The modulating gas valve of the boiler is adjustable. Setting, adjusting the power of a gas boiler

Principle of operation gas boiler is based on heating the circulating fluid passing through the heat exchanger. Heat is generated in the combustion chamber as a result of work gas burner heating device. It is from the quality setting, and then the operation of the burner, that the productive capacity of the boiler, its efficiency depends. Consider the main aspects of choosing and setting up a gas boiler burner in more detail.

How to choose?

What you need to pay attention to when choosing a burner device for the boiler:

- productive capacity
- noise level during operation (applies to supercharged models)
- type of heating equipment for which the burner is purchased
- type of fuel
- pros and cons this device
- to foresee possible failures in the operation of the local gas supply line.

Considering these factors, it is possible to choose the most suitable burner for the boiler so that it works as efficiently as possible without burdening with frequent preventive maintenance.

Heating equipment combustion chamber

Gas boilers differ primarily in the design of the combustion chamber. It is of two types:

• open;
• closed.

open The chamber is a fairly simple combustion device. It looks like this: above the burner there is a heat exchanger in the form of a coil of thin copper tubes. Thanks to open design the air necessary for the combustion reaction enters the place of ignition of the gas from the environment.

As a rule, there is enough air from the room (provided that good ventilation is organized). But there is wall models with air intake from the outside, for which a special hole is mounted in the wall. Open combustion chambers require a chimney.

It is most often installed for models of floor gas boilers, and was also used to complete an old-style boiler (in this case, the ignition was performed by an ignition burner).

Schemes of the device of the combustion chamber

Closed the combustion chamber differs in the design of the heating block. The heat exchanger is located above the burner. The body of the block is closed, the combustion air is blown by a fan installed in the chamber. A coolant is passed through the double walls of the chamber, heating it, increasing the efficiency of the boiler. The gas is burned almost completely, the combustion products are discharged by a coaxial pipe under air pressure.

Types of burners

According to their design, functional differences, burners are divided into:

By appointment:

• for high power industrial equipment
• for household equipment.

By type of fuel used:

• devices for natural gas;
• devices for liquefied gas;
• universal devices.

By adjusting the flame:

• single-stage - able to work on / off;
• two-stage (as a variety - models with smooth modulation) - operate at full power, when the desired temperature is reached, the flame is reduced by half;
• modulating - boilers with a modulating burner are distinguished by a smooth adjustment of the flame strength.

According to the principle of work:

Boiler gas burner device

Atmospheric and fan burners differ in their structure. This is due in a different way supply of oxygen to the chamber during fuel combustion.

Atmospheric burner device.

Air enters the combustion chamber directly from the room. Nozzles are located inside the burner channel. Gas is fed into the nozzles, mixing with air, which also has access here. At a short distance from the nozzles, there are outlet slots through which the finished fuel mixture is supplied. An area is created between nozzles and outlets reduced pressure, which contributes to the constant injection of air for mixing.

The ignition burner is constantly working in the combustion chamber to ignite the main device.

Fan burner device.

The device block consists of:

1. engine;
2. fan;
3. automatic control unit;
4. reducer;
5. air pressure switch;
6. fuel mass mixer.

Air is forced from the outside by a fan, fed into the combustion chamber to form a fuel substance. The ratio of air and gas can be adjusted with a damper and a fan.

burner flame

One of the indicators of the correct operation of the burner is the color of the flame. For gas equipment characterized by an even bluish flame without impurities of other colors. The presence of inclusions of yellow, red indicates that the burner is not working well, this reduces the efficiency of heating equipment.

First of all, this applies to injection burners, but sometimes it is also typical for fan burners. The flame simply lacks oxygen. Also, along with the air, dust and other small debris can get in, which will clog the device, reducing the efficiency of the boiler. All this directly affects the flame. If it hums, the burner is loud, the fire has changed color - you need to adjust correct work devices.

When is a burner flame adjustment required?

Atmospheric gas burner for heating equipment often fails. It is equipped with models of both wall-mounted and floor-standing boilers. The injection burner of outdoor equipment reduces its efficiency for various reasons:

• Burner power too high. It happens when a high-power burner is purchased for small heating equipment. At the same time, there is not enough space for combustion, the air flow for such a power is weak, which leads to the transition of the flame from blue to yellow, sooting of the combustion chamber, chimney.
• If the chimney is poorly cleaned, the draft of the boiler deteriorates. At the same time, the spent combustion products are poorly removed, the air flow is small. This worsens combustion, the flame turns yellow.
• The defect of the burner itself does not make it possible to properly adjust the complete combustion of the fuel.
• Due to pressure fluctuations in the gas supply system, well-regulated equipment can emit large amounts of unused gas into the chimney. Partially, it settles with soot, soot. A large layer of soot reduces traction, increases fuel consumption.
• launch heating equipment after repair.
• The presence of extraneous noise during the operation of the boiler, gas burner.
• Change of type of fuel.

Hardware setup

Floor-standing gas boilers with an atmospheric burner can be configured independently. Pressurized systems are regulated by an automatic control unit and do not require additional settings.

Scheme of actions when setting up single-stage equipment:

1. Install the device on the boiler.
2. Connect to the gas pipe.
3. Check for absolute tightness.
4. Remove the burner housing.
5. Using a manometer, measure the gas pressure at the inlet.
6. Connect to electricity. Make sure that the jumpers, phases are connected correctly.
7. Install a gas analyzer in the chimney.
8. Start device.
9. Use a manometer to read the pressure at the outlet of the burner block. The pressure readings must correspond to the parameters indicated in the data sheet.
10. Adjust the air flow with an air damper.
11. The readings of the gas analyzer must also comply with all standards for the installation of gas equipment.

Setting up gas equipment should be carried out by specialists. Most simple boilers open type it is possible to configure it yourself if you have certain skills, knowledge of the burner block device. The efficiency of the boiler, its level of efficiency, fuel consumption depend on the quality of the burner. It is superficially possible to determine that the equipment is malfunctioning by the changed burner flame.

If earlier the adjustment of the boiler was simple - turned the valve on the burner and increased or decreased the gas pressure, then modern automation does everything by itself. But even in it, malfunctions occur that require adjustment of the operation of automation. Consider how a modern gas boiler functions.

Description and functions of the gas boiler

A simple heater consists of a heat exchange chamber, a gas burner and ventilation. The operation of all these systems is controlled by automation.

The gas boiler safety device has a multi-stage protection system:

1. During ignition, it is necessary not only to turn the gas supply knob, but also to hold it for some time until the solenoid valve (6) operates. This prevents accidental gas leakage in the device.
2. The backdraft sensor (8) reacts to the flow of fire from the burner into the room. This can occur with sudden gusts of wind, a clogged chimney and malfunctioning burners. Thanks to this controller, the gas supply is automatically turned off when a reverse draft occurs and people cannot be poisoned by carbon monoxide.
3. The temperature sensor (7) protects the boiler from overheating, turning on the gas as needed. Thanks to him, the temperature in the heating system is maintained at the mark that is set by the user.

Control systems in gas boilers are autonomous or energized. The second require connection to the electrical network.

Gas boiler adjustment

If the automation began to work incorrectly, there were malfunctions in its functioning, then you need to find the cause and either adjust the control system, or replace the faulty elements.

IMPORTANT! Do not leave faults unattended, even if they occur only occasionally. It could cost your life and your loved ones.

Consider the most popular problems that you can fix yourself:

• “The boiler warmed wonderfully in autumn, but it was cold in the house in winter.” This, in fact, is not a breakdown, but only the need to regulate the heating temperature. In the body of any gas boiler there is a thermostat. It may look like a rotary knob with a scale, buttons with a temperature screen, a scale with a slider on it. Enough to install greater value heating, as the house will immediately become warmer.
• "Does not work when ignited solenoid valve no matter how hard you push the handle. The most common failure requiring valve replacement.
• “The boiler burns normally, but after a while there is a bang and everything turns off.” As a rule, here we are dealing with the operation of automation. But what is the reason for the “cotton” will have to be clarified. It is best to invite experts.

IMPORTANT! Do not glue a defective EM valve or jam it! He is responsible for the gas supply, and if you fix it, the rest of the automation will be useless. When the burner goes out or reverse thrust You run the risk of simply suffocating.

Conclusion

In conclusion, it should be recalled that all gas equipment is a source of increased danger. You should not unwind anything in the boiler control system yourself, interfere with the operation of controllers, burners and sensors. The gas is invisible and imperceptible, and its leak is much more difficult to detect than faulty wiring or leaking water pipes. If you need to install, replace, repair or adjust a gas boiler, it is better to invite specialists.

For heating houses, gas boilers are often used - convenient and fairly economical appliances that run on blue fuel. The correct functioning of these devices is ensured by a number of devices that monitor the operating mode.

Timely adjustment of the automation of a gas boiler allows you to increase the efficiency of the heating device, as well as ensure reliability and safety in operation. And this, you see, is quite important point for all users.

But how to make adjustments and is it possible to do it on your own? Let's try to figure out these questions together. Why consider in detail the device and the principle of operation of automation using the example of one of the most popular models.

We will also pay attention to the issues of setting up the equipment and the main problems that the user may encounter in the process of setting up and further operating the gas boiler.

This definition means a system of executive and control devices aimed at maintaining the specified modes, as well as prompt response to emergency situations that have arisen.

This ensures the safe use of boilers with minimal human involvement in the processes occurring in the device.

The design of gas boilers includes a variety of types of automatic devices (electronic and mechanical), which are designed to maintain efficient safe operation.

All automation used for correct functioning heating appliances can be divided into two main groups:

• autonomous, not dependent on external power supply;
• devices that require an external source of electrical current.

Let's consider each group of devices in detail.

How do volatile devices work?

Such systems are complex electronic components that require electricity to operate.

At the same time, these devices allow you to regulate the supply of fuel and the degree of heating by closing or opening a tap, which helps to save heating costs.

The safety valve regulates, distributes and shuts off the gas flow

The most widely used products are the Italian brand EuroSIT. The most popular model is Eurosit 630, which is characterized by lightweight functionality, compatibility with designs from various manufacturers, reliability and durability.

It is on the example of Eurosit 630 that we will consider in detail the device of the automatic block.

Conclusions and useful video on the topic

In the video below you will find brief instructions for the installation of a gas boiler equipped with automatic system Eurosit.

A modern gas boiler is enough complex structure which has many useful features. Automation of most models greatly facilitates their operation, takes over the management of mechanisms and control over their work.

This significantly increases the level of safety during the operation of the heating system, and also increases its efficiency by selecting the optimal mode.

Do you need to adjust the automation of your gas boiler? Do you want to solve this problem yourself and want to clarify some points? Feel free to ask your questions under this article, and our experts will try to help you.

Page 2- continuation. Start - on page 1

Read: Either cold or hot water comes from the boiler

Adjustment, adjustment of the SIT gas valve

SIT gas valve

SIT gas valve. 1 - measuring fitting of gas pressure at the outlet of the valve, in front of the burner; 2 - adjusting nut for maximum gas flow; 3 - adjusting screw for minimum gas flow; 4 - cover of the adjusting device; 5 - measuring fitting of gas pressure at the valve inlet, in gas network.

Manufacturers of double-circuit gas boilers of many trademarks installs a gas valve from the Italian company SIT on the boilers. The settings for the maximum and minimum power of the boiler burner are made by turning the adjusting screws located on the valve body.

The boiler manufacturer Protherm Gepard (Panther) installs the SIT 845 Sigma gas valve instead of the Honeywell gas valve on some versions of the boilers. Such a gas valve is also found in gas boilers of the Vaillant series.

There are no lines d.52 and d.53 in the service menu of Protherm boilers with SIT valve.

How to adjust the minimum and maximum gas pressure at the outlet of the gas valve, see the video below. The principle of setting does not change.

The normal dynamic gas pressure at the gas valve inlet should be between 1.3 - 2.5 kPa (13 - 25 mbar or 132 - 255 mm. water. Art.). If, during the measurement, the value dynamic pressure exceeds the specified limits, you must contact the gas service.

In order to prevent the boiler from cycling in heating mode, the minimum gas pressure at the valve outlet is reduced. To do this, turn the adjuster counterclockwise. screw.

From clocking to DHW mode are disposed of by reducing the maximum pressure. To do this, turn the adjusting knob counterclockwise. nut.

Setting, adjusting the power of a gas boiler when working on antifreeze

Traditional antifreezes based on ethylene glycol or propylene glycol have a higher viscosity than water. As a result, the movement of the coolant through the boiler heat exchanger slows down. In addition, antifreezes have a lower heat capacity. All this leads to the fact that the antifreeze in the boiler heat exchanger, which is designed for water, at maximum power instantly heats up to the boiling temperature and boils. Boiling of antifreeze, as a result of local overheating in the heat exchanger, manifests itself in the form of loud noise, a roar with gurgling.

When working on antifreeze, a gas boiler can only operate at a reduced power, lower than that indicated in the boiler instructions for water.

For some increase in the power of a boiler running on antifreeze, it is recommended to dilute the antifreeze with water, as well as increase the pressure circulation pump.

So, for example, the manufacturer of antifreeze "DIXIS TOP" for heating systems with wall-mounted gas boilers recommends diluting the contents of the factory packaging with water in a ratio of 1: 1. As a result of diluting antifreeze, the crystallization onset temperature will increase from -30 °C up to minus 10 °C.

If the crystallization temperature of the diluted antifreeze does not suit you, then another antifreeze is selected.

In any case, to avoid overheating of the heat exchanger, in the settings service menu and gas valve it is necessary to limit the boiler output in heating mode(in lines d.00 and d.52 of the service menu), as well as set the maximum coolant temperature not higher than +70 °C (in line d.71 of the service menu). It is also recommended to increase the opening pressure of the bypass valve on the boiler (how? - read below).

The manufacturer of the boilers in the instruction manual usually gives his recommendations on the choice of antifreeze. So, for Protherm gas boilers, the instructions say: “It is not recommended to use non-freezing liquids in heating systems with Protherm equipment installed. The use of antifreeze liquids entails a decrease in heat transfer efficiency, more high temperatures on the surface on the walls of the heat exchanger and its rapid wear, an increase in the corrosion effect and viscosity, corrosion of gaskets and fittings, both in the boiler itself and in the heating system. Boiler failure due to the use of non-freezing fluids will void the warranty.”

Setting, adjusting the bypass valve

In boilers, the direct and return heating pipelines are interconnected through a bypass valve - bypass, pos. one.

At a certain value of the pressure difference in the forward and return pipelines, the valve opens and part of the water flows from the direct pipeline to the return pipeline. As a result, the difference in water pressure in the forward and return pipelines cannot exceed the value set by the valve setting. The operation of the valve helps to avoid water hammer when the circulation pump is turned on. In addition, the valve setting limits the maximum flow rate (flow) of water in the heating circuit.

The value of the valve actuation pressure is determined by the position of the adjusting screw, pos.1 in the figure. The screw from one extreme position to another can be rotated 10 turns. factory setting- the screw is set to the middle position by turning 5 turns counterclockwise from the extreme right position. The valve opens at a pressure difference of 0.25 b ar.

If heating radiators are heated unevenly in height - the top is hot and the bottom is cold (the difference is more than 15-20 ° C), then it is necessary to increase the speed of water movement in the heating system. To do this, turn the bypass valve adjusting screw clockwise. Valve actuation pressure increases to 0.35 bar ar.

If noise is heard in the radiators or control valves during the operation of the circulation pump, the water flow rate in the heating circuit should be reduced. To do this, turn the screw counterclockwise. Valve actuation pressure is reduced to 0.17 psi ar.

The difference in pressure values, which are displayed on the boiler display, during the operation of the circulation pump and immediately after it stops, should not be more than 0.2-0.4 bar. If more, then it is necessary to drain the water from the boiler, unscrew and check the cleanliness of the bypass valve.

Three-way valve for gas boiler

Three-way valve of the gas boiler in heating mode. In DHW mode, the stem with the valve moves up.

To empty the boiler, the stem with the valve is set to the middle position through the service menu (menu line d.70).

Maintenance of the gas boiler Protherm Gepard (Panther)

The boiler manufacturer prescribes scheduled maintenance of the equipment annually, before the start of the heating season.

In the Russian Federation, there are “Rules for the use of gas in terms of ensuring safety during the use and maintenance of intra-house and in-house equipment when providing public service on gas supply”, approved by Decree of the Government of the Russian Federation No. 410 dated May 14, 2013.

In accordance with the current rules, in order to ensure the safety of gas-using equipment, household consumers must conclude a maintenance contract with a specialized organization.

In December 2016, the Code of Administrative Offenses of the Russian Federation was supplemented by Article 9.23, which provides for punishment in the form of a fine of up to 30 thousand rubles for individuals, for violating the rules for ensuring the safe use and maintenance of in-house and in-house gas equipment.

Penalties are provided for:

• evading the conclusion of a binding contract for the maintenance and repair of gas equipment in homes;
• refusal to allow a representative of the organization to perform maintenance;
• evasion from concluding an agreement on the performance of work on diagnosing gas equipment;
• avoidance of replacement of gas equipment;
• actions that led to an accident or the emergence of an immediate threat of harm to life and health of people;
• untimely or poor-quality performance of work on the maintenance and repair of in-house or in-house gas equipment.

I do not advise home craftsmen to carry out work on the gas path of the boiler.

The home master, if necessary, can do some simple work which are recommended for maintenance boiler.

Check the serviceability and correct operation:

DHW flow sensor ( hot water). open line d.36 service menu, which displays the readings of this sensor. Open the tap for dispensing hot water and, filling a vessel of known capacity with water, record the time of its filling. Check the correctness of the flow rate sensor measurement l/min. Then they check the inclusion of the boiler burner for heating hot water at a flow rate of 1.5 l/min.

Ionization electrode for flame control system. open line d.44 service menu, which displays the ionization quality parameter. When burning gas in a burner, ionization is considered good if the quality parameter is less than 300 units, and mediocre if the parameter value is in the range of 300 - 1000 units. If the parameter is more than 1000 units and / or the readings fluctuate greatly, then the operation of the flame control system is unsatisfactory and requires emergency repairs such as cleaning the electrode. The ionization electrode is located on the burner on the right.

Correct connection of the boiler to the mains. The Protherm Gepard (Panther) boiler must be connected to the mains through a socket with a grounding contact, which excludes a “zero-phase” connection error. The phase of the mains supply must be connected to the phase conductor of the boiler. In order not to confuse, on the plug and socket, identify and color-code the phase contacts. The boiler must not be connected to socket without ground conductor. Failure to follow these rules may impair the operation of the flame control ionization electrode.

Membrane expansion tank for back wall gas boiler

expansion tank(built into the boiler and external, if any). The water pressure in the heating system in the heated state should be 0.5 more than the pressure in the cold Bar. , no more. The pressure gauge readings on the display are fixed during the period when the circulation pump is not working. If the pressure difference is greater, then it is necessary to check the serviceability or adjust the air pressure in the expansion tank. Check if there is enough volume expansion tank for a given volume of water in the heating system.

Read more: " Setting the pressure in a heating system with a membrane expansion tank«

Check dynamic gas pressure at the gas valve inlet. See the SIT gas valve settings above for the measurement method and allowable pressure range. The gas pressure in the gas network to which the boiler is connected may change over time for various reasons. For example, as a result of connecting new consumers to the gas network, as well as in very coldy due to the large consumption of gas, the pressure in the network may unacceptably decrease. For this reason, the boiler stops or its power decreases. If the pressure value is outside the permissible range, then it is necessary to require the gas service to eliminate the deficiencies.

Check for natural traction in the ventilation duct annually. The room in which the gas boiler is installed must necessarily have a separate channel natural ventilation.

Preventive cleaning of the chimney, channel air supply to the boiler and the ventilation channel of the room are done every five years.

Gas boiler cleaning

Do regular cleaning brushed, vacuumed surfaces in the combustion chamber - gas burner and primary heat exchanger.

To clean the primary heat exchanger, it is better to remove it from the boiler:

1. Switch off and empty the boiler.
2. Open the front lining of the combustion chamber.
3. Fold out the electronics box and protect it from water.
4. Remove the clamps - clamps on the supply and return pipes (1).
5. Disconnect the upper supply and return pipes (2).
6. Pull the heat exchanger (3) forward.
7. Clean the heat exchanger fins of combustion products using a stiff brush and a vacuum cleaner.
8. Reinstall the heat exchanger.
9. Connect the supply and return pipes (2).
10. Fix the clamps on the flow and return pipes (1).
11. Close the combustion chamber with a lid, install the electronics unit in place.

The surface of the gas burner is cleaned from combustion products on site, without removing from the boiler. For cleaning use a hard brush and a vacuum cleaner.

To remove the fan, you need to unscrew only one screw.

Remove the fan from the boiler every 3-5 years, clean the impeller and other surfaces from dirt, lubricate the bearings with a few drops of oil. Don't wait for the fan noise to become unbearable. Pay attention to the condition of the gasket between the fan and the chimney.

Circulation pump

The cap of the automatic air vent should be opened by turning it two turns.

During long downtimes of the boiler, the rotor of the circulation pump sometimes “sours” due to deposits, and the pump cannot start when the boiler is turned on. Before switching on the boiler after long downtime Loosen and remove the rotor plug screw and use a screwdriver to turn the shaft. The location of the pump rotor on the housing is closed with a plug yellow color. If, when scrolling, the shaft creates a lot of resistance, it is necessary to dismantle the pump motor and clean it of dirt.

Gas boiler does not heat hot water

Flow sensor (flow) of water gas boiler Protherm Gepard (Panther)

The DHW water flow sensor is a rotating impeller with blades, the rotation speed of which depends on the intensity of the water flow. From the experience of operating gas boilers Protherm Gepard (Panther) it is known that common cause failure of the DHW heating function in these boilers is shutdown of the turbine due to the ingress of foreign particles into it. Although the impeller is protected from clogging by a strainer, it does not always cope with its task.

If, when the hot water tap is opened, the boiler burner does not ignite, and the tap flows cold water, then check the serviceability of the DHW flow sensor. It is necessary to call line d.36 of the service menu, which displays the readings of the flow sensor. If, with the hot water tap open, the flow readings in line d.36 are equal to or close to zero, then we conclude that the flow sensor is not working.

The location of the water flow sensor is indicated by the green arrow in the figure above.

The water flow sensor is removed by pulling the fixing steel bracket to the left. Having removed the bracket, it is necessary to pull the sensor towards you and pull it out of the socket. Before removing the sensor, it is necessary to drain the water from the DHW path of the boiler, as described above.

To avoid failures in the operation of the flow sensor, it is recommended to supply water to the boiler through an additional filter installed in front of the boiler. tap water.

Cleaning the secondary DHW heat exchanger from scale

It is known that when water is heated in a DHW heat exchanger, hardness salts are deposited.

Depending on the degree of hardness of tap water, the amount of water used and the temperature of its heating, cleaning of the heat exchanger from scale has to be done at regular intervals, every 1 - 5 years.

Read: Descaling the heat exchanger of a gas boiler or gas column.

Read more:

How to reduce the high gas consumption of a boiler for heating a house

Most often, gas boilers are used to heat a private house. They differ high efficiency performance, economy and ease of use. Comfortable operation of such a device is provided by a variety of devices that control the operating mode. Thanks to automation, you can increase the efficiency of work, and ensure the safety and reliability of the unit. These factors are important. Many do not understand how to regulate and control automation. Consider in our article the principle of operation, the security system, the configuration and troubleshooting of gas boiler automation.

The principle of operation of gas boiler automation

Automation is a system of control and executive elements that are aimed at maintaining the specified modes and promptly responding to malfunctions in heating system. Thus, the safe use of gas boilers is ensured with minimal human intervention in the processes that take place in the unit.

Equipped with electronic and mechanical automatic devices that are necessary to maintain safe operation.

Automation can be divided into two types:

• Autonomous, which depend on the power supply;
• Adapted, which work without an external source of electricity.

Let's consider each type in more detail.

Operation of volatile devices

The operation of volatile automation is completely dependent on the supply of electricity. Such a device controls the supply of fuel and the degree of its heating by opening and closing the tap, thus saving the cost of the heating system. The electronic system operates on the basis of information that comes from the sensors in the control unit.

After processing the data on the microprocessor and the controller, the commands are sent to the boiler drives.

Automation performs the following tasks:

1. Turning the appliance on automatic mode.
2. Opening or closing the valve of the gas supply system.
3. Adjustment of the burner flame level using a temperature sensor.
4. Installed or emergency shutdown of the gas boiler.
5. Display on the screen of the level of water heating, air temperature, etc.

