Among the huge variety of water heating equipment, it can be quite difficult for an ordinary consumer to choose the right model for the 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 the Neva gas water heater is, the criteria for choosing water heaters and a detailed overview of the model range.

Read in the article:

When the Neva gas column is used, its purpose

Despite the fact that many modern homes have centralized hot water supply, domestic gas water heaters have not lost their relevance. Such equipment provides comfortable living conditions for many inhabitants. Flow 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 geysers of imported and domestic production 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 have a high build quality. All models are designed taking into account the peculiarities of operation of domestic gas and water mains, which ensures uninterrupted operation of the equipment.

The general principle of operation of gas water heaters Neva and their types

Let's consider the principle of operation of the Neva household water-heating gas equipment and its varieties. The columns differ from each other in terms of the type of ignition of the incoming fuel, the design features of the chimney, power, weight and size indicators, the level of safety and the presence of additional functions.

The principle of operation of the Neva brand columns is as follows: after opening the valve, under pressure, water enters the cavity of the water-gas unit (12). It has a membrane that acts through the stem on the valve. After opening it, the gas enters the main burner (10).

Thanks to the electrode, gas is ignited using a pilot burner (3). In turn, water rushes into the heat exchanger pipeline (2), where it is heated to a certain temperature and flows to all intake points in the dwelling. The principle of the Neva gas water heaters is almost the same. All models have a long warranty period (for example, for the Neva 4511 brand, it is 12 years).

Geysers Neva: main technical characteristics

Performance

One of the main parameters of the Neva gas instantaneous 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 incoming liquid, which the unit is able to heat for a certain period of time.

Neva speakers are low-power - 17-20 kW, medium performance - 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 you have to consume hot water in large volumes, you should choose models with a capacity of 26-28 kW.

Table 1. Relationship between column power and liquid flow

Max 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 ​​\u200b\u200bare to 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 for houses of old construction, in which pipelines of highways are very worn out.

The maximum pressure value indicates the degree of load that the column can withstand. For gas water heaters, it ranges from 9.9 to 11.8 atmospheres. It is known that water hammers of a certain force are often formed in water mains, which can completely destroy the design of the heat exchanger.

Ignition type

In modern models of columns for domestic use, various types of burner ignition are used. A little earlier, only the manual type was used, in which the gas was ignited using an open flame.

Table 2. Types of ignition of domestic 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		The column has an autonomous power source (batteries) that feeds the electronic ignition unit.
microturbine		Microturbine ignition is carried out by a hydrodynamic type generator. The water flow acts as a mover, 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 Neva speaker models are equipped with is power modulation. Thanks to a special device, users can adjust the flame. The degree of heating of the heat exchanger depends on its intensity. Adjustment is carried out by reducing 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 house's carrier line. As practice shows, this function contributes to economical gas consumption. It also ensures the safety of users by protecting them from thermal burns.

Type of heat exchangers

Before you buy a Neva gas water heater, you should find out which heat exchanger is installed on it. This structural element is made of steel, as well as copper of simple and high purity. In the first case, the equipment is inexpensive, has a large weight, and is characterized by high reliability in operation.

Heat exchangers made of simple 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 highly purified 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 more than analogues, however, they last much longer without the need for repair work.

Type of removal of combustion products

To date, the most widely used columns with an atmospheric type of output of combustion products - through the chimney channels. After installing the water heater, an air duct is connected to its outlet socket, 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 bring the exhaust gases out. 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 columns with sensors. They form a safety system of units that prevent the occurrence of emergencies.

Table 3. Sensors for gas water heaters

Device	Purpose
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 there is an increase in pressure 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 water temperature.
Additional temperature 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	It is used to control the operating temperature of 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 enter the system.
Traction control sensor	If the traction is insufficient, the device will not allow the column to turn on.

Model range of geysers Neva

Gas column Neva 4510

One of the popular models is the Neva 4510 geyser. The unit is equipped with an electronic automatic ignition system. The capacity 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. So, Neva 4510 consumes 0.77 m³ / h of liquefied gas, and natural - 1.95 m³ / h. Device dimensions − 648×356×218 mm.

Gas column Neva Lux 5514

Neva Lux 5514 is one of the best models of household gas water heaters, which is not inferior to well-known brands in terms of main technical indicators. The design features of the unit include:

• the presence of a thrust sensor;
• reliable combustion chamber equipped with a water cooling system;
• automatic maintenance of the set water temperature;
• integrated piezo ignition;
• hydraulic flame intensity modulation control system;
• automatic gas pressure level limiter.

The power of the water heater is 28 kW, the productivity 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 at the same time to two intake points. The column turns on automatically at the moment 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 unit there is a rotary control, 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 utility bills are paid at a fairly low price. The Neva Lux 5514 geyser is characterized by stable silent operation, moreover, the occurrence of unit malfunctions is quite rare.

Gas column 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.

How to properly connect the device to the water supply system, gas line or liquefied gas cylinder can be found in the operating instructions. According to user reviews, the Neva 4511 gas water heater copes well 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 - a way to troubleshoot"

Gas column Neva 4513

The Neva 4513 household gas water heater is equipped with an automatic electric ignition system. The rated power of the model is 25 kW, the performance of the unit is 13 l / min. With a weight of 15.8 kg, the dimensions of the product are 665 × 390 × 237 mm. A water-cooled combustion chamber is installed in the column.

Neva 4513 is easy to operate, has a long service life and a high degree of safety. The power of the unit is quite enough for hot water supply to several consumers at the same time.

Technical characteristics of the geyser Neva 3208

The Neva 3208 instantaneous gas water heater model can operate at a minimum pressure of 0.15 atmospheres. With a rated power of the equipment of 23.2 kW, its performance is 6.5 l / min. The column is mounted in a vertical position, the supply of lines is at 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.

Gas column Neva Transit

We will consider the operation features of the 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, a capacity of 6–12 l / min). Flow-through units maintain the set liquid heating temperature 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 pipeline is reduced, due to which the operating life of the unit is significantly increased.

How to choose a geyser Neva

We have already considered the main parameters that should be considered when choosing a gas column model. It also depends on how many sampling points the column should provide. So, for a small apartment, an excellent option would be to purchase the Neva 4510 model. A power of 17 kW is enough to provide hot water.

If a more powerful unit, the choice is obvious - the gas water heater Neva Lux 5514. According to many users, the price of the model is fully justified. In addition, it should be borne in mind that for many years you will not have to spend money from the family budget on the repair and maintenance of the unit.

The main problems and repair of the gas column Neva

Neva column does not light up

If the Neva gas column does not ignite, the first thing to check is the electronic unit that generates the formation of 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 mounting bolts are unscrewed and the supply wires are removed (the new unit is installed in the reverse order).

Why the Neva gas column does not turn on

Let's 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 draft in the ventilation ducts. The problem is solved by cleaning the chimney shaft, for which you should use a ruff with steel fibers.

If the column has an automatic ignition system, you should check the operation of the generator, batteries (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 the contacts.

A weak pressure of 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 gas column Neva

Spare parts can be easily bought 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 (require quality certificates for the offered spare parts).

Flowing gas heaters - become "lifesaver" for providing a family with hot water in a private house or when the central hot water system in a high-rise building is not provided or is not stable. Once "ruling" in the buildings of the old building, the speakers for a while undeservedly "gone into the shadows", but now, apparently, they are experiencing a "rebirth", as an increasing number of homeowners are striving for complete autonomization, independence from "whims" public utilities.

