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Boiler attacks 24 wall-mounted gas valve setting. Adjustment of gas boiler automation: device, principle of operation, tuning tips. Reduced gas consumption

Professional Customization gas boiler starts before purchase. First, its power is determined, which is necessary for high-quality heating of the house. The following is an instruction that will help you properly set up the unit with your own hands, as well as the features of setting the thrust regulator of a solid fuel unit and other components heating system.

Setting up a gas boiler with your own hands

The minimum power is calculated by calculating the heat loss per unit of time. Heat escapes through window structures, walls and ceilings, as well as doors and ventilation system. Another loss is due to the difference between the temperature indicators inside and outside the room. If the house is insulated according to modern energy saving criteria, then the formula is as follows: 1 m 2 \u003d 100 W.

Most modern boilers can set the maximum power of heating and hot water separately: the heating level is reduced, and in the hot water mode, the boiler produces the highest power. Such control is mainly available in the service menu. It is performed by experts. By a similar principle, the maximum and minimum gas pressure is regulated. It creates limits on power and heating, as well as hot water. This setting is also performed only by specialists. Gas leakage can be monitored by monitoring the burner flame.

Video: how to set up an Electrolux gas boiler

Temperature control

First of all, a boiler with a thermostat is bought. Here, the burner output must be controlled in such a way that the temperature of the water remains stable. This thermostat integrates with the temperature sensor in the room. Sensor on comfortable temperature which suits all residents of the house.

Thermostat for gas boiler

Current thermostats are able to detect the difference between indoor and outdoor temperatures. For these purposes, two sensors are installed: internal and external. Only such control does not control the temperature in each room apart.

This can be corrected by installing special valves in front of all batteries in the supply pipe. At the same time, the heat carrier in the boiler should have a parameter of no more than 55 ° C. And the lower it is, the more efficient the gas boiler will be.

How to calculate the efficiency of a gas heating boiler

The calculation method is as follows: the thermal energy that has gone to heat the heat carrier is compared with the actual volume of all heat generated during gas combustion. In production conditions, the formula works

η = (Q1/Qri) 100%

Here Qri is the total amount of thermal energy generated by gas combustion.

Q1 - heat accumulated and used for space heating.

This formula does not take into account the potential heat loss, deviations in system performance and other factors. With the help of calculations, the average efficiency of a gas boiler is obtained. Many manufacturers indicate exactly this data.

Usually, the error in calculating the thermal efficiency is estimated on site. This is how the formula works

η=100 - (q2 + q3 + q4 + q5 + q6)

q2 - heat losses in the results of combustion and exhaust gases.

q3 - losses due to incorrect proportions of the gas-air composition, in turn, they cause gas underburning.

q4 - losses due to the formation of soot on the heat exchanger and burners.

q5 - losses due to external temperature.

q6 - losses due to cooling of the combustion chamber when it is cleaned from slag.

The actual efficiency of the boiler is calculated only on site. It is also affected by how professionally the chimney was created and the boiler was installed.

The q2 component has a huge impact on the efficiency. When the activity of heating the exhaust gases decreases by 10–15 C, an efficiency of 1–2% develops.

Ways to increase efficiency

Ways to improve the efficiency of the boiler are associated with competent maintenance and timely elimination of malfunctions and pollution:

  1. There is a physical disability. The solution is to maintain the cleanliness and normal condition of the flame pipes and the water circuit (if the boiler is double-circuit). Soot must be removed from the pipes in time, and scale from the circuit.
  2. Excess air has accumulated in the boiler. The solution is to install a draft limiter on the chimney.
  3. You need to adjust the blower damper. This is where a thermometer helps. The damper is fixed in such a position that the heat carrier reaches the maximum temperature.
  4. Maintain normal traction. It decreases when the cross section of the chimney narrows. Therefore, regularly clean the exhaust pipe from soot, the combustion chamber - from soot. This will also reduce your gas consumption.

These methods are applicable to all modifications of gas boilers:

  • wall;
  • floor;
  • Double-circuit;
  • old.

In old boilers, it is somewhat dangerous to increase the efficiency, because the device may no longer withstand optimal operation. But if you still set yourself such a goal, then:

  • it is possible to increase the dynamics of water circulation in this system. Need to install a special pump - circular;
  • use special materials and thermal protection.

