Among the huge variety of water heating equipment, it can be quite difficult for an ordinary consumer to choose a suitable model for a home. Knowledge of the basic principle of operation of devices, technical characteristics and design features will help to deal with this difficult issue. Together with the experts of the online magazine, the site will consider what it is. gas water heater Neva, criteria for choosing water heaters and a detailed review lineup.
Read in the article:
When the Neva gas water heater is used, its purpose
Despite the fact that in many modern houses a centralized hot water supply is organized, household gas water heaters have not lost their relevance. Such equipment provides comfortable living conditions for many inhabitants. Instantaneous heaters allow you to use hot water for domestic needs at any time convenient for consumers and not depend on the work of municipal utilities.
Among the huge number of imported and domestic gas water heaters on the market, it is worth highlighting the devices of the Neva brand. The products are manufactured at the Russian enterprise Gazapparat, equipped with modern automation and high quality assembly. All models are designed taking into account the peculiarities of the operation of domestic gas and water mains, which ensures the smooth operation of the equipment.
The general principle of operation of geysers Neva and their types
Consider the principle of operation of the Neva household water heating equipment and its varieties. The columns differ among themselves by the type of ignition of the incoming fuel, the design features of the chimney, power, weight and dimensions, the level of safety and the presence of additional functions.
The principle of operation of Neva dispensers is as follows: after opening the valve under pressure, water enters the cavity of the water-gas unit (12). It has a diaphragm that acts through the stem on the valve. After opening it, gas enters the main burner (10).
Thanks to the electrode, the gas is ignited using the ignition burner (3). In turn, the water rushes into the heat exchanger pipeline (2), where it heats up to a certain temperature and enters all the intake points in the dwelling. The principle of the Neva gas water heaters is practically the same type. All models have a long warranty period (for example, for the Neva 4511 brand it is 12 years).
Geysers Neva: basic technical characteristics
Performance
One of the main parameters of the Neva gas flowing water heater, which you should pay attention to when choosing a model, is its performance. The power of the column is determined by the volume of the incoming liquid, which the unit is able to heat during a certain period of time.
Columns Neva are low-power - 17-20 kW, medium capacity - up to 26 kW and high power - up to 28 kW. For a small family, a small unit of 17-18 kW is quite suitable. If large volumes of hot water are to be consumed, models with a capacity of 26-28 kW should be chosen.
Table 1. Ratio of column power and liquid flow rate
Maximum pressure
When choosing Neva water heaters, it is extremely important to take into account such a parameter as an indicator of water pressure, and its minimum and maximum values should be taken into account. In the first case, it must be at least 0.19 atmospheres, otherwise the column simply will not turn on. This is especially true of old buildings, in which the pipelines of the mains are badly worn out.
The maximum pressure value indicates the degree of stress that the column can withstand. For gas water heaters, it ranges from 9.9-11.8 atmospheres. It is known that water shocks of a certain force are quite often formed in water mains, which can completely destroy the structure of the heat exchanger.
Ignition type
In modern models of speakers for household use, different kinds ignition of burners. A little earlier, basically only the manual type was used, in which the gas was set on fire with an open fire.
Table 2. Types of ignition of household instantaneous water heaters
| Ignition type | Image | Description |
| Piezo ignition |  | A piezoelectric element can be used to ignite the gas in the columns. The ignition is carried out by pressing a button installed on the equipment panel. |
| Electronic |  | An autonomous power source (batteries) is installed in the column, which powers the electronic ignition unit. |
| Microturbine |  | Microturbine ignition is carried out by a hydrodynamic type generator. The water flow acts as a propeller, rotates the turbine, which generates current. The device is characterized by high reliability and long service life. |
Power modulation
Among the additional functionality that some models of Neva speakers are equipped with is power modulation. Thanks to a special device, users can regulate the flame. The degree of heating of the heat exchanger depends on its intensity. Regulation is carried out by decreasing or increasing the water pressure.
Using modulation, you can use water of a certain temperature, and the column will work normally, regardless of the number of storeys and pressure in the load-bearing main of the house. As practice shows, this function contributes to economical gas consumption. It also ensures the safety of users, protecting them from thermal burns.
Heat exchanger type
Before buying a Neva gas water heater, you should find out which heat exchanger is installed on it. The structural element It is made of steel, as well as copper of simple and high purity. In the first case, the equipment is inexpensive, has a lot of weight, and is characterized by high reliability in operation.
Heat exchangers made of plain copper are characterized by uneven heating. This is due to the presence of various impurities in the metal. For this reason, pipes fail quickly enough, since cracks form on their surface.
The most reliable are columns with high-purity copper heat exchangers. The heat transfer of such a design is significantly higher and, accordingly, the efficiency indicator. The cost of columns with a copper heat exchanger of this type is higher than analogues, however, they last much longer without the need for repair work.
