Expert: the service life of a geyser is significantly reduced by hard water - News from Volgograd and the Volgograd region

Gas water heater "Neva 4511": do-it-yourself repair (detailed instructions)

If you live in a private house or spend some time a year visiting your summer cottage, then you can provide your family with hot water using a gas water heater. When the house is not connected to the central hot water supply and heating system, such a solution becomes the only correct one. Today's market is constantly being replenished with new units that satisfy consumer needs. Modern equipment only vaguely resembles its heavy predecessors.

Overview of repair options

The devices are equipped with the latest automation, they are protected by multi-stage systems and provide very high safety during operation.

Neva gas water heater is considered one of the most popular

4511”, you can repair this equipment yourself if you read the information below. But professionals do not advise undertaking such work on their own, this especially applies to those people who are not very well versed in such equipment. It is not recommended to do this if the warranty period has not yet expired, because DIY repairs will void the manufacturer’s obligations. However, if the device was purchased quite a long time ago, then it is necessary to take into account that its design is simple, thanks to which any home craftsman can handle the repair work.

Refusal to ignite

Neva gas water heater , which you can repair yourself if you refuse to ignite, is considered a budget and fairly standard model. Very often, the problem mentioned above can be caused by the fact that the ventilation system suffers due to lack of draft. If this is the case, then the damage can be removed by cleaning the channel. If the batteries are low, a problem may arise with the power supply; this issue can be solved by simply replacing it. Geyser _

"
Neva 4511", a review of breakdowns of which is discussed in the publication, may experience failure to ignite due to low water pressure in the system. In this case, the buyer can wash the filters and also clean the device from combustion products. If this approach does not solve the problem, then you need to contact the utility service with a question about the low pressure.
Neva

gas water heater still does not light up , you can carry out independent repairs by adjusting the temperature of the coolant. This decision is important if the balance between cold and hot water is considered incorrect.

Setting details

When setting up a gas water heater, you need to remember that the liquid cannot reach a comfortable temperature instantly. Don't try to do all the settings for a few minutes - it will take quite a long time. After each stage, you will have to start all over again, namely, drain the waste water and let it heat up or cool down with fresh water. In general, such manipulations can last for half an hour, and sometimes longer. An experienced professional will take much less time.

When setting up equipment from different companies, for example, a Neva gas water heater, you may encounter two difficulties:

fluid pressure;
weak water pressure that does not cause a reaction from the device;

Blood pressure problems

Pressure fluctuations can be caused by a variety of conditions. When faced with this, there is no need to panic; the situation can be easily solved by replacing a worn valve or purchasing a special pressure regulator. This malfunction can cause serious damage and accelerate equipment wear.

Poor pressure

To eliminate the problem, it is enough to replace the leaky membrane. In general, this breakdown does not cause problems, but if the owner needs a lot of hot water, for example, for washing dishes, the column may not be able to cope with heating a large flow.

Setting up the heater yourself can take a long time, and the result may not always be satisfactory. It is best to entrust this procedure to a professional.

Source: Tehnika.expert

The problem of ineffective water heating

If your home has gas water heater Neva

4511”, you can carry out independent repairs of this equipment. This also applies to the case when the water does not heat up very well, as required. If the equipment turns on, but the water temperature cannot reach the desired level, then the equipment simply may not meet the power needs of the consumer. The second assumption is that the column is dirtier. In this case, the equipment loses productivity. In order to solve the issue of ineffective water heating, you can adjust the coolant supply tap or seek the help of a professional service center, he will be able to clean the equipment.

Heat sensor failure problem

Geyser _

“
Neva
4511” (automatic) is protected by a multi-stage system, but even with this, it happens that
the column
does not ignite.
The culprit for this is considered to be a bimetallic temperature sensor; it is designed to protect equipment from overheating. In most cases, a breakdown occurs in the fact that the burner goes out, and the column
works for a certain time, but then stops, and attempts to ignite do not achieve results.
After 20 minutes, the column can be turned on again, the burner will light up, but after a similar time period it will go out again. This may be caused by the sensitivity of the equipment. This case is guaranteed; moreover, the problem appears only in summer or winter; it appears at extremely low or excessively high temperatures when the windows in the kitchen are closed. Under these circumstances, the room temperature is elevated and the equipment is not cooled. If you have Neva gas water heater , a breakdown in the sensors can also be expressed by a chaotic shutdown of the device. Sometimes it doesn't ignite at all. The behavior may indicate deterioration of the sensor conductor insulation. A short circuit to the housing causes the safety valve to operate. In this case, it is useless to call gas workers, since the problem is not related to the gas part. There is also no way to solve it with your own hands, so the best thing to do is contact the warranty center.

