The domestic gas water heater Neva is a product domestically developed, as well as the Astra and Oasis speakers. Already from the name alone it becomes clear that devices under this brand are manufactured in St. Petersburg. Potential buyers have a variety of speaker models to choose from, differing not only in performance, but also appearance. A total of nine model lines are on sale. Advantages of Neva geysers from the manufacturer NevaGaz:
- The presence of flame modulation in advanced models - due to this, automatic support of the set water temperature is achieved;
- A special series of designer columns - for those who appreciate beauty;
- Availability 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 cost of equipment - compared to similar models from other manufacturers, geysers Neva are relatively cheap.
Each manufacturer is ready to praise their products at any time of the day or night. What do users say about Neva geysers? We learn about this from customer reviews.
What does a buyer who wants to purchase a gas water heater focus on? Of course, based on reviews from other customers. Let's find out what user reviews are about Neva geysers.
Geyser Neva Lux 5514
We bought this speaker with the expectation that it could provide solid performance. With a power of 28 kW, this unit produces up to 14 l/hour, and this is quite enough for taking a shower and washing dishes at the same time. Despite the fact that the Lux 5514 geyser is a domestic device, it performs well. The model is reliable, heats water very quickly, has extremely clear controls - 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 price, analogues from foreign manufacturers are more expensive;
- Electronic ignition starts automatically, you just need to open the tap. The absence of a pilot allows you to save on gas.
Flaws:
- It seems to me that it is a little noisy, analogues are quieter;
- No automatic maintenance water temperature, so when the pressure changes or the second tap opens, the temperature changes slightly;
- The batteries need to be changed frequently, and she doesn’t want to run on cheap batteries;
- Sometimes it goes out due to inexplicable reasons. Thank God this happens quite rarely.
Geyser Neva 4511
We needed an inexpensive speaker from famous 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 enough hot water. True, when opening the second tap, the heating temperature changes slightly, but this is easily corrected with the help of a mixer. Therefore, this behavior is not a disadvantage. There is a small display on the front panel that shows the temperature of the hot water. There are two knobs nearby to regulate the temperature. Just above there is a small peephole to control the combustion of gas. But the design of the speaker is as if it had been chopped out with an ax whole piece iron is a mere rectangle. But it is quite reliable, although it is not without 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 there has been no leakage, which indicates the reliability of the assembly and heat exchanger;
- Convenient temperature and pressure adjustment.
Flaws:
- Sometimes the gas does not ignite immediately, but after a few seconds, which causes a strong bang;
- When overheated, it begins to make noise, like a roaring engine at high speeds. The noise appears already after +50 degrees;
- Very thin body. Not a very important flaw, but still somehow undignified. Although now all equipment is made in such cases, even washing machines.
Geyser Neva Transit VPG-10E
Anatoly
A simple geyser, cheap, but not without its drawbacks. For example, it regularly turns off because it simply 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 went glitchy. If the pressure drops, you have to adjust the heating temperature, otherwise you can simply get burned. It also seemed to me that it used up the batteries too quickly - my neighbors have the same speaker, so they change it about once every six months. Despite a bunch of shortcomings inherent in most inexpensive speakers, there were no serious breakdowns. I changed the rubber gaskets a couple of times because it started to drip, but the heat exchanger still feels fine, although the neighbors have already had to change it.
Advantages:
- There are no frills in the design, just a simple white body with two handles and an indicator;
- Lights up normally evening time when water pressure traditionally drops;
- Electric ignition, you can save on gas - whatever you say, but the piezoelectric gas igniter does not work so economically;
- It can operate on liquefied gas; you can install a water heater in your dacha.
Flaws:
- There is no temperature monitoring; with a sudden change in pressure you can get burned;
- There are no major breakdowns, only minor ones, but it takes a long time to find where the water is coming from;
- Frequent spontaneous shutdowns for no apparent reason; replacing the sensor did not help for long.
