Gas heating boilers wall-mounted double-circuit Neva. Wall-mounted double-circuit gas boiler Neva Lux: reviews, price. Buy a BaltGaz gas boiler in the online store

Wall-mounted boiler NEVA Lux-8624

Maximum power: 24 kW

Chimney diameter – 140 mm

Gas inlet – G 3/4”

Depth – 326 mm

Boiler weight – 39.5 kg

Wall-mounted boiler NEVA Lux-8230

Closed combustion chamber (turbo)

Maximum power: 30 kW

Water consumption when heating at 25°C (l/min): 14

Chimney opening for coaxial pipes – 100/60 mm

Chimney opening for separate pipes – 80/80 mm

Gas inlet – G 3/4”

Heating circuit inlet and outlet – G 3/4”

Hot water inlet and outlet – G 1/2”

NEVA Lux boilers

We understand Neva Lux gas boilers

The domestic gas boiler Neva Lux was developed taking into account the operating experience of consumers and with certain complaints related to the operation of heating equipment. As a result, several modifications were developed that combine several attractive qualities: rich functionality, ease of control, and are fully adapted to domestic operating conditions.

History of the Neva brand

Domestic consumers are already familiar with the Neva Lux double-circuit wall-mounted gas boiler, as well as its single-circuit analogue. However, few people know that the company that manufactures this heating equipment has more than half a century of experience.

Review of the Lux boiler line

The range of boilers is represented by two basic modifications: Lux and Turbo. If we talk about the Lux series that is already well known to consumers, it can also be divided into two categories:

Another significant difference that Neva Lux 2-circuit wall-mounted gas heating boilers have is the ability to connect two heating systems at once. There are outlets for heated floors. Independent control of coolant heating is carried out for each heating system.

Neva gas single-circuit atmospheric wall-mounted boilers are especially popular due to their low cost, ease of maintenance, and the absence of volatile components subject to voltage surges.

Connecting a thermostat significantly reduces gas consumption and ensures that the automation operates in a completely autonomous mode. The control unit will independently adjust the heating of the coolant, depending on the degree of heating of the room.

The company's new product is the Turbo boiler

As the Lux models were used, both negative and positive consumer reviews accumulated. Over time, all the necessary adjustments resulted in the production of a separate series of heating equipment.

A room thermostat is supplied as an additional option. The sensor sends a signal to turn off the heating when the room is heated to the required temperature.

Ease of maintenance and operation

Regardless of the chosen model, installation of a mounted boiler is quick and without the need for additional costs. The manufacturer places the main emphasis on ease of installation and subsequent operation. Therefore, the company’s boilers, in fact, represent a station ready for operation.

Gas boiler Neva Lux - review of equipment from the Baltic Gas Company

Review of the model range of gas boilers Neva (Neva) and rules for their installation

When choosing a gas boiler for heating a country house or city apartment, many people prefer domestic developments to imported ones. Moreover, it is economically beneficial: domestic gas boilers cost much less than European brands.

One of the leaders of domestic manufacturers of household heating equipment is the Neva company, which produces wall-mounted gas boilers of the luxury series. It is important to note that the technical characteristics of these units are in no way inferior to foreign analogues in terms of functionality, economy and efficiency.

A little about the Neva company

The company has existed for more than half a century, and initially it was a state-owned enterprise called Gazapparat. This enterprise specialized, as the name suggests, in the production of household gas equipment: water heaters, various heaters, and also produced heating boilers.

At the end of the 90s, the enterprise became the property of the Baltic Gas Company concern, while maintaining production facilities in the city of St. Petersburg. It was under the management of this giant that the company, one might say, received a second life and began to develop rapidly.

New types of Neva gas boilers, equipped with modern automation, saw the light. Errors and shortcomings of the first models were taken into account, and the equipment was seriously improved. As a result, today the domestic consumer has the opportunity to purchase a reliable single-circuit or double-circuit luxury series boiler at an affordable price. And the company is seriously thinking about entering the global sales market.