How to fix an igniter

Igniter for automation

It may not turn on because the insulator is dirty. Through the insulator, the high-voltage wire goes through the housing into the combustion chamber. The solution is to wipe the insulator. Need a rag. If the contamination is strong, use a solvent to remove it.

Soot can build up in the combustion chamber. It prevents sparks. The solution is to knock a little on the pipeline through which the gas goes to the burner.

If the ash pan turns on, and gas does not go to the main burner, then the following may be to blame:

  • thermocouple;
  • supply valve;
  • thermostat;
  • solenoid valve.

Diagnostics of these parts implies the presence of practical skills and implementation in the automation unit.

And also at the contact area of ​​the main pipe to the main burner, there may be a spider cocoon. The solution is unscrewing the nut, removing this cocoon.

Working with the DHW circuit

Heat exchanger housing

If the water in this circuit is poorly heated, then the walls of the heat exchanger are covered with deposits. Solution - the circuit is flushed hot water, in which there are elements for dissolving these deposits. When a similar problem occurs in devices with electronic system, this may be a manifestation of a malfunction in the electronics or duct parts. Only specialists can fix this.

Clocking problems

When a very powerful boiler is in operation, “clocking” may begin. At the same time, the heat carrier heats up very intensively, and gas consumption increases, and automation often works. As a result, the boiler quickly fails. The solution is as follows - the gas supply to the burner is reduced. After carefully studying the instructions, you need to find gas valve, setting method and reduce this feed.

Example of a new gas valve

Most often it is necessary to turn the adjusting screws on the gas valve. In some modern models gas supply is adjusted only in the control panel. The instructions for them usually indicate plans for this setting.

The nuances of working with electronics

Modern boilers, from the high-tech category, are equipped with sophisticated electronics. Data about the current conditions of the device and its resulting problems are reflected on the display: an error code is displayed. For example, a reliable Junkers model. Its shortcomings are displayed by the diagnostic system on the display: a code is displayed. The most common problem here occurs with the control board.

Such systems are repaired only in special high-level workshops. Therefore, you should not purchase a high-tech modification if there is no such workshop nearby. If, nevertheless, such a purchase took place, it is necessary to put in advance special devices: stabilizers or UPS.

An example of mounting a stabilizer for a gas boiler

Ways to regulate the power of the burner

Useful thermal power is reduced by reducing the gas supply to the burner. To do this, you need to adjust the gas valve.

Gas valve at a glance

A connector with yellow wires is built into a stepper motor. And in modern devices, as a rule, the gas valve is adjusted using the specified engine. It is controlled from the control panel of the device through the service menu.

Checking and adjusting traction

As already mentioned, the presence of normal draft develops the efficiency of the boiler. Traction should be checked and adjusted regularly. The methods are:

  1. Working with an anemometer. Thanks to this device, the dynamics of the movement of gases is calculated. Modern instruments can accurately identify the thrust parameter and make a verdict on the reasonableness of starting equipment. However, the prices of this device are quite high.
  2. Work according to the "grandfather" method. Take a sheet of toilet paper, you can take other paper. The main thing is that it should be light. Bring this leaf up to the chimney. It will detect if there is traction and how active it is. If the sheet deviates strongly under the influence of the wind, then the traction is good.
  3. Detection of mechanical impurities. The most common cause of draft dilemmas is clogged pipes. You can identify the presence and degree of blockage as follows: lower the metal ball on a rope or fishing line. The starting point is the top point of the chimney. The end is its lowest point. If the ball easily reached the set point, then the chimney is clean. And if the removal of smoke is still problematic, it means that difficulties have appeared in another area. Perhaps the length or width of the channel is insufficient for effective operation.

It is also possible to identify a blockage visually, if the design of the chimney allows this to be done.

Traction Development Methods:

  1. Structural flaws, such as a weak pipe diameter or many bends in the channel, are eliminated only by re-laying the pipe. In other cases, simpler methods apply.
  2. If the pipe is not high enough, it needs to be built up. If you work with bricks, carry out additional masonry. Mounted on a metal pipe additional element. He brings the structures to the required height - 5 m. Calculation from the furnace.
  3. If the channel has narrowed due to the abundance of soot, cleaning is done with a brush and weight on a rope. This device is lowered into the pipe. And with progressive maneuvers, the passage is cleared.
  4. If the tightness of the brick chimney has weakened, it is strengthened with a special solution. They cover up the gaps. In more difficult situations, part of the pipe is laid out again.
  5. If the dimensions of the channel are sufficient, sleeving follows. This operation requires a ceramic or metal pipe. The chimney becomes airtight. Efficiency develops round section channel. Gases are removed without problems.