Replacement of membrane tissue

Before replacing membrane fabrics, turn off the equipment and turn off the cold water and gas. One of the hot water taps opens, which will make it possible to relieve pressure in the pipes. In another step, the column casing is removed, and then the screws for fastening work, which are located under the decorative overlays. The technician should confiscate the water regulator; to do this, the motor nuts are unscrewed. Now we are starting the procedure for replacing membrane tissue. Neva gas water heater repaired?

4511" with your own hands, the main thing is to ensure that the component being replaced does not have to be placed upside down. The main thing is not to close the bypass channel. Then you can assemble a gas-type column, proceeding in the reverse order. The main thing is to install all the gaskets in place, so you need to treat this step with great attention, but if you have experience, these actions will take no more than 15 minutes.

Parameter table

Neva geysers are available in 12 models. They have different characteristics, which are discussed in detail in the comparative table.

Models differ in design, number of possible connections, power, heating volume per 1 minute. Capable of operating at low water supply pressure. Equipped with a multi-level security system and made of high-quality materials. The manufacturer provides a long warranty on the equipment. Instructions for each speaker are included in the package.

We recommend an article on the topic! Technical characteristics of geysers Vaillant.

Repair, installation and breakdown of the Neva gas water heater.

It is necessary to consider how the column , how to repair the column, its structure. I am repairing dispensers running on Neva in Stalingrad.

Column

Neva brand is a fairly common water heater . A lot of them were produced, and they were installed in Stalingrad too. At one time, VPG Neva captured the market with its affordable price, reasonable quality and commonality. From my own experience, I can say that breakdowns on the Neva in most cases occur within the 5th-6th year of use. This is associated either with a broken microswitch, or with a leak in the water block rod seal, or with the fact that the membrane fabric is torn. the column usually does not light up. Spare parts for the Neva are not a problem; it is not difficult to purchase them in Stalingrad and other regions of the country. Today I will briefly tell you about the structure of the column. After reading the publication, you will be able to repair the Neva
.

We see the entire view of the speaker with and without a housing in the photo below.

Column

consists of a gas block – 1,

water block 2,

groups of ignition and ionization electrodes 5,

battery compartment -6

and ignition and column control unit (brains) -7

In this case, the heat exchanger on the column burned out. This can be seen even without removing the housing from the spot on it, but the appearance of the heat exchanger itself does not need any comment.

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. So, for a small apartment, an excellent option would be to 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 the family budget on repairs and maintenance of the unit.

Expert opinion

Valery Drobakhin

VK design engineer (water supply and sewerage) ASP North-West LLC

Ask a specialist

“Before purchasing a new Neva pump, it is mandatory to measure the pressure in the water main (peak values). They need to be compared with the data provided by the manufacturer. If the minimum pressure value does not correspond to the passport data, the column may not turn on or will work intermittently from the first days.”

So, let's begin disassembling and repairing the Neva column:

1. Unscrew the union nuts on the tube connecting the heat exchanger with the water block of the column and remove the tube.

2. Separate the wires on the connectors that fit the solenoid valve (1) and the microswitch wire connectors.

3. Unscrew the screws that attach the gas

column block to the body.

4. Remove the battery compartment (you need to unscrew the two self-drilling screws under the cover). Unscrew the screws that secure the column water block to the housing.

5. Unscrew one self-drilling screw on both sides of the gas column burner and remove the completely water-gas gas assembly with the burner.

6. Now you can easily get to the self-drilling screws that secure the column heater to the housing from below.

7. Next, unscrew the draft meter from the cap.

8. Now let’s unscrew the overheating temperature meter from the heating device.

9 Unscrew the self-drilling screws that attach the cap of the Neva

to the heat exchanger and housing.

10. Unscrew the temperature sensor from the heat exchanger and unscrew the screws that secure the section of the heat exchanger pipe to the column body.

Actually, the large-scale disassembly is done. I hope this article will be useful to you when repairing the Neva .

If you would like to call a geyser technician in Stalingrad, then call or leave a request on the resource. Neva gas water heaters in Stalingrad and nearby villages. I will repair your gas water heater. Spare parts for the Neva are available.

Neva gas water heater useful. Download

Design and working principle of the Neva 4511 model

It is impossible to repair a home appliance on your own without knowing how it works and what it is made of. Unlike old-type water heating devices, this series of gas-powered water heaters is equipped with a controller and electric ignition, which makes it possible to remove the regularly burning pilot wick. Otherwise, the design remains very simple and repairable. It consists of the following important elements:

Housing with hinges for wall installation process.
Diffuser – a collection of combustion products with a piece of pipe for smoke exhaust.
Copper heat exchanger.
Installation of gas burners.
Water node.
A serviceable membrane component (in other words, a frog).
Gas
valve with an electromagnet, combined by a common rod with a water unit.
Controller.
Microswitch for supplying power to the electronic unit.
Water supply pipes.
Ignition electrode.
Flame (ionization) meter.
Additional electrode for igniting the burner.
The tap is a flow regulator.
Adjustment of combustion intensity and heating temperature.
Connecting a draft sensor placed in the middle of the diffuser.
Compartment for power components (batteries).

The diagram above shows the structure of the Neva

with numerical designations of parts corresponding to the list.

Automated switching on and heating are controlled by the water unit simultaneously with the controller, and a solenoid valve connected to a draft sensor is responsible for the non-hazardous gas supply. The operating method of a water heating device looks like this:

After opening the hot water tap, pressure appears at the inlet of the “frog”, acting on the rubber membrane fabric of the assembly. It moves the rod, which opens the gas
valve and closes the microswitch contacts.
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 meter detects the occurrence of a fire and transmits an impulse to the electronic unit, which interrupts sparking. The heater goes into operation mode.
When the valve on the mixer is closed, the pressure in the network disappears and the spring throws the membrane fabric of the “frog” back, simultaneously closing the mechanical gas valve. The limit microswitch is triggered and the controller is deprived of power, and at the same time the electromagnet is deprived. The fuel supply ends and the burner goes out.

Important point. The solenoid valve is combined into one circuit with a traction sensor (item 16 of the diagram). If, for a variety of reasons, the draft in the chimney disappears or weakens, the meter will heat up and open the circuit, de-energizing the electromagnet. The final one will return to the “closed” position and shut off the gas supply to the burner device.

To eliminate the permissible overheating of water in the heat exchanger, the manufacturer has implemented a conventional technical solution: a temperature sensor connected to the controller is mounted in the pipe wire. If the flow heats up to a critical level (about 90 °C), the gas supply will automatically end and the burner will go out. the Neva 4511 column is shown more clearly

Unit characteristics: power, performance, ignition

Geyser BaltGaz NEVA 4511 Glass
The company BaltGaz produces Neva geysers. Its main production is concentrated in the Northern capital of the Russian Federation - St. Petersburg. Different speaker models differ according to the following criteria:

Maximum power. The range is quite large: from 15.4 (Neva 4508) to 28 kW (Neva 5514). A low-power column is effective if you do not plan to use hot water in the kitchen and bathroom at the same time. Otherwise, it is worth purchasing a unit with a power of 26 kW or more.
Performance. The volume of water that the heater passes through itself in 1 minute is indicated here. The minimum value for BaltGaz dispensers is 8 liters. Maximum - 14 l. The larger the family, the higher productivity should be. This parameter also depends on the number of hot water taps in the apartment.
Ignition type. In almost all Neva heaters it is automatic. The unit starts working immediately after opening the tap, and after closing it the flame goes out. This requires batteries that last up to 3-4 months. Only three models (4510Р, 4511 Р and 4513 Р) have a piezoelectric element. A small flame burns in the column all the time. To start the unit, you need to press and hold the ignition button for a while.

Attention! All models in this line are flow-through. They are characterized by a small tank size and quickly heat water. The warranty period is 5 years.

Water heater repair

Neva geyser with your own hands , you need to identify it correctly. Over the years of using a water heating device, one part of the parts wears out and requires replacement, while others require periodic maintenance. In this case, various breakdowns appear, characterized by specific symptoms. We recommend dividing all emerging problems into groups according to the following criteria:

The burner does not ignite when the DHW system tap is opened;
After working for 5-10 seconds, the device turns off;
the flow-type heater starts up and functions properly, but does not heat the water well;
other breakdowns.

Advice. Very often, in geysers, the rubber membrane fabric of the water unit fails - it stretches, cracks or breaks. This is a consumable spare part that you should always have 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 respond at all to turning on the hot water, you need to do the simplest thing - check the condition of the power components and battery compartment contacts (they may oxidize). Clean them with sandpaper, install a new set of batteries, and then try to ignite again.

Decisive moment. A glowing home appliance monitor does not indicate that the power components are fully charged, because 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 properties posted on the manufacturer's official website, the set of components lasts approximately 250 working hours.

Placement of the battery compartment - bottom view of the device

Is everything okay with the electrical supply? Then continue checking the gas water heater using this method:

Make sure that there is enough pressure in the water supply to turn on the device. Perhaps someone accidentally closed the shut-off valve or control valve on the heater itself (on the right side).
If there is a strainer on the incoming water supply, you need to check its condition and clean it if necessary.
Remove the front panel of the device and open the DHW tap, observing the stem. If it does not move at normal water pressure, the reason is hidden in the membrane tissue of the “frog”.
The rod has moved, released the switch button, but nothing happens? There is a problem with electrically powered circuits. It is necessary to check the microswitch and test other wires supplying the controller and solenoid valve.

Advice. When repairing the Neva , which involves disassembling the unit, just in case of fire, shut off the gas main.

To dismantle the front casing, you need to remove the plastic handles from the control valves and disconnect the monitor connection connector. The panel is held at the back by 2 self-tapping 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 fabrics in the Neva 4511 column, it is necessary to remove and disassemble

water unit at the same time as the gas unit, following the instructions:

Close the cold water and gas supply, unscrew both supply pipe sections with a wrench. Also disconnect the copper pipe leading to the heat exchanger.
Disconnect the controller and microswitch connectors.
The entire water- gas block is fixed with 2 screws to the flange of the burner device. Unscrew them with a Phillips screwdriver and remove the assembly.
Disassemble the “frog” and change the membrane fabric, and at the same time the tiny O-ring shown in the photo.

Note. The replacement can be done without dismantling the entire block, but performing the operation in this position is very uncomfortable. The described disassembly technique is also suitable for other models of gas-powered dispensers - Neva Lux 4510, 5611 and so on.

How the membrane fabric of a flow-type water heater changes, 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 meter, which 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 can be corrected by simply bending it. Occasionally, it is enough to clear the end of the electrode of soot to increase the spark power.

The operation of traction and overheating sensors is studied by directly closing their contacts. Set the jumpers on each device in turn, including the water on the mixer. If a flame appears, replace the broken meter.

After starting the burner goes out

If the flame in the column ignites properly simultaneously with the onset of water intake, and goes out after 5-10 seconds, then the possible reasons are as follows:

the ionization meter does not work (does not detect fuel combustion);
there is no draft in the chimney, which causes the suitable meter to overheat and open the electrical circuit;
The highest heating is set with low water consumption, which is why its temperature can quickly reach 90 ° C and the overheating meter is triggered.

The last 2 breakdowns do not depend on the water heater and are removed by the client individually. Sometimes the damping effect is performed by an overstretched membrane fabric: at the first moment after water supply, it moves the rod, and when the pressure in the pipe normalizes, it releases again.

The flame meter fails for three reasons:

The electrode is covered with a thick layer of soot and requires cleaning.
The “spout” of the device has bent down due to prolonged exposure to temperature and needs to be slightly bent upward, as shown in the video.
The device has stopped working and needs to be replaced.

There is another situation: the hot water tap is turned off, but the burner continues to work. There is a jamming of the rod, which can be eliminated by disassembling and cleaning the water-gas block.

How to remove low heat

There are two reasons for this phenomenon: dirtier burner nozzles and deposits in the tubes of the heat exchanger. In the first option, the blue color of the flame changes noticeably to yellow or reddish, and the gas burner device begins to smoke. To fix it, it’s best to call a gas service technician, but if necessary, you can handle it on your own:

Shut off the gas supply.
Remove the burner by unscrewing the clamping nut on the gas pipeline and 4 screws, not shown in the photo.
Blow dust off the assembly using an accessible method, and then wash with a weak soap-based solution.
Dry the device and reassemble the column in reverse order.

If the burner operates properly, but the water does not heat up, then it is necessary to wash the heat exchanger. The manufacturer provides for the simplest removal 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. Then immerse the heat exchanger in a bucket of citric acid solution (100 grams per 1 liter of water) and wait until it eats away the scale. After careful washing and drying, reinstall the component.

Advice. When reassembling the heat exchanger, it is best to replace the rubber gaskets located in the middle of the union nuts.

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 respond in any way to turning on the hot water, you need to perform the simplest action - check the condition of the batteries and battery compartment contacts (they may oxidize). Clean them with sandpaper, install a new set of batteries, and then try to ignite again.

Important point. The glowing display of a 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.

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 it does not move at normal water pressure, 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 need to remove the plastic handles from the control valves and disconnect the display 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 replace the membrane in the Neva 4511 dispenser, remove and disassemble the water unit along with the gas unit, following the instructions:

Close the cold water and gas supply, unscrew both supply pipes with an open-end wrench. Also disconnect the copper pipe leading to the heat exchanger.
Disconnect the controller and microswitch connectors.
The entire water-gas block is 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: