Gas instantaneous water heaters. Geyser MORA-TOP, overview of models

08.01.2022Heading: masonry

Today, geysers are considered one of the most efficient, affordable and economical ways to organize heating and hot water supply. The safety and comfort of all residents of the apartment depends on the quality of the gas water heater. Therefore, in the event of the slightest malfunction of the equipment, they must be immediately eliminated. How the Mora gas water heater works, and how to repair the equipment - read below.

Czech geyser Mora: device, advantages and disadvantages

Mora's gas water heater is a flow type device that allows you to provide hot water to an apartment, private house and cottage. The column consists of an igniter, a gas burner, a heat exchanger, a gas-water valve block.

The principle of operation of the column is quite simple: when the tap is opened, the igniter ignites the burner, which heats the water in the heat exchanger.

Passing through the tubes of the heat exchanger, the water is heated and enters the heating and hot water supply system. When the tap is closed, the ignition goes out, the column turns off. Different Mora speakers can have different types of ignition: from a piezoelectric element and from batteries (electric). The equipment runs on natural gas, but, if necessary, it can be switched to the mode of using liquefied fuel. Such multifunctionality of columns is extremely important for the implementation of continuous heating and hot water supply in country houses and cottages not connected to the gas main.

In addition, the advantages of Mohr's columns include:

Multi-stage safety system: dispensers are equipped with overheating protection, reverse draft valves, burner flame and dry start fuses;
High efficiency (about 94%);
High efficiency even at water pressure from 0.2 atm;
Thick copper heat exchanger, which, over time, will not leak;
Sophisticated design of the burner and the system for protecting the igniter from contamination;
Quiet operation.

The disadvantages of the equipment include complaints from users about the lack of parts for the old Mora equipment on the modern market, the rather high cost of speakers. Although, the price of equipment does not exceed well-known analogues (such as, for example, Hayes). So, both Heis and Mora will cost the buyer 16 thousand rubles.

Geyser Mora Top: installation and operation instructions

The line of Czech wall-mounted speakers Mora Top consists of several models with different performance characteristics. In the floor series, the Mora 100 NTR boiler is distinguished by quality and efficiency. The Vega 16 is considered the most powerful wall-mounted model, capable of passing through itself up to 15.2 liters of water per minute. The most affordable of the Top line is the Vega 10 gas boiler. All models are produced in a compact case and differ only in the type of ignition (models marked “E” have electric ignition).

When installing and putting the column into operation, you must follow these recommendations:

Connection of equipment that has been in a cold environment for a long time should be carried out no earlier than after 120 minutes;
When installing the boiler, it is necessary to leave at least 10 cm from its side walls to the nearest objects and adjacent walls;
A distance of 40 cm or more must remain above the boiler;
When installing a thermostat, use a device with a potential-free output contact: the thermostat must not supply voltage to the water heater;
It is strictly forbidden to store explosive substances near the boiler.

The installation and operation instructions for the water heater do not recommend connecting the equipment with your own hands. It is better to install a strainer at the entrance to the system. It will extend the term of operation of the membrane and filter of the water intake unit of the column, heat exchanger tubes.

The water part of the geyser: the main malfunctions

Often, problems with the operation of the column relate to malfunctions in the gas-water block system. In order to, if necessary, be able to troubleshoot on your own, you need to know how the water part of the column is arranged.

So, the gas-water block of the column consists of:

membrane and disk;
Water supply regulator with open and closed mixer;
Venturi nozzle;
Mesh filter at the entrance to the node.

Malfunctions in the node can occur both under the influence of external factors (for example, due to damage to the speaker case, power cable), and due to wear and tear of the equipment. Most often, the incorrect operation of water-heating gas equipment is associated with the low quality of tap water, low water and gas pressure, clogged ventilation pipes.

The most common internal breakdowns of Mohr's geysers are:

Clogging of the inlet water filter of the water intake unit;
Deformation or clogging of the membrane of the gas-water block;
Blockages in the heat exchanger pipes.