If you urgently need to develop traction, and the weather is not happy, there are such ways for this:

  1. At negative temperatures cold air creates pressure. It interferes with the outgoing stream. To warm up the pipe, you can burn in it a small amount of paper. You also need to insulate the pipe well.
  2. When the street is raging strong wind, a deflector will help develop traction. It is mounted on a pipe. And when there is a wind effect, a low pressure is obtained in the deflector. It develops traction. Its diameter is determined by the dimensions of the chimney. When there is no wind, the device does not favor increased traction. Stainless steel is used for its manufacture. Therefore, the deflector is resistant to high temperatures and humidity.
  3. A similar effect is obtained from a rotary turbine. She is placed on a pedestal. Under the influence of the wind, it rotates, so the air moves in smoke channel. A spherical design with blades protects this channel from various objects and precipitation. The turbine is mounted for a model with a modest temperature of the outgoing gases.
  4. Protection is being created for the mouth of the pipe - this is the installation of a weather vane. The weather vane rises so that the smoke rises from the leeward side, and the surrounding air develops thrust. With this device, the possibility of draft failure in the chimney is reduced. Its moving element needs to be lubricated frequently so that corrosion does not ruin it. Another weather vane needs periodic cleaning of soot.

Reduced gas consumption

As already mentioned, these costs are lower when your house is thoroughly insulated. It is also important to properly adjust the temperature in the room.

A good option to achieve the given goals is associated with a slight decrease in temperature. For example, residents feel comfortable even at plus 20 ° C. So why then drive the device to 25 ° C or higher. This uses up more energy.

You can reduce gas consumption by installing special temperature controllers. They are able to configure the on and off of the device. They are very convenient because they allow you to adjust the temperature in the room even in your absence. The instrument will work to store the value you previously set.

How to set up a draft regulator and other components for solid fuel boilers

Solid fuel boiler in schematic form

These methods help to adjust the temperature and thrust of the device. They are:

  1. The unit heats up to +80°C.
  2. With the help of the setting handle, the temperature is set on the draft controller, which is reflected on the boiler thermometer.
  3. A chain is pulled on the air damper. The damper must take such a position that the boiler can reach the desired temperature. Under such conditions, the void between the damper and the housing varied in the range of 2–50 mm.
  4. The traction controller is checked for other temperature data: the parameter is set to 90 ° C in the settings. You need to figure out how the controller will support this parameter. When the parameter reaches 95°C at the boiler outlet, the controller must close the gap damper 2–5 mm. If the boiler has a restrictive screw, it will prevent the damper from closing. Use it to adjust the gap.
  5. Action for a boiler with two circuits. After calibrating the thrust controller, set the desired temperature parameters at the outlet of the apparatus, within 85°C.

Video: installation and configuration of automation for a solid fuel boiler

Development of the efficiency of such a boiler

The efficiency of this boiler is mainly determined by the type of fuel and its structural specifications.

For example, when coal, firewood or pallets burn, a lot of heat energy is generated. The technological method of fuel combustion in the corresponding compartment and the type of heating system have a huge impact on the efficiency.

When burning anthracite, hard coal and peat briquettes, the average efficiency is 70–80%. When burning pallets - up to 85%. When burning pellets, there is a high efficiency and an incredible amount of thermal energy.

If your boiler is solid fuel over time, it needs to develop efficiency, you can study the instructions for understanding. Usually manufacturers indicate ordinary methods. But over time, they work extremely poorly. And today, such a method of increasing the efficiency of solid fuel boilers has gained great fame: another heat exchanger is mounted. It must remove thermal energy from the volatile combustion products.

Before installation, be sure to find out the temperature data of the smoke at the outlet. To do this, use a multimeter. His position is in the middle of the chimney. Information about the potential amount of heat that can be obtained will help calculate the area of ​​\u200b\u200bthe additional heat exchanger.

The further algorithm of operations is as follows:

  1. A certain amount of firewood is loaded into the combustion chamber.
  2. Determine how long this amount of fuel will burn through.

Example: 14.2 kg of firewood loaded. The duration of their burning is 3.5 hours. The smoke parameter at the outlet is 46 0 С.