To meet the needs of consumers, new ones have been developed and are constantly appearing, which already very vaguely resemble their bulky predecessors. They are equipped with modern automation and multi-stage protection systems, which ensures increased safety of operation of devices. One of the most successful models of domestic development is the Neva 4511. This column is characterized by small dimensions, sufficient performance for household needs and, ease of use, good reliability. However, any technique from time to time can present an unpleasant “surprise”, refusing to turn on or working with certain violations. The water heater in question is no exception. And since it is one of the most massive, then search queries - gas water heater Neva 4511 do-it-yourself repair - are also quite common.

The device of the gas instantaneous water heater "Neva 4511"

First of all, it should be noted right away that it is not particularly recommended to undertake an independent repair of a gas column, at least for those owners who generally have little understanding of such devices. Moreover, you should not do this during the period of the still unexpired warranty period - self-repair will terminate the manufacturer's obligations.

However, the mentality of most of our men is such that they need to be able to do everything with their own hands. This is sometimes facilitated by the sluggishness of the service departments, excessively inflated prices for calling a specialist and other similar reasons. But if there is a desire to carry out repairs well, then it would be unreasonable to start it without understanding the column device.

Information about the device and characteristics of the column "Neva 4511", of course, is contained in its technical description. However, it still makes sense to provide information - at least for those who for some reason have lost the product passport.

To begin with, the main characteristics of the water heater:

Name of parameters	Parameter values
Rated thermal power of the column	21 kW
Rated heating capacity	18 kW
Efficiency factor (COP), not less than	0.87
Used types of energy carrier:	natural gas network G20
	liquefied gas in cylinders G30
Required nominal gas pressure, kPa:
- natural G20	1,3 (2,0)
- liquefied G30	2.9
Average gas consumption during continuous operation:
- natural G20	2.22 m³/h
- liquefied G30	1.66 kg/hour
Diameter of replaceable burner nozzles:
- for network natural gas G20 with a pressure of 1.3 kPa	1.28 mm
- for network natural gas G20 with a pressure of 12.0 kPa	1.14 mm
- for liquefied gas G30	0.79 mm
The minimum allowable water flow for the correct operation of the column	2.5 l/min
Operating pressure range in the cold water supply line	15 ÷ 1000 kPa
Average water consumption for a temperature rise of 30° (Δt = 30°)	9.2 l/min
Water consumption during heating Δt = 40°	7 l/min
Water consumption during heating Δt = 25°	11 l/min
Range of required vacuum in the chimney	2.0 ÷ 30 Pa
Normal temperature of combustion products	not higher than 150 °С
Column ignition type	Electronic, automatic when water is supplied
Power supply	Two 1.5 V batteries, type B LR20
The average total duration of the device operation on one set of batteries	250 hours
Water heater dimensions (height × width × depth)	565×290×221
Water heater weight (gross / net), maximum	11.0 / 10.0 kg

Now let's look at it from the outside:

From the front and sides, the column is covered with a metal casing covered with enamel - lining (pos. 1). Approximately in the center of the "facade" there is a viewing window (pos. 2), which allows you to visually control the operation of the device.

Below are the controls. This is the handle of the gas flow control valve (pos. 3) and the handle of the water flow valve symmetrical to it (pos. 4). Between them is a two-digit digital indicator (pos. 5), showing the current temperature of the water at the outlet of the column.

Below are three branch pipes, each of them with an external threaded section G ½. On the right (the branch pipe (pos. 6) is intended for connection to the plumbing system - for supplying cold water. The far left branch pipe (pos. 7) is the outlet of heated water, it is connected to the domestic hot water distribution. Closer to the center and moved somewhat forward (pos. 8 ) - a branch pipe for connecting to a gas main or to a cylinder with liquefied gas.

From above there is a branch pipe of the gas exhaust device (pos. 9) for connection with the chimney system.

The entire structure of the column is assembled on a metal console (pos. 10), which simultaneously plays the role of the rear wall of the device. There are two "windows" (pos. 11) for hanging the water heater on the wall on hooks-brackets.

Now consider the column with the lining removed:

On the diagrams - "through" numbering, therefore positions 6, 7 and 8 - respectively, branch pipes for connecting to the water supply, to the DHW distribution and to the gas source.

The branch pipe (pos. 6) is connected to the water block (pos. 12), from which the stem of the water flow control valve (pos. 13) enters. Below you can see a cylindrical part with a notch on the walls (pos. 14) - this is a plug for draining water from the column during repair and maintenance work. It also provides an emergency valve that operates when the pressure in the water supply network is exceeded.

In the center there is an electronic control unit (pos. 16), from which wires go to the sensors and functional elements of the device.

The gas block is located symmetrically to the water block (pos. 17). They are assembled into a single structure - a water-gas unit. The stem of the gas flow control valve (pos. 18) comes out of the gas block. An electromagnetic gas valve (pos. 19) is installed between the inlet pipe and the cock.

In addition, a microswitch (pos. 15) is fixed on the gas block, which is pressed by a special pusher in the off position.

Above the water-gas unit, a gas manifold (pos. 20) is mounted, connected to it by a bent branch pipe on a flange connection. The collector itself is fixed on the column body with two screws (pos. 21).

Nozzles with the required hole diameter are installed in the manifold on the back side, for gas outlet to a ten-row burner (pos. 22). Two elements are fixed on the front side of the collector, which are outwardly similar to each other, but perform completely different functions. On the right - a candle - a spark generator, for igniting the column at start-up (pos. 23). On the left (pos. 24) is a flame sensor (often called an ionization sensor).

Above is a copper heat exchanger (pos. 25), where, in fact, the water is heated from the burner flame. The heat exchanger has detachable connections: on the right (pos. 26) - with the water unit of the device, and on the left (pos. 27) - with the hot water outlet. Additionally, the heat exchanger is fixed to the body with a pair of screws (pos. 28)

There are two sensors on the outlet pipe itself. The upper one (pos. 29) is a sensor for protecting the column from overheating (essentially a thermal relay), and the lower one (pos. 30) acts as a thermometer and is connected by a pair of wires to the display panel on the device casing.

In the upper part of the column there is a gas outlet device (pos. 31), which has its own system of straight and curly jumpers that direct the flow of hot combustion products in the right direction towards the chimney channel. On the left side (pos. 32) there is a draft sensor, which is also a thermal relay, and connected by one electrical circuit in series with the overheating sensor (pos. 29).

Below is a plastic battery compartment (pos. 34) for two batteries.

And, finally, from the bottom left and right, at the extreme points of the body-console, there are two brackets with lugs (pos. 33), into which screws are screwed when installing the casing-cladding.

Many of the details and assemblies will be discussed in more detail in the course of publication with images attached. In this case, all numbering on diagrams or photographs will be saved.

Video: basic information on the installation of the gas column "Neva 4511"

The principle of operation of the gas column "Neva 4511"

To understand on what principle the water heater works and what protection systems it is equipped with, let's turn to another diagram:

Schematic diagram of the operation of the column "Neva 4511"

In the off position of the device, power is not supplied to the electronic circuits of the control unit (pos. 16) - it is open in the microswitch (pos. 15) located on the gas block. The pusher presses the microswitch plate, holding it in the "off" position.

In the absence of power, the solenoid gas valve (pos. 19) is also in the closed position, blocking the path of gas flow from the inlet pipe to the gas unit. In addition, the gas supply is blocked at another line. This is a mechanical poppet valve located in the gas block (pos. 35 in the diagram). In the non-working position, the gasket of its plate is tightly pressed against the corresponding seat, completely closing the channel for the passage of gas towards the manifold.

The main part of the water block (if you do not consider the control valve) is the so-called "frog" (pos. 36) - a two-chamber device separated by an elastic rubber membrane. The frog cameras communicate - a special channel is provided for this. When the water supply is turned off, the pressure in the chambers is released, and the membrane occupies a free equilibrium position.

The passage of water from the main to the heat exchanger is carried out through the lower chamber, and in the upper chamber there is a movable rod with a plastic plate adjacent to the membrane. The rod through a special hole in the center goes out towards the gas block.

Accordingly, in the body of the gas block, a response rod is exactly coaxially located, which is connected to a mechanical poppet valve, and the pusher of the microswitch is also attached to it.

What's happening at start cold water with the required flow rate (at least 2.5 l / min), that is, when opening a “hot” tap at the tap?

A stream of cold water passes through the "frog". The configuration of its internal channels is such that a vacuum is created in the upper chamber. The membrane under the pressure of the flow bends and pushes the plate, which imparts translational motion to the stem. This water assembly rod, in turn, presses on the coaxial rod of the gas block, moving it (pos. 37). In this case, two operations are performed simultaneously:

• The pusher connected to the rod releases the microswitch plate, and it goes into the “closed” position. The control box electronics are powered from the battery compartment (pos. 34).
• The movement of the stem provides overcoming the force of the clamping spring in the mechanical gas valve. Its plate moves away from the seat, opening a channel for the passage of gas to the manifold.

With the power supply, the electronic control unit starts to work:

• Voltage is applied to the solenoid valve, which opens the way for gas from the inlet pipe to the tap and further, through the mechanical valve - to the manifold and burners.
• The control unit generates and transmits to the glow plug (pos. 23) the impulses necessary to create sparks that cause the flame to ignite. If everything worked properly, then the burner should light up.
• The ignition process is “observed” by the flame (ionization) sensor (pos. 24). If for some reason in the first 6 ÷ 7 seconds the burner did not work, then, in order to avoid the free exit of gas and the accumulation of its explosive concentration, the control unit will shut off the solenoid valve and stop supplying impulses to the candle. If the ignition is successful, then the signal from the flame sensor will be converted into a command to stop sparking on the candle. During the operation of the water heater, if the flame suddenly goes out, the absence of a signal from the ionization sensor will lead to the closing of the solenoid valve.

All these functions will be performed under one more condition - if the circuit is not broken, which includes two temperature sensors - thrust (pos. 32) and outlet water temperature (pos. 29). The normal position of these relays is closed, they are located in series, which means that the control unit will receive power only if both sensors are in normal mode.

• If the draft in the chimney is insufficient, then the exhaust gases do not immediately pass into the central channel, but, due to the special configuration of the device, enter the side cavities. On the left is a sensor that will immediately respond to an abnormal increase in temperature and open the power supply circuit of the control unit with all the ensuing consequences.
• The relay located on the outlet pipe from the heat exchanger will do the same. If the temperature reaches a critical ceiling (about 90 ° C), then the power supply circuit of the control unit is opened.

At turning off the water the following happens:

• The lack of water pressure leads to a rapid equalization of the pressure level in both chambers of the "frog". The membrane returns to its original position, ceasing to transfer the impact to the plate with the rod. Accordingly, the rod of the gas block under the action of the springs also returns to its place.
• The return of the stem releases the poppet valve, which tightly closes the gas passage.
• The pusher presses the microswitch plate, and the electrical power supply circuit of the control unit is broken.
• No voltage is transmitted from the power supply to the solenoid valve, and it goes into the "closed" position.

That's it, by closing the cold water supply, the column automatically turns off completely.

For clarity of the picture, you can give a bottom view of the column - the photo clearly shows the main details and nodes that directly affect the operation of the column (the numbering is saved). Added position 40 - microswitch pusher.

Location of column nodes - bottom view

In addition, the indicator display (pos. 38) is included in the electronic circuit of the dispenser. It is connected by a pair of wires to the control unit - to obtain the necessary power, and to the outlet temperature sensor (pos. 39). However, this device plays an exclusively informational role, without taking any part in the regulation and without performing any safety functions. The column remains operational even when the display circuit is completely turned off, for example, when removing the top cladding.

Such a detailed story about the device and the principles of operation of all nodes and mechanisms of the column is necessary. If the owner of the device is well versed in these issues, then, most likely, it will even intuitively be easier for him to understand the possible cause of the malfunction and ways to eliminate it.

Well, now you can go right to the most common problems and evaluate whether they can be fixed on your own.

How to troubleshoot the Neva 4511 column

Power Supply Problem

As can be seen from the description of the principle of operation of the Neva 4511 column, for the normal functioning of most nodes, a stable power supply is required. (the only exception is the poppet mechanical gas valve). This means that if the water heater refuses to work normally - it does not ignite or goes out after a while, then the problem can be quite simple - it does not have enough power supplied from the batteries.

Often, inexperienced users can be misled by the fact that the digital display is on, and it would seem that there are no problems with power. However. It should also be taken into account that a rather large charge is spent on impulses transmitted to the glow plug. And besides, the control unit transmits a constant eclectic signal to the solenoid valve, keeping it open. And the total energy consumption can at the same time exceed the capabilities of dead batteries.

Read how to do it in a new article on our portal.

Prices for instantaneous water heater Neva 4511

Sometimes you can find complaints from the owners on the Internet that, they say, they checked the battery with a tester - and it shows 1.5 Volts, as expected. Or, for verification, they inserted it into a flashlight - and it burns. Both that and another - at all does not speak about full working capacity of these batteries. The voltage on the contacts may be normal, and the current under load may be insufficient. Short-term switching on of the flashlight is one thing, but a constant stable current during operation, and even simultaneously with the operation of the spark gap at the time of launch, is quite another.

In a word, if there is a problem with the column of such a plan, and no other visible reasons are found, you should still replace the batteries with guaranteed charged ones (in general, it will be useful to always have a spare set on hand).

The possible duration of continuous operation on one set of batteries indicated by the manufacturer in the technical documentation is a very approximate value, which depends both on the quality of the batteries and on the particular operating conditions of the water heater. Please note that it is recommended to use LR20 type batteries - this means that they must be alkaline (alkaline). Cheap salt (R20) a priori will not cope with a constant load and will fail extremely quickly.

Even better, of course, is to purchase lithium batteries (CR20). They are distinguished by high capacitance, stability of the generated current, duration of use, which can exceed the service life of alkaline ones by several times. The only thing that you can put them in the "minus" is a very high price, and finding them is not so easy. So from the standpoint of economy and profitability, the optimal solution is still a working set of high-quality LR20s in a water heater, and another one, new, in its original packaging, in stock.

You should never buy such batteries in "incomprehensible" outlets, in street kiosks or from market stalls, especially in the cold season. Incorrect storage conditions can easily lead to the fact that batteries with a valid, it would seem, expiration date, suddenly turn out to be unusable. It is better to give a little more, but buy really high-quality elements in a specialized store, where the sales assistant can also check the voltage and discharge current on them.

Replacing batteries is, perhaps, the only “repair and restoration operation” on the Neva 4511 dispenser, which can be carried out without removing the casing lining. Access to the battery compartment is open from the bottom - you just need to turn the locking handwheel. Be sure to control the polarity of the installation of elements.

And one more nuance. The column is still operated in conditions of high humidity, therefore it is recommended to regularly check the cleanliness of the contacts in the battery compartment - their petals may become covered with a corrosive or chemical coating, and there may not be a quality power supply even with guaranteed operability of the elements. This, by the way, judging by the statistics of calls from the owners of water heaters, is one of the fairly common causes of the so-called "breakdown" of the water heater.

All further cases of inoperability of the water heater will be considered from the standpoint that there are guaranteed no problems with the provision of power supply.

Removing the lining-casing of the column "Neva-4511"

Any work other than replacing the batteries will require removal of the speaker lining. This is easy to do, as is putting the cover back in place.

When starting to dismantle the casing, and for any other repair work, the taps on the water supply and outlet pipes and on the gas pipe must be closed. Next, the following actions are performed:

Illustration
	The entire sequence of work will be shown on a column lying on the table (just as an example). This does not change the order of the operations in any way. The figures show the Neva-5611 water heater, but its lining and almost the entire internal structure exactly matches the 4511 device. There is a small nuance in the fastening of the casing, which will be mentioned. First of all, the handles of the cranes are removed - they are simply gently pulled towards themselves. There are no locking fasteners on them. You don't need to rotate them either. The handle is removed first from one tap, ...
	... and then from the second. If the handle "resists", does not want to leave the stem, you can slightly push it from below by sticking your hand under the lining.
	Here it is - the only difference in fastening the lining on the Neva 5611 column: under the handle of the gas supply adjustment valve, a fixing screw is found that must be unscrewed with a screwdriver. Models 4511 do not have this part, and this step is simply skipped.
	There is a temperature indicator on the cladding, from which two pairs of wires come out. The blue-black pair goes to the temperature sensor, the red-black pair goes to the electronic control unit.
	The wires are provided with connecting blocks, which simply need to be opened by slightly tightening the plastic retainer. First, one pair is turned off, ...
	..., then, in the same way, the second.
	As already mentioned, this indicator does not play any role other than informative, and turning it off will not affect the course of further repair and maintenance work, while the column remains fully operational.
	The fastening self-tapping screws holding the lining on the console from below are alternately unscrewed. On a hanging column, they are located at the lower extreme points of the device's contact with the wall.
	The self-tapping screws unscrewed from both sides are still removed to the side, but so as not to lose them.
	The fingers of the hands are wound under the lining from below, and for a start it is slightly fed towards itself - in this case, special centering semicircular spikes on the console frame will come out of the openings of the casing.
	Then it remains only to move the casing up - and it will come off the brackets-hooks of the console. Experienced craftsmen advise caution when performing this simple operation - often poorly processed edges of the metal sheet from which the lining is made can cut the skin of the palm or fingers to the point of blood.
	Everything, the casing is removed, and it can be put aside. The picture clearly shows the slit-like holes into which the hooks-hooks of the console enter.
	And this figure shows (with a green arrow) a centering locking hole, and a mounting platform with a hole through which a self-tapping screw is screwed (blue arrow). These elements are located in the same way on the opposite side of the cladding.
	The picture shows the electronic indicator at the back with two pairs of wires coming out of it.
	Assembly is carried out in the reverse order. First, the slot-like opening of the casing is carefully put on the hook of the console with one ...
	... and on the other side of the device.
	Then the lining is fed a little down (it itself can sink under its own weight), so that the centering protrusions get into the locking holes. This is done carefully, since the lining in the removed form is somewhat unstable, its walls are springy. As a result, the holes for screwing in the screws should be aligned in the lower part. Fasteners are screwed into place.
	The next step is to connect the contact blocks of pairs of wires from the electronic scoreboard. There is no need to be afraid of mistakes - in addition to color marking, the configuration of the pads themselves is such that it is simply impossible to confuse the contacts. And the last - handles are put on the ends of the rods of both cranes that enter over the lining, red - on the left, blue - on the right. It does not take much effort - there is a slot in the handle socket that exactly matches the “geometry” of the stem.

The process of installing the cladding was considered immediately, so that these issues would no longer be returned.

Repair work on the water unit of the Neva-4511 column

The most common malfunctions of the column during operation are associated with breakdowns or failure of parts of the water unit. When describing the principle of operation, it was already mentioned that the pressure of water, acting on the membrane and transferring force further to the gas unit, opens the mechanical gas valve and turns on the power to the entire control unit. Naturally, if this mechanism fails, the column simply will not turn on.

A water node failure can often be seen visually as well. When starting water, you need to pay attention to the pusher, which presses the microswitch plate. If it remains motionless or only slightly twitches, this is a clear sign that the membrane in the “frog” has been broken (shown in the picture below with a blue arrow). The lack of movement can also be caused by sticking of the stem. In addition, the emergency state of the water unit can be expressed in the appearance of leakage at the junction of it with the gas unit or at the water flow control valve (typical places where water appears are shown by red arrows). In any case, the assembly must be removed and disassembled for restoration.

The water unit can only be removed together with the gas unit. This is done as follows:

a - after checking that the gas supply valve on the pipe is closed, the flexible hose is twisted.

b - in a similar way, after shutting off the line, the cold water supply is removed from the pipe.

c - with a wrench, the connection of the water unit with the copper pipe leading to the column heat exchanger is unscrewed.

d - the contact block opens on the wires going from the control unit to the electromagnetic gas valve.

e - then the wires going to the microswitch are disconnected in the same way.

f - with a powerful curly screwdriver, two screws of the flange connection of the water-gas unit with a branch pipe that transfers gas to the burner manifold are unscrewed.

After that, the entire water-gas unit is easy to carefully pull out.

Illustration	Brief description of the operation to be performed
	The removed water-gas unit lies on the table. To begin with, it needs to be divided into two blocks - water and gas.
	To do this, two screws are unscrewed, shown in stacks in the photo. You can not unscrew them completely - they simply fix the cylindrical protrusion of the "frog" in the socket of the gas block with a clamp. The screws are located diametrically opposite, top and bottom. There is a nuance - they usually have slots for a curly screwdriver and a hex cap. If there is a cap, it is better to use it. Often in this place, the steel screws turn sour in the silumin case of the gas block, and it can be difficult to move them from their place. Sometimes it makes sense to pre-treat the WD-40 junction, since there are a lot of cases when the screws in this place break off due to too much applied force, effort, and the slots for the screwdriver are simply “licked”.
	The screws loosened on both sides “released” the water block.
	Here it is - separated from the gas. In these photos, everything looks beautiful, in factory lubrication, but this is far from always the case - an example will be given below.
	Further, the “frog” itself must be disassembled in order to get to the main membrane node. Remove six screws around the circumference. They can also be "sour", so we work carefully so as not to "lick" the heads.
	After removing the screws, the block will open into two parts. The rubber membrane is immediately visible. Very often, it is its rupture that leads to the complete inoperability of the entire column.
	The membrane is subjected to a thorough revision. If it is overly stretched, it has gusts or even “hints” of a violation of integrity, a new one is acquired. No amount of gluing will help.
	We remove the membrane to get to the spring-loaded plate with a rod, which transmits translational motion to the gas block. If the membrane is intact, then remove it carefully to prevent tearing in the place where it is put on the pipe connecting the upper and lower chambers of the “frog” (in the photo above it is shown by an arrow). By the way, this tiny nozzle is removable, and you need to make sure that it does not accidentally roll somewhere. Without it, the "frog" will not work correctly.
	The upper chamber of the block with a spring-loaded plate connected to the rod
	Gently pull the plate out so that the stem comes out of the guide channel.
	We take out the spring, and below we see a cork with a slot for a straight screwdriver. There is a seal that prevents the exit of water from the upper frog chamber to the gas block. It also requires periodic inspection, lubrication, tightening or replacement of the stuffing box rubber ring.
	We purchase a repair kit - a membrane and a sealing ring. They are inexpensive and usually not in short supply. Further assembly of the assembly is carried out in the reverse order. When installing the gland, it is recommended that the socket and the ring itself be generously lubricated with silicone grease. The plug is tightened with such a force that the inserted rod does not wedge, can move freely enough, with the application of moderate force, to move forward along the channel. When installing the stem, do not forget to put in place, under the plate, the spring.
	The membrane is put on with a hole on the inserted pipe and neatly fits into the body of the “frog”, so that its sides along the edges fit exactly into the recessed socket. Then we assemble both halves of the block and tighten the six screws. If there were steel ones, it is better to immediately replace them with bronze ones - they will last longer, and subsequent membrane replacements will still be easier. After that, the repair of the “frog” can be considered complete - you can connect the water and gas blocks into a single unit, install them in the column, make the necessary connections and check the performance of the water heater.
	The importance of a good stem seal can be illustrated with an example. Water flowing through the stuffing box got into the socket of the gas block, caused massive scale deposits, and disabled the microswitch. There was a partial jamming of the gas block rod. In addition, during disassembly, one soured locking screw broke and the cylinder wall of the gas block collapsed - it will have to be changed.
	Repair of the water block is also somewhat complicated. The frog lid, completely overgrown with scale, had to be soaked in a soda solution ...
	... and then thoroughly clean from plaque.
	When tightening the frog screws, it is recommended to grease them thickly with graphite or other water-resistant grease.
	All the troubles are due to the fact that the owner "started" the water heater, did not check the quality of the seals on the water block. And such a tiny detail, having worked out its resource and worn out, entailed such serious consequences. Conclusion - the slightest signs of the appearance of moisture at the junction of the gas and water blocks should be stopped immediately.
	To finish with the water block, let's look at another place of possible water leakage - from under the stem of the control valve. It happens rarely, but still. The faucet itself is fixed in the water block socket with just one screw (shown by the arrow).
	We unscrew the locking screw and pull up the valve stem. Below is a cylinder with figured holes, which regulate the intensity of the water flow. And above - there is an annular gasket (shown by an arrow). Leakage from the tap is a consequence of its wear or tear. Changing the gasket should completely solve the problem.

Prevention or repair of the gas block

Problems in the gas block happen much less often, but still they are not completely excluded. They can be manifested by the lack of gas supply to the burners, the smell of leaked gas, and in the event of a failure of the microswitch, which is also located on this unit, the complete inoperability of the entire column.

The table below will show the procedure for extracting the gas block. The steps will be accompanied by comments on which parts or mechanisms may cause abnormal operation.

Illustration	Brief description of the operation to be performed
	Before us is a gas block assembly, already separated from the water block. Before removing it from the column, if there was a smell of gas or a characteristic noise was heard, it is advisable to localize the place of the leak - grease all interfaces with thick soapy foam. The appearance of bubbles will indicate a leak.
	Sometimes column failure is caused by the failure of the solenoid valve - it simply does not pass gas further to the reducer and burners. The valve is mounted on the landing site with two screws, and has two more centering lugs, so you can not make a mistake when reinstalling. The screws are removed with a screwdriver. This screw connection, by the way, causes a lot of complaints from the masters, due to the poor quality of the fastener itself. If possible, it is better to immediately replace both screws with better ones, with powerful heads for a curly screwdriver.
	Valve removed. Pay attention to the saddle of the block in which it is installed - an annular gasket is laid there, sealing this assembly (shown by an arrow). On the most movable spring-loaded valve stem there is an elastic “plug” that buries the gas passage channel higher in the non-working position. Neither the gasket nor this "plug" should show signs of wear.
	Three wires are suitable for the valve: black, yellow and red, which are connected to the control unit through the switching block. For smooth ignition of the water heater at the time of start-up, power is transmitted via a pair of black (mass, minus) - yellow, and the valve opens a little at the same time. After ignition, power is supplied through the red wire, and the valve opens completely. It is not difficult to check the operability of the valve - this is done even when the water-gas unit is installed in the column, there is power, but when the water and gas supply lines are blocked or even already disconnected. You just need to carefully unscrew and remove the valve, leaving it connected to the control unit. Then it is necessary to "deceive" the control of the device - manually move the pusher at the microswitch. The control unit will “think” that water has been supplied and will transmit a control signal to the valve - it must retract the stem with the plug and hold it in this position until the “mikrik” is turned off (the pusher is released). At the same time, sparking should occur on the glow plug (with a characteristic sound). If the valve in such conditions does not show signs of life, then it will have to be changed to a new one - it is not difficult to purchase it.
	The gas flow adjustment valve, by complete analogy with the water one, is fixed with one screw, ...
	... and the seal is the same - an O-ring (shown by an arrow). If there is a gas leak from here, then just change this seal.
	Now we deal with the microswitch - it happens that it fails due to the ingress of leaking water into it. Checking is quite simple: you need to ring it in both positions. Without the application of any external force, the pusher presses the plate against the microswitch, the button is pressed, the circuit is open, power is not supplied to the control unit.
	If you push the stem (shown by the arrow) of the gas block from the inside (which is what the "frog" stem does when starting), the pusher releases the plate, the button rises, the electrical circuit closes.
	If the microswitch does not work, it must be replaced. It is fastened with two screws, its dismantling and installation of a new one will not be difficult. However, one remark needs to be made. The pusher is a cylindrical rod, which is fixed on the thread on the rod of the gas block. The top has a slot for a straight screwdriver. It happens that a poorly tightened or incorrectly set pusher, returning to its original position when the water is shut off, does not fully press the microswitch plate, and the button does not work to interrupt the circuit. It turns out that the control unit still "thinks" that the device is in the working position, and this, in turn, is fraught with emergency situations. When assembling the water-gas unit, this moment must be taken into account - the pusher is set to the desired position and tightly tightened with a screwdriver.
	We continue to disassemble the gas block - we unscrew the two screws holding the mechanical gas valve assembly in the assembled position.
	Carefully separate the two halves of the body so that the valve spring does not jump out to the side.
	We take out the poppet valve and a thin ring-shaped gasket. We evaluate the integrity and degree of wear of the seals and springs.
	The "plate" of the valve with its sealing belt should be tightly pressed against the seat (green arrow) and should not be dented or deformed. The red arrow shows the stem that transmits force from the water unit and thereby opens the valve.
	The free play of this rod is checked in one direction and the other. By the way, you should immediately assess whether there are signs of water ingress or gas breakthrough in the opposite direction. Here the stem also has a gland seal, which, if possible, can be changed. Sometimes it is not possible to unscrew it, and you have to change the entire assembly.
	Everything, the disassembly of the gas unit is completed. It is possible to proceed with the revision and cleaning field to the assembly, which is performed strictly in the reverse order. At the same time, worn parts are replaced as necessary. After the final assembly of the column, all connections are checked for leaks - also by soaping under gas supply conditions.

Important note! If, after turning off the water, the column continues to burn, then this is a clear jamming of the rods in the water or gas block. You should immediately turn off the gas supply, and then disassemble and repair these components.

Problems with ignition and electronics

1. One of the most common problems is that the column does not ignite after opening the hot water tap. At the same time, the pressure is normal, the water block works normally, the control unit turns on, the gas valves (both electromagnetic and mechanical) clearly open, as you can hear and smell that gas is supplied to the burner.

Most often, the problem is that the candle does not give a quality spark to the flow of the gas-air mixture. And this, in turn, can be caused by several reasons.

• Firstly, the spark may hit the wrong way or be too weak because the contact of the glow plug is not located correctly, has shifted. For normal operation, the electrode must be located 5 mm (tolerance no more than ± 0.5 mm) from the burner guide nozzle, exactly in the center of the section.

You can correct the position by slightly bending the electrode, achieving a high-quality spark. Or, by loosening the screws on the pressure plate, straighten the spark plug insulator body, and then re-tighten the fasteners.

