Geysers manufacturer mora tora. Gas instantaneous water heaters

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.

To 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:

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 user complaints 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 package 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 provide fast water heating.
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 heat exchanger walls without overheating the column casing.

Security

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)

The Czech company Mora Top has been present on the market of geysers for many decades. All this time, she tries to produce flawless products that meet all the needs of consumers. At the same time, the company does not lag behind the requirements of technological progress. Consider the most popular models of geysers of this brand, their features, and also give valuable advice on operation.

Vega Max

This modification is designed to replace the models 5502, 5505, 370, 371. All four versions have been discontinued several years ago, but instead of them, as the previously installed equipment wears out, a new column can be installed without changing the connecting dimensions. Thanks to this, updating water heaters will be easy and simple. The geyser is mounted on the wall, capable of developing a thermal power of 17.3 kW, providing up to 10 liters of heated water in 60 seconds. The design of this model includes:

German fittings for water and gas Mertik;
main and pilot burners, Czech-made heat exchanger;
pipes with a wall of 0.1 cm.

The system automatically maintains the set liquid temperature. There are two options - with piezoelectric ignition and battery-powered. Installed all the necessary range of security devices.

The transfer of the gas valve to the open position is excluded when the water supply is turned off. Gaseous products will definitely not get outside.

Model Vega 10

This is another promising model from the Czech company. Its characteristic advantages are, in addition to the brilliant design, compact dimensions and technological excellence. The thermal generation rating is 17.3 kW, and the spread in the amount of water received (when heated to 25 degrees) is from 5 to 10 liters. The device is able to operate in an automated mode and consume 10% less gas than other products of comparable power. Positive feedback from customers causes efficiency up to 92%, as well as smooth power control.

Combined fittings from Germany are able to turn on the column even with a pressure of 2.5 liters in 1 minute. Other constructions of the same kind do not provide this possibility. Importantly, the German developers have taken care to maintain a strictly set temperature. This allows you to extinguish the negative effect associated with pressure surges. The rejection of moving parts in water prevents the disadvantage of most dispensers - a high risk of leakage at the intersection of water and gas fittings.

Vega 10E

This model is equipped with a 1.5V battery operated ignition. 2 batteries must be used for normal operation. Like other versions in the Vega line, the design attracts attention with its external performance and at the same time technical leadership. A safety thermostat is provided to prevent overheating of the liquid inside the heat exchanger. Automation will block the operation of the main burner if there is no water, a high-quality ionization electrode is installed.

Vega 16

Such a gas water heater is far superior to all the versions listed above. It develops a thermal power of up to 26.4 kW, while the minute flow rate of warm water ranges from 8 to 15.2 liters. The operation of the device involves the consumption of natural gas. The special design of the fittings ensures that the column starts already when 4 liters of water per minute enter. The rate of heating due to the improved heat exchanger is increased by 15% compared to similar designs.

Additional turbulators slow down the deposition of scale particles many times over and accelerate the heating of the liquid. The carefully selected diameter of the heat exchanger tubes allows for a balance between slow accumulation of salts and efficient cooling of the walls. This cooling occurs without simultaneous overheating of the case and casing. The design includes protection against infiltration of flue gases into the room. There is also a fire fuse that stabilizes the operation of the main burner and igniter.

Possible problems

No matter how well Czech and German developers treat their duties, gas water heaters can still give various failures. Malfunctions in the water and gas blocks may be associated with mechanical defects in the water heaters themselves or with deformation of the supply cables. Also, as with other columns, problems are often created:

blockages of heat exchangers;
scale deposits on pipes;
weak liquid pressure.

At the input to the column there is a filter in the form of a grid. It is designed to trap small debris moving with a stream of water. But since the mesh itself is inevitably clogged with this dirt, it needs to be cleaned periodically. When the column does not ignite or goes out too quickly after the start of work, the cause of this development is almost certainly related to the wear of the membrane. An element that is continuously stretched under pressure eventually fails, becomes stretched beyond measure, or even breaks.

If, during ignition, cotton is heard and the wick immediately goes out, there is contamination of the fuse. They clean it by removing the casing and unscrewing the tubes of the thrust indicator, the gas supply channel. In addition to the fuse itself, it is better to immediately free the wick and nozzles from dirt. In a situation where these measures do not work, you will have to change the solenoid valve. If there is a spark that does not ignite the burner, it is required to examine and tighten the wiring of the ionization controller, and clean its contacts.

How to deal with other problems

It is often possible to hear that the geyser does not heat the water well. The main reason is a malfunction of the heat exchanger, clogged with soot and soot. An accurate diagnosis can be made by the color of the fire - in the case of a real blockage, it turns yellow and may even deviate to the side. This condition threatens to seriously overheat the casing and requires immediate cleaning.

To reduce the risk of scale formation, it is necessary not to bring the heating of the water up to 55 degrees unnecessarily and to install protective filters. If clogging nevertheless occurred, it is necessary to close the gas pipeline and the water circuit. Draining the liquid remaining in the radiator, remove the casing and open the way to the main plates. If necessary, they are not only cleaned with a brush, but problematic parts are also removed and washed.

Water leakage does not appear suddenly, because the corrosion process develops gradually. Small holes can be seen by spots on the surface of the heat exchanger. It is best to inspect the structure after the valve is closed, then the pressure will be higher and the problem will become clearer. Instead of soldering the radiator, you can use a rubber pad or cold welding.

In the latter case, it will still be necessary to select a material whose melting point is higher than the expected heating during operation.

Connecting a system that has been in cold conditions for a long time can be done after at least 2 hours in a warm room. You can not use a geyser located closer than 0.1 m from walls and any other objects. At least 0.4 m should remain above it. If a thermostat is mounted, it must be selected with an output without electric potential, since any discharge threatens to explode.

accumulation of explosive and flammable substances nearby;
connection of equipment without the involvement of specialists;
operation of a water heater, at the water inlet of which there is no strainer;
inclusion of hot and cold water at the same time when the column is on;
the use of acids for cleaning the heat exchanger and other parts of the water heater, even their weak solutions.

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.