The smallest gas boilers. Gas boilers "endurance" (endurance) a series of floor double-circuit boilers of low power, high efficiency The best floor units

Gas boilers are a fairly convenient and economical way to solve heating problems in a private house. Most owners prefer mounted models with a power of 10 kW. Such a heater does not take up much space and allows you to warm up a room of about 100 square meters.

Features of wall-mounted gas boilers

There are two main types of gas wall-mounted boilers:

• single-circuit - serve for heating;
• double-circuit - in addition to their main task, they allow heating running water.

When choosing a model, keep in mind that most heating appliances of this class require a connection to the chimney. This is especially true for equipment with open cam combustion. But in recent times leading manufacturers have begun producing unique models with forced draft, allowing you to remove toxic substances through small hole in the wall. This development made it possible to use boilers even in apartments of multi-storey buildings.

To the main benefits gas equipment for heating is easy to operate. You can start it by pressing a few buttons, and you do not need to monitor the work. If the flame goes out, the lockout system will activate. But at the same time, safety rules should be observed:

• install the device in well-ventilated and/or ventilated rooms;
• it is necessary to provide good illumination and access to cold water;
• it is forbidden to put boilers on the basement floors.

Are you going to buy an efficient gas boiler that can provide heat in the most severe frosts? There are many factors to consider when choosing equipment for your home. What is the best option? What are the most important criteria? Owners of both private houses and apartments have to think about solving this problem.

Agree, it’s a shame to pay twice and end up with an insufficiently functional boiler that can’t heat Vacation home with the onset of cold weather. Therefore, before choosing a gas boiler in a store, you will have to weigh the pros and cons. Otherwise, you can take a far from suitable model.

We will help you determine the main criteria that dramatically affect the choice. Useful recommendations and important nuances are set out in our article. Photo materials and a selection of videos with advice from experienced experts in the field of heat supply are provided to help the homeowner.

The absence or constant interruptions of centralized heating and hot water supply are forcing the owners of cottages and city apartments to create.

Their main element is a boiler, which, by burning fuel, heats the coolant for the heating system and water for domestic needs.

The choice in favor of gas equipment is due to the cost-effectiveness of using gas as a fuel. All other options for combustible fuel are more expensive or give less heat at times.

Plus, modern heaters of this type do not require constant supervision. I connected the unit to the main pipe or cylinder, and it works smoothly as long as there is something to burn.

The use of natural gas is the optimal solution for heating a private house in terms of fuel costs and operating costs.

However, in order for the gas boiler to function properly and in optimal mode, it is necessary to choose it correctly when buying and regularly service it after connection.

There are many different in functionality and special modules within the models of this equipment. The purchase of a gas heating unit should be approached thoughtfully.

There are many criteria for choosing a gas boiler, but the main ones are:

1. The power output by the device.
2. Layout solution (number of circuits, body type and heat exchanger material).
3. Place for installation.
4. Availability of automation for safe operation.

All these questions are closely related. The lack of space for a large unit or the desire to mount a device with an aesthetic appearance in the kitchen force you to choose wall model less power than floor version. And the need to heat hot water for the washbasin and shower makes you look for a boiler with two circuits.

When choosing a heater, you should remember about the need to repair it, if there is no workshop for servicing the selected model nearby, then you should look for another option

The subtleties of choosing a boiler for heating and hot water

Modern thermal equipment has a stylish appearance, is filled with all sorts of sensors and can operate in several modes.

Each gas boiler has a burner inside the body and a combustion chamber with a heat exchanger, but there are also models with a circulation pump and other modules

First, the gas in the burner is ignited using an electronic system or a piezoelectric element. Then, as a result of its combustion in the furnace, water is heated by means of a heat exchanger, which is sent to the heating system circuit.

This is how classic single-loop models work. To prepare domestic hot water, you must select or connect a boiler.

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Manufacturer : Viessmann Werke GmbH & Co. kg,

Viessmannstraße 1 - 35108 Allendorf (Eder), Germany

Wall

gas heating boiler

VITOPEND 100- W

Type of: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 modulated 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 construction volume.

According to the intended use, the Vitopend 100-W single/double circuit hot water boiler may only be installed and operated in closed heating systems with forced circulation of the coolant and in accordance with the relevant installation, service and operation instructions in accordance with Russian regulations 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. coaxial system removal of combustion products LAS boilers Vitopend 100-W with closed camera combustion ensures the 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 industrial or industrial use, or for purposes other than space heating or hot water production.

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.

The low-temperature wall-mounted gas boiler Vitopend 100-W, type WH1D is easy to transport, has a small weight and overall 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)
DHW temperature control range
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 value power
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 consumption including circulation pump. ** DHW values ​​only for gas combined (two-circuit) hot water boiler.