At the same time, it is necessary to immediately clean the surface of the electrode - carbon deposits could form on it, and a high-quality discharge does not work. You can use fine-grained sandpaper, but do not clean with a sharp object.

In parallel with this operation, you can carry out similar actions with the ionization (flame) sensor. Its electrode should also be centered in the burner section so that it is in the flame when the column is operating. The electrode surface must also be kept clean and free of soot. If the sensor “does not understand” due to the unsatisfactory condition or incorrect position of the electrode that the burner is working, then after seven seconds the control unit will simply close the electromagnetic gas valve and the column will go out.

• Secondly, there may be insufficient contact between the electrode and the high voltage cable. To check, remove both cables - they simply pull down from the insulator housings. A rod will be visible there - a needle through which the contact of the electrode with the conductive core of the cable is ensured. It is necessary to check the condition of this needle - it should not have plaque that violates the reliability of the contact. After stripping, the cables are firmly inserted into place in the insulators - on the right - ignition, with red marking, on the left - from the ionization sensor, with blue marking.

If the ends of the wires are very “worn out”, then you can cut them a little, but only in such a way that the length is enough for switching, not a stretch.

• Thirdly, a discharge may occur on the column body. It is heard that there is sparking, but not a spark or a completely “sluggish” spark, or it is not visible at all. The reason may lie in a crack on the candle insulator - it must be removed, inspected, and if such a defect is detected, then the candle will have to be changed. A breakdown on the case also happens at the exit of the high-voltage cable from the control unit - this place is covered with foil, and such a breakdown is not so easy to notice.

Here you can try to additionally insulate the cable from above by using a thick heat shrink tube or even several layers of electrical tape. It is possible that the problem will disappear after that.

If such isolation does not help, and the breakdown on the case from the cable cannot be eliminated, you will have to change the control unit.

By the way, problems with a spark, when it strikes incorrectly or is too weak, provoke another “ailment” of the column - ignition occurs explosively, with a loud bang. A dangerous concentration of gas accumulates in the combustion chamber, which leads to this effect. Eliminating the shortcomings with sparking should eliminate this shortcoming as well.

2. The column may not turn on due to a malfunction of the draft and outlet water temperature sensors. It has already been said that they are in series in one circuit, and the failure of even one of them will break this circuit, respectively, thereby preventing the control unit from working.

You can check the sensors by dialing or by exclusion. When tested with an ohmmeter, the working sensor should show almost complete conductivity (resistance close to 0 ohms). To check, the spade terminals are removed from the sensors - at the same time, you can check the condition of the contacts, since it is possible that they simply “sour” and require cleaning.

If there is no multimeter, then you can do otherwise. Temporary jumpers are alternately placed on the sensors, closing them directly. For example, they bridge the draft sensor and try to start the column. If it ignites freely after that, the cause is found, the sensor needs to be replaced.

To check, you can temporarily put jumpers - first on the draft sensor, ...

If the jumper on the sensor did not give anything, it is removed and put on the second - temperature. The check is carried out in the same way.

... and then to the overheat protection sensor

IMPORTANT: if the column works with jumpers, this does not mean at all that you can leave it that way. Such testing is carried out solely to identify a malfunction and only for a short start of the water heater. It is strictly forbidden to operate a dispenser with a shorted safety circuit!

A few more words about this safety chain.

The reason for the rapid shutdown of the column after a normal start may be insufficient traction - the upper sensor in this circuit opens at a temperature of about 75 - 80 degrees. Sometimes this phenomenon is caused by improper installation of the flue gas outlet pipe. The table below shows common cases where an incorrect installation prevents the column from working normally.

Illustration	Short description
Correct installation
	The diagram shows the parameters for the correct installation of the combustion products removal system.
Wrong installation
	A common mistake is to wall the pipe in such a way that it either almost touches the back wall of the chimney channel, or overlaps it over a significant cross-sectional area. The required traction will not be.
	At the same level with the installed pipe from the column, there is a ventilation window or the connection of another device.
	The laid pipe is shared to connect another device, including a kitchen hood. The required vacuum in the flue duct of the column will not be.

Elimination of errors in the installation of the chimney should normalize the draft, and malfunctions in the operation of the water heater will stop.

The lower temperature sensor may be triggered if the balance of water and gas flow is incorrect. You can eliminate it by appropriately adjusting the taps - reducing the gas supply and increasing the water pressure.

Well, if with proven, guaranteed working batteries, a microswitch that is clearly triggered when water is started, a tested, default closed safety circuit, but the column still does not turn on, most likely, it will need to replace its “brains” - the control unit.

To finish the topic of electronics - another possible problem that does not directly affect the performance of the column, but introduces certain discomfort during its operation.

We are talking about malfunctions in the operation of the digital display on the front panel, despite the fact that the column itself is working properly.

• So, the dial may not burn at all - which means that it is necessary to check the reliability of its contact connection with the temperature sensor and with the control unit. If these measures do not change anything, then there is a failure of the display itself - it will have to be changed.
• If, after starting, the numbers on the display are replaced by the error symbols “EE”, then the problem should be sought in the temperature sensor. Here, either souring of the contacts, or a complete failure of the sensor, is also possible.

Burner problems

The column can turn on and work normally, but the required heating level cannot be reached. It happens that the apparatus begins to “smoke”, and the flames on the burners are of an uncharacteristic blue color, and with obvious yellowness, unstable. It also happens that one of the rows-sections does not burn at all. All this is a consequence of the clogging of the burner with dust, the overgrowth of the jet nozzles on the manifold.

To clean the burner, it must be removed. This does not require the dismantling of the water-gas unit at all - it is enough to disconnect the wires from the candle insulators and the flame sensor, and then unscrew the union nut on the L-shaped pipe going from the manifold to the gas block (shown in the photo with a red arrow).

First, dust is brushed off from all parts with a brush. Every internal channel of the burner also needs to be cleaned of dust - for this, a plastic ruff of the desired diameter is used. Then a soap solution is diluted (it is possible - a kitchen detergent) and the burner is washed with it both from the outside and from the inside, using a brush and a ruff. After that, it is thoroughly washed with clean water and left to dry completely.

The collector is also first cleaned from above from dust and plaque with a damp cloth. Assess the condition of the jet nozzles. It is impossible to clean them with hard objects (wire, knitting needle, awl, etc.). It is better to unscrew them (head by 8), and blow with a jet of air, for example, with a car pump. If the owner is a motorist, then he may have an aerosol in the garage for washing the carburetor channels: in this case, such a solution can be very useful.

After cleaning, the collector is dried, collected, and then, together with the burner, is installed back into the column. When installing, be sure to check the condition of the sealing gasket in the union nut.

Preventive work with the heat exchanger

Problems with the heat exchanger are usually expressed in insufficient pressure at the outlet of the column, weak heating of the water, and suspicious noises during the operation of the column. The copper tubes of the heat exchanger can build up scale over time, especially if the water supply is hard, and this affects both the efficiency of heat transfer and throughput. It happens that a heavily clogged heat exchanger does not allow the water unit to work properly - there is not enough pressure for it, and the entire column becomes inoperative.

In addition, dust mixed with soot, which clogs the space between the heat exchange plates, can interfere with the normal heating of water.

Removing the heat exchanger is easy. The column must be disconnected from the water supply, the remaining water is drained from it - the plug under the water block is unscrewed. Then the nuts of the heat exchanger connections with the tubes going from the water block and to the hot water outlet are unscrewed - on the left and right (shown in the figure with green arrows). There are gaskets that will most likely need to be replaced.

The heat exchanger can be completely released after unscrewing the two screws (blue arrows) and removing the metal plate fixing it (yellow arrow).

• To clean the heat exchanger from the outside, it is first washed with a strong stream of water, and then immersed in a solution of a detergent composition with degreasing properties (a kitchen dishwashing detergent is suitable). This soaking lasts 15 ÷ 20 minutes at room temperature. Further, you can clean all surfaces using a soft brush. After cleaning, the heat exchanger is rinsed abundantly with cold water. If necessary, the external cleaning procedure can be repeated.

• The internal channels of the heat exchanger are cleaned by backwashing with water under high pressure. But if the build-up of scale is large, then a more complex procedure will be required, using an acid solution.

For these purposes, you do not need to look for any technical acid - usually citric acid is enough. A solution is prepared from a ratio of 100 g of crystalline acid per liter of water at a temperature of about 35 - 40 ° C.

This solution fills the entire cavity of the heat exchanger pipes through one of the nozzles. Usually, already during filling, literally after a few seconds, the onset of a violent reaction is noticeable with the release of gas bubbles and cloudy liquid. The pipes are filled "to the eyeballs" and left for about a quarter of an hour. After that, the remaining solution is drained, and the heat exchanger is subjected to thorough washing.

Sometimes, to achieve the optimal result, it is necessary to repeat this operation.

After flushing the heat exchanger, it is installed in place. When connecting its nozzles with copper pipes, new ½ inch rubber gaskets are laid. It is not worth overtightening these connections - the gasket can be squeezed, act as a "skirt" inside the channel, and this causes unpleasant noise and even a place of possible clogging.

Prices for popular instantaneous water heaters

So, the device of the Neva-4511 column and the most characteristic failures or breakdowns for it were considered. Having understood the principle of operation of the water heater and the interconnection of all nodes, knowing the methodology for eliminating the main defects, the owner will be able to understand the probable cause of the malfunction and determine the amount of repair work. However, if there is no confidence in your own capabilities, it is still better to invite a specialist, since gas equipment does not tolerate an amateurish approach.

NEVA gas water heaters are produced by the Gazapparat company, which has its own production facilities. All released equipment must undergo performance, tightness, electrical safety tests using automated installations.

Buyers say:

Geyser Neva 4511 gets good reviews: Most buyers focus on the affordable price and fairly good quality of the product.

“The parents, having decided to change the column at home, consulted the seller and purchased the domestic Neva 4511. Since they are pensioners, the low cost of the water heater suited them perfectly. Using, they are very happy, the device works without problems, it does not take up much space, decent power. Recommend to all my family and friends."

Sveta Seliverstova, Moscow.

“Having tested this unit, I can highlight the advantages: automation, a copper radiator. The disadvantages include: often you need to change the batteries, every 2 - 3 months, it is better to put alkaline ones (they are more expensive, but they will last longer); wires stick out from under the bottom; components made in China. If it turns off after heating, then it is necessary to replace the draft sensor. I turned it 180 0 and set it up. After that, the warm air from the burner does not get on it, everything is fine.

Igor, Voronezh.

“I like the model 4511 that it has a temperature indicator, temperature and pressure adjustments, compact dimensions, and a low price. I didn’t like the work, which sometimes makes noise, the throughput is low, the water temperature depends on the pressure. ”

Mikhail Granyuk, Korolev.

“The sizes are small, it works quietly, there is no wick. Made in Russia, and the parts are most likely Chinese. Sometimes there are pops when turned on, for 5 months of use it has become a little louder to work. But when compared with what was before, it works almost silently. When the second tap is opened, the pressure drops very much.

Marina Azhar, Rostov-on-Don.

“I installed it myself for a shower in the country. Be sure to check all details before installation. Most nuts are simply slid onto connectors. We've been using it for over a year. At first it worked well, though there was uneven heating. With a weak gas flow, it warms up for a long time. If the gas is turned on strongly, it quickly heats up and turns off due to overheating. Moreover, a strong flow of water is needed, with a weak one it does not turn on. After a month and a half of work, the solenoid valve broke. Changed. After wintering in a dry room, in the new season it began to work normally. After a couple of weeks, pops began to be heard. Changed the batteries. And again, after a couple of weeks, the solenoid valve broke down.

Andrey Shishparenok, Moscow.

“I chose a column for a long time, I stopped at Neva 4511. I have been using it for more than two years. There are no complaints. The batteries are still the same. Some begin to complain about cotton. I don't care, I can't hear it at all in the bathroom. Disadvantage: the water pressure affects, the less, the hotter. I guess it's normal."

Valery, St. Petersburg.

Instantaneous water heaters Neva are divided into classes:

• Economy
• Comfort.
• Premium.

Neva 4511 belongs to the economy class. The main parts are a copper heat exchanger, a burner, an enamelled body.

Characteristics of Neva 4511

• For heating water up to 40 0 ​​C, the heating rate is 8 l/min, for 25 0 C - 11 l/min.
• Electronic ignition, batteries not included.
• Dimensions: 565mm x 290mm x 221mm
• Power - 21 kW.
• Gas consumption - 2.2 m 3 / h.
• Reduced gas consumption - 0.8 m 3 / h.
• Water pressure to turn on the water heater - from 3 atm.
• Weight 11 kg.

Peculiarities:

• Management - full automatic.
• Two knobs: regulation of the water flow through the column, control of the burner flame.
• The temperature sensor, when the water overheats over 90 0 C, turns off the water heater.
• The solenoid valve that controls the gas supply to the burner turns off the column in the event of a leak or pressure change.
• A mesh filter is installed on the gas supply.
• If the solenoid valve fails, the safety valve is activated.
• The heat exchanger is made of electrolytic copper, shielded.

The price of the NEVA 4511 geyser depends mostly on the location of the store. The price may include shipping costs.

Due to frequent shutdowns of hot water, many apartment residents began to install geysers and water heaters. In their own homes, the owners deal with hot water supply and other household issues in private. Most owners of cottages and houses install geysers. Neva 4511 is considered the most popular model of gas water heaters. What are its characteristics and reviews after operation?

Description

The old and uncomfortable speakers have been replaced by new compact and modern units. Such products satisfy the needs of many consumers. The devices are equipped with modern automation, have a multi-stage protection system. This is a very important feature, as it provides increased safety during operation.

Among the popular models includes the gas column Neva 4511, which is produced by the Baltic Gas Company. The company has been operating since 1995 and is the country's leader in the production of domestic 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 1,500 settlements selling gas equipment and spare parts. The company's products combine advanced European technologies and the experience of Russian engineers.

Model Neva 4511 is designed for very fast heating of water in a private house or apartment. The geyser 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 operation - 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 the column starts after opening the tap with hot water. At this point, the electronic automatic ignition system is activated. It fires sparks and is battery operated.

It is worth mentioning separately the safety of the device. According to the operating instructions, the unit will automatically turn off when:

• there is no water or the ignition burner is attenuated;
• heating the liquid over 80 ° C;
• in case of violation of draft in the chimney.

Manufacturers give a guarantee for the product for a period of 2 years. The operating period of the geyser according to the Neva 4511 instructions is up to 12 years.

Specifications

Geyser Neva 4511 has a rectangular shape, ergonomic classic design. It is lined with a panel in white or silver. Facing affects the price of the product. Silver finish 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 heat exchanger of the two-tier type column is made of copper and does not contain impurities of lead and tin. The increased diameter of the pipe protects against the accumulation of scale. A unique burner is made of stainless steel, which significantly prolongs its service life. The main characteristics of the Neva 4511 unit according to the instructions:

• productivity 11 l / min when heating the liquid 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;
• Efficiency - 87%.

Batteries are installed in a special box at the bottom of the device. If it fails, this is not a problem, since it is easy to replace it yourself.

Advantages and disadvantages

Potential buyers of gas water heaters can be pleased with the domestic model Neva 4511 with several advantages:

• compact size and ergonomic design;
• high performance;
• ease of use;
• availability of maintenance and repair;
• low cost;
• safety and reliability,

Any technique has a number of advantages, but also disadvantages. The Neva unit has several disadvantages:

• compared to foreign-made products, its efficiency is much lower;
• does not show the outlet water temperature;
• low throughput;
• the heat exchanger clogs up quickly;
• the column should be installed only on a dry wall with high-quality thermal insulation;
• need to change batteries periodically.

According to experts, the terms of operation of the device are always affected by the rules of its operation, as well as the quality of assembly in production. They are also do not advise to undertake self-repair, and to attract only specialists for this.

Geyser Neva 4511: reviews

For some users, such equipment can last a long time and not break if you follow the instructions for use. For others it breaks down faster. Many of the buyers leave their feedback after purchasing and installing this unit.

Bought this speaker for my country house. It runs on bottled gas. There were no problems with installation. They were satisfied with the device, because it became much more comfortable. It works 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 type apartment and there is hot water only from the gas column. We removed the old one, replacing it with the Neva 4511 model. It became a real salvation for us after the old, noisy and bulky 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 appliance repairman when our previous column failed. It is considered the most popular among buyers, because it is inexpensive and reliable. It has served us for three years and so far we are satisfied with the purchase.

Alexander, Yaroslavl

Able to provide comfort during water procedures for a long time. When choosing a device, it is important to pay attention to the reputation of the manufacturer. In the domestic market, the leading positions in the field of designing flowing gas water heaters belong to the BaltGaz Group concern. One of the models produced by the company is the Neva-4511 geyser, the technical characteristics, reviews, advantages and disadvantages of which will be discussed in the article.

Baltic Gas Company (BaltGaz Group) has been operating since 1995. Today the concern is the leader of the Russian market in the segment of development, production and sale of gas water heaters and boilers.

The group includes two large plants: St. Petersburg Gazapparat and Armavir Gas Plant. equipment". The sale of finished equipment and spare parts is carried out by the concern wholesale and retail to household and industrial consumers. Points of sale are open in more than 1500 settlements of the Russian Federation and neighboring countries. The number of authorized service centers is more than 400.

BaltGaz Group products combine Russian engineering experience and advanced European technologies. Geysers are produced under the brands Neva and Neva Lux (NEVA and NEVA LUX). The quality of their performance and the level of environmental safety comply with international standards, and the price is lower than that of foreign analogues.

Speaker specifications

The flow gas heater Neva-4511 has been produced at the Armavir Plant since 2007. The project of the device was developed by the engineers of the Gazapparat plant. Main characteristics:

• productivity (when heating water at 25 ° C) - 11 l / minute;
• fuel consumption - 2.2 m3/h and 1.66 m3/h for natural and liquefied gas, respectively;
• camera type - open;
• rated power - 21 kW;
• type of ignition - electronic;
• chimney diameter - 11-12.5 cm
• Efficiency - 87%.

Gas water heater Neva 4511 is designed for instant heating of water in apartments and private houses. It is mounted vertically and connected to a natural draft chimney to remove combustion products. The device is designed for 1-2 points of water intake. Natural or liquefied gas can be used as fuel.

The Neva 4511 water heater is rectangular in shape, has an ergonomic classic design (lined with a white or silver panel) and compact dimensions: height - 56.5, depth - 22.1, width - 29 cm, weight - 10 kg. In front of the shoe there are knobs for regulating the flow of water and gas, as well as a digital display showing the temperature of the liquid at the outlet.

The two-tier heat exchanger of the Neva 4511 column is made of copper without impurities of tin and lead. The diameter of its pipes is increased, which protects against the accumulation of scale. The unique burner is made of stainless steel, which has a positive effect on its service life.

The operation of the column is started by opening a tap with hot water. At the same time, the automatic electronic ignition system is activated, emitting spark discharges and powered by batteries.

The safety system of the water heater deserves special attention. The device turns off in the absence of gas, water supply, attenuation of the pilot burner, heating of the liquid above 90 ° and violation of draft in the chimney. There is no doubt about the availability of such a device as the Neva-4511 gas water heater, the price varies from 8400 to 12000 rubles. in different stores.

Note: The Neva 4511 water heater can operate even with reduced water pressure in the system (from 0.15 atm). Manufacturer's warranty - 2 years. The approximate service life of the column is 12 years.

Advantages and disadvantages of the column

Let's find out what advantages the Neva-4511 gas water heater has based on technical specifications and reviews. Main advantages:

• compact dimensions;
• classic column design;
• low price;
• ease of use;
• minimum noise level;
• convenient system for turning on / off the column;
• presence of the indicator of inclusion and temperature;
• security system that meets world requirements;
• the ability to adjust the water flow and temperature level;
• availability of repair and maintenance of the column - a large number of service centers, inexpensive spare parts.

When considering such a heater model as the Neva-4511 geyser, the reviews show that the device has certain disadvantages, including:

• The efficiency is lower than that of imported analogues, that is, the device consumes more fuel to heat the same amount of water;
• lack of control of the outlet water temperature - it is only possible to regulate the difference in temperatures by which the water is heated, if the degree of water at the inlet suddenly increases, then too hot liquid will flow from the tap;
• the low bandwidth of the column, in fact, it is enough for one point - for example, if one of the family members takes a shower, then you cannot open the faucet in the kitchen, otherwise it will burn;
• the heat exchanger quickly “clogs” if tap water is of poor quality;
• the device can only be installed on a dry wall with good thermal insulation;
• Batteries need to be changed periodically.

For some users, the Neva 4511 column lasts a long time, for others it breaks quickly. The quality of the assembly of the device and compliance with the rules of operation affect the term.

Possible column malfunctions and their elimination

If the Neva-4511 geyser breaks down, is do-it-yourself repair possible or not? Minor problems are easy to fix on your own. Let's look at the reasons for some of them.

The water heater switches off after a short period of operation:

1. Low traction. It is necessary to clean the chimney and check the connection of the exhaust pipe, if necessary, seal it.
2. The water leaving the dispenser is too hot (over 90 °C). Close the tap, wait 1-2 minutes and adjust the inlet water temperature (increase water flow, decrease gas flow).
3. There is carbon deposits on the flame sensor. It needs to be cleaned.

Opening the tap does not start the column, there is no spark charge:

1. Batteries don't work. They need to be replaced or installed correctly.
2. The taps are partially open. It is necessary to fully open the taps at the inlet and outlet of water.
3. Insufficient amount of water. Fluid flow should be adjusted.
4. Weak water pressure in the system. You need to contact the utility.
5. Filters clogged and/or scale has accumulated in the column heat exchanger. Needs to be cleaned.

Opening the tap does not start the column, but there is a spark charge:

1. The gas supply valve is closed. It needs to be opened.
2. There is air in communications. The problem often occurs when the column is first started and after a long period of inactivity. Open the tap, wait 7 seconds, close and open again. Manipulations must be repeated several times.
3. The spark does not enter the gas jet. It is required to adjust the distance between the electrode of the candle and the burner.

The nuances of adjusting a device such as the Neva-4511 gas water heater and troubleshooting it are described in detail in the instructions. It is important to read it carefully before using it. In difficult situations, it is better to contact specialists.

The Neva 4511 column is an affordable water heater manufactured in Russia. The device is characterized by compact size, automatic switching mechanism, low power consumption and multi-level security system. The disadvantages include the small capacity of the water heater, but for a family of 2-3 people it is enough.