Gas boiler regulation lemax

Gas boilers Lemax are a serious competitor to European counterparts.

They are assembled from spare parts manufactured by recognized leaders in the production of heating equipment - Vaillant, Sit and other well-known manufacturers.

With excellent quality, the cost of Lemax boilers is two or more times lower than that of the "Europeans".

Basically, this is achieved by excluding all additional devices and assemblies from the design, leaving only the most necessary elements.

This has a positive effect on the performance of the units, reduces the frequency of breakdowns or failures, but some malfunctions do occur.

The main malfunctions of gas boilers Lemax

The most common malfunctions include:

Leak of gas. Open windows immediately, shut off the gas supply, turn off the boiler and call the gas service workers.
The color of the flame is reddish, the tongues are elongated and smoky. Poor draft or burner clogging. Clean the chimney and burner, correct the position of the pipe.
Spontaneous shutdown of the main burner. Chimney or thermostat problems.
There is no water circulation. If there is a pump, the reason lies in it. If natural circulation is used, it is necessary to correct the configuration of the pipelines, giving them the correct slope.
Shutdown of the boiler. Usually occurs due to a gas supply cutoff.

The list of possible malfunctions can be continued for a long time, but there is no point in this, since each situation requires separate consideration.

How the Lemax boiler works and how it works

Lemax's enterprises are located in the Russian city of Taganrog. The supply of the main components for the boiler equipment assembled at our own facilities is carried out by both Western and domestic partners. The manufacture of the heat exchanger and the housing is mainly carried out by Russian enterprises, but the control units, automation and burners come from abroad.

Boilers of this type can be equipped with both open and closed combustion chambers. There are always pressure and temperature regulators on the casing of the units. As a rule, you can turn on the Lemax boiler not only from the network: some models do not depend on electrical energy at all. As stated by the safety precautions, the Lemax device must always be connected to the chimney. Only rooms with good ventilation are suitable for installing the equipment.

The characteristic features of the Taganrog devices are the simplicity of the procedure, how to light the Lemax boiler. Regardless of how many circuits this equipment serves, and what kind of material was used for its manufacture, switching it to the mains usually does not cause any particular difficulties. A prerequisite is the use of a voltage stabilizer in the circuit, how to turn on the Lemax gas boiler (any jump can provoke a breakdown of the device).

Lemax boiler consists of the following components:

Gas burner.
Valve.
Control boards.
Expansion tank.
Circulation pump.

Equipment of this type operates mainly on gas, where, due to the operating burner, the heat exchanger is heated. The structure also includes a coil for hot water supply. For the circulation of the coolant in the circuit, both natural and forced methods can be used.

Why does the device go out?

There can be several reasons for burner fading.:

Gas cut off. Switch off the boiler, wait for the supply to resume.
Unstable or absent voltage in the power supply network (for volatile boilers Lemax).
Failure or actuation of the draft sensor. It is necessary to check if it is there, if the chimney is not clogged. Sometimes cleaning the sensor contacts helps.
The thermocouple contacts are oxidized and do not close. Should be cleaned with fine-grained emery paper.
Reverse, insufficient or excessive thrust. The draft sensor reacts to all situations by switching off the burner.

Traction problems are most common in non-volatile installations, where the stability of the unit depends on it.

If the draft is too weak, the sensor turns off the burner due to the possibility of smoke in the room.

Excessive draft is dangerous due to the possibility of flame blowout on the burner, which will provoke gas supply into the room with unpredictable consequences. Therefore, an increase in draft against the set value is also an emergency case, leading to a stoppage of the boiler.

The most common malfunctions of automation and methods of their elimination

Before setting up the automation on the boiler, it is necessary to diagnose it. As a rule, serious malfunctions occur that require specialist intervention. The adjustment can also be entrusted to the gas master. Or you can make it yourself by reading the instruction manual.

Attention! The safety sensors must be checked before each seasonal operation.

Most often, the filter becomes clogged, problems arise with the valves, sensors burn out due to voltage surges, and a gas leak is detected. The correct cleaning of the filter must be done by a master. You can try to replace electronic elements yourself, having carefully studied the operating instructions for your boiler.

In order to replace the temperature sensor, it is necessary to turn off the gas boiler and cool the water to a temperature of 40 degrees. Shut off the coolant flow, remove the control knob by unscrewing the screw. Next, dismantle the PTV adjustment screw. Remove sensor bellows with support washer. Unscrew the union nut of the sensor bulb. Install the thermal bulb of the serviceable sensor into the boiler jacket and screw it tight. Install the sensor bellows into the pipe socket, install the support washer on the bellows, install the PTB adjustment screw and adjust the temperature.

If there are problems with ignition of the igniter, then one of its possible causes is a malfunction of the draft sensor. In this case, it must be dismantled, diagnosed, verified contacts, cleaned, and, if necessary, replaced with a new one.

Also, common reasons why the igniter does not ignite can be:

malfunction of the gas valve;
clogging of the hole in the igniter nozzle (it is possible to clean it with a wire);
strong air draft;
low gas inlet pressure.

When the gas supply is turned off, it is necessary to check the chimney (it may be clogged), the electromagnet, the gas pressure at the inlet to the gas boiler.

Attention! It is necessary to invite a specialist to diagnose and repair the automation of a gas boiler. Inappropriate actions can exacerbate the problem and have undesirable consequences.

For automation systems AGUK, AGU-T-M, AGU-P, the most common problem is the burnout of the bimetallic plate, which is used as a sensitive element.

In "Arbat" and "Orion" only the thermocouple and the thrust sensor, as well as the solenoid valve (rarely) can be replaced. The automation unit is practically beyond repair. In "Arbat" the system shutdown button often breaks.

How to turn on (light up)

The Lemax boiler is started up after filling the system with the required volume of water (12-14 liters for each kW of power) and connecting the gas pipeline.

Procedure:

Open the lid, providing yourself with access to the regulator and the piezo ignition button.
Turn the regulator counterclockwise, which will move the boiler to the “on” position.
Sink the regulator all the way down and hold it in this position while pressing the piezo ignition button.
After the flame appears on the pilot burner, the button can be released, but the regulator must be held for another minute.

IMPORTANT!

If the attempt to ignite the boiler was unsuccessful, it can be repeated only after 1 minute, not earlier.

Shutdown rules

The shutdown procedure is individual for each brand of boiler unit, but in general it has common stages. The manufacturability of the process of stopping the unit depends on the goals and design - single-circuit or double-circuit devices. The shutdown of the double-circuit boiler for the summer period will be partial, that is, the heating equipment will be turned off, and the DHW load will continue to function.

General steps for shutting down the unit:

Turn off the gas valve. There are 2 options - only for the main burner or together for the main burner and igniter.
In the first case, the knob is turned clockwise and set to the "ignition" position, while the main device will be turned off, but the pilot will continue to function.
In the second case, the knob is turned clockwise to the “off” position, which will shut off the gas to all burners.
You can turn off auxiliary equipment fans, smoke exhausters 15-20 minutes after the gas is shut off.
The circulation pump is stopped after the heating water has cooled to room temperature.
Turn off the power to the device.
The unit is preserved according to the manufacturer's instructions.
The shutdown of the double-circuit unit in the summer takes place in a slightly different procedure.
First, the heating line is closed with a three-way valve, in this case the coolant from the heating system enters the secondary DHW boiler.

Turning off the gas boiler begins with turning off the gas valve

Does not start (lights up)

The unit is fired up according to a certain scheme. It does not always start the first time, and this is quite normal. But, if after repeated attempts the boiler does not ignite, it is necessary to check the condition of the nodes responsible for ignition.

Possible reasons could be:

Failure of the electronic or mechanical ignition system. It is necessary to replace the system, or clean the thermocouple contacts.
The voltage in the power supply network has disappeared (for volatile units).
The valve on the gas supply pipe is closed.
The gas pressure in the system does not correspond to the nominal values.
Main burner nozzles clogged. It is necessary to clean them and start the boiler.

All of these reasons are the most common, but far from the only possible ones. Any malfunction in the system can adversely affect the ignition of the boiler..

NOTE!

If you have tried all the options, but the problem is not resolved, you need to call the wizard from the service organization.

Why is the pressure growing

Pressure build-up is a serious and dangerous situation. An increase in pressure in the system can only mean an increase in the amount of water.

This is due to the expansion of the coolant during heating. Any liquid is incompressible, so an increase in its volume can lead to rupture of the heat exchanger, or, in the most serious case, provoke an explosion.

To exclude such a possibility, an expansion tank is used in the design of boilers. It takes in excess water, compensating for its increase when heated.

An increase in pressure most often indicates a malfunction in the condition of the expansion tank. Its design consists of a container and an elastic membrane installed approximately in the middle.

When liquid begins to arrive, the membrane flexes and makes room for excess water..

When the volume decreases, it returns to its previous position. If the membrane is torn or not firmly attached to the expansion tank stacks, the coolant will fill the entire volume of the tank.

When expanding, the water will have nowhere to go, which will provoke a constant increase in pressure. The solution to the problem is to restore the condition of the membrane or replace the expansion tank with another, serviceable copy.