Device and product description

The gas low-temperature water-heating boiler of the flow type of low thermal power 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 boilers Viessmann 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 important element double-circuit boiler Vitopend 100-W WH1D 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 - three-way valve. In its state, two positions are possible: in one of them, the hot coolant is supplied to the central heating system, 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 Vitopend 100-W WH1D single-circuit boiler is naturally not equipped with a hot water heat exchanger for the DHW system, however, it is possible to equip this type of boiler with an autonomous Viessmann DHW cylinder, for example Vitocell 100. boiler diagram (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 a circulation pump, a membrane expansion tank and other elements necessary for the operation of the boiler (Fig. 1). Highly efficient thermal insulation of the combustion chamber protects against heating outer surface boiler plant.

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 delivery, 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 power of the burner and the aerodynamic resistance of the 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. Primary 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 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 make service maintenance, 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.
dimensions 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 rules and regulations, 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, the cross section of the 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 connections, direct. 3 - Reinforcing cover.

For connecting the boiler to the gas pipeline and for open mounting hot water and heating systems, 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 set of connections for mounting a water heater under the boiler, as well as a set of connections 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 exhaust devices via an external expansion 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 specialized service company. 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 of 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 official distributors.

RANDSTROY Group of Companies

is the official distributor of VIESSMANN products

in Russia and CIS countries

Due to the fact that the majority country houses in Russian cities and towns are not equipped central heating, the issue of heating the home is quite acute. Gas heating systems quite easily solve the issue of creating autonomous heating. If the house has electric water heater, then the best solution is .

Today, the Russian climate technology market is overflowing with heating systems from manufacturers from Germany, Italy, France, Slovenia and China. Domestic technology in terms of its characteristics, it is not inferior to the leaders of this segment and becomes on a par with such brands as Bosch, Vaillant, Baxi, etc. In a huge number of models, manufacturers, trademarks It is not surprising to get confused even by a specialist. That is why the domestic consumer is increasingly asking the question, which gas single-circuit boiler is better?

Criterias of choice

To choose the right model of a heating boiler, you should have an idea about the design and principle of operation of the device. If there is no such knowledge, then contact the experts. If you can imagine how single-circuit gas installations are arranged, then before choosing a particular model, pay attention to the following points and design features:

1. Manufacturer. Manufacturers from Germany (Bosch, Vaillant) are leading in the production of reliable gas heating installations. The most functional single-circuit boiler units are offered by manufacturers from South Korea (NAVIEN), Slovenia (Protherm). Italian manufacturers offer devices with the best combination price-quality (Baxi and Ferrolli).
2. Ignition type. In modern heating boilers you can find electronic and piezo ignition. The first type - involves the ignition of the gas mixture in automatic mode. In the second, batteries are used as a power plant. Ignition requires human intervention.
3. Burner. Single-circuit boilers use single-stage and modulating burners. Single stage always run at 100% power. Modulated - more modern, allow you to change the heating power of the coolant in the range from 30 to 100%. In addition, the burner can be atmospheric or turbocharged. Atmospheric - more hardy and silent. Turbocharged - have a higher efficiency, but also cost significantly more.
4. heat exchanger material. For the heat exchanger, a material with good thermal conductivity and resistance to high temperatures. Copper is a material with better thermal conductivity and a low melting point. A boiler with a copper heat exchanger should be selected with a low power equipment. In addition to copper, stainless steel is used for coils, which is characterized by average thermal conductivity and durability. Cast iron heat exchangers are durable, but due to heavy weight are used only in floor models.
5. The combustion chamber. Modern boilers are equipped with an open or closed combustion chamber. In the open, the air is taken from the room, in the closed, the air comes from the street through coaxial chimney.
6. Removal of combustion products. Exhaust gases are removed in modern heating boilers using natural and forced draft. In the first case, you need vertical chimney and good ventilation in the boiler room. In the second option, combustion products are removed through a coaxial chimney using a built-in fan.

In order to help

single-circuit wall-mounted boilers opens one of the most functional heating devices - Vaillant turboTEC plus VU 122/3-5. This multifunctional unit is designed for heating small areas, up to 120 m 2 . The rated power of the boiler is 12 kW, which is controlled automatically by a modulating burner. The device is equipped with: a closed combustion chamber, a turbine for the forced removal of exhaust gases, a built-in multi-stage pump that drives the coolant, a copper heat exchanger, an electronic ignition unit and control of all plant functions, information about which is displayed on an informative LCD monitor.

This model is adapted to work in electrical networks with voltage drops, thanks to the built-in stabilizer. The boiler works without losing power at reduced pressure in the gas pipeline. To work together with a water heater, Vaillant turboTEC is equipped with the necessary connectors. Efficiency - 91%. average cost in Russian stores - 50 thousand rubles. Disadvantages - high cost.

Baxi FOURTECH 1.24F

This popular wall mounted model features a closed combustion chamber, turbocharging and forced system smoke removal. Flame modulation in the burner allows you to change thermal power in the range from 9.3 to 24 kW. Maximum thermal load 25.8 kW. The material of the heat exchanger is copper. The boiler unit is equipped with a water pump for forced movement of the coolant through the heating system. A 6-liter expansion tank allows you to compensate for the expansion of the coolant due to its heating.