Geyser Neva 4510
They probably haven’t come up with anything worse than this column yet. How was it possible to release a model with such a flimsy heat exchanger? How could anyone even guess to make this thermally loaded unit from such thin metal? A year has passed since the purchase, and leaks have already begun. It feels like this is an ordinary Chinese column in the Russian style - they didn’t even think of eliminating the obvious shortcomings. It makes a lot of noise, drips water, and switches off periodically. Recently it completely stopped turning on the first time, I 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, and decided to add a little more money and buy a normal column. Why such insanely expensive parts?
In our recent past, the presence of a gas water heater or water heater in the house was a sign of wealth, almost like having a car. This meant that there was always hot water in the house! Now, of course hot water It’s difficult to surprise anyone, but miracle machines, geysers, do not lose their relevance.
Hot, clean, inexpensive water at any time - these are the main advantages gas water heater. Gas instantaneous water heater NEVA-4511 P of the famous Russian manufacturer designed by engineers from St. Petersburg and produced at the Armavir Gas Equipment Plant.
Geyser Neva 4511 R is one of the most famous economy class models on the St. Petersburg market. This model is ignited by a piezo element, hence the letter P in the model name.
Neva 4511 R is very compact (width only 29 cm), lightweight, so you can find appropriate place its installation is not difficult even in small apartment. Strict elegant style, the color scheme (calm white or gray metallic) is very close in spirit to the residents Northern Capital and other regions of Russia.
Many residents of multi-storey buildings experience problems due to insufficient water pressure (pressure) in the apartment. This mainly happens when the water supply system is worn out or when your house is located away from the boiler room, on the upper floors.
The geyser Neva 4511 R is specially designed for Russian conditions operation, the column can operate even at low water pressure (from 0.15 atm). In addition, it is equipped with a safety system with an ionization flame control sensor. If for some reason the flame goes out, the system will immediately shut off the gas supply itself. Changing the flame height at different water flow rates is done manually using the water temperature control knob. This model is distinguished by the presence of a durable copper heat exchanger, it is slightly larger than that of the Neva 4510 M model, without tin and lead alloys, made according to innovative technology soldering in a protective environment.
With all the advantages of the Neva 4511 R gas water heater, it is necessary to note its low power - 21 kW, with a productivity of 11 liters/min. It lacks burner flame modulation, which is found in more advanced geysers. Therefore, it is most effective to use this column if you plan to use one water collection point at a time. If you need hot water to be in the bathroom and kitchen at the same time, then you need a higher power water heater, such as Neva 4513 M and Neva 5514. The Neva 4511 R gas water heater is one of the simplest and most inexpensive gas water heaters from the Neva series.
It is worth noting important detail: most components and spare parts for Neva speakers are produced at the same plant and therefore are always in stock, you don’t have to wait for weeks and overpay several times, as for imported analogues. With us you can always find a full range of components and spare parts for Neva geysers at affordable prices.
Gas equipment is technically complex, therefore the installation and connection of any geyser should be carried out only by licensed specialists who are professionally involved in gas work. When purchasing a Neva 4511 R gas water heater, our specialists will be able to install it quickly, efficiently and for a reasonable price.
Among the huge variety of water heating equipment, it can be quite difficult for the average consumer to choose suitable model for 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 site, we will consider what the Neva gas water heater is, the criteria for choosing water heating devices and detailed review model range.
Read in the article:
When a Neva gas water heater is used, its purpose
Despite the fact that in many modern houses A centralized supply of hot water has been organized, and domestic gas water heaters have not lost their relevance. Such equipment provides comfortable living conditions for many ordinary people. Flow heaters allow you to use hot water for household needs at any time convenient for consumers and do not depend on the work of municipal utilities.
Among huge amount geysers of imported and domestic production presented on the market, it is worth highlighting the devices of the Neva brand. Products are manufactured at Russian enterprise"Gazapparat" is equipped with modern automation and has high build quality. All models are designed taking into account the operating characteristics of domestic gas and water mains, which ensures uninterrupted operation of the equipment.