Combustion products removal type
To date, the most widespread are columns with an atmospheric type of exhaust of combustion products - through the channels of the chimneys. After installing the water heater, an air duct is connected to its outlet funnel, which is connected to the ventilation shaft.
There are also turbine-type geysers. They are not connected to the ventilation shaft, they draw in combustion air from the outside and discharge exhaust gases outside. Such water heaters are used in residential and industrial buildings in which there are no chimneys.
Security systems
Since any gas equipment is potentially dangerous, manufacturers equip the columns with sensors. They form a safety system for the units that prevent emergencies.
Table 3. Sensors for gas water heaters
| Device | Appointment |
| Water pressure sensor | The device is designed to automatically turn off and turn on the gas supply during water intake into the column. |
| Ionization sensor | If the column dies out, the ionization sensor will work and instantly cut off the gas supply to the unit. |
| safety valve | If an increased pressure occurs in the column, the valves shut off the supply of water and gas to the system. |
| Temperature difference control device | The sensor monitors the difference in operating temperatures. The device is designed to increase or decrease the temperature of the water. |
| Additional thermal sensors | The devices duplicate the functions of the ionization sensor. If it does not work, they block the flow of gas into the column. |
| Heating status sensor | Used to control working temperature all units of the column and its heating elements. |
| Water and gas pressure sensor | The element is designed to control the supply of gas and water to the unit. For example, if the column is turned off and the water tap is open, gas will not flow into the system. |
| Traction control sensor | If the thrust is insufficient, the device will not allow the column to turn on. |
Lineup of gas water heaters Neva
Column gas Neva 4510
One of the popular models is the Neva 4510 geyser. The unit is equipped with an electronic automatic system ignition. The productivity of the water heating equipment is 10 l / min.
The column turns on at a minimum pressure of 0.29 atm, the power is 17 kW, and the weight of the device is 10.4 kg. The model is characterized by low fuel consumption. Thus, Neva 4510 consumes 0.77 m³ / h of liquefied gas, and natural gas - 1.95 m³ / h. The dimensions of the device are 648 × 356 × 218 mm.
Column gas Neva Lux 5514
Neva Lux 5514 is one of the best models household gas water heaters, which in terms of basic technical indicators is not inferior to well-known brands. TO design features the unit should include:
- presence of a thrust sensor;
- a reliable combustion chamber equipped with a water cooling system;
- automatic maintenance of the set water temperature;
- integrated piezo ignition;
- hydraulic control system for modulating flame intensity;
- automatic gas pressure level limiter.
The power of the water heater is 28 kW, the capacity is 14 l / min, and the device weighs 12 kg. These indicators are quite enough to ensure the uninterrupted operation of the unit for supplying hot water two sampling points at the same time. The column turns on automatically when the water tap is opened.
The water heater has dimensions: 650 × 350 × 299 mm. The product has a stylish modern design... On the front of the screen of the Neva Lux 5514 there is a rotary knob, thanks to which the operating parameters of the equipment are adjusted.
The presence of an electric ignition system provides an economical consumption of consumed gas, due to which the payment of utility bills is at a fairly low price. The gas water heater Neva Lux 5514 is characterized by stable silent operation, in addition, the appearance of unit malfunctions is quite rare.
Column gas Neva 4511
If you need a powerful instantaneous water heater, you should pay attention to the Neva 4511 model. It has an attractive design, high-quality assembly and high performance - in 1 minute of operation, the unit manages to heat 11 liters of water, the power indicator is 21 kW.
You can read how to properly connect the device to a water supply system, a gas main or a LPG cylinder in the operating instructions. According to user reviews, the Neva 4511 geyser perfectly copes with several points of consumption at the same time. The weight of the column is 11 kg, the dimensions of the device are 565 × 290 × 221 mm. The model is equipped with automatic electronic ignition and has a water-cooled combustion chamber.
Video: "Column Neva 411 does not light up - remedy"
Column gas Neva 4513
The household gas water heater Neva 4513 is equipped with an automatic electric ignition system. The rated power of the model is 25 kW, the unit capacity is 13 l / min. Weighing 15.8 kg, the dimensions of the product are 665 × 390 × 237 mm. The column has a water-cooled combustion chamber.
Neva 4513 is easy to operate, has a long service life and a high degree of safety. The capacity of the unit is quite sufficient for hot water supply to several consumers at the same time.
Technical characteristics of the gas column Neva 3208
Flow model gas water heater Neva 3208 can operate at a minimum pressure of 0.15 atmospheres. With a rated power of the equipment of 23.2 kW, its capacity is 6.5 l / min. Installation of the column is carried out in a vertical position, the supply of highways - the bottom.