In an hour, 4.05 kg of firewood burned down. This is the result of such a calculation: 14.2: 3.5.

To calculate the volume of smoke, use the general value - 1 kg of firewood equates to 5.7 kg of smoke gases. Further, the previous result of 4.05 is multiplied by 5.7. It turns out 23.08. This is the mass of volatile combustion products. Start from this value for others by calculating the amount of heat energy that will be needed to heat the new, attached heat exchanger.

Knowing the heat capacity parameter of volatile heated gases (this is 1.1 kJ / kg), we can calculate the power heat flow. This is necessary when the smoke parameter decreases to 160 0 С (from 460 0 С).

The following formula works here

Q \u003d 23.08 x 1.1 (460-160) \u003d 8124 kJ.

So the exact parameter of additional power is displayed. It is created by combustion products. It turns out like this: q \u003d 8124/3600 \u003d 2.25 kW. This is a decent indicator. It can drastically increase the efficiency of your boiler.

Knowing how much energy is being wasted, adding a second heat exchanger makes sense. New thermal energy is created. Both the efficiency of the boiler and the entire heating system increase.

Video: more about efficiency for a solid fuel boiler

Setting up, as well as increasing the efficiency for any stand-alone device, is not always a difficult, but very responsible undertaking. Where there should be no hint of doubt. Therefore, in case of difficulties that arise in the process of refinement or even repair, it is advisable to get advice from a master on this class of equipment.

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 the gas network.

Manufacturers of double-circuit gas boilers of many trademarks installs a gas valve from the Italian company SIT on the boilers. Maximum and minimum power boiler burners are produced 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 of the dynamic pressure goes beyond the specified limits, then it is necessary to 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.

Clocking in DHW mode is eliminated 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 loud noise 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 of the service menu and the 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 maximum temperature coolant not higher than +70 °C, (on 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 non-freezing liquids entails a decrease in heat transfer efficiency, higher temperatures on the surface on the walls of the heat exchanger and its rapid wear, an increase in the corrosion effect and viscosity, erosion 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 radiators or control valves during 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 in the use and maintenance of in-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 violation of 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:

sensor DHW consumption (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, note 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 urgent repair, for example, 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, over time different reasons may change. 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 natural ventilation channel.

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 a long period of inactivity, loosen and remove the rotor plug screw and turn the shaft using a screwdriver. 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

Complete technical description of the gas valve Eurosit 630

To date, this is the most common gas valve installed on non-volatile gas boilers of Russian and foreign production. Below we provide yourattention to detailed information on this device, which, in our opinion, can be very useful not only for professionals.Information provided by SIT Group.

If you are directly interested in diagnosing a malfunction of AOGV boilers with imported blocks, we bring to your attention "

So. What is Eurosit 630, in fact? This is a multifunctional gas supply regulator with a modulating thermostat and the function of full modulating activation of the main burner. Eurosit 630is a non-volatile device, which makes it unique for solving problems of any kind, for example, the operation of a boiler from a gas tank or from cylinders to liquefied gas, without usesources of electricity. The valve is available in various designs and can be used in gas convectors, gas boilers, grills and other very diverse gas-consuming equipment that requires precise temperature control.

Main technical capabilities

In parentheses, we give the designation of the function, which will help in understanding the two working schemes below.

1. Control knob with "off", "ignition", "temperature" positions. (MS)
2. Thermoelectric flame protection system (we are talking about a thermocouple) with blocking the gas supply to the main burner after switching off(blocking is available after switching off the boiler, i.e. it means protectionfrom outside inclusion, such as children). (GM)
3. Maximum gas flow adjustment device (RQ) or, optionally, a pressure regulator. (PR)
4. Adjustment screw for minimum gas flow. (by pass)
5. Modulating thermostat with the function of completely turning off the main burner. (TH)
6. Gas outlet to pilot burner with gas flow adjustment screw. (RQ)
7. Inlet filter and pilot burner filter. (FL)
8. Fittings for measuring gas pressure.
9. Gas supply, optionally from the side or from below.
10. Options for gas connections of the multifunctional regulator: a pipe with an external thread or a pipe connection with a nut with a seal.

Two options for working schemes (with pressure regulator and without pressure regulator)


Technical data of the valve Eurosit 630 (standard EN 126)


For reference. The EN 126 standard applies to control devices with two or more functions, one of which is blocking the gas supply.