For comfortable use, the unit is equipped with an indication of modes, auto-ignition, and a built-in thermometer. Safety is ensured thanks to the protection of the heat exchanger from overheating, a blast valve, a gas control system. The unit has an automatic self-diagnosis function. The efficiency of the device is 92.9%. The average cost is 32 thousand 800 rubles. Disadvantages: in some models there were problems with the gas valve.

According to our experts and based on price - quality - functionality, the best single-circuit wall-mounted boiler from European manufacturers is Baxi FOURTECH 1.24 F

This model is a single-circuit heating boiler with small dimensions from Russian manufacturer"Gazapparat". The maximum power of the device is 18 kW. According to the manufacturer, it is enough to heat an apartment or a small private house, up to 180 m2. The boiler is equipped with an open combustion chamber, therefore it requires a separate chimney and good ventilation in the room where it is installed. The almost silent operation of this mini-boiler room is due to the use of an atmospheric burner. Thanks to the use of a copper heat exchanger, the efficiency declared by the manufacturer is at around 90%. Gas consumption 2.13 m 3 / h. When switching to liquefied gas, the consumption is 1.59 kg/h.

Comfortable use of this boiler unit is due to the presence of auto-ignition, the temperature and pressure in the system are displayed on the front panel of the unit. Safety is ensured by the gas control system, safety valve on the water circuit and protection against overheating of the heat exchanger. This model features low fuel consumption and ergonomic design. It is possible to connect: indirect heating boiler; systems "warm floor"; air turbine; external thermostat. average price is 20 thousand rubles. Disadvantages: often turns on and off without an external thermostat.

This model is designed for apartment heating in multi-storey buildings and private houses, up to 300 m 2 in area. The unit is equipped with a closed fuel chamber and has a capacity of 30 kW. The removal of exhaust gases is forced, with the possibility of using a separate and coaxial chimney.

Peculiarity this device is: continuous modulation of combustion; the presence of 1 copper heat exchanger, not subject to low-temperature oxidation; automatic ignition with flame level control. It is possible to connect a water heater and switch to liquefied gas. The main advantage of the boiler is accurate temperature control and the possibility of using propylene glycol-based coolant. Consumers positively evaluate this heating boiler for stable operation at low fuel pressure and voltage drops. Efficiency at 100% power - 92.5%. Cost - 36 thousand rubles.

If you decide to support a domestic manufacturer and wondered which single-circuit wall-mounted heating boiler is better, then according to our experts and in terms of price-quality-functionality ratio, the best single-circuit wall-mounted boiler from a Russian manufacturer is the NEVA-8230-1 model

As noted above, in the last decade, most of our compatriots prefer living outside the city in their own houses and cottages. Unfortunately, they are limited in power, so it is not always advisable to use them for heating large private houses. In this case, underfloor heating systems come to the rescue. Next, a rating of gas floor boilers from Russian and European manufacturers will be presented.

It is a floor heating system with an atmospheric burner and an open fuel chamber. The maximum power of the boiler is 44.5 kW. The design of this mini-boiler room includes a built-in boiler for 110 liters. to create a hot water system in the house. A feature of the boiler is the use by the manufacturer of a reliable and durable cast-iron heat exchanger. According to the manufacturer, its service life reaches 20 years. Main advantages: low fuel consumption 5.2 m 3 /h; protection class IP 40; Efficiency 92%. Disadvantages: does not work in gas pipelines with low pressure. Cost - 70 thousand rubles.

Designed for heating a small private house or cottage, with a total area of ​​​​up to 120 m 2. Equipped with a single-stage atmospheric burner, cast iron heat exchanger, electronic ignition and flame level control sensor. A feature of this model is the design of the burner with ceramic rods and a fuel flow regulator. The open chamber and the absence of pressurization make it impossible to install it in a room that is not equipped with ventilation and a natural draft smoke exhaust system.

Advantages of this heating system: high efficiency - 94%; the ability to connect an indirect heating boiler; the presence of automatic self-diagnosis. The average cost is 7 thousand USD. Disadvantage: there are no VRC 420S regulators in the package.

Lemax Premium 20 - single-circuit non-volatile boiler unit Russian production, with a power of 20 kW. The unit is equipped with a steel body, 2 mm thick, an atmospheric burner and an open fuel chamber. A feature of this device is the innovative design of the heat exchanger, with protection against overheating and coated with a special enamel that prevents its corrosion. The advantages of this device: the presence of an air flow regulator, self-diagnosis functions. Efficiency - 90%. The average cost is 21 thousand rubles. Disadvantages: frequent problems with ignition, general shortcomings.

Conclusion: in terms of price - quality - functionality, Vaillant AtmoVit INT 164-564 / 1-5 is unanimously recognized as the best floor boiler.

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 of an efficient 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 calorific value of any of these types of fuel must be within the framework of 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 the 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.

In the combustion process gas fuel 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 on the list are minimized.

Combustion chambers and burners

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

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

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 off thermal energy to the maximum. 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 essential conditions 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. It requires serious investments at the stage of purchase and installation of equipment, but in the future the system pays for itself due to serious savings in energy resources.

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 thanks to design features 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, efficiency and reliability 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.

A model with a closed combustion chamber 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 exit;
• 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.