The general principle of operation of Neva geysers and their types
Let's look at the operating principle of a household water heating system. gas equipment Neva and its varieties. The dispensers differ in the type of ignition of the incoming fuel, design features of the chimney, power, weight and size indicators, level of safety and the presence of additional functions.
The operating principle of Neva brand dispensers is as follows: after opening the valve, water flows under pressure into the cavity of the water-gas unit (12). It has a membrane that acts through the stem on the valve. After it opens, the gas enters the main burner (10).
Thanks to the electrode, the gas is ignited using a pilot burner (3). In turn, the water flows into the heat exchanger pipeline (2), where it is heated to a certain temperature and supplied to all intake points in the home. The principle of construction of Neva geysers is almost the same. All models have a long warranty period (for example, for the Neva 4511 brand it is 12 years).
Gas water heaters Neva: main technical characteristics
Performance
One of the main parameters of gas instantaneous water heater Neva, 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 that the unit is able to heat over a certain period of time.
Neva speakers come in low power - 17-20 kW, medium power - 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 are going to consume large volumes of hot water, you should choose models with a power of 26-28 kW.
Table 1. Relationship between column power and liquid flow
Maximum pressure
When choosing Neva water heaters, it is extremely important to take into account such a parameter as the water pressure indicator, and you should take into account its minimum and maximum values. 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 old building, in which the main pipelines are severely worn out.
The maximum pressure value indicates the degree of load that the column can withstand. For gas water heaters it ranges from 9.9–11.8 atmospheres. It is known that water hammers of a certain force quite often occur in water mains, which can completely destroy the structure of the heat exchanger.
Ignition type
IN modern models speakers for household use apply different kinds ignition of burners. A little earlier, mainly only the manual type was used, in which the gas was ignited using an open flame.
Table 2. Types of ignition of household instantaneous water heaters
| Ignition type | Image | Description |
| Ignition on a piezoelectric element |  | A piezoelectric element can be used to ignite gas in the columns. Ignition is carried out by pressing a button installed on the equipment panel. |
| Electronic |  | The column has an autonomous power source (batteries) that powers the electronic ignition unit. |
| Microturbine |  | Microturbine ignition is carried out by a hydrodynamic type generator. The water flow acts as a propulsion device and 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 decreasing or increasing the water pressure.
Using modulation, you can use water of a certain temperature, and the water dispenser will work normally, regardless of the number of floors and the pressure in the main line of the house. 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 what kind of heat exchanger is installed on it. The structural element made of steel, as well as copper of simple and high purity. In the first case, the equipment is inexpensive, heavy, and characterized by high operational reliability.
Heat exchangers made of plain copper are characterized by uneven heating. This happens due to the fact that the metal contains various impurities. For this reason, pipes quickly fail because cracks form on their surface.
The most reliable columns are those with heat exchangers made of highly purified copper. 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 their analogues, however, they last much longer without the need for repair work.
Type of combustion products removal
Today, the most widespread are columns with an atmospheric type of exhaust of combustion products - through 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 attract combustion air from the outside and exhaust exhaust gases outside. Such water heaters are used in residential and industrial buildings that do not have chimneys.
Security systems
Since any gas equipment is potentially dangerous, manufacturers equip dispensers with sensors. They form a safety system for units that prevent emergency situations.
Table 3. Gas water heater sensors
| Device | Purpose |
| Water pressure sensor | The device is designed to automatically turn off and turn on the gas supply while drawing water into the column. |
| Ionization sensor | If the column goes out, the ionization sensor will work and instantly shut off the gas supply to the unit. |
| safety valve | If increased pressure occurs in the column, the valves shut off the supply of water and gas to the system. |
| Temperature difference monitoring 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 an ionization sensor. If it does not work, they block the flow of gas into the column. |
| Heating status sensor | Used for control operating temperature all components 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 water heater is turned off and the water tap is open, gas will not flow into the system. |
| Traction control sensor | If the draft is insufficient, the device will not allow the column to turn on. |
Model range of geysers Neva
Gas water heater Neva 4510
One of the popular models is the Neva 4510 gas water heater. The unit is equipped with an electronic automatic system ignition The productivity of 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/hour of liquefied gas, and natural gas - 1.95 m³/hour. Device dimensions: 648×356×218 mm.
Gas water heater Neva Lux 5514
Neva Lux 5514 is one of best models household geysers, which according to the main technical indicators not inferior famous brands. TO design features unit should be classified as:
- presence of a traction 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 water heater power is 28 kW, productivity is 14 l/min, and the device weighs 12 kg. These indicators are quite enough to ensure uninterrupted operation of the unit to supply hot water to two intake points simultaneously. 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 part of the screen of the Neva Lux 5514 unit there is a rotary regulator, thanks to which the operating parameters of the equipment are adjusted.
The presence of an electric ignition system ensures economical consumption of gas consumed, so payment utility payments comes at a fairly low price. The Neva Lux 5514 geyser is characterized by stable, silent operation, and the occurrence of unit malfunctions is quite rare.
Gas water heater Neva 4511
If you need a powerful instantaneous water heater, you should pay attention to the Neva 4511 model. It has 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 about how to properly connect the device to the water supply system, gas mains or liquefied gas cylinder in the operating instructions. According to user reviews, the Neva 4511 gas water heater copes well with several points of consumption simultaneously. The weight of the water heater is 11 kg, the dimensions of the device are 565 × 290 × 221 mm. The model is equipped with automatic electronic ignition and has water cooling combustion chambers.
Video: “The Neva 411 column does not light up - a method for troubleshooting”
Gas water heater 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 unit productivity is 13 l/min. With a weight of 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 high degree security. The power of the unit is quite enough to supply hot water to several consumers at the same time.
Technical characteristics of the gas water heater 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 productivity is 6.5 l/min. The column is installed in a vertical position, the supply lines are from the bottom.
The device weighs 19.5 kg and its dimensions are 730x390x280 mm. The column is equipped with an electric ignition system. If the Neva column does not light up, most likely the breakdown is due to a malfunction of the heat exchanger. It can be eliminated by flushing the pipeline.
Gas water heater Neva Transit
Let's look at the operating features of the Neva Transit family of dispensers using the example of the VPG-EM model (there are also VPG-E I, VPG-E, EMT with a power of 12−24 kW and a capacity of 6−12 l/min). Flow units maintain the specified 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, thereby significantly increasing the operating life of the unit.
Which geyser to choose Neva
We have already examined the main parameters that should be taken into account when choosing a geyser model. It also depends on how many sampling points the column must provide. Yes, for small apartment excellent option will purchase the Neva 4510 model. A power of 17 kW is quite enough to provide hot water supply.
If the unit is more powerful, the choice is obvious - the Neva Lux 5514 gas water heater. According to reviews from many users, the price of the model is completely justified. In addition, it should be taken into account that for many years you will not have to spend money from family budget for repair and maintenance of the unit.
Main problems and repairs of the Neva gas water heater
Neva column does not light up
If the Neva gas water heater does not ignite, first of all you should check the electronic unit that generates the spark. As a rule, the problem is solved by replacing it. This is quite simple to do, for which you need to remove the front screen, then unscrew the fastening bolts and remove the power wires (the new unit is installed in reverse order).
Why does the Neva gas water heater not turn on?
Let's look at the main causes of malfunctions of Neva brand water dispensers, 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 bristles.
If the column has an automatic ignition system, you should check the operation of the generator, batteries, and the power button. Most often, the unit does not turn on because the batteries are dead. It is enough to replace them with new ones and clean the contacts.
Weak pressure in 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 is to call specialists from the relevant services to clean the lines.
Where to find spare parts for the Neva gas water heater
Spare parts can be easily purchased from official dealers specializing in the sale of gas and water heating equipment. In most Russian cities 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 (request quality certificates for the spare parts offered).
Geyser Neva. Today this is perhaps one of the most popular brands of instantaneous water heaters on the Russian market. It is worth noting that this success is well deserved. Homeland of origin: Russia. The production of domestic gas instantaneous water heaters of the NEVA series is carried out by the Armavir Gas Equipment Plant.
The plant is part of the BaltGaz Group enterprises. The group specializes in the production of gas instantaneous water heaters, wall-mounted boilers, Unigar atmospheric burners, as well as the manufacture of 8-liter and 11-liter heat exchangers. "Armavir Gas Equipment Plant" is considered one of largest productions gas equipment not only in Russia, but also in the CIS countries
The Neva geyser is designed to ensure uninterrupted supply of hot water to both apartments and country houses. Neva water heaters are capable of serving 2 water points at the same time. Installed in all serial speakers copper heat exchanger, manufactured using soldering in an oxygen-free environment using innovative technology.
The Neva gas water heater is equipped with 6 security systems. The column automatically turns off under any unforeseen circumstances. Such as lack of water pressure or gas supply, poor draft or reaching water heating of about 90°C. The manufacturer sets the service life of the column to be at least 12 years.
Currently, the Neva gas water column is represented by a wide model range: NEVA-4510 M, 4610, 4011, 4511, 5111, 5514, 5611, 6011, 6014. Today we will look at the two most popular models from the NEVA family of water heaters.
Geyser Neva Neva Lux 5514 Characteristics:
Advantages of the model:
- There is a flame sensor that monitors the operation of the ignition and main burners;
- electronic control ensures ignition and gas supply
- There is a plug for draining water from the heat exchanger, preventing the column from freezing;
- Availability safety valve to protect the water heater from excessive water pressure;
- The first thermal relay ensures that the columns are turned off in the absence of draft in the chimney;
- The second thermal relay turns off the device when the water in the heat exchanger overheats more than 90°C.
- Gas is supplied to the main burner only when there is a flame, which is responded to by the ionization sensor;
- The gas supply to the main burner is blocked when the water flow stops.
- Easy one-handle operation
Geyser Neva 4511 Characteristics:
Advantages of the model:
- One of the compact ones in the line, fits perfectly into small spaces
- The presence of an ionization sensor ensures gas blocking in the event of an unexpected flame break.
- No constantly burning pilot flame
- The gas automatically lights up as soon as you open the water tap.
- Automatic ignition from batteries, display, water-cooled combustion chamber.
- The standard chimney diameter is 120 mm - suitable for most air ducts.
- Affordable price in economy class
- gas control system
- traction sensor
- ability to work at low water pressure
Sales of NEVA water heaters are supported by a wide network service centers throughout the country, which characterizes the manufacturer as responsible for its products. Gas water heater Neva has no problems with the supply of spare parts.
A distinctive feature of all models is their availability in price category, ease of operation, laconic design. Modern methods BaltGaz Group's products put their products on par with famous brands.
Dear ladies and gentlemen, if you have experience with Neva water heaters, positive or negative, we ask you to leave a short review. Perhaps your review will help the future owner in choosing.
Since the Neva gas water heater series 4511 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 instantaneous water heaters with an open combustion chamber can often be brought back to life without the need for service personnel. Let's look at what malfunctions arise during the operation of these units, as well as ways to eliminate them.
Design and principle of operation of the Neva 4511 model
It is impossible to repair a household appliance yourself without knowing how it functions and what it consists of. Unlike old-type water heaters, this series of geysers is equipped with a controller and electric ignition, which makes it possible to remove the constantly burning pilot light. Otherwise, the design remained quite simple and maintainable. It consists of the following main elements:
- Housing with hinges for wall mounting.
- Diffuser – a collection of combustion products with a chimney pipe.
- Copper heat exchanger.
- Gas burner device.
- Water node.
- Membrane actuator (so-called frog).
- Gas valve with an electromagnet connected by a common rod to the water unit.
- Controller.
- Microswitch for supplying power to the electronic unit.
- Water supply pipes.
- Ignition electrode.
- Flame sensor (ionization).
- Additional electrode for igniting the burner.
- The tap is a flow regulator.
- Adjustment of combustion intensity and heating temperature.
- Connecting a draft sensor installed inside the diffuser.
- Compartment for batteries (batteries).
The diagram above shows the structure of the Neva gas water heater with digital designations of parts corresponding to the list.
Automatic switching on and heating are controlled by the water unit together with the controller, and a solenoid valve connected to a draft sensor is responsible for the safe supply of gas. The operating algorithm of a water heating device looks like this:
- After opening the hot water tap, pressure arises at the inlet of the “frog”, acting on the rubber membrane of the unit. She moves the rod that opens gas valve and closing contacts of the microswitch.
- When the electrical circuit is closed, power from the batteries is supplied to the controller. It gives 2 commands simultaneously: open the solenoid valve to allow gas to pass through and create a spark at the ignition electrodes. As a result, the burner ignites.
- The flame sensor detects the appearance of fire and transmits an impulse to the electronic unit, which interrupts sparking. The heater goes into operating mode.
- When the valve on the mixer is closed, the pressure in the network disappears and the spring pushes the “frog” membrane back, simultaneously closing the mechanical gas valve. The limit microswitch is triggered and the controller is deprived of power, and with it the electromagnet. The fuel supply stops and the burner goes out.
Fundamental point. The solenoid valve is connected in one circuit to the traction sensor (item 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 shut off the gas supply to the burner device.
To eliminate possible overheating of water in the heat exchanger, the manufacturer implemented a simple technical solution: A temperature sensor is built into the pipeline and is connected to the controller. If the flow heats up to a critical level (about 90 °C), the gas supply will automatically stop and the burner will go out. The structure and operating principle of the Neva 4511 column is shown more clearly in the video:
Water heater repair
To troubleshoot a Neva gas water heater yourself, you need to diagnose it correctly. Over the years of operation of a water heating device, one part of the parts wears out and requires replacement, the other requires periodic maintenance. In this case, various 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 when the DHW system tap is opened;
- after working for 5-10 seconds, the unit turns off;
- the flow-through heater starts up and functions properly, but does not heat the water well;
- other problems.
Advice. Most often, in geysers, the rubber membrane of the water unit fails - it stretches, cracks or breaks. This is a consumable spare part that should always be kept in stock. A sample 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 turning on the hot water, you need to perform the simplest action - check the condition of the batteries and contacts battery compartment(they may oxidize). Clean them sandpaper, install a new set of batteries, and then try ignition again.
Important point. Luminous display household appliance does not at all indicate that the batteries are fully charged, since it does not consume much energy. If the batteries are low, there may not be enough voltage to trigger the electromagnet and create a spark. According to the characteristics published on the manufacturer's official website, a set of elements is enough for approximately 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 there is enough pressure in the pipeline to turn on the device. Perhaps 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 it if necessary.
- Remove the front panel of the device and open the DHW tap, observing the stem. If he didn't move when normal pressure water, the reason lies in the “frog” membrane.
- The rod 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 other wires that supply the controller and solenoid valve.
Advice. When repairing the Neva gas water heater, which involves disassembling the unit, shut off the gas line just in case.
To dismantle the front casing, you must remove plastic handles from the control valves and disconnect the display connection connector. The panel is held at the back by 2 screws located at the bottom of the device. Unscrew them and remove the casing by pulling it towards you and pulling it upward.
To check the limit switch, you need to disconnect the connector and test it using a multimeter or lamp tester. When the button is pressed, the circuit should be open. As for the wiring, it rarely fails, unless you come across a broken wire, which is easily fixed.
To replace the membrane in the Neva 4511 dispenser, remove and disassemble the water unit along with the gas unit, following the instructions:
- Close the feed cold water and gas, unscrew both supply pipes with an open-end wrench. Also disable copper tube leading to the heat exchanger.
- Disconnect the controller and microswitch connectors.
- The entire water-gas block is attached with 2 screws to the flange of the burner device. 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. Replacement can be done without dismantling the entire unit, but performing the operation in this position is extremely inconvenient. The described disassembly technology is also suitable for other models of geysers - Neva Lux 4510, 5611 and so on.
How to change the membrane of an instantaneous water heater, see in the next video:
There is a spark - no ignition
When sparking is noticeable at the glow plug, but the burner is inactive, you need to 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 has failed;
- whether a high-voltage wire penetrates the housing;
- whether the spark has weakened due to a clogged spark plug or discharged batteries.
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. Violation of the position of the candle is corrected by simply bending it. 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 directly closing their contacts. Place jumpers on each device one by one, including the water on the mixer. If a flame appears, replace the faulty sensor.
After starting the burner goes out
If the flame in the column lights up regularly along with the appearance of water intake, and after 5-10 seconds goes out, then the reasons may be as follows:
- the ionization sensor does not work (does not detect fuel combustion);
- there is no draft in the chimney, which causes the corresponding sensor to overheat and open electrical circuit;
- Maximum heating is set at low water consumption, which is why its temperature quickly reaches 90 ° C and the overheating sensor is triggered.
The last 2 faults do not depend on the water heater and are eliminated by the user individually. Sometimes the damping effect is created by an overstretched membrane: at the first moment after water is supplied, it moves the rod, and when the pressure in the pipe normalizes, it releases again.
The flame sensor fails for three reasons:
- The electrode is coated with a thick layer of soot and requires cleaning.
- The “nose” of the device has bent downwards due to prolonged exposure to temperature and needs to be slightly bent upwards, as demonstrated in the video.
- The device has broken down and needs to be replaced.
The opposite situation also happens: the hot water tap is turned off, but the burner continues to work. There is a jamming of the rod here, which can be eliminated by disassembling and cleaning the water-gas block.
How to eliminate low heat
There are two reasons for this phenomenon: clogging of the burner nozzles and deposits in the heat exchanger tubes. In the first case there is a noticeable change of blue color flame turns yellow or reddish, the gas burner device begins to smoke. To fix it, it is advisable to call a gas service technician, but if necessary, you can do it yourself:
- Turn off the gas supply.
- Dismantle the burner by unscrewing the clamping nut on the gas pipeline and the 4 screws shown below, not in the photo.
- Blow out the knot in an accessible way from dust, and then wash with a mild soap solution.
- Dry the device and reassemble the column in reverse order.
If the burner operates properly, but the water does not heat up, then you need to flush the heat exchanger. The manufacturer provides simplified dismantling of the element: drain the water from the column, unscrew the two connecting nuts on the tubes (shown in the photo with green arrows) and the 2 mounting screws on top. After this, immerse the heat exchanger in a bucket of solution citric acid(100 grams per 1 liter of water) and wait until it eats away the scale. After thorough washing and drying, reinstall the element.
Advice. When reassembling the heat exchanger, it is advisable to change the rubber gaskets located inside the union nuts.
Conclusion
It cannot be said that repairing the Neva gas water heater yourself is unrealistic or unacceptable. You can indeed deal with the common malfunctions described above on your own, and without any special tools. It should be remembered that the water heater is a gas-using equipment that requires a careful and thorough approach.
Design engineer with more than 8 years of experience in construction.
Graduated from Eastern Ukrainian National University them. Vladimir Dal with a degree in Electronics Industry Equipment in 2011.
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