Connections 1/2 ISO 7
Working position - any
Gas used (families) - 1,2 and 3
Maximum inlet gas pressure - 50 mbar
Regulator setting range from 3 to 18 mbar
Working temperature environment from 0 to 80C
Pressure regulator (optional) - Class. With
Torsional and bending stability - Group 2
Thermoelectric protection system (when used)
Ignition time less than 10 sec
Reset time less than 60 sec
Estimated glass of ignition cycles - 10.000
Manual reset system: Estimated number of reset cycles - 10.000

Characteristics

Characteristics of the thermostat with the function of total shutdown of the main burner are shown in the following table and graph:

Gas consumption

EXPLOITATION

Ignition of the pilot burner

Make sure the control knob is in the "off" position, turn the control knob to the "spark" position. Press the control knob and ignite the pilot burner by holding the control knob for a few seconds. (Fig. 1)



Release the control knob and check that the pilot burner is lit (Fig. 2). If the pilot burner goes out, repeat the ignition procedure. If all other attempts to start the pilot burner did not lead, either the circuit is faulty or the circuit between and the breaker is broken.

Temperature selection

Turn the control knob to the position corresponding to the selected temperature (Fig. 3)


Duty position

Turning the control knob from the selected temperature to the "spark" position will extinguish the main burner and the pilot burner will remain lit. That is, in fact, this position puts the boiler, like "the car is idling." Is the boiler working? Yes. Warm? No.

IMPORTANT! This mode allows you to cool down the boiler when you need a sharp change operating temperature boiler from larger to smaller. Otherwise, without cooling the boiler in this way, you can easily "crush" the cylinder of the modulating thermostat (in Russian, (as in the Zhukovsky boiler)

Boiler shutdown

Turn the control knob to the off position. (Fig. 4)

ATTENTION! Restarting the device after an unexpected emergency shutdown can be done approximately one minute after the boiler has been switched off. Because turning the handle to the "pilot" position is possible only after the flame control thermocouple has cooled down. (i.e. the knob should bounce up instead of staying in the depressed position). While , the thermoelectric flame control device is in the blocking position.

Installation

The Eurosit 630 gas valve complies with current safety standards. Installation on gas-consuming equipment must be carried out in accordance with the specific requirements that exist for this equipment.


First of all , compliance with the requirements relating to thermoelectric protection must be verified. Now we will explain what is at stake here. Those who have ever seen, this is especially widespread in cases with Economy automation units on domestic gas boilers, where the solenoid valve button is tied with tape or fixed with anything in the pressed position so that the boiler works. The fault here is 90% obvious - the thermocouple is faulty or it has poor contact with the solenoid valve. The thermocouple replacement procedure usually takes 2-3 minutes. But for some reason, no. The button is tied, and when the igniter goes out for any reason (and there are any number of them), the gas flow to the house is always open, as they say, wide open.
Secondly.
Compliance with gas pressure requirements. This is about availability. This applies, you understand, to the operation of the valve on liquefied gas, whether it is a gas tank or cylinders.
At first glance, the requirement is simple, but practice sometimes shows something completely different. Moreover, speech here goes already not even so much about Eurosit 630 gas valves, but about gas valves, for example,.

A small but useful digression

When the specified pressure requirement is not met, do you know what happens? The Sigma 845 gas valve is installed on a huge number of wall and floor gas boilers. Moreover, boilers are not cheap, serious, volatile, with control boards, electric ignition, etc. What we have? Usually this is it. The guys came to do the heating. Done. Do you have to submit a job? Necessary. Boiler, for example, BAXI floor standing. There is a gas tank, there is a gearbox at the outlet. They twist and turn, but no one understands what the output pressure gauge shows. It seems that it should be 2750 Pa or about 300 mm water column, and there the scale is three orders of magnitude rougher than necessary. You can't see anything on this one. The boiler either gives an error "no gas" or does not start at all. Or it will work for half an hour, and then that's it. Who is to blame when "no gas"?
Of course, the gas valve! In the end, do you know what they do? They remove the valve from a completely new boiler, begin to blow there from all sides. It blows from here, it doesn't blow there. The result is complete panic! Buying the most common one with a factory setting of 300 mbar, to the great amazement of everyone, turns out to solve the problem!!! It is clear that