Model range of boilers Neva Lux

The luxury series, well known to consumers, is divided into two categories:

Advice! You can install a separate thermostat that will monitor the temperature in the room and transmit a signal to the gas boiler to turn on only when the temperature drops. This feature allows you to significantly reduce heating costs.

Now let's take a closer look at which models of Neva boilers are most popular among consumers.

Model Neva Lux 7218

For heating a living space up to 180 m2, the Neva Lux 7218 unit is best suited. The hot water circuit is designed to increase comfort and provides residents with hot water. This dual-circuit device is equipped with a bithermal heat exchanger, which reduces the cost of the 7218 boiler and maintains all user functions at a high level.

The heating gas apparatus Neva 7218 has the following technical characteristics and design features:

• A closed combustion chamber is used.
• The operating temperature range in the heating and DHW circuit of device 7218 is from 30 to 85 °C.
• Additional settings will help convert the unit to operation on liquefied gas.
• The efficiency of the model 7218 is 90%.
• The electronic safety unit continuously monitors the flame. This happens both during heating and DHW circuit operation.
• The ergonomic boiler Neva 7218 Lux goes on sale with European components, which has positive customer reviews.

Model Neva Lux 8224

This wall-mounted device Neva Lux 8224 has the following design features:

• The increased power allows the use of double-circuit boilers 8224 for heating an area of ​​up to 250 m².
• The unique combustion chamber is water-cooled, which significantly increases the service life of all parts.
• Microprocessor software installed in 8224 boilers ensures that the set temperature is maintained. The error is less than 1 degree.
• In addition, the gas apparatus 8224 is equipped with two heat exchangers: a copper one for the heating circuit and a stainless steel plate one for DHW.

Also, equipment management in the 8224 model has reached a new level: the ability to remotely control and connect a PC has been added for diagnostics and more precise settings.

Advice! The Neva 8224 Lux units have a digital display; all current information from the automatic self-diagnosis system is displayed on it.

All these innovations have received praise from consumers.

Model Neva Lux 8618

The Neva Lux model 8618 is a single-circuit gas boiler. Compared to floor-standing units of the same power, the Neva 8618 model has a higher efficiency (up to 90%) and is characterized by reduced gas consumption.

Wall-mounted boilers Neva Lux 8618 have the following features:

• Compact dimensions allow the unit to be installed even in small rooms without cluttering up the space.
• The reliability and complete adaptation to domestic operating conditions of the 8618 model is confirmed by numerous positive reviews about this device.
• The circulation pump built into the gas boiler 8618 from the Neva company allows installation in already installed heating systems.

In addition, such wall-mounted boilers have the ability to connect:

1. Indirect heating boiler.
2. Forced smoke exhaust fan.
3. A room thermostat, which makes the unit even more economical.

Advice! Another feature: gas boilers of this model are capable of operating at a pressure drop of up to 0.3 bar in the gas main.

Features of installing wall-mounted gas equipment

It is worth noting that a wall-mounted double-circuit boiler is a self-sufficient system and the installation of such equipment and its connection to existing networks does not cause difficulties. In order to install and connect a gas boiler, the following components are used:

• ball valves for cutting off water lines and heating circuits;
• various surges;
• coaxial chimney that comes with the boiler.

To ensure the protection of the boiler from various impurities, it is necessary to install a number of filter elements: gas, magnetic and coarse filter. Gas wall-mounted boilers are installed in the following sequence:

1. The Neva Lux boiler is installed on the wall using special strips that are included in the kit. To securely attach the mounting strips to the wall, it is best to use anchors.
2. Ball valves are installed at the inlet and outlet of the boiler of the DHW and heating circuits. This will facilitate further preventive maintenance of the unit.
3. Then comes the installation of all the necessary filters using suitable filters.
4. After this, you can begin installing the heating circuit and DHW, or make a connection to existing pipeline systems.

All gas connections and filter installation must be carried out by gas company employees who have permission for this type of work.