The device weighs 19.5 kg, and its dimensions are 730 × 390 × 280 mm. The column is equipped with an electric ignition system. If the Neva column does not ignite, most likely the breakdown is a malfunction of the heat exchanger. It is eliminated by flushing the pipeline.
Column gas Neva Transit
We will consider the features of the operation of a column of the Neva Transit family using the example of the VPG-EM model (there are also VPG-E I, VPG-E, EMT with a capacity of 12-24 kW, with a capacity of 6-12 l / min). Flow-through units maintain the set temperature for heating the liquid in automatic mode.
The column has a gas modulation device: by changing the position of the rod, you can reduce the amount of fuel consumed and increase the heating efficiency. In addition, the amount of deposits in the heat exchanger piping is reduced, due to which the operating life of the unit is significantly increased.
How to choose a gas water heater Neva
We have already considered the main parameters that should be taken into account when choosing a geyser model. It also depends on how many sampling points the column should provide. So, for small apartment excellent option there will be a purchase of the Neva 4510 model. The capacity of 17 kW will be enough to provide hot water supply.
If a more powerful unit, the choice is obvious - the Neva Lux 5514 gas water heater. According to the reviews of many users, the price of the model fully justifies itself. In addition, it should be borne in mind that for many years you will not have to spend money from the family budget on repairs and maintenance of the unit.
The main problems and repair of the gas column Neva
Column Neva does not light up
If the Neva gas column does not ignite, first of all, you should check the electronic unit, which generates a spark. As a rule, the problem is solved by replacing it. It is quite simple to do this, for which you need to remove the front screen, then the fastening bolts are unscrewed and the supply wires are removed (the new unit is installed in the reverse order).
Why the Neva gas water heater does not turn on
Let us analyze the main causes of malfunctions of the Neva brand columns, due to which the equipment will not turn on and heat the water. They are typical for the entire model range. One of them is the lack of traction in ventilation ducts... The problem is solved by cleaning the chimney shaft, for which you should use a brush with steel fibers.
If the column has an automatic ignition system, you should check the operation of the generator, accumulators (batteries), as well as the power button. Most often, the unit does not turn on due to the fact that the batteries are dead. It is enough to replace them with new ones and clean up the contacts.
The weak pressure of the water and gas supply (there is a spark, the column does not work) will also prevent the device from turning on. The solution to this problem will be to call the specialists of the relevant services, who must clean the highways.
Where to find spare parts for the Neva gas water heater
Spare parts can be easily purchased from authorized dealers specializing in the sale of gas and water heating equipment. In most cities of Russia, there are representative offices of various manufacturing companies, where you can purchase certified products, which guarantees long-term operation of the devices. The same can be done in online stores (ask for quality certificates for the offered spare parts).
Domestic gas water heater Neva is a product domestic development, as well as the Astra and Oasis columns. From the name alone it becomes clear that the devices under this trademark are manufactured in St. Petersburg. To choose potential buyers many speaker models are presented, differing not only in performance, but also appearance... In total, there are nine model lines on sale. Advantages of geysers Neva from the manufacturer NevaGaz:
- The presence of flame modulation in advanced models - due to this, automatic maintenance of the set water temperature is achieved;
- A special series of designer columns - for those who appreciate beauty;
- The presence of ultra-thin models - for those who save space;
- The range of models for rooms without a chimney is an excellent solution for old and new houses;
- Affordable equipment cost - in comparison with similar models from other manufacturers, Neva gas water heaters are relatively cheap.
Each manufacturer is ready to praise their products at any time of the day or night. And what do users say about Neva gas water heaters? We will learn about this through the example of customer reviews.
What is the buyer looking for when he wants to buy a gas water heater? Of course, on the reviews of other buyers. Let's find out what the user reviews of Neva gas water heaters are.
Gas water heater Neva Lux 5514
We bought this column so that it could provide solid performance. With a power of 28 kW, this unit produces up to 14 l / h, and this is quite enough for taking a shower and washing dishes at the same time. Despite the fact that the Lux 5514 gas water heater is a domestic device, it works a solid five. The model is reliable, heats water very quickly, has an extremely understandable control - in fact, there is only one knob for adjusting the temperature. Somewhere I came across reviews that this column has a bad heat exchanger, but in fact it has served for 6 years and does not seem to be going to break.
Advantages:
- Amazing reliability for a domestic water heater;
- Affordable cost, analogues from foreign manufacturers are more expensive;
- Electronic ignition, starts automatically, as soon as you open the tap. The absence of an igniter allows you to save on gas.
Flaws:
- It seems to me that it is a little noisy, analogs are quieter;
- There is no automatic maintenance of the water temperature, therefore, when the pressure changes or the second tap is opened, the temperature changes slightly;
- Batteries need to be changed frequently, but she does not want to run on cheap batteries;
- Sometimes it goes out for unexplained reasons. Thank God that this happens quite rarely.