In addition, often the reason for the incorrect operation of the electric column is the discharge of the power elements (batteries).

What to do if Mora's column does not light up

If the Mora column stops igniting, it is necessary to check the equipment for depressurization (leaks), external damage (both the case and the power cable). In addition, you should make sure that there is a ventilation draft and a good pressure of cold water. In the electric column, you can try changing the batteries.

If the column does not ignite after that, then it is necessary:

Clean the filter and the membrane of the water intake unit from dirt. To do this, you need to hold the parts under high pressure of water.
If there are gaps on the membrane, deformation of its edges, replace the element. At the same time, it is better to change the old membrane to a silicone one: the service life of the second one is longer.
Clean the ignition wick if the column ignites with pops and then immediately goes out.
Replace the solenoid valve or servomotor if cleaning the wick does not help.
Clean the ionization sensor electrode if ignition sparks appear, but the column does not light up.

All repairs, however, must be carried out with the water and gas supply turned off. If the column does not turn on after all the manipulations, you need to contact a specialist.

Gas instantaneous water heaters Vega are designed to heat domestic water at home and in enterprises. In water heaters of this type, the set water temperature is automatically maintained at this level, regardless of the amount (volume) of water taken.

Prices for gas columns Mora Top Vega 10, 13, 16

Advantages

minimum dimensions
uncomplicated maintenance
automatic operation
gas savings up to 10%
high efficiency - up to 92%
the most economical way to heat domestic hot water
smooth power regulation
maintaining the set water temperature

Dimensions

one of the most compact water heaters on the market
heater height - 592 mm (Vega 10); 659 mm (Vega 13, Vega 16)
heater width - 320 mm (Vega 10); 400 mm (Vega 13, Vega 16)
heater depth - 261 mm (Vega 10, Vega 13, Vega 16)
minimum diameter of the smoke channel - 110 mm

Comfort

The VEGA instantaneous water heater is equipped with a combined fitting from the German company Mertik, which allows the column to be turned on already with a water flow of 2.5 l / min.
Mertik fittings are also equipped with the function of automatically maintaining the set temperature, which is very important in case of water pressure fluctuations in the water supply system.

economy

In the discharge of geysers, VEGA stands out for the highest efficiency in the world, otherwise almost 92%.
Thanks to a small but highly efficient heat exchanger, it starts to heat the flowing water 15% faster than any other column.

Reliability

Unlike all other manufacturers that use similar valve designs, the Mertik combination fittings used in our dispensers have a different design solution, due to which the moving parts do not work in a water environment, which prevents a common problem with all dispensers, namely the flow of water in a leaky the place of connection of water and gas fittings, requiring, as a result, the change of the entire assembly.
The tubes of the heat exchanger inside are equipped with special turbulators that prevent the deposition of scale on the inner walls of the heat exchanger and ensure rapid heating of water.
The heat exchanger is made of tubes with a diameter of 18 mm, which not only significantly prevents the precipitation of salts, but also effectively cools the walls of the heat exchanger without overheating the column casing.

Safety

water temperature limiter to prevent overheating of the water in the heat exchanger
fuse for the return draft of combustion products, which prevents the penetration of gases into the room in case of clogging of the chimney
Flame protector ensures proper operation of the main and pilot burners
the column will not allow the main burner to start in the absence of water

Execution

piezoelectric ignition
removal of combustion products into the chimney with a minimum diameter of the gas neck
natural gas

Accessories

connecting set of steel flexible hoses, incl. 1/2" nuts and seals (not included with column delivery)
crimp for matching the diameters of the chimney and gas neck ROS-110/120 and ROS-110/120 mm (not included in the delivery set)

By purchasing a gas water heater, you will solve the problem of supplying hot water in an apartment or in a summer cottage. The characteristic advantages of gas water heaters are the small size of the case, rather low purchase costs and excellent thermal efficiency. Mora Tor gas water heaters are a suitable solution for equipping private and apartment buildings with hot water.

