Neva 4511 DIY repair

If you are faced with a breakdown of a water heater, do not panic - our article will help. Malfunctions of the "Neva" gas column can happen for various reasons, but typical ones can be distinguished. We will tell you how to repair Neva models at home.

Important! If your equipment is under warranty, do not disassemble it yourself, otherwise you will lose free service.

How to understand the location of the water heater components? Don't worry, the diagram will help you. It is based on Neva speakers.

1. Metal casing.
2. Control window.
3. Gas flow regulator.
4. Water regulator.
5. Digital indication of temperature.
6. Cold water connection (thread G 1/2).
7. Hot water outlet.
8. A branch pipe for connecting to a gas line (cylinder).
9. A branch pipe for the removal of combustion products is connected to the chimney.
10. The foundation. Back wall.
11. Installation holes.

• 6, 7, 8 - continued, nozzles, as indicated above.
• 12 - water unit.
• 13 - water regulation rod.
• 14 - drain plug.
• 15 - microswitch.
• 16 - control unit.
• 17 - gas unit.
• 18 - fuel adjusting rod.
• 19 - solenoid valve.
• 20 - collector.
• 21 - collector fixing screws.
• 22 - burner nozzles.
• 23 - spark plug.
• 24 - ionization sensor.
• 25 - copper heat exchanger.
• 26 - output to the water unit.
• 27 - outlet to the gas unit.
• 28 - mounting bolts.
• 29 - thermal relay.
• 30 - thermometer.
• 31 - gas outlet device.
• 32 - thrust sensor.
• 33 - mounting brackets.
• 34 - battery compartment.

Having understood the design, you can start troubleshooting.

Video (click to play).

The indicated malfunctions and options for their elimination are suitable for all models produced by "Neva", including: 4510, 5514, 4511, 4513, 4510M, 4513M, 4610, 5611. We will separately consider error codes and breakdowns on the example of some models.

You will need to remove the cover to access the inside of the instrument. How to do it yourself:

• Be sure to shut off the water and gas supply.
• Pull the adjusters towards you and remove.
• Some models have a screw behind the adjuster. Unscrew it.
• Disconnect the temperature indicator wiring.
• Remove the casing securing bolts.
• Pull the trim towards you a little, then up.

You can start repair work.

Reasons for the appearance and ways of troubleshooting.

The burner does not ignite. No spark... In this case, the temperature indication does not work when the mixer is opened.

• Weak water pressure. If the pressure in the tap is small, you need to wait until the flow is restored. The installed model may be too powerful for your plumbing. Also check the adjustment toggle switch, set to the maximum value. For frequent pressure problems, it is recommended to install a circulation pump.
• The batteries are dead. Some users are confused by the scoreboard. If the display is lit, the user thinks the batteries are ok. But lighting a candle requires more current. It is important to choose high quality batteries.

The manufacturer recommends installing LR20 (alkaline) batteries. Therefore, salt cells such as R20, which are sometimes used, will not give stable performance. An alternative to the LR20 is the CR20, but the cost is much higher. To replace, turn the knob in the battery compartment.

Expert Advice: Check food contacts more often. The technique works with water, so the contacts are susceptible to corrosion and chemical deposits.

• Defective flow sensor. Inspection and replacement required.
• Wear of the rubber membrane. This can be understood by visual inspection.Open the mixer and see how the pusher works. If it does not move, then the membrane is damaged or stretched (marked with a blue arrow in the photo). Red arrows mark places that are susceptible to leaks.

You can remove the water part together with the gas part. The dismantling procedure is marked with letters:

• a - after turning off the fuel supply, the supply hose is unscrewed.
• b - the cold water nut is loosened.
• c - the nut of the water block and the radiator pipe is unscrewed.
• d - the wiring of the solenoid valve is disconnected.
• d - the microswitch loop is disconnected.
• e - the bolts of the flange connection are unscrewed.

Broken electronic board requires a call from a specialist.

Breakdown on the body of the device. A clicking sound is heard, as when a spark is formed, but no ignition occurs. This means that the insulation of the candle is broken. If defects are found during inspection, a serviceable part must be supplied. Also, the cause of the breakdown is a violation of the tight connections of the cable with the control unit. Return the cable to the socket.

The display allows the user to see the fault code. Self-diagnosis of the column gives a digital value in case of a malfunction.

E0 - the boiler shuts down. Fuel does not flow into the system. Check the gas valve; the supply may have been shut off for a short time.

Error E1 - the control board does not receive a signal from the flame sensor. More than a minute passed.