Gas water heater Neva 4511
We needed an inexpensive water heater from a well-known manufacturer, so my husband and I decided to opt for the Neva 4511 gas water heater. It works quite calmly with two taps, providing consumers with a sufficient amount of hot water. True, when the second tap is opened, the heating temperature changes slightly, but this is easily corrected with a mixer. Therefore, this behavior is not a disadvantage. There is a small display on the front panel that shows the hot water temperature. Nearby are two knobs for adjusting the temperature. A little above a small peephole to control the combustion of the gas. But the design of the column is as if it had been cut down with an ax from a single piece of iron - a mere rectangle. But it is quite reliable, although it is not devoid of certain drawbacks.
Advantages:
- Heats water quickly, no need to wait long for heating after switching on;
- Quite affordable price, analogues from imported brands are more expensive;
- For three years of work, it has not leaked, which indicates the reliability of the assembly and the heat exchanger;
- Convenient temperature and pressure control.
Flaws:
- Sometimes the gas does not ignite immediately, but after a few seconds, which causes a strong pop;
- When overheated, it starts to make noise, like a roaring engine at high revs. Noise appears after +50 degrees;
- Very slim body. Not a very important drawback, but still somehow undignified. Although now all equipment is made in such buildings, even washing machines.
Geyser Neva Transit VPG-10E
Anatoly
A simple gas water heater, cheap, but not without drawbacks. For example, it turns off regularly, as it overheats. What kind of logic is this - to save gas and not swim for more than 20 minutes? I had to change the sensor, although after a while it "faded". If the pressure drops, you have to adjust the heating temperature, otherwise you can simply burn yourself. It also seemed to me that it consumes batteries too quickly - the neighbors have the same column, so they change it about once every six months. Despite a bunch of shortcomings inherent in most inexpensive speakers, there were no serious breakdowns. Changed the rubber pads a couple of times as it was starting to drip, but the heat exchanger still feels fine, although the neighbors have already had to change it.
Advantages:
- No frills in design, just a strict white case with two knobs and an indicator;
- It ignites normally in the evening, when the water pressure traditionally drops;
- Electric ignition, you can save on gas - whatever you say, but a piezoelectric gas fuse does not work so economically;
- He knows how to work on liquefied gas, you can install a column in the country.
Flaws:
- There is no monitoring of the temperature, with a sharp change in pressure, you can get burned;
- There are no major breakdowns, only minor ones, but you have to look for a long time where the water is flowing from;
- Frequent spontaneous shutdowns for no apparent reason, replacing the sensor did not help for long.
Gas water heater Neva 4510
Probably nothing worse than this column has been invented yet. How could a model with such a flimsy heat exchanger be released? How could anyone even guess to make this thermally loaded unit from such a thin metal? A year has passed since the purchase, and leaks have already begun. It seems that this is an ordinary Chinese column in the Russian way - even the obvious shortcomings were not thought to be eliminated. It makes a lot of noise, water drips, periodically turns off. Recently, it completely stopped turning on the first time, you have to turn off the water and turn it on again. Replacing the batteries didn't help, and cleaning everything that could be cleaned didn't help either. I decided to completely change the heat exchanger, found out the price - I decided to add a little more money and buy a normal column. Why such insanely expensive parts?
In our everyday life, water heaters are becoming more and more popular. To prevent circumstances from catching us at the wrong moment, we strive to predict all situations.
Urban residents have become accustomed to disconnecting warm water. In the private sector, the problem of water heating has never disappeared. It is for such cases that gas water heaters are suitable.
Types of devices
The geyser is a water heater. Gas is the main source of energy.
The main criterion is the characteristics of the device, its quality and price.
Conditionally by technical specifications columns can be divided into types:
- by type of ignition;
- by the type of chimney;
- by power (on which the volume of heated water depends);
- on safety;
- to size;
- for additional functions.
As for the quality of the product, the popularity and popularity of the brand can be decisive. On the domestic market, NEVA is a quality manufacturer. This is confirmed by many reviews for the product. The quality of components and assembly is a guarantee of the reliability of the device.
Note: the service life of the NEVA 4511 column is guaranteed for 12 years from the date of installation, and warranty service is 2 years.
Column ignition
The ignition of the column means the ignition of the gas, namely the method, in the gas columns it happens:
- manual ignition;
- piezo ignition;
- electronic;
- microturbine.
Manual ignition is rare for modern speakers... In older models, matches were needed to ignite the gas. Such models are rare today.
Piezo ignition. By analogy with piezoelectric stoves, to ignite the gas, you need to press the button on the column panel. This method is still used in modern models.