They have a multi-level security system and a simple device. The manufacturer also produces gas water heaters that use piezo ignition and are battery operated. The manufacturer produces two lines in a series of gas boilers, which differ in the principle of operation. Semi-automatic columns, in the body of which 2 gas burners are installed: ignition and main.

First, the igniter is lit using a piezoelectric element in order to start the column.
After that, the column can work completely in auto mode.
Piezoelectric ignition allows you to reduce the price of the device by about 1/3.
Mora automatic dispensers do not have an ignition wick.
Battery operated electric ignition is used.
When the DHW tap is opened, a spark appears on the main burner, which ignites the flame.
The gas supply is automatically closed after the water supply is turned off.
The column turns off when the flame goes out.

Auto columns are the most convenient in work.

The only negative is the dependence on batteries, because the batteries usually last for several months. Despite the disadvantage of having to light the burner daily, semi-automatic models are more reliable.

The principle of the device Mora Top Vega speakers

Mora gas boilers are reliable and simple equipment manufactured by a Czech company. The columns perfectly solve the main task of quickly heating water, despite the lack of additional functions. Mora geysers have an internal structure consisting of the following components:

copper heat exchanger;
mechanical control unit
semi-automatic and automatic ignition unit draft and water pressure sensors (regulating and shut-off valves);
stainless steel burner
The shortest column service life is 10-12 years due to high-quality assembly.

With systematic maintenance, the service life can increase up to 15-20 years.

Installation of a geyser

The connection must be made by highly qualified specialists who have the appropriate work permit and license. After installing the boiler, they draw up an act, the form of which is in the technical passport of the unit, after which a stamp is placed on putting the column into operation. A coarse filter is mounted on the supply pipeline, sometimes a booster pump is connected at low pressure.

Comfort:

The VEGA 13E instantaneous water heater is equipped with a combined fitting from the German company Mertik, which ensures that the column is turned on already at a water flow of 3.25 l / min. Mertik fittings are also equipped with the function of automatically maintaining the set temperature, which is very important in case of water pressure fluctuations in the water supply system.

Economy:

In the category of geysers, VEGA 13E stands out for the highest efficiency in the world, which is almost 92%. Thanks to a small but highly efficient heat exchanger, VEGA 13E starts heating the flowing water 15% faster than any other column.

Reliability:

The reliability of the column is ensured thanks to a number of design solutions:

Unlike all other manufacturers that use similar fitting designs, the Mertik combination fittings used in these dispensers have a different design solution, due to which the moving parts do not work in a water environment, which prevents a common problem with all dispensers, namely the flow of water in a leaky the place of connection of water and gas fittings, requiring, as a result, the change of the entire assembly.

The tubes of the heat exchanger inside are equipped with special turbulators that prevent the deposition of scale on the inner walls of the heat exchanger and ensure rapid heating of water.

The heat exchanger is made of tubes with a diameter of 18 mm, which not only significantly prevents the precipitation of salts, but also effectively cools the walls of the heat exchanger without overheating the column casing.

Safety:

emergency thermostat that prevents overheating of water in the heat exchanger.

backdraft fuse of combustion products, which prevents the penetration of gases into the room in case of clogging of the chimney.

The ionization electrode ensures proper operation of the main and pilot burners.

the column will not allow the main burner to start in the absence of water.

Buy with this product

180 rub.

150 rub.

400 rubles

Questions and answers

Vadim Yurievich Zaruchevsky

there was a column niva 3208, it is necessary to change the gas workers said that there should be the same gas-consuming power of 2.37 m3 / h, which can be replaced, preferably also neva

Now NEVA-4511 has been standing since January 2011. It is already starting to leak. There were no complaints, the only thing that does not regulate the temperature during water pressure surges. And the size is just right. what to change?

Instead of the old Neva, a Bosch Therm 4000 O WR 13-2 B was installed. The Neva gave hot water even with a small opening of the hot water tap, Bosch ignites with a large opening. Will you have to pay more for water, or is the new column simply not set up?

Good day! How to make a hood for the Neva comfort column 13. Through the wall in a private house!

Hello, we installed the Mora Top Vega 13 E column. We read in the reviews that it works well for two points. We only pull one, when you turn on the second goes out. Don't tell us what to do? Can it be customized or buy a pump?

Hello. I live in a 5 story building. The water pressure is weak, then drops, then normal. The old column (Neva) smoked very strongly (I don’t know what to call it exactly), in general, all the walls turned yellow ... We plan to make repairs, change the finish and at the same time purchase a new column. We opted for Innovita Primo 11 i NG. Will she fit? How often should batteries be changed? We also considered Electrolux speakers (For example, electrolux gwh 10 nanoplus 2.0) Which one is better in this case?

ANSWER: Good afternoon! Electrolux are proven speakers, they have many service centers. Innovita speakers are not widely used, and therefore they have problems with service centers.

Worth Neva semi-automatic. It works, but what a pain to set it on fire. I want to buy an electrolux machine GWH 10. But I don’t know if the diameter of the chimney is suitable. But it’s impossible for the master to come and see if it’s suitable or not? I'm not an expert, how can I find out.

ANSWER: Good afternoon! Most likely it will fit, but you did not specify the diameter of the old chimney / column model. The master can come to you if you wish.

Vyacheslav

Good afternoon. The column Neva 4510, the diameter of the exhaust pipe is 120 mm, I want to change it to Ladogaz 11PL.s with a diameter of 110 mm. Do I need to install a sealant from an asbestos cord or can I leave the steel exhaust pipe like that.

ANSWER: Good afternoon! Seals are not required, natural gas rises from the pipe. The chimney will fit.

Good afternoon!
Tell me, please, how much will it cost TOTAL to buy this column, dismantle the old Neva 4513, as well as install and connect this one?
So that you can safely use it?

Also interested in how much this column is safer and more convenient to maintain in comparison with Neva 4513?

I think, take this one or just put the same Neva 4513?

Thank you.

ANSWER: Good afternoon!
Column Electrolux GWH 12 NanoPlus 2.0 - 10590 rubles.
Dismantling of the old column - 350 rubles.
Installation of a new column - 2500 rubles.
Additional materials are paid separately if needed.
In terms of safety, the new speakers are more modern than the old ones, so the safety class is higher.
4513 are out of production, and 4513M too.

Hello,
Is the Hyundai H-GW1-AMBL-UI 306 column suitable for low water pressure and does not need to be connected to electricity?

ANSWER: Good afternoon! For low pressure, it is better to take domestic speakers. It works on batteries.

Hello, please tell me, a column, with auto-ignition, for the home, for a long service life. Thank you.

ANSWER: Good afternoon! BaltGaz, Neva - 5 year warranty. Also good Electrolux speakers.

Konstantin

Hello, I want to change the gas water heater baltgaz 5514 to baltgaz comfort 17, I would like to clarify the attachment points are identical on these models? And comfort 17 is suitable if I have 3 hot water connection points? There are no problems with water pressure, but 5514 can not cope with water heating only a small trickle. Comfort 17 will solve this problem?

ANSWER: Good afternoon! Mounts are identical. It fits 3 points. If the pressure is good, then it will be enough. The column itself does not produce water - it only heats it. Therefore, if the water pressure at the opening of the water at all three draw-off points is good, then you can take it.

Hello!
There is a Vaillant mag pro column (mag oe 11-0 / 0 xzc + h), connected to a home gas pipeline, three points of consumption come from it - a sink in the kitchen, a sink in the bathroom and a shower / bathroom faucet directly.
The pressure of cold water in the apartment is good. When at least one of the points of consumption is turned on, when a minimum amount of cold water is added to the mixture, the temperature of the total flow drops sharply. That is, the column cannot provide the necessary pressure of warm water. Is it really so low-power or are there problems in connection (connected by the previous owner of the apartment)? If, nevertheless, there is not enough power, then what kind of Neva / Baltgaz would you recommend?

ANSWER: Good afternoon! Your column is not even designed for 2 points of consumption. The only option for 3 points is BaltGaz Comfort 17.

Good day! I choose between Ariston fast evo 11b and Electrolux GWH 11 nanopro 2.0, tell me which one is more reliable? Or can you recommend another one?

ANSWER: Good afternoon! The most reliable at the moment - BaltGaz with a 5-year warranty

Please specify the country of the manufacturer of the geyser Electrolux GWN 12 and 14 at present

ANSWER: Good afternoon! Factory located in China

What is hydro ignition. I want to take a Bosch WRD 13-2G speaker. Am I right.

ANSWER: Good afternoon!
With this system, ignition occurs automatically when the water is turned on, without batteries. But such a system is not very reliable, we recommend purchasing a column with automatic ignition from batteries

What is the warranty period and which components are covered? Do I need to do regular maintenance to keep the warranty?

ANSWER: Good afternoon!
Electrolux speakers are guaranteed for 2 years from the date of installation. To extend the warranty for a second year, it is necessary to carry out maintenance one year after installation - this is a requirement for all gas water heaters.

Hello! Electrolux failed at 14 liters. Worked for 15 years. What column would you recommend as a replacement? Extra "bells and whistles" are not needed. Chose between Electrolux and Bosch. Maybe something else needs to be considered? Thank you

ANSWER: Good afternoon! Electrolux is still a good option. There have been a lot of complaints about Bosch lately - immediately after the warranty period expires, the heat exchanger starts to flow. And as an alternative, you can consider Baltgaz / Neva - no one can compare with them in terms of warranty period

Good day! And who answers the questions? Manager or engineer? If the manager - no questions. If an engineer, then I have 2 questions.
1) in the passport for the gas column it says "capacity 6 l / min", what does this mean? That at any inlet pressure (volume of passing water) only 6 liters of water will pass through the water block or that the heating indicated in the documentation, for example, by 50 degrees, will be provided only to this volume (if it increases, the water heating will be less at a constant combustion power, if it decreases - heating more)?
2) In the series of gas columns Neva Transit (produced by "China"), the minimum is indicated. water pressure to start 0.02 bar. It's not a mistake? Maybe MPa, not bars? Why such a low value? For all manufacturers, this value is not less than 0.1-0.15 bar (=0.01-0.015 MPa=almost 0.1-0.15 atm).

ANSWER: Good afternoon!
1) This suggests that in a minute the column will release 6 liters of water heated 25 degrees higher than cold water at the outlet. If you want to heat water by 50 degrees, then the productivity will be 3 l / min, respectively.
2) Yes, a mistake. Minimum pressure 0.2 bar. Thanks for posting this, it's been corrected.

Hello!
Help, please, with the choice of a RELIABLE geyser for an apartment, so that it is enough for 2 points of consumption, taking into account the low pressure in the water supply (2-2.5 atm in the system with the taps turned off).

ANSWER: Good afternoon! Our speakers are best suited: BaltGaz Comfort 13 or 15, or Neva 5514. If you are interested in imported ones, then Electrolux 14.

I've heard a lot about mora top speakers being the best. Is it so? and which one would you recommend if not mora for 13 liters?

ANSWER: Good afternoon! Mora speakers are really good, but they have problems with the availability of components and their cost. In this regard, we recommend Neva / BaltGaz and Electrolux gas water heaters, which have no problems with this, and they are reliable - they have a guarantee of up to 5 years.

Konstantin

Hello! I have a great desire to buy a gas column Neva 4508 on liquefied gas, in connection with which where can I buy in Moscow?

ANSWER: Good afternoon! You can buy from us, for example))

Good afternoon. There is a gas column AEG 11 ERN. It suddenly broke down - when the water tap was turned on, it stopped giving a spark to the burner (the battery was changed). Is there a possibility of a fix? If not, which one should I change to Bosch 10 - 2V or Bosch 13 -2V at the lowest cost (chimney, etc.)? Thank you.

ANSWER: Good afternoon! AEG speakers have not been sold in Russia for a long time. And you won't find spare parts for it.
We advise you to change not to Bosch, but to a better speaker - for example, Electrolux. In terms of displacement, I think 12 liters will suit you.

Alexey Anatolievich Mikhailov

Good day!
I have an Electrolux GWH 265 ERN NanoPlus (5 years). I suspect a malfunction of the water unit (water oozes presumably from under the gaskets). Question - is it worth changing the entire column? And if it's worth what? The same for another five years - somehow does not warm the soul. Does it make sense to consider Bosch W 10 KB or Electrolux GWH 10 NanoPlus 2.0 as an alternative? Will they be more reliable? The house has problems with water pressure (extremely low, even suites work only with the maximum inverted water flow valve and are regulated only by gas) and there are no problems with gas and traction.

ANSWER: Good afternoon! Most likely, replacing the node will cost almost as much as a new column. Between Bosch and Electrolux choose Electrolux. Bosch 10 KB performed poorly, unlike Electrolux. The model you indicated is correct - Electrolux GWH 10 NanoPlus 2.0, with poor water pressure, it should work fine.

Good evening. Please tell me, what metal is the heat exchanger for electrolux gas water heaters?

ANSWER: Good evening! Electrolux, like many other manufacturers, has a copper heat exchanger

Vladimir Alekseevich

What is the difference between BaltGaz Comfort 13 - 15 columns and Neva 5514 structurally (heat exchanger, ignition, materials used, functionally, etc.)? Thank you.

ANSWER: Good afternoon! The Comfort Series speakers have a digital display showing water temperature and battery level. Otherwise, there are no differences

There are columns Geyser Vaillant MAG?
(it is written that it is out of production, but the price is worth it)

ANSWER: Good afternoon! The speakers are indeed discontinued, we no longer have any leftovers.

Hello.
We bought and connected a Bosch Therm 4000 O WR 13-2 G column. A day later, we noticed that hot water drips from the inside of the heat exchanger about once every 1-3 minutes. Sometimes a hissing sound is heard, as if a drop of water is dripping onto a hot surface, possibly a burner. Water drips only when the column is running. When off, water does not flow, although the column remains under water pressure (the valve is closed at the outlet).
Does this mean that the heat exchanger is faulty? Do I need to do something in such a situation, or can it go away on its own with time?

ANSWER: Good afternoon! Most likely condensation is falling, there is nothing to worry about.

What do you recommend to buy. Geyser ... innovita 14i or Baltgaz comfort? What is more reliable? Yuri

ANSWER: Good afternoon! We would recommend Baltgaz Comfort. They have a 5-year warranty, all components are Russian, of good quality. Baltgaz also makes it easier and cheaper to find components in the event of a post-warranty repair.

Hello, we settled on the choice in favor of this product Bosch WR 13-2 B geyser with auto-ignition, but the question remains: "Is it possible to regulate the water temperature not on the column itself, but by opening an additional tap with cold water?" Thanks in advance for your reply

ANSWER: Good afternoon! You can do this, but it is not desirable - the column in this case will serve you less.

Who is the manufacturer

ANSWER: Hello, the manufacturing country of all Bosch speakers is Portugal.

how much does it cost to install a geyser Bosch WRD 13-2?

ANSWER: Hello, usually the installation of a geyser costs 2500 rubles. Materials are paid separately. For details, it is better to check with the manager or installer by phone on the site.

TAMARA Konstantinovna

Hello! Hanging Neva 3208. I want to install Bosch WR13-2P. How much will a replacement cost? Thank you.

ANSWER: Hello, usually the installation of a gas column costs 2500 rubles, the dismantling of the old one costs 350 rubles. Materials are paid separately. For details, it is better to check with the manager or installer by phone on the site.

Thanks, I got an answer to my question.
I have another question. Is it possible to replace the Neva Lux 5013 column with a Bosch Therm 4000 O WR 13-2 B gas water heater and how much will it cost. Thank you.

ANSWER: Good afternoon! Of course you can. Dismantling the old column costs 350 rubles, installing a new one - 2500.

there is a gas column Neva Lux 5013 (5025), which column can be replaced with the lowest labor and material costs

ANSWER: Good afternoon! Consider 5514.

2017-03-09 Evgeny Fomenko

Consider the characteristic breakdowns of Mora's gas column and the necessary do-it-yourself repairs. Before starting troubleshooting, close the valve on the pipe through which gas is introduced into the water heater. Even if a part that is not connected to the gas is broken, there is a chance of catching it.

Scale buildup in the heat exchanger

Mora heat exchangers are made of high-quality copper, 1 mm thick. Inside the tubes, the water heats up and scale accumulates on their walls. This leads to an increase in heating time and a decrease in pressure. The main sign of clogging of the heat exchanger pipes will be that the water from the tap flows actively, and the pressure through the column is weaker.

To clean the scale with your own hands, you should remove the casing from the water heater, drain the water and unscrew the union nuts from the heat exchanger outlets. After that, a special liquid for dissolving salts, which is sold in a hardware store, is poured into the tubes using a hose. Instead, you can use a solution with citric acid or vinegar. It is necessary to wait several hours for complete cleaning.

For prevention, the heating temperature should be set no more than 50 degrees. If the temperature is higher, the scale settles especially actively.

Radiator contamination

The radiator consists of metal plates, between which there is a small distance. Since they are affected by the flame from the burner, soot accumulates between them over time.

Geyser radiator

It can be seen from the yellow color of the fire. The flame can be directed not in the upward direction, but to the side, thereby heating the casing. The water heats up longer even when the column is running at full power and black soot pours out from under the device.

For repair, remove the column shell, disconnect the heat exchanger pipes and completely dismantle it, covering the burner with a rag beforehand so that it does not become clogged. It is most convenient to clean the radiator in the bathroom under running water. If necessary, it is left to sour in a container with chemicals. At the end, it is cleaned with a soft long-haired brush, dried and installed back.

Fistulas in the heat exchanger

One of the most common breakdowns of Mohr columns is the appearance of micro-holes on the heat exchanger tubes. To detect them, you need to carefully examine it with the tap turned off (at the same time, the maximum pressure inside is reached). Part of the leaks will be visible by drops of water, the smallest fistulas can be seen by green or rusty stains.

Before starting repair work, the water is drained. You can fix the breakdown in the following ways:

At the end, the water heater is filled with liquid, and the places of former leaks are carefully examined. You need to check first with cold, and then with the gas turned on with hot water.

Membrane replacement

If the gas does not turn on or the burner flame is very weak, the membrane in the water assembly may be stretched or damaged. Water may also start to flow from the water block. In the Mora water heater, the water unit is located horizontally.

To get to the rubber membrane, the union nuts for the supply and output of water from below are first unscrewed. Then the heat exchanger tube going to the rear wall is unscrewed. With a screwdriver under the asterisk, four bolts are unscrewed, the cover of the water block is removed. Three springs are removed and a new membrane is installed.

It is important to buy a membrane designed specifically for your model, as there are now many configurations. After replacement, all nodes are assembled in the reverse order, the operation of the device is tested.

Replacing the membrane in the geyser

Preventive maintenance work

For correct operation, the Mora water heater needs regular maintenance:

Batteries need to be replaced from time to time. If they sit down, then the spark continues to be produced, but its power is not enough. The standard size of the R20 nutritional cells is 1.5 volts. The container with them is located at the bottom of the device.
If you have hard and dirty water, you should clean and change the mesh filters on time. They are installed on the cold water inlet pipe. If this is not done, over time it will lead to a decrease in pressure.
Clogged igniter. In semi-automatic models with a wick, the jet becomes clogged with dust over time. You can clean it with a thin soft wire.

If, after the diagnosis, you could not find the cause of the malfunction, call the experts.

In conclusion, we offer a video on repairing Mora's geyser igniter: