Most often for heating a private house are used gas boilers. They are highly efficient, economical and easy to 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 automation gas boiler.
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, it is provided safe use gas boilers with minimal human intervention in the processes that take place in the unit.
Equipped with electronic and mechanical automatic devices required to maintain safe operation.
Automation can be divided into two types:
- Autonomous, which depend on the power supply;
- Adapted that work without external source 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 fuel supply 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:
- Turning the appliance on automatic mode.
- Opening or closing the valve of the gas supply system.
- Adjustment of the burner flame level using a temperature sensor.
- Installed or emergency shutdown of the gas boiler.
- 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, system failure protection three-way valve, control and management of the boiler, self-diagnosis, detection of failures in the operation of units 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 long term services.
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 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 electronically controlled models on the market, but mechanical ones are popular. There are several reasons for this:
- Low cost.
- Ease of use.
- 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:
- Low adjustment accuracy.
- It is necessary to monitor the operation of the boiler.
- 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 contribute to the comfortable operation of the 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 the heating system, such a device is an inextricable element pipe fittings, which has great importance in controlling the volume of the 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 is very popular Italian manufacturer EuroSIT. 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:
- The casing, which consists of a pressure regulator module, spring valve and cutter. Thanks to this, its device is facilitated.
- Gas is supplied through a pipe connected to the body.
- 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. Therefore, a chain is formed, the links in which are solenoid valve and 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 an open-end wrench, pliers, a multimeter and alcohol to clean parts.
- It is necessary to remove the terminals of the device. They are closed to each other, and then pressed with pliers.
- 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.
- It is necessary to inspect the contacts, which must be fixed on the body and not have signs of oxidation.
- In the open state, the temperature should be 75 degrees.
- 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.
- During normal operation, the part must be wiped with alcohol and performed reverse installation device.
- 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, get plastic insert with contacts and unscrew the part completely.
- 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.
- 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 the instrument assembly.
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.
In modern boilers, malfunctions 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.
Today, gas heating boilers are the most common devices for heating a home. Right choice boiler in terms of power and other necessary criteria will help to avoid many problems in the future.
The following functionalities are usually considered as selection criteria:
Volatile boilers require electricity and the presence of natural gas under a certain pressure. If one of these two components is missing, the boiler will not turn on. Each owner is required to know how to turn on a gas boiler, but this requires a clear understanding of the processes that occur when a gas boiler is started. For example, a non-volatile boiler is equipped with a 630 EUROSIT mechanical controller.
How the gas boiler starts with this equipment, and what happens at each subsequent step, we will consider the points:
Possible malfunctions when starting the boiler and methods for their elimination
Like any technical device the gas boiler may break down. If an electronic controller is installed in the boiler, then only a specialist who has experience, knowledge and the necessary devices can troubleshoot it. But sometimes the gas boiler does not work for a very simple reason, which the owner can easily eliminate on his own. If the gas boiler does not turn on, possible causes and remedies will be discussed below.
Igniter does not turn on
If the igniter does not turn on, then possible reason– contamination of the insulator through which the high-voltage wire passes through the boiler body into the combustion chamber. Such a malfunction is eliminated by wiping the insulator with a clean rag. If the contamination is very strong, then you can apply some kind of solvent and then wipe dry. Sometimes a soot deposit forms inside the combustion chamber between the candle and the boiler body, soot is carbon, which is a conductor and prevents the creation of a spark. Such a malfunction is eliminated by lightly tapping on the pipeline supplying gas to the burner.
The igniter turned on, but when the control knob is turned, there is no gas supply to the main burner. Of course, the causes of such a malfunction may be a thermocouple or solenoid valve, a malfunction of the thermostat or supply valve. To diagnose such problems, you need practical experience and intervention in the automation unit, which directly prohibits the instruction. But most often, especially before the start of the new season, the cause is a cocoon that a spider has twisted at the point where the main pipe is connected from the controller to the main burner. Carefully unscrew the nut and remove the spider nest.
Water does not heat up
If the water in the DHW circuit does not heat well, then this indicates that there may be too many deposits on the walls of the heat exchanger. To eliminate such a malfunction, the DHW circuit must be washed with hot water with the addition of substances that dissolve mineral deposits on the walls. For boilers with an electronic control system, poor water heating in DHW system may be due to malfunctions of the electronics or flow sensor. Repair is quite complicated and is available only to specialists who understand what and how to do.
"Boiler clocking"
When choosing a boiler with too high power, a phenomenon called “boiler clocking” may occur.
When “clocking” occurs, the gas boiler turns on too often due to too intense heating of the coolant.
Knowing how to set up a gas boiler in such a case is very important. After all, when the boiler is “clocked”, gas consumption increases, frequent operation of automation leads to premature wear. To eliminate this unpleasant phenomenon, it is enough to reduce the gas supply to the burners. Carefully studying the instructions, we find gas valve, adjustment method and reduce the gas supply to the burners.
In most boilers, gas adjustment is carried out by turning the adjusting screws on the gas valve. But in some modern boilers, it is possible to adjust the gas supply to the burners only from the control panel. In the instructions for gas boilers, malfunctions and methods for their elimination are usually indicated in a separate section.
Features of the operation of gas boilers with electronics
Modern high-tech boilers are equipped with sophisticated electronics. Information about the current state of the product and any problems that have occurred is displayed as an error code.
Electronic components are very sensitive to unstable supply voltages.
Let's take as an example a reliable Junkers gas boiler whose malfunctions the diagnostic system displays on the display in the form of a specific code. He has the most common mistake - the failure of the control board. Such a malfunction occurs in 95% of all cases according to the reviews of repair specialists.
Repair of electronic control systems is possible only in specialized workshops. Therefore, it is better to refrain from buying a high-tech boiler in the absence of after-sales service in the region. If such a unit is purchased, then in order to exclude the possibility of failure of complex electronics, measures must be taken in advance - install voltage stabilizers or.
The principle of operation of a gas boiler is based on heating the circulating liquid 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. Due to the open design, the air necessary for the combustion reaction is supplied to 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 chambers combustion requires the presence of a chimney.
Most often it is 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 industrial equipment high power
- 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) - work on 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. A low pressure region is created between the nozzles and the outlets, which helps to continuously pump 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:
- engine;
- fan;
- automatic control unit;
- reducer;
- air pressure switch;
- 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. Gas equipment is 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 burner is purchased for small heating equipment high power. 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.
- Starting 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:
- Install the device on the boiler.
- Connect to the gas pipe.
- Check for absolute tightness.
- Remove the burner housing.
- Using a manometer, measure the gas pressure at the inlet.
- Connect to electricity. Make sure that the jumpers, phases are connected correctly.
- Install a gas analyzer in the chimney.
- Start device.
- 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.
- Adjust the air flow with an air damper.
- 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.
(performed if the measured pressure does not correspond to the table value or when switching to another type of gas)
SIGMA gas valve setting
- Switch off the boiler with the button on the boiler control panel.
- Unscrew the cap screw of the fitting “A” for measuring the outlet pressure of the gas valve by 1 - 1.5 turns.
- Connect a pressure gauge to port "A".
- Remove the protective cap from the valve modulation coil adjusters.
- Turn on the boiler in the "Chimney sweep" mode.
- After pressure stabilization (indication of burner power = 100%), measure and, if necessary, adjust the maximum gas pressure by turning the nut “C” (see the table attached to the boiler).
- Remove one of the terminals "E" of the modulation coil, measure and, if necessary, turn the screw "D" to adjust the minimum gas pressure (see table).
- Replace the modulation coil terminal and check the value of the maximum gas pressure.
- Switch off the boiler.
- Disconnect the pressure gauge from port "A".
- Tighten the plug screw "A".
Install and seal the protective cap.
Note: while turning the nut "C", hold the screw
Winding resistance gas valve SIT 845 Sigma
Private construction is gaining momentum, and with it the demand for modern heating equipment, uninterruptedly providing consumers with thermal energy for heating the house and heating water for household needs.
Gas boiler - central link of the system gas heat supply created for such purposes. Being one of the most economical devices, it nevertheless needs to be properly adjusted to ensure proper fuel consumption and reliable operation.
Selection and configuration of equipment
The issues of operating the heat supply system of a private house, in contrast to centralized systems, fall entirely on its owners. And one of the problems that have to be solved is the question correct selection gas equipment.
Experience in the operation of systems shows that a properly selected boiler should work at least 30% heating period.
The average value of the boiler power consumption per square meter heated room ( with ceiling heights up to 3 meters) is about 100 watts.
Practice also shows that the installation of a boiler or burner with too high power can create a lot of problems associated with excessive gas consumption, the difficulty of selecting the temperature in heated rooms and the reliability of the system.
After the selection and installation of the heating system, as well as each time it is started the following adjustments are made:
- Full boiler heating.
- Complete gate opening chimney.
- Exposing the burner flame for maximum power(the flame should be made up of blue and yellow segments).
- Shutting off the gas supply valve on the descent for removal yellow flame segment.
- Examination safety automation and operating modes boiler.
Important! Setting right color gas burner flame key to complete gas combustion without the formation of soot deposited on the walls of the furnace and chimney, which reduces the efficiency of the system and increases consumption gas fuel.
How to adjust burner power
If the burner is significantly more powerful than the boiler, it may not enough firebox, air flow through the gates and from pressurization. The combustion of the flame in this case becomes uncontrollable, and the flame of the burner turns yellow.
Incomplete combustion of gaseous fuel causes sooting of the furnace and chimney combustion products, and part of the energy is dissipated into the surrounding space, increasing fuel consumption.
Photo 1. The shut-off valve helps to regulate the gas supply in case of problems with the boiler.
In this case, the burner power can be reduced cover the gas supply valve on the down.
However, if the power is permanently set to minimum value , this will reduce the efficiency and range of adjustments of the system.
Reference! When choosing a gas burner, in addition to combustion chamber dimensions and flame geometry, it is important to take into account the correspondence of passport values minimum and maximum power and ways to regulate it, as well as gas consumption by the burner.
High gas consumption
Cause high flow gas is often inefficient operation of the heat exchanger boiler. The coolant passing through the heat exchanger carries with it particles of scale and salts, which can be deposited on the internal walls of the heat exchanger, reducing its thermal conductivity and increasing the amount of fuel required for heating.
Usually the problem with the heat exchanger manifests itself characteristic noise emanating from a working boiler, resembling a whistle or gurgling, similar to boiling a kettle.
In this case, you will need manual cleaning heat exchanger or washing with a special composition.
The reason for the high gas consumption can also be its reduced calorie content caused by its insufficient drying by the gas distribution company. The rate of lower calorific value of domestic gas should be at least 7600 kcal per one cubic meter , in practice, the calorie content of gas can decrease up to 4000 kcal.
Important! When purchasing gas equipment, it is important to take into account composition and minimum gas pressure in a specific gas supply system so that the equipment works stably.
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Lack of combustion air
Lack of air for burning gas can be caused by boost system malfunction. In this case, you need to check electronic temperature controller settings and supercharging as well throttle valve.
If the burner ignites with a pop, this may indicate that the primary air inlets are closed or clogged with dust.
In this case, it is necessary to adjust the flame air regulators or clean the holes from dust.
If the flame has a significant yellow segment, it may be caused by burner defect. In this case, the burner power can be reduced by closing the gas supply valve on the downstream.
Overpressure: adjusting the gas supply valve
When the burner is operating, the following situations may occur:
- burner flame color red-orange or red;
- burner flame is knocked out outside the space allotted to him;
- burner flame lights up and immediately or after some time goes out, or lights up with cotton.
These signs may indicate high blood pressure gas in the gas supply system, because in winter the gas supplier often increases the standard pressure from 200-220 mm w.c. Art. up to pressure 280 mm w.c. Art.
In this case, you can lower the gas pressure:
- cover the gas supply valve on the way down;
- installation specified in the passport for the burner throttle washer;
- installation gas pressure regulator.
Important! By purchasing gas equipment, especially imported, it is important to consider it work in a specific gas supply system, since each manufacturer produces equipment with its own values operating optimum and minimum gas pressure.
Weak boiler draft
Weak traction may appear on various reasons. If the burner lights up and then goes out immediately, or ignites with a pop, this may mean Availability a large number soot in the boiler and or in the chimney, interfering with the creation of draft.
In this case, it is necessary to check the presence of draft in the chimney and in the boiler. through the viewing window, and, if necessary, clean them of soot yourself or by contacting a special service.
Weak traction can also occur when the weather changes, which does not allow gases to leave the furnace, and supply air to enter the boiler.
In this case, it is necessary reduce the burner power by closing the gas supply cock on the descent, as well as to organize sufficient ventilation in the room.
Reference! With a weak draft of the boiler, it is also important to clarify the design of its chimney, it must comply with the rules SNiP 2.04.05-91 and DBNV.2.5-20-2001.
Clocking
If the boiler capacity exceeds the size of the heated premises, this may lead to frequent switching off and on of the boiler for heating, or clocking.
The clock frequency can reach 2-3 minutes.
To avoid clocking, it is necessary.
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