Electronic. The most convenient and popular way. Reliability and economy in gas consumption make such models a little more expensive. By analogy with a car, a spark is created by a small battery, more often batteries are used. Column NEVA 4511 belongs to this model range.
As for microturbine ones, the current in them is generated by a hydrodynamic generator controlled by a water flow. The cost of such copies is much higher.
Columns with electric ignition are easy to operate. Gas is ignited automatically when you open a tap with water, thus you can save gas consumption.
Combustion products removal type
Columns of atmospheric type are commercially available. They discharge the combustion waste directly into the chimneys.
The proprietary range of NEVA speakers is represented by HSV models from 10 to 14 series, in various modifications.
Turbine columns are not connected to the chimney, they take oxygen for combustion from the outside and the combustion products are thrown there. They are intended for installation on any floor in a building in houses without chimneys. The higher price is justified by the convenience of their use, since it is much more expensive to build chimneys.
Power
The power of an instantaneous water heater is determined by the volume of water that it can heat. To heat a large amount of water, you will need a powerful unit.
According to their power, the speakers can be divided into:
- power from 17 - 20 kW (small speakers);
- from 20 - 26 kW (average);
- from 26 - 28 (high power).
Column NEVA model 4511 consumes 21 kW, but at the same time produces up to 11 liters of hot water per minute. For an approximate definition of liters per minute, refer to this table:
Column NEVA 4511 is suitable for two draw-off points. If you need to use more points, it is better to take a speaker with more power. Column NEVA 4511 is the most compact of the entire series and is suitable for small rooms. More powerful speakers NEVA from the Lux series.
Safety in use
A gas water heater is a device of increased danger.
For ease of use and prevention of various accidents, the speakers are equipped with additional sensors. Among which:
- Ionization sensor. In the event of a fire extinguishing, the sensor shuts off the gas supply.
- Additional thermal sensors. They are triggered if the ionization sensor does not work.
- Heating sensor. Monitors the temperature of the flow heater, i.e. regulates the temperature of the entire device as well as the heating elements.
- A water pressure sensor, the main task of which is to turn on or off the gas supply automatically when drawing water.
- Temperature difference control sensor. The device for raising and lowering the water temperature, in case someone additionally opened the water, is implemented in the newer Neva Lux models, model 4514, 4513.
- Gas and water pressure sensor. They control the supply of water or gas to the column. In case of opening the tap with water, when it is turned off, the column will not supply gas automatically.
- Safety valves. Shut off the water or gas supply in case of increased pressure in the system.
Features of domestic systems
This means that when the gas pressure drops below 13 mbar, the column continues to operate.
At the same time, the automation does not allow turning on the device at low pressure. Gas supply in our territorial latitudes is a secondary problem. The main task is to control the water pressure.
Take into account: the Neva 4511 column turns on at a pressure of 0.2 atmosphere, but long-term operation undesirable in such conditions.
An important advantage of the Neva and Neva Lux columns is a replaceable heat exchanger. Instead of buying a new speaker, it is enough to purchase a component part. It costs from 3,500 to 4,500 thousand rubles, depending on its type. In new models, copper heat exchanger, such a material is resistant to corrosion, but salt and scale deposits remain a problem.
Serving the Neva
Solenoid valve breakdowns are common. When opening the tap, you hear the click of the electric ignition, but no gas is supplied.
Gas flows through the solenoid valve to the burner. Replacing it is not difficult, just like the heat exchanger, it is sold separately. Fastened to the column with screws. The valve diameter is standard, therefore, knowing the model of your column, you can replace it in a matter of minutes.
For installation works for the installation of gas equipment should only be involved professional specialists authorized to carry out work. Before installation, they check for gas leaks in the system.
Note: It is categorically not recommended to independently install any gas equipment, especially a column. Specialists, following the instructions, follow the rules for connecting to a gas source and a water supply system.
You should pay attention to the manufacturer's warranty. You need to know in advance how to get it. Installation of the column is possible only upon obtaining the right to commission.
For the first start-up of the device, it is necessary to call the specialists of the service center to obtain a mark in the warranty card. Only then does the warranty certificate come into force. Also, the column must be installed officially, i.e. in agreement with local economic authorities.
It would seem that all the additional functions built into the column are automatically adjusted. But this does not mean that nothing depends on you.
Master's advice: better limit the leaving water temperature. At high temperature water accelerates the formation of salts and scale on the heating element.
Consider the hardness of the water in your piping system. Repairs and maintenance in the event of breakdowns must be carried out by qualified personnel.
It is necessary to clean the burners and the heating element, and also to clean the entire device from dust and dirt. If used correctly, the column will last long time.
Watch a video in which the specialist describes the features of the device and the Neva 4511:
Since the Neva 4511 series geyser is one of the most common models, the topic of its maintenance and repair is of interest to many users who are accustomed to doing such work with their own hands. Indeed, these open-chamber instantaneous water heaters can often be brought back to life without the need for service personnel. Let's look at what malfunctions occur during the operation of these units, as well as ways to eliminate them.
The device and principle of operation of the model Neva 4511
It is impossible to independently repair a household appliance without knowing how it functions and what it consists of. Unlike old-style water heating devices, this series of gas water heaters is equipped with a controller and electric ignition, which made it possible to remove a constantly burning igniter. The rest of the design remained fairly simple and maintainable. It consists of the following basic elements:
- Housing with hinges for wall mounting.
- The diffuser is a collection of combustion products with a chimney pipe.
- Copper heat exchanger.
- Gas burner device.
- Water node.
- Membrane actuator (so-called frog).
- A gas valve with an electromagnet, connected by a common stem to a water unit.
- Controller.
- Microswitch for power supply to the electronic unit.
- Water supply pipes.
- Ignition electrode.
- Flame detector (ionization).
- Additional electrode for ignition of the burner.
- The valve is a flow regulator.
- Adjustment of the intensity of combustion and heating temperature.
- Connection of a draft sensor installed inside the diffuser.
- Compartment for batteries (batteries).
The diagram above shows the device of the Neva gas column with numerical designations of parts corresponding to the list.
Automatic switching on and heating is controlled by the water unit together with the controller, and the solenoid valve connected to the draft sensor is responsible for the safe gas supply. The algorithm for the operation of a water heater looks like this:
- After opening the hot water tap at the inlet of the "frog", pressure arises, which acts on the rubber membrane of the assembly. It moves the stem that opens the gas valve and closes the microswitch contacts.
- When the electrical circuit is closed, battery power is supplied to the controller. He gives 2 commands at the same time: open the solenoid valve for gas passage and create a spark on the ignition electrodes. As a result, the burner ignites.
- The flame sensor detects the appearance of fire and transmits a pulse to the electronic unit, which interrupts the sparking. The heater switches to operating mode.
- When the valve on the mixer is closed, the pressure in the network disappears and the spring throws the frog diaphragm back, at the same time closing the mechanical gas valve. The limit switch is triggered and the controller loses power, and with it - the electromagnet. The fuel supply is interrupted and the burner is extinguished.
The fundamental point. The solenoid valve is connected in one circuit with the draft sensor (pos. 16 of the diagram). If, for various reasons, the draft in the chimney disappears or weakens, the sensor will heat up and open the circuit, de-energizing the electromagnet. The latter will return to the closed position and cut off the gas supply to the burner.
To exclude possible overheating of water in the heat exchanger, the manufacturer has implemented a simple technical solution: a temperature sensor connected to the controller is built into the pipeline. If the flow heats up to a critical level (about 90 ° C), then the gas supply will automatically stop and the burner will go out. The structure and principle of operation of the Neva 4511 column is shown more clearly in the video:
Water heater repair
In order to fix the malfunction of the Neva gas column with your own hands, you need to diagnose it correctly. Over the years of operation of the water heating apparatus, one part of the parts wears out and requires replacement, the other - periodic maintenance. In this case, a variety of problems arise, characterized by certain symptoms. We propose to divide all emerging problems into groups according to the following criteria:
- the burner does not light up when opening the tap of the DHW system;
- after working for 5-10 seconds, the unit turns off;
- the flow heater starts up and functions properly, but does not heat the water well;
- other problems.
Advice. Most often, the rubber membrane of the water unit fails in gas water heaters - it stretches, cracks or breaks. This is a consumable part that should always be kept in stock. A sample of the part is shown in the photo.
What to do if the column does not light up
When the water heater does not react in any way to the inclusion of hot water, you need to perform the simplest action - check the condition of the batteries and the contacts of the battery compartment (they can oxidize). Clean them with sandpaper, install a new set of batteries, and then try firing up again.
An important point. Luminous display household appliance does not at all indicate a full charge of the batteries, since it does not consume much energy. If the batteries are "hung up", then the voltage for triggering the electromagnet and sparking may not be enough. According to the specifications published on the official website of the manufacturer, the set of elements is enough for about 250 hours of operation.
Battery compartment location - bottom view of the device
Is the power supply ok? Then continue diagnosing the gas water heater using this algorithm:
- Make sure that there is enough pressure in the piping to turn on the device. It is possible that someone accidentally closed the shut-off valve or control valve on the heater itself (on the right).
- If there is a strainer on the incoming water supply, check its condition and clean if necessary.
- Remove the front panel of the device and open the DHW tap, observing the stem. If it does not move under normal water pressure, the reason lies in the frog's membrane.
- The stem has moved, released the switch button, but nothing happens? There is a problem with the electrical circuits. You need to check the microswitch and ring the other wires supplying the controller and solenoid valve.
Advice. When repairing the Neva gas water heater, accompanied by disassembling the unit, just in case, shut off the gas main.
To dismantle the front casing, it is necessary to remove the plastic handles from the control valves and disconnect the display connection connector. At the back, the panel is supported by 2 self-tapping screws located at the bottom of the device. Unscrew them and remove the cover by pulling it towards you and pulling it up.
To check the limit switch, you must disconnect the connector and ring it with a multimeter or lamp tester. When the button is pressed, the circuit must be open. As for the wiring, it rarely fails, unless you catch your eye on a fallen off wire, which is easily removed.
To replace the membrane in the Neva 4511 column, remove and disassemble the water unit together with the gas one, following the instructions:
- Close the feed cold water and gas, unscrew both supply pipes with an open-end wrench. Also disconnect the copper pipe leading to the heat exchanger.
- Disconnect the controller and microswitch connectors.
- The entire water / gas block is fixed with 2 screws to the burner flange. Unscrew them with a Phillips screwdriver and remove the assembly.
- Disassemble the frog and replace the membrane, and with it the small O-ring shown in the photo.
Note. The replacement can be done without dismantling the whole block, but it is extremely inconvenient to perform the operation in this position. The described disassembly technology is also suitable for other models of gas water heaters - Neva Lux 4510, 5611 and so on.
How the membrane of an instantaneous water heater changes, see the next video:
There is a spark - no ignition
When sparking is visible on the spark plug but the burner is idle, check the following points:
- whether the spark electrode has moved relative to the nozzle;
- whether the traction or overheating sensor that opens the solenoid valve circuit is out of order;
- does it pierce a high-voltage wire onto the case;
- spark has diminished due to plugged plug or battery discharge.
The electrode should be located directly above the nozzle of one of the burner sections at a distance of no more than 5 mm from it. A violation of the position of the candle is corrected by simple bending. Sometimes it is enough to clean the end of the electrode from soot to increase the spark power.
The operation of the traction and overheating sensors is checked by direct closure of their contacts. Place jumpers on each device in turn, including the water on the faucet. If a flame appears, replace the faulty sensor.
After starting, the burner goes out
If the flame in the column lights up properly together with the appearance of a water draw, and after 5-10 seconds it goes out, then the reasons may be as follows:
- the ionization sensor does not work (does not detect the ignition of the fuel);
- there is no draft in the chimney, which is why the corresponding sensor overheats and opens the electrical circuit;
- the maximum heating is set at a low water consumption, which is why its temperature quickly reaches 90 ° C and the overheating sensor is triggered.
The last 2 malfunctions do not depend on the water heater and are eliminated by the user on an individual basis. Sometimes the damping effect is created by a diaphragm that is too stretched: at the first moment after water is supplied, it moves the stem, and when the pressure in the pipe is normalized, it releases again.
The flame sensor fails for three reasons:
- The electrode is covered with a thick layer of soot and requires cleaning.
- The "nose" of the device is bent down from prolonged exposure to temperature and needs to be slightly bent up, as shown in the video.
- The device is out of order and needs to be replaced.
The opposite situation also happens: the DHW tap is closed, and the burner continues to work. Here there is a jamming of the stem, which is eliminated by disassembling and cleaning the water-gas block.
How to eliminate weak heat
There are two reasons for this phenomenon: clogging of the burner nozzles and deposits in the heat exchanger tubes. In the first case, a change in the blue color of the flame to yellow or reddish is noticeable, the gas burner device begins to smoke. To eliminate it, it is advisable to call the gas service master, but if necessary, you can handle it yourself:
- Shut off the gas supply.
- Dismantle the burner by unscrewing the compression nut on the gas line and 4 screws not shown below.
- Blow the knot in an accessible way dust and then wash with a mild soapy solution.
- Dry the device and re-assemble the column in reverse order.
If the burner operates properly, but the water does not heat up, then the heat exchanger must be flushed. The factory - the manufacturer provides for a simplified dismantling of the element: drain the water from the column, unscrew the two connecting nuts on the pipes (shown in the photo with green arrows) and 2 fastening screws from above. Then immerse the heat exchanger in a bucket of solution citric acid(100 grams per 1 liter of water) and wait until it corrodes the scale. After thoroughly rinsing and drying, reinstall the element.
Advice. When reassembling the heat exchanger, it is advisable to change the rubber gaskets inside the union nuts.
Conclusion
This is not to say that it is unrealistic or unacceptable to repair the Neva gas water heater yourself. You can really cope with the common malfunctions described above on your own, and without any special tools. It should be remembered that the water heater belongs to gas-powered equipment that requires a careful and thorough approach.
Design engineer with over 8 years of experience in construction.
Graduated from East Ukrainian National University them. Vladimir Dahl with a degree in Electronic Industry Equipment in 2011.
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Due to frequent blackouts of hot water, many residents of apartments began to install gas water heaters and water heaters... In their own houses, the owners are privately engaged in hot water supply and other household issues. Most of the owners of cottages and houses install gas water heaters. Neva 4511 is considered the most popular model of gas water heaters. What are its characteristics and reviews after operation?
Description
The old and inconvenient speakers were replaced by new compact and modern units. Such products satisfy the needs of many consumers. The devices are equipped with modern automation and have a multi-stage protection system. This is very important feature as it provides increased safety during operation.
Popular models the gas water heater Neva 4511, which is produced by the Baltic Gas Company, belongs to. The company has been operating since 1995 and is the country's leader in the production of household and industrial gas equipment. The company sells its products wholesale and retail at low prices, which can be seen on the official website. The sales market is open throughout the country and there are more than 1500 settlements selling gas equipment and spare parts. The company's products have combined advanced European technologies and the experience of Russian engineers.
The Neva 4511 model is designed for very fast heating of water in a private house or apartment. The gas water heater is mounted vertically, joining a natural draft chimney to remove combustion products. The column is designed for 2 points of water intake... Two types of fuel are used for work - liquefied or natural gas.
The front part is equipped with knobs for regulating the flow of gas and water, as well as a display. The process of operation of the column starts after opening the tap with hot water. At this moment, the electronic automatic ignition system is triggered. It emits sparks and operates on battery power.
It is worth mentioning separately about the safety of the device. According to the operating instructions, the unit automatically shuts down when:
- there is no water or the ignition burner is damping;
- heating the liquid over 80 ° C;
- in case of violation of draft in the chimney.
Manufacturers give a 2-year warranty for the product. The operating period of the geyser according to the Neva 4511 instructions is up to 12 years.
Specifications
The geyser Neva 4511 has a rectangular shape, ergonomic classic design... It is faced with a white or silver panel. The cladding affects the price of the product... Silver coating will cost more. Details can be seen on the official website of the company. The column has compact dimensions and low weight, only 10 kg. Its width is 29 cm, height - 56.5 cm, depth - 22.1 cm.
The column heat exchanger is a two-tier type made of copper and does not contain lead and tin impurities. The increased pipe diameter protects against scale build-up. A unique burner is made of stainless steel, which significantly extends its service life... The main characteristics of the Neva 4511 unit according to the instructions:
- productivity is 11 l / min when the liquid is heated to 25 ° C;
- fuel consumption (liquefied and natural gas) 1.66 m 3 / h and 2.2 m 3 / h;
- open type of combustion chamber;
- rated power - 21 kW;
- electronic type of ignition;
- chimney diameter - 11–12.5 mm;
- The efficiency is 87%.
Batteries are installed in a special box at the bottom of the device. If it fails, this is not a problem as it is easy to replace it yourself.
Advantages and disadvantages
The domestic model Neva 4511 can please potential buyers of gas water heaters with several advantages:
- compact size and ergonomic design;
- high performance;
- ease of use;
- availability of service and repair;
- low cost;
- safety and reliability,
Any technique has a number of advantages, but also disadvantages. The Neva unit has several disadvantages:
- in comparison with foreign-made products, its efficiency is much lower;
- does not show the water temperature at the outlet;
- low bandwidth;
- the heat exchanger quickly clogs;
- the column should be installed only on a dry wall with high-quality thermal insulation;
- the need to periodically change the batteries.
According to experts, the operating time of the device is always influenced by the rules of its operation, as well as the quality of assembly in production. They it is also not advised to take on DIY repair , and to attract only specialists for this.
Gas water heater Neva 4511: reviews
For some users, such a technique can last a long time and not break down, if you follow the instructions for use. Others have it breaks down faster... Many of the buyers leave their feedback after purchasing and installing this unit.
Into your Vacation home purchased such a column. It runs on bottled gas. There were no problems with the installation. We were satisfied with the device, as it became much more comfortable. It operates quietly in automatic mode and consumes little gas. One bottle is enough for us for the summer season.
Kira, Voronezh
We moved to an old-style apartment and there hot water only from the gas water heater. We removed the old one, replacing it with the Neva 4511. It became a real salvation for us after the old, noisy and cumbersome one. The new one works in automatic mode, it is very quiet and no matches are needed for ignition.
Asya, Rostov-on-Don
We were advised to purchase a Neva water heater by a gas technician repairman when our previous column was out of order. It is considered the most popular among buyers because it is inexpensive and reliable. Serves us for three years and so far we are happy with the purchase.
Alexander, Yaroslavl