What causes the pressure to drop

A drop in pressure (the boiler goes out) indicates leaks. It is necessary to check the condition of pipelines, threaded connections, gaskets and other external elements of the heating system... If there is no visible damage, you should look for faults in the boiler.

The main problematic element can be the heat exchanger. Welded joints sometimes crack or break due to frequent temperature changes. Cast iron sectional heat exchangers used on heavy-duty floor-standing models are risk factors at section connections.

In addition, the pressure relief valve may be triggered or stuck open..

Threaded connections of branch pipes can also lose their tightness due to drying out or destruction of gaskets, connection not by thread, etc. All detected problems are eliminated in accordance with their specifics.

Room thermostat connection

A room thermostat is a convenient and useful device that allows you to regulate the temperature of the air, not the coolant in the heating system. The default sensor monitors the outlet temperature of the extract air.

This does not give a correct picture of the state of the indoor microclimate. For example, when the outside temperature rises, the room gets hot.

But the sensor cannot track this, and the extract air temperature is within the limits set by the mode, therefore, from the point of view of the system, everything is going well, in accordance with the boiler settings.

If a room thermostat is used, the burner will shut off much earlier, which will improve the room climate and significantly reduce gas consumption.

To connect a room thermostat, set the boiler's own element to the maximum temperature.

It will only work as a limiter when overheating.... The external unit is connected at one end to the automation unit, and at the other end to the boiler thermostat. By default, a jumper is installed between the contacts, which must be removed and the thermostat connected.

IMPORTANT!

Appropriate grades must be used, eg CEWAL RQ10. Installation of a thermostat is only possible on boilers marked with N (with SIT 820 NOVA control unit).

Lemax products

Currently, the company is ready to offer several models of gas equipment, which include:

Gas floor boilers Lemax single-circuit type.
Double-circuit units.
Water heating columns.

A large number of manufacturers offer their models, while providing complete and reliable information about them. There are not only high technical and operational characteristics, but also ease of use, ease of maintenance, great appearance, a modern approach to the inclusion of additional functions. So modern boilers running on natural gas are high-tech equipment that can provide heating to any building. In this regard, lemax gas boilers are not inferior to their competitors - neither domestic nor foreign.

Attention! CCI Lemax in the production of gas boilers uses Italian and German technologies, which are considered the most advanced throughout the world. Hence the high quality of the products.

What does Lemax offer today from boilers for heating? Basically, these are two types that differ from each other in the heat exchanger:

With steel heat exchanger.
With cast iron.

The company produces three series of boilers - premium, premium Nova and leader.

Gas boilers of the Premium series

Such units are made of steel sheet with a thickness of 2 millimeters. The heat exchanger of this boiler series is coated with special compounds that prevent corrosion. These are not only common inhibiting compounds, but also the surface layer of heat-insulating enamels. Such protection increases the service life not only of the heat exchanger, but also of the heating boiler as a whole.

If we talk about the device itself, then it works offline. For its operation, neither electrical nor any other energy is required. Lemax offers a lineup, which is divided by the power of the unit. In this case, the minimum power is 10 kilowatts, and the maximum is 40.

The manufacturer is constantly improving the design of the gas boiler. For example, today the Premium series has been supplemented with such options as overheating protection, reducing the formation of soot, there is no negative moment associated with the interruption of traction. The company's specialists have ensured that there is no process of blowing out the burner flame in the boilers. All this together ensured the high popularity of the Premium series boilers.

In addition, this type of heating unit is safe, reliable, convenient and simple enough. The manufacturing company gives a 3-year warranty for the quality operation of this model.

Boilers of the Premium Nova series

This is practically the same Premium series, but with an improved automation system. That is why this model is volatile. But if we consider it from the point of view of ease of use, then it clearly wins.

For example, you can set the boiler operating mode according to the parameters you need, and the temperature of the coolant will depend on the temperature inside the room. The same applies to the pressure within the system. Automation itself regulates, controls and sets the parameters that you manually set. And this is not only a big plus, it is also convenience.

Leader Series

This type of Lemax boilers is the most expensive, but also the most modern. It is made of gray cast iron, characterized by quality, durability and reliability. The thickness of the sheets used in production is 4 millimeters. All internal surfaces of the unit, including the heat exchanger, are treated with inhibitor solutions that prevent corrosion. That is why such boilers have been operating for at least 25 years. And their warranty period is 3 years.

Today the company offers both stand-alone and volatile units. In any case, you get a high-class boiler at a fairly reasonable price. And automation only adds to the reliability. If we talk about power, then the range is wide enough - from 16 to 50 kilowatts. By the way, such boilers heat rooms with an area of at least 500 square meters.