• Air in the gas pipeline. This happens when the device is turned on for the first time or when the device is turned off for a long time. Open and close hot water several times until the burner ignites.
• The fuel supply valve is not fully open. Unscrew the tap.
• Insufficient pressure in the gas line.
• The tank has run out of fuel. The cylinder needs to be replaced.
• Violation of the wiring between the water unit and the flame sensor, solenoid valve. Examine the loop for damage to the insulation.
• The electrode has moved out of place, does not reach the burner. Return the part to its original location.
• Soot is present on the electrode and flame sensor. You can clean the parts with a brush.
• The contacts between the spark plug and the high-voltage wire are removed.
• The nozzles are clogged with soot.

The burner must be removed for cleaning. Disconnect the wiring and unscrew the nipple nut. Unscrew the two manifold bolts, then do the same with the burner mounts. After dismantling, the holes are washed with a brush and soapy water. Reassemble after rinsing and drying.

E3 code - the solenoid valve was triggered earlier than the signal from the flow sensor.

• The valve is defective. A new element is being installed.
• The electronic unit has broken. Diagnosis is carried out by a specialist.

Error E7 - after 7 attempts to ignite, the equipment still does not light up or goes out.

• Open the fuel valve as far as it will go.
• The ionization sensor has moved or soot has accumulated on its electrode. It should be in the flame area, near the burner. Cleaning is done with a brush.
• The electrical valves are out of order.
• The water or gas block has boiled. Replacement of elements.

Error E8 - the thrust sensor has been triggered. Causes:

• The sensor is broken. See if the contacts are tight, change the part.
• The chimney is clogged with debris or soot. If you cannot clean the passage with your own hands, contact your utilities.

L0 - not enough fuel is supplied for normal operation. What happened:

• Weak water pressure. The line pressure acts on the diaphragm, which opens the valve. Wait for the flow to recover, adjust the toggle switch, or descale the radiator. How to do this is described in the article on cleaning and repairing a gas column heat exchanger.

• The temperature at the controller is too low. Increase your metrics.
• The pressure in the gas line exceeds the permissible limits. Install the reduction gear.

Such malfunctions are typical for the Neva 3208 and Neva Transit models.

The device works for a while, then turns off... Draft problems that can arise from blockages or improper installation of the hood.

Typical user mistakes:

• The ventilation pipe is installed too close to the wall of the chimney, normal draft is not generated.
• Another device or hood is connected to one pipe.
• There is another window on the level with the ventilation of the column.

The column does not light up or immediately goes out... The temperature sensor is triggered.

• Overheating has occurred.
• The part is out of order.
• The membrane is stretched.
• Flame sensor does not work.

Display does not work:

• The thermal sensor is out of order. Need a replacement.

• Contacts broken.
• Display defective.

The equipment is very noisy:

• Twist the water regulator. Reduce the head.

• The gaskets in the pipe joints protrude out of place. Replace the gasket.

You have learned the structure of the Neva water heater, its typical malfunctions. You can start fixing the problem. We hope our article helped you get the technology back on track.

The geyser NEVA 4511 is a compact water heating unit with a rated power of 21 kW. This indicator is quite enough to provide apartments and country houses of various sizes with hot coolant.

The geyser NEVA 4511 is a budgetary and fairly compact technique that is convenient and easy to use. The burner flame is ignited with batteries. The built-in LCD display informs the user about the key parameters of the unit operation. The design provides for the presence of a water cooling system for the combustion chamber. The modest dimensions of the unit make the column invisible in any room, which can be considered as an additional plus.

The device of the NEVA 4511 geyser is quite simple, but at the same time modern technical advances in efficiency and safety are not alien to it. This model is manufactured in accordance with domestic and international requirements for equipment of this kind. This suggests that the manufacturer takes a responsible approach to the design of water heating equipment, taking care of both the consumer and his reputation in the international market.

Speaking about the device of the NEVA 4511 geyser, it should be noted that the device is designed for easy operation. The technique starts automatically when the hot water tap is opened and dies out when the user turns off the tap. With the inexpensive and reliable 4511 series NEVA speaker, you can forget about the burning wick, which can become a serious hazard. The fact that the column is fired from batteries ensures the durability of the main components and prolongs the life of the unit as a whole.

Let's highlight a number of advantages with which this column is able to please a potential buyer:

• Compactness and ergonomics. The dimensions of the unit are very modest and amount to 565x290x221 mm. At the same time, the entire structure is designed in accordance with the best ergonomic standards - a convenient control panel and a minimalistic design are characteristic features of the model.
• High performance. The design of the NEVA 4511 geyser took place taking into account the fact that the equipment will operate mainly in the difficult conditions of the Russian climate. Because of this, it has been made tough, strong, durable, and highly productive. In addition, the 4511 model is adapted to work in conditions of low pressure in the water supply system, which can be considered an important plus for users from our country, where interruptions of this kind occur quite often.
• Safety and reliability. The unit is equipped with a flame control sensor, which reduces the risk of an unforeseen accident hundreds of times.

It is obvious that any domestic water heating equipment has a number of disadvantages. In this regard, the NEVA 4511 model is also far from ideal. With a rated power of 21 kW, it produces up to 11 liters of hot coolant per minute.

Experts are sure that the equipment "will not cope" with its work if water is taken from two points at the same time.For example, washing the dishes while someone in the household is taking a bath can be difficult. The power of the unit is not enough to provide two points of water intake with sufficient hot water. In addition, the design does not provide for a smooth flame modulation system, which cannot be said about more modern speakers.

Very often on the network you can find requests like "geyser NEVA 4511 do-it-yourself repair". That is why typical malfunctions and methods of self-elimination will be given below.

If the column does not light up, there can be many reasons for this. Among them:

• Lack of traction in the ventilation system. The problem is solved by cleaning the ventilation duct.
• Problems with the power supply (batteries dead). The problem is solved by replacing the power supply.
• Low water pressure in the water supply system. You can independently wash the filters, clean the column from combustion products and replace the membrane at the water unit. If the problem persists, contact the utility service with appropriate inquiries about the cause of the low pressure in the system.
• Incorrect balance between cold and hot water. In this case, you need to adjust the temperature of the coolant produced by the column so that you do not have to mix cold and hot water.

As a rule, the reason for this is that the ventilation is clogged, the supply batteries are discharged, the gas is supplied too intensively, or the nozzle is clogged. In all these cases, it is recommended to consult a specialist. On your own, you can replace the batteries or clean the ventilation ducts.

If the column turns on, but it does not heat the water to the required temperature, there may be several reasons for this. First, your equipment may not meet your power needs. Secondly, if the column is clogged, it loses in performance, and this must be taken into account. You can adjust the hot coolant supply valve and call a specialist from the service center who will clean the equipment.

The fact that the repair of the NEVA 4511 gas water heater can be done by hand makes this model a very attractive unit for the Russian buyer. At the same time, the column is inexpensive, has been functioning for decades and does not require special care during operation. Being a universal domestic water heater, NEVA 4511 is ideal for use in Russian houses and apartments.

Warning. This section is intended for specialists who have the appropriate permission to repair gas equipment! If you repair yourself during the warranty period, the warranty is void!

This article will focus on malfunctions of Neva speakers (models 4510, 4511, 4513, 4510M, 4513M, 4610, 5611). Many Chinese speakers, such as Vecktor or Oasis, and not only Chinese ones, work on the same principle as the Neva, so the remedies below apply to them as well. But, please be more careful, the photographs in the article show details for the Neva columns.

No spark when hot water is opened.

When the hot water tap is opened, there is a spark discharge, but the column does not ignite.

1. Check if the hot water tap in front of the column is open.
2. There is no gas in the main gas pipeline. You need to call the service to fix the problem.
3. Check the serviceability of the EMC. Connection contacts may be broken.
4. Correct the spark plug, it is possible that the discharge does not reach the flow of the gas-air mixture (about 5 mm from the end of the plug to the burner).
5. When using a column from liquefied gas, it is necessary to check the gas supply in the container (cylinder).
6. Weak spark from spark plug electrode. It is required to clean the contacts of the battery compartment or to completely replace the ignition elements (batteries).

The column will run for a while and turn off.

1. Poor cravings. Thrust sensor triggering. It is necessary to clean the chimney or check the tightness of the exhaust pipe connection on the column pipe.
2. Overheating of water (outlet water temperature is more than 90C, triggering of the limit temperature sensor). It is necessary to use the column control knobs to reduce the gas consumption and increase the water pressure.
3. Replace the membrane of the water unit.
4. There is no signal from the ionization sensor (flame sensor). In this case, the burner works for no more than 7 seconds, and spark discharges from the spark plug do not stop. It is necessary to restore contact with the sensor, correct its position (if it touches other elements of the burner) or replace it.

The water temperature reading is not shown on the column display.

1. Defective water temperature sensor. It needs to be replaced.
2. Check the connection contacts of the display itself to the ignition unit. If there is no result, replace the display.

The water does not heat up well.

1. Reduce water pressure.
2. It is required to check the heat exchanger for the presence of scale on its walls. If necessary, remove it and rinse with Solita. It is also necessary to clean the column burner from dust and soot on its surfaces.
3. Insufficient gas pressure in the line - call the service to eliminate the causes.
4. Repair or replacement of the water unit is required.

The flame of the burner of the column is yellow and weak, with smoky tongues.

1. It is necessary to clean the column burner from dust and soot on its nozzles and internal surfaces.