Advice! It is best to install the Neva Lux boiler in the kitchen or in another room of a private house where there is a ventilation hole. This is due to the rules for using gas equipment and general safety. Also, when choosing an installation location, you should take into account the convenience of supplying communications: water and gas pipes, electrical wiring.

The simple design and reliability of Neva Lux gas boilers is confirmed by numerous consumer reviews. After proper installation, there is no need to worry about the safety of the equipment. Modern automation allows you to avoid emergency situations even in the event of emergency situations: a power outage or a drop in pressure in the gas line.

Gas boiler Neva: model range and installation rules

Wall-mounted double-circuit gas boiler Neva Lux: reviews, price

Wall-mounted gas boilers are in great demand among consumers who have a house or small cottage. This is due to the advantages of this type of equipment. Thus, the wall-mounted boiler has small external dimensions, due to which the equipment can be installed indoors with minimal loss of space. The equipment does not make noise during operation and is capable of stably performing assigned tasks, regardless of operating conditions. Many users choose the Neva Lux double-circuit gas wall-mounted boiler for installation in the heating systems of their homes, the advantages and main technical characteristics of which will be discussed below.

Main technical characteristics and features of Neva company equipment

Please note that wall-mounted gas boilers on the market are available with open and closed combustion chambers. What does it mean? In the first case, combustion products are removed naturally, through the chimney to which the device is connected. The air required for normal gas combustion is taken from the room.

In the second case, the gas boiler is connected to a coaxial chimney, the design of which is made according to the “pipe-in-pipe” principle. Through the inner pipe, combustion products are forced out, thanks to the built-in fan, and air is supplied through the outer pipe, which comes from outside the room.

Wall-mounted double-circuit gas equipment is capable of performing two tasks aimed at heating the coolant and sanitary water. Heat exchangers are installed separately, one is designed to heat the coolant, the second is designed to heat sanitary water.

Household appliances of this type are distinguished by a wide power range, which allows you to select a unit for installation in an autonomous heating system for a house of any size. When choosing a device, it is important to consider that 1 kW is needed to normally heat 10 m2. So, if a house, for example, has an area of ​​200 m2, in which there is a need for hot water supply, then in order for the system to operate stably, efficiently and economically, you will need to buy a Neva double-circuit gas boiler of any model with a capacity of 24 kW.

Design features of the Neva boiler

Despite the fact that the Neva wall-mounted boiler is small in size, its design contains everything necessary for stable and high-quality operation of the equipment. Therefore, having chosen these heating boilers, you will not need to buy a separate circulation pump or expansion tank, the task of which is to promptly remove air from the heating system. According to experts, the built-in expansion tank can significantly increase the safety, reliability and stability of the heating system.

The main advantage of a built-in expansion tank from a remote tank is that there is no need to constantly check the coolant level; the equipment will do this for you. In addition, since there is no need to install an expansion tank, it is possible to significantly save on the installation of the heating system.

All models of gas boilers presented by Neva are equipped with pressure gauges, which are installed on the equipment panel. It is important to know that as the temperature increases, the pressure in the system increases and vice versa. The system should be replenished if the pressure drops below 1.5 atmospheres. Note that Neva wall-mounted appliances are able to continue to operate effectively at reduced gas and water pressure.

Let's return to the contours of the device, namely the one that is responsible for heating sanitary water intended for everyday needs. So, for its manufacture, stainless steel is used, the advantage of which is its high resistance to corrosion, thereby increasing the durability of the device.

If you want to extend the operational life of your equipment, it is recommended to install a filter on the water supply pipe through which water is supplied to the boiler, with the help of which the water will be purified and softened. Shut-off valves should be installed in front of the filter and on the return line, which will allow equipment maintenance and filter replacement to be carried out without unnecessary difficulties.

Features of operation of the gas boiler Neva Lux

Only when you understand all the technical characteristics of the device can you proceed to familiarize yourself with the control system of the unit. Let us immediately note that the operation of the Neva Lux double-circuit gas boiler is very simple and convenient, despite its equipment and high operational efficiency.

On the equipment panel you can see two regulators, one regulates the heating of the hot water supply, the second regulates the temperature of the coolant that fills the heating system. If you set any regulator to zero, the corresponding circuit will turn off and no heating will occur. This is convenient in the summer, since it is possible to quickly turn off the heating system, but leave the unit working to heat sanitary water.

If you need to restart the equipment or reset the initially set parameters, just press the button located next to the temperature controls.

In order for the device to start working, it must be turned on and, using the regulators, set the desired temperature for heating the hot water supply and coolant. Note that as soon as the coolant heats up to the set temperature, the equipment will automatically turn off, which allows you to save a lot on heating due to low fuel consumption.

In case you will not live in the house for some time, a special program is provided that allows you to set the equipment to work at a minimum temperature, which will be sufficient only to ensure that the heating system does not freeze. In addition, the equipment can easily be programmed to turn on at a specific moment, for example, three hours before you arrive home from work.

If for some reason the gas supply to the wall-mounted double-circuit gas boiler Neva is turned off, it can be set to a mode that will not allow the system to freeze. The essence of this function is that the burner is turned off, and the circulation pump continues to operate, thereby ensuring the circulation of coolant throughout the system. Of course, the temperature of the coolant will drop, but while moving, the water will not freeze longer.

Boiler operation with air temperature sensor

If such a sensor is not installed, the gas boiler will turn on only when the temperature of the coolant drops below the specified limit that operates in the heating system. If a decision is made to install a sensor, it is recommended to place it in the farthest room of the house.

The main advantage of the Neva double-circuit wall-mounted gas boiler is that it is possible to install an external temperature measurement sensor. Such a sensor will allow you to regulate the heating of the coolant as accurately as possible, based on the outside air temperature.

The outdoor sensor should be installed only in a place where it will not be exposed to direct sunlight and wind, and it should respond exclusively to temperature changes.

If the installation is performed incorrectly, the boiler will turn on even at positive temperatures if a cold wind blows on it, and at negative temperatures it may not turn on if the sun's rays hit it.

The main advantages of gas wall-mounted heating boilers

The modern equipment of the Neva company is of high quality and reliable in operation. If, when choosing equipment, you carefully study reviews of the Neva Lux double-circuit gas boiler, you will find out that this equipment is made only from high-quality materials and using modern technologies. The main advantages of gas wall-mounted boilers from Neva:

• possibility of reconfiguration for operation on liquefied gas;
• built-in multi-level security system;
• modern design, which allows you to install the device indoors, for example, in the kitchen;
• high quality and reliability of equipment;
• ability to continue to operate stably at low gas and water pressure;
• high efficiency;
• low price for a double-circuit wall-mounted gas boiler Neva Lux.

All of the above, as well as many other (especially the last) advantages explain its popularity among buyers. But what do the buyers themselves say about the equipment in question?

Customer reviews about wall-mounted double-circuit heating boilers from the Neva company

Just recently I bought a gas boiler from the Neva company. I don’t know what will happen next, but today the equipment simply pleases with its technical capabilities. At any convenient moment I can open the hot water tap, and here it is, a miracle - boiling water flows. There are no controls at all, I came up, set the temperature and the room was warm and comfortable. In a word, I was satisfied.

Andrey Nikolaevich, Moscow

The equipment, of course, is cool, convenient, easy to use and, most importantly, economical. The installation process was simple and straightforward; there were absolutely no difficulties or problems.

An acquaintance advised me to buy a Neva boiler, I somehow had some doubts at once, but after familiarizing myself a little with the technical characteristics, and also finding out how many positive aspects the equipment from this manufacturer has, I decided to buy. To be honest, I did not expect that the Neva boiler would be able to perform its tasks so efficiently and reliably, and most importantly, stably and economically. Now my house is warm and cozy and all thanks to the Neva wall-mounted gas boiler. I would like to express my gratitude to the manufacturer for his responsible approach in the production of this equipment.

Wall-mounted double-circuit gas boiler Neva Lux: reviews, price

Wall-mounted gas boilers are in great demand among consumers who have a house or small cottage. This is due to the advantages of this type of equipment. Thus, the wall-mounted boiler has small external dimensions, due to which the equipment can be installed indoors with minimal loss of space. The equipment does not make noise during operation and is capable of stably performing assigned tasks, regardless of operating conditions. Many users choose the Neva Lux double-circuit gas wall-mounted boiler for installation in the heating systems of their homes, the advantages and main technical characteristics of which will be discussed below.

Main technical characteristics and features of Neva company equipment

Please note that wall-mounted gas boilers on the market are available with open and closed combustion chambers. What does it mean? In the first case, combustion products are removed naturally, through the chimney to which the device is connected. The air required for normal gas combustion is taken from the room.

In the second case, the gas boiler is connected to a coaxial chimney, the design of which is made according to the “pipe-in-pipe” principle. Through the inner pipe, combustion products are forced out, thanks to the built-in fan, and air is supplied through the outer pipe, which comes from outside the room.

Wall-mounted double-circuit gas equipment is capable of performing two tasks aimed at heating the coolant and sanitary water. Heat exchangers are installed separately, one is designed to heat the coolant, the second is designed to heat sanitary water.

Household appliances of this type are distinguished by a wide power range, which allows you to select a unit for installation in an autonomous heating system for a house of any size. When choosing a device, it is important to consider that 1 kW is needed to normally heat 10 m2. So, if a house, for example, has an area of ​​200 m2, in which there is a need for hot water supply, then in order for the system to operate stably, efficiently and economically, you will need to buy a Neva double-circuit gas boiler of any model with a capacity of 24 kW.

Design features of the Neva boiler

Despite the fact that the Neva wall-mounted boiler is small in size, its design contains everything necessary for stable and high-quality operation of the equipment. Therefore, having chosen these heating boilers, you will not need to buy a separate circulation pump or expansion tank, the task of which is to promptly remove air from the heating system. According to experts, the built-in expansion tank can significantly increase the safety, reliability and stability of the heating system.

The main advantage of a built-in expansion tank from a remote tank is that there is no need to constantly check the coolant level; the equipment will do this for you. In addition, since there is no need to install an expansion tank, it is possible to significantly save on the installation of the heating system.

All models of gas boilers presented by Neva are equipped with pressure gauges, which are installed on the equipment panel. It is important to know that as the temperature increases, the pressure in the system increases and vice versa. The system should be replenished if the pressure drops below 1.5 atmospheres. Note that Neva wall-mounted appliances are able to continue to operate effectively at reduced gas and water pressure.

Let's return to the contours of the device, namely the one that is responsible for heating sanitary water intended for everyday needs. So, for its manufacture, stainless steel is used, the advantage of which is its high resistance to corrosion, thereby increasing the durability of the device.

If you want to extend the operational life of your equipment, it is recommended to install a filter on the water supply pipe through which water is supplied to the boiler, with the help of which the water will be purified and softened. Shut-off valves should be installed in front of the filter and on the return line, which will allow equipment maintenance and filter replacement to be carried out without unnecessary difficulties.

Only when you understand all the technical characteristics of the device can you proceed to familiarize yourself with the control system of the unit. Let us immediately note that the operation of the Neva Lux double-circuit gas boiler is very simple and convenient, despite its equipment and high operational efficiency.

On the equipment panel you can see two regulators, one regulates the heating of the hot water supply, the second regulates the temperature of the coolant that fills the heating system. If you set any regulator to zero, the corresponding circuit will turn off and no heating will occur. This is convenient in the summer, since it is possible to quickly turn off the heating system, but leave the unit working to heat sanitary water.

If you need to restart the equipment or reset the initially set parameters, just press the button located next to the temperature controls.

In order for the device to start working, it must be turned on and, using the regulators, set the desired temperature for heating the hot water supply and coolant. Note that as soon as the coolant heats up to the set temperature, the equipment will automatically turn off, which allows you to save a lot on heating due to low fuel consumption.

In case you will not live in the house for some time, a special program is provided that allows you to set the equipment to work at a minimum temperature, which will be sufficient only to ensure that the heating system does not freeze. In addition, the equipment can easily be programmed to turn on at a specific moment, for example, three hours before you arrive home from work.

If for some reason the gas supply to the wall-mounted double-circuit gas boiler Neva is turned off, it can be set to a mode that will not allow the system to freeze. The essence of this function is that the burner is turned off, and the circulation pump continues to operate, thereby ensuring the circulation of coolant throughout the system. Of course, the temperature of the coolant will drop, but while moving, the water will not freeze longer.

Boiler operation with air temperature sensor

If such a sensor is not installed, the gas boiler will turn on only when the temperature of the coolant drops below the specified limit that operates in the heating system. If a decision is made to install a sensor, it is recommended to place it in the farthest room of the house.

The main advantage of the Neva double-circuit wall-mounted gas boiler is that it is possible to install an external temperature measurement sensor. Such a sensor will allow you to regulate the heating of the coolant as accurately as possible, based on the outside air temperature.

The outdoor sensor should be installed only in a place where it will not be exposed to direct sunlight and wind, and it should respond exclusively to temperature changes.

If the installation is performed incorrectly, the boiler will turn on even at positive temperatures if a cold wind blows on it, and at negative temperatures it may not turn on if the sun's rays hit it.

Gas boiler Neva Lux - video

The main advantages of gas wall-mounted heating boilers

The modern equipment of the Neva company is of high quality and reliable in operation. If, when choosing equipment, you carefully study reviews of the Neva Lux double-circuit gas boiler, you will find out that this equipment is made only from high-quality materials and using modern technologies. The main advantages of gas wall-mounted boilers from Neva:

• possibility of reconfiguration for operation on liquefied gas;
• built-in multi-level security system;
• modern design, which allows you to install the device indoors, for example, in the kitchen;
• high quality and reliability of equipment;
• ability to continue to operate stably at low gas and water pressure;
• high efficiency;
• low price for a double-circuit wall-mounted gas boiler Neva Lux.

All of the above, as well as many other (especially the last) advantages explain its popularity among buyers. But what do the buyers themselves say about the equipment in question?

The domestic gas boiler Neva Lux was developed taking into account the operating experience of consumers and with certain complaints related to the operation of heating equipment. As a result, several modifications were developed that combine several attractive qualities: rich functionality, ease of control, and are fully adapted to domestic operating conditions.

History of the Neva brand

Initially the enterprise was called "Gazapparat". The main profile was the production of any gas equipment, including: columns, heaters, boilers. Today the enterprise belongs to the large concern “Baltic Gas Company”.

It was thanks to this alliance that the “Neva Lux” heating equipment models and the new “Turbo” product saw the light of day. The malfunctions of the boilers of the first releases were taken into account and corrected in subsequent modifications. As a result, the company offers the consumer a product with European build quality.

Review of the Lux boiler line

The company's new product is the Turbo boiler

Neva Turbo boilers are, in fact, a modified version of the already familiar Lux modification, taking into account the shortcomings of previous versions. The models have the following technical characteristics:

Turbo boilers are energy-dependent. The boiler is powered by connecting to a regular 220 V mains voltage. For stable operation, you will need to install a UPS and a generator.

Ease of maintenance and operation

It is enough to connect the installation to the heating and power supply system and start heating your house or apartment. In practice, provided the heating system is already ready, all work takes about 3-4 hours.

After installation, there is no need to worry about the safety of the station. The sequence of operation of the automation completely eliminates the possibility of gas leakage and the creation of an emergency situation, even if an unplanned power outage occurs.

The main differences between Neva boilers

The Turbo modification provides economical gas consumption and, subject to proper operation, fully pays for itself within a few years.

The Neva company produces gas boilers of the Luxe series of single-circuit and double-circuit types. Single-circuit gas boilers are manufactured for heating residential premises. This series is characterized by energy independence, budget cost and ease of maintenance. Neva Lux double-circuit gas boilers are equipped with closed and open combustion chambers. These boilers are equipped with a bithermic heat exchanger. Boilers are available in classic and coaxial chimney types. The series is equipped with high-tech automation.

Neva Lux boilers have the ability to connect two heating systems, and in some modifications, outlets are built in for organizing heated floors. The domestic company Neva produces innovative gas-type boilers of the Lux series, which take into account the shortcomings of previously produced models. The manufacturer installed modern automation and changed the design, but the cost of such boilers is much lower than similar models from European manufacturers. The pricing policy of Neva Lux gas boilers depends on the model. So the cost of double-circuit boilers is an order of magnitude lower than that of single-circuit boilers.

Capabilities of Neva Lux boilers

The Neva Lux gas boiler is considered ideal from a technical point of view. These boilers embody all the technical advances in the field of heating equipment and electronic control of heating circuits. The boilers have become famous due to their budget cost and the following features:

• compact dimensions;
• adaptation of all models to Russian conditions;
• the presence of a circulation pump manufactured by Neva, which facilitates installation of the boiler;
• Due to the indirect heating boiler, hot water is supplied;
• a fan is connected for forced smoke removal;
• It is possible to connect a room thermostat.

Control system for gas boilers Neva Lux

The Neva Lux gas boiler has a control system, which consists of an electronic unit. Boiler Neva ensures safety and controls the operation of the boiler. This system also includes a wiring harness that connects the electronic board, electrical wires and other devices into a common system. It also has a hydraulic system consisting of an auto-bleed valve, a secondary heat exchanger for hot water supply systems, a pump for forced circulation and a heat exchanger for heating the coolant. The smoke removal system includes a chimney and a fan that removes combustion products. And the adjustment and adjustment system consists of a temperature sensor for the heating circuit, a gas supply sensor to the burner block, as well as a temperature sensor and flow sensor for the DHW circuit.

When building a new house, one of the mandatory stages is the installation of a heating system and installation of a boiler. And in those houses where renovations are being carried out, new owners also often replace old batteries and replace the boiler with a more modern one. But which boiler to choose is a different story. Today, many people prefer automatic boilers, which can be mounted on the floor or on the wall. One of the brightest representatives of wall-mounted gas boilers is Neva Lux 8224, with two circuits (hot water supply and heating) and a closed combustion chamber.

One independent circuit is the heating system. The boiler power (24 kW) is quite enough to heat a living space up to two hundred square meters. The “burner - heat exchanger” complex itself is arranged in such a way that almost optimal heat exchange occurs when heating water. So the figures stated in the passport opposite the “Efficiency” column - 90% - are very close to reality. There is a built-in water pump inside the boiler, which ensures forced circulation of water in the heating system. Although modern radiators have drain valves to remove air pockets from pipes and radiators, the heating system is not at risk of airing. The existing 4-liter expansion tank will ensure the removal of excess air from the system, since ultimately all the water passes through it.

By the way, a built-in expansion tank with an air valve is one of the best technical solutions when designing a heating system in a house. Now gone are the days when the expansion tank for old gas boilers was placed on the supply pipe and was often taken to another room (or even to an unheated attic). Checking the water level in the tank, protecting it from freezing - all these concerns are “things of a bygone day...”.

The water pressure in the system can be controlled by the pressure gauge on the front panel of the boiler. As the temperature increases, the water pressure in a closed heating system increases. And with the onset of spring, when the heating temperature is lowered, the pressure may drop. If the pressure is too low, the heating system can be additionally topped up with water.

Hot water supply has its own separate circuit, which is in no way dependent on heating. Both circuits are heated by one heat exchanger. The entire water part of the boiler (internal pipes, heat exchanger, water pump, pressure and flow sensors) is quite sensitive to water quality. Therefore, when installing a boiler and installing a heating system, it is imperative to take care of installing coarse and fine filters on the supply pipelines in order to prevent particles of scale or rust (or other debris) from entering the internal parts of the boiler. Repairs (pump repair, sensor replacement) can cost a pretty penny.

Yes, and water purified from mechanical impurities may contain an increased content of dissolved salts and/or metals. So over time, the pipes, pump impeller and (especially) the heat exchanger may become clogged with salt deposits -. To prevent this from happening (if you know that the quality of the water leaves much to be desired), it would not be superfluous to install additional filters of the so-called chemical preparation.

Another distinctive feature of the boiler Neva Lux 8224 is a closed combustion chamber. Air intake for gas combustion occurs through an external pipe directly from the street. A chimney is located inside the duct using the “pipe-in-pipe” principle. Both systems, the air duct and the chimney, have their own fan for forced circulation. Now you don’t have to worry that this won’t happen at low pressure or strong gusts of wind. Even if there is a storm warning “overboard”, the flue gases are forcibly removed from the burner by a powerful fan. In return, combustion air flows through the duct.

The only condition for this type of coaxial chimney is to observe a slight slope of the chimney to the horizontal plane during installation. This is done so that the condensate that occurs in the chimney at subzero temperatures does not enter the boiler, but flows out through the pipe.

And now a few words about the control of the Neva Lux boiler and its capabilities. Even a third grader can control the boiler with some skill. There are two temperature regulators on the front panel (one for hot water supply, and the second for heating). If you set the regulator to “zero”, this circuit is considered off. So you can adjust the temperature easily and naturally.

There are two buttons next to the display. One is for selecting boiler operating modes (several automatically set operating modes), and the second is for resetting the boiler operating parameters and rebooting the control unit. This is for an emergency. You can also use the remote control to control the boiler, and set operating parameters and adjust the temperature without leaving the couch.

The operation of the Neva Lux boiler is based on the “turn it on and forget it” principle. That is, having set the temperature or operating mode of the boiler once, you don’t have to worry about its further operation. Even if the electricity suddenly goes out, then when it is turned on again, the boiler will again return to the same operating parameters as before it was turned off. For scrupulous homeowners, several “economical” modes are provided. If, for example, you leave home for a long time (on a business trip, to study, etc.), then Neva can be set to the minimum temperature mode and set the date and time on the timer to turn on the heating mode. The entire time you are away, the boiler will maintain the minimum temperature in the house (saving gas), and a few hours before your arrival it will turn on the burners at full power and warm up the house.

And if a situation arises when, for unknown reasons, the gas supply stops (some kind of accident on a gas pipeline in winter), then the boiler can be transferred to the “anti-freeze” mode. In this case, Neva will force water through the heating system when the burner is turned off, so that the coolant (that is, water) does not freeze in the pipes for quite a long time.

There is also the possibility of connecting a remote room temperature sensor to the boiler. The idea is that the boiler would turn on for operation not when the water temperature in the heating system drops, but when the air temperature in the rooms drops below a predetermined threshold. To do this, we place the sensor in the farthest room and establish communication with the boiler. And while the temperature in the room remains above the set point (say 25 degrees), the boiler is silent. As soon as the room gets cold, a command is given to turn on the burner. It is possible to install several temperature sensors in different rooms.

Additional options may include connecting an external “street” temperature sensor. Which controls the operation of the boiler depending on the outside air temperature. But this method is not very reliable. The fact is that the sensor may be blown by cold winds or there will be increased air humidity, and then even at above-zero temperatures there will be a command to turn on the boiler.

A short summary (of sorts). In general, we have a very modern, easy-to-use device that combines, in fact, a boiler and a water heater “in one bottle.” Neva Lux 8224 is reliable in operation. Even if any problem occurs, there will be no problems with repair and maintenance. There are always components in stock. The weak point of the boiler, in general, like all computer-controlled “wall-mounted” systems, is its vital dependence on electricity. All modern gas boilers suffer from this, even. There is no electricity - the boiler is silent. So if in your area there is a risk of unexpected and long-term power outages, then, firstly, it is worth equipping the boiler with a voltage stabilization system (so as not to inadvertently destroy the most expensive part of the boiler - the control board). And secondly, if possible, then get a diesel (or gasoline) one, so that in case of an emergency shutdown there is an opportunity not to leave the boiler without power.