In addition to the above functions, modern automation can perform many other tasks. For example, protection of the system against malfunction of the three-way valve, monitoring and control of the boiler, self-diagnosis, detection of failures in the operation of components and protection of the boiler from freezing. Automation helps to identify a malfunction before it leads to a breakdown of the gas boiler.

Automation can only work accurately if the following conditions are met:

• Compliance with the required temperature regime;
• No jumps in the network;
• No problems associated with a long service life.

If you do not follow these rules, then the automation will quickly fail.

Automation includes the following devices:

Thermostat to control the temperature in the room. Such a device is installed indoors, but is connected to a gas boiler, which is located in this or another room. The thermostat controls the temperature in the room, and also regulates the operation of the heating equipment. When the temperature drops, the device sends a signal to the gas boiler, which automatically starts its work.

The temperature sensor located in the room can be connected to a separate control unit. Then the temperature in the room will be maintained automatically. After the room reaches the required temperature, the valve closes and the boiler stops working. Thus, gas is saved.

Daily programmer. The device regulates the operation of a gas boiler, but has more wide opportunities than the previous device. You can set the boiler to work for 24 hours using the daily programmer. At certain times of the day, you can set different heating temperatures. Most devices automatically repeat the cycle, so you need to change the program to change the data. You can connect the daily programmer via a radio channel or cable.

Weekly programmer. With the help of such a device, you can schedule the operation of a gas boiler for a week in advance. You can use any mode or create your own.

For example, the Auraton-2025 programmer is equipped with 3 factory and 7 user modes that help you set a comfortable room temperature. The display is turned off at night using a light sensor. The display shows all job data. The operating radius of the programmer is 30 meters, so it can be placed in any room.

Operation of non-volatile automation

Some elements of the boilers, which are necessary for control, do not need the use of electricity. These devices must be adjusted manually and under the influence of geometric changes that occur under the influence of heat in the mechanisms.

To turn on the boiler, press the washer on the valve. The latter will be forcibly opened, letting in fuel that goes to the igniter. There are many models on the market with electronic control but mechanical are popular. There are several reasons for this:

1. Low cost.
2. Ease of use.
3. Reliability. Such devices do not depend on power surges or power outages, so they can work without a stabilizer, which is needed when working with volatile equipment.

Disadvantages of this type:

1. Low adjustment accuracy.
2. It is necessary to monitor the operation of the boiler.
3. Manual setting.

The device has a temperature scale, where the numbers indicate the minimum and maximum values. In order to install operating temperature, it is necessary to set a mark on the gradation ruler.

After the boiler has started to work, the thermostat is responsible for its functioning. When cooled, the rod of the device opens the gas supply valve and thus, due to the increase in temperature, increases in size and then shuts off the gas supply. This process helps to increase or decrease the heating temperature.

Safety system

The gas boiler security system includes many elements that can be divided into 2 groups:

• Devices that help comfortable work boiler;
• Devices that are responsible for the safety of equipment.

The second one is the thermostat safety valve, as well as a flame and draft control sensor.

The flame control sensor consists of the following elements: a solenoid valve that turns the gas supply on and off and a thermocouple. The thermostat maintains the desired temperature of the heat carrier and protects against overheating. When the coolant reaches a critical level, the module turns on or off the boiler.

As the temperature rises, the location of the bimetallic plate changes, it bends and closes the pipe through which the gas is supplied. Thus, the draft control device cuts off the fuel supply to the burner.

The safety valve regulates, distributes and shuts off the gas flow. In a heating system, such a device is an inextricable element of pipeline fittings, which is of great importance in controlling the volume of a heat carrier.

The movement of fuel is carried out through a hole in the valve, which is called a seat. In order to turn off the equipment, it must be closed with a piston.

Gas valves are single-stage, two-stage, three-stage and modulating.

The first type has 2 operating positions: on and off.

Two-stage has 1 input and 2 outputs. The valve opens after turning to an intermediate position, so the inclusion is smooth.

Three-stage is used for gas boilers with two power levels.

The latter are used to smoothly change the boiler power value.

Automation is used for safety and convenience. The user does not need to perform many tasks on his own. This includes the selection of a comfortable operating mode, diagnostics, auto-ignition of the burner, etc.

How the autoblock works

Manufacturers make control units that include all of the above devices. Even if they differ in appearance, their principle of operation still remains the same.

Automation from the Italian manufacturer EuroSIT is very popular. The brand 630 can be noted, which has many functions, reliability and long service life. Consider the device of an automatic block of such a model.

The EuroSIT 630 automatic block consists of the following elements:

1. Casing, which consists of a pressure regulator module, a spring valve and a shut-off valve. Thanks to this, its device is facilitated.
2. Gas is supplied through a pipe connected to the body.
3. Cables from sensors and other elements are connected to the body.

Boiler automation setting

Regulation provides for the adjustment of automation that supports the desired temperature regime located in the liquid circuit, and in an emergency blocks the gas supply.

Before moving on to setting up automation, it is necessary to mount the equipment in accordance with the drawing. And also you need to check the complete set of device elements, which must match the one stated in the instructions. You can adjust the automation with a knob. It helps to transfer the boiler to 3 positions: switching on, ignition and temperature setting (1-7). In order to turn on the igniter, you need to move the handle to the second position, setting it against the spark icon. The pilot burner is ignited by a piezo ignition. The lever should be held in one position for 30 seconds. After you release the button, the igniter should stop working. The thermocouple begins to heat up when the flame is ignited, so an EMF of 25 mV begins to be generated in it. Consequently, a chain is formed, the links in which are the solenoid valve and the sensor.

To open the solenoid valve, you need to press the lever, the gas will be supplied to the igniter. The thermocouple provides protection against backfire penetration. The sensors in the working position, which are related to the circuit elements, are closed. After a signal is received, they open and the equipment is turned off.

Problems when turning on the ignition element

If you have problems when turning on the device, then you should use the instructions. First of all, you need to purchase a screwdriver and open end wrench, pliers, multimeter and alcohol for cleaning parts.

1. It is necessary to remove the terminals of the device. They are closed to each other, and then pressed with pliers.
2. In order to find out the cause of the breakdown, turn on the igniter. If the ignition is normal, then the malfunction is probably in the draft sensor. You need to unlock this item.
3. It is necessary to inspect the contacts, which must be fixed on the body and not have signs of oxidation.
4. In the open state, the temperature should be 75 degrees.
5. The resistance should be 1-2 ohms. You can measure it with a tester. If a malfunction was found, then this element must be replaced.
6. At normal operation its parts must be wiped with alcohol and performed reverse installation device.
7. In order to check the thermocouple pull-chopper, it is necessary to remove the terminals and check the resistance, which should have an indicator of 3. If the value does not match the required value, then unscrew the nut with a No. Next, you should get a plastic insert with contacts and unscrew the part completely.
8. To check the thermocouple, a solenoid valve is connected and secured with a #9 key. If, after checking, ignition does not occur, then this part is faulty. The nut that fixes the thermocouple to the igniter must be unscrewed with a No. 10 wrench, then the part is installed in the required position.
9. In order to evaluate the result, the EMF is measured (the optimum value is 18 mV), after which the thermocouple contacts and the elements of the traction chopper are cleaned with alcohol. The last step is to assemble the device.

Troubleshooting automation issues

Most often, ignition does not occur due to contamination of the insulator along which the wire leading to the combustion chamber is arranged. You can fix this problem by wiping the element with a soft cloth. If the part is heavily soiled, then it can be wiped with a solvent and wiped dry.

Another reason may be soot deposits that form in the combustion chamber. By knocking on the tube that leads the gas to the burner, this problem can be solved. If the device has not been used for a long time, then it is necessary to check the condition of the pipes.

V modern boilers faults are indicated on the displays in the form of codes. If the water does not heat up well, then deposits on the walls of the heat exchanger may be the cause. To eliminate the problem, you can flush the circuit hot water with added minerals. If this method does not help, then it is better to contact specialists. The cause of poor heating may be a malfunction of the electronics or flow sensor.

For gas boilers of high power, the “clocking” effect may occur, which appears due to frequent switching on. The equipment often turns on due to the strong heating of the gas. To fix the problem, you need to reduce the fuel consumption that enters the burners. In the electronic model, you can set the desired mode on the display, and in the mechanical one, by rotating the adjusting lever on the gas valve. To increase the service life of a gas boiler, a preventive inspection should be carried out on time.