on the controller. This connection is controlled directly by the controller's power switch.

The manufacturer recommends installing a gas boiler in the area of ​​​​the passage chimney through the building structure. The flue gas outlet must be connected to the chimney in the shortest possible way via a chimney. In this case, sharp bends in the gas outlet pipes should be avoided. When installing the chimney, it is necessary to check that the cross section of the chimney pipes and the chimney matches the cross section of the boiler nozzle. A distance of at least 100 mm from the chimney to flammable structural elements must be ensured. If necessary, provide thermal insulation of the chimney pipe.

The well-deserved confidence of customers in Viessmann and the correspondingly high demand for its products, which comply with European UNI-EN standards, were also noted by manufacturers of counterfeit goods. On the Russian market cheap fakes of Viessmann products have penetrated, which are distinguished by a low price and equally low quality.

The use of such "branded" goods is fraught with the occurrence of emergency force majeure circumstances associated with the use gas equipment. The money spent to remedy these circumstances is nothing compared to the cost of genuine Viessmann branded products.

If you want to avoid such surprises, purchase original Viessmann products only from authorized distributors.

RANDSTROY Group of Companies

is the official distributor of VIESSMANN products

in Russia and CIS countries

Most of us live in a house or apartment small sizes. Therefore, when installing gas system heating, the owners want the boiler to take up as little space as possible. Many place it in small bathrooms or kitchens. This gives rise to interest in small wall-mounted gas boilers that have minimal dimensions. Most mounted units have a height of 700 mm, a width of 400 mm and a depth of 250 mm. Consider models of gas boilers with the smallest dimensions.

One of the smallest wall-mounted gas boilers is Ferroli DOMIproject Slim F18. Its height is 655 mm, width - 350 mm and depth - 230 mm. The weight is only 27.3 kg.

This double-circuit model with a closed combustion chamber has a power of 18 kW, which is enough to heat an area of ​​​​up to 150 m². It has a bithermic heat exchanger and is equipped with the function of accelerated preparation of hot water "Comfort".

The unit is equipped with a digital heating system, a modulating burner that can change the power in the range from 6.7 to 18 kW. Thanks to easy access to internal elements, this gas boiler easier to service.

Main characteristics of Ferroli DOMIproject Slim F18:

  • Efficiency=90%;
  • DHW capacity at Δt=30 - 8.6 l/min;

Ferroli DOMITECH C24

Another compact model manufactured by Ferroli is the DOMITECH C24. Its height is 700 mm, width - 400 mm, depth - 260 mm. The boiler weighs 27 kg.

This double-circuit device with an open combustion chamber has a power of 24 kW and is able to heat a room up to 200 m². It is equipped with a bithermic heat exchanger, as well as multifunctional control and monitoring systems with safety operation. The type of combustion chamber requires the installation of a classic chimney.

Key features Ferroli DOMITECH C24:

  • Efficiency=90.5%;
  • country of origin - Italy.

Bosch Gas 3000 W ZS 28-2KE

The dimensions of the Bosch Gaz 3000 W ZS 28-2KE are: height - 700 mm, width - 400 mm, depth - 298 mm. The weight of the model is 30 kg.

This single-circuit unit with an open combustion chamber has a power of 28 kW and is able to heat an area of ​​up to 250 m². It is equipped with a multifunctional display and ionisation flame control. The heat exchanger is made of copper. The type of combustion chamber requires the installation of a classic chimney.

Main characteristics of Bosch Gaz 3000 W ZS 28-2KE:

  • Efficiency=90%;
  • country of origin - Turkey.

Teplovest KGO-18-S BUDGET

The compact mounted gas boiler Teplovest KGO-18-S BUDGET has a height of 700 mm, a width of 350 mm and a depth of 250 mm. The weight of the unit is record-breakingly small and amounts to 21 kg.

This single-circuit boiler can be equipped with a turbocharged (C) or atmospheric (B) burner. Its power is 20.5 kW, which is enough to heat 150 m². It is equipped with a monothermal heat exchanger and is able to easily replace an old floor-standing boiler in an existing heating system.

Main characteristics Teplovest KGO-18-S BUDGET:

  • Efficiency=90%;
  • gas consumption - up to 2.1 m³ / hour;
  • country of origin - Ukraine.
Note! Most owners buy small wall-mounted models of boilers to sew up in niches or hide in a closet, while forgetting about the need for repairs. Therefore, during the installation process, you should leave room for free access heating specialist.

Fondital Antea CTFS 24

One of the smallest mounted gas boilers is Fondital Antea CTFS 24. Its height is 700 mm, width is 400 mm, depth is 250 mm. It has a weight of 26 kg.

This double-circuit model with a closed combustion chamber has a power of 25.5 kW, which is enough to heat 220 m². The boiler is equipped with two separate heat exchangers: the primary is made of copper, the second is made of steel. It has a modern control board and a user-friendly user interface.

Main characteristics of Fondital Antea CTFS 24:

  • Efficiency=93%;
  • gas consumption - up to 2.7 m³ / hour;
  • DHW capacity at Δt=30 - 11.1 l/min;
  • country of origin - Italy.

Ferroli FER EASYtech C 24

Model Ferroli FER EASYtech C 24 has the following dimensions: height - 700 mm, width - 400 mm, depth - 230 mm. The weight of the boiler is 27 kg.

This double-circuit unit with an open combustion chamber has a power of 24 kW and is able to heat a room up to 200 m². It is equipped with an enlarged bithermic heat exchanger and modern multifunctional control and monitoring systems for safe operation. The type of combustion chamber requires the installation of a classic chimney.

Key features Ferroli FER EASYtech C 24:

  • Efficiency=90.5%;
  • DHW capacity at Δt=30 - 11.1 l/min;
  • country of origin - Italy.

TERMET MiniMax DYNAMIC 24 kW (turbo)

The compact boiler TERMET MiniMax DYNAMIC 24 kW (turbo) has a height of 700 mm, a width of 360 mm and a depth of 300 mm. Weight is 28 kg.

This double-circuit unit with an open combustion chamber has a power of 24 kW and is able to heat an area of ​​​​up to 200 m². The primary heat exchanger is made of copper, the secondary heat exchanger is made of stainless steel. The boiler is equipped with a modulating burner and necessary systems control over safe work. The type of combustion chamber requires the installation of a classic chimney. Main characteristics of TERMET MiniMax DYNAMIC 24 kW (turbo):

  • Efficiency=91%;
  • DHW capacity at Δt=30 - 11.4 l/min;
  • gas consumption - up to 2.7 m³ / hour;
  • country of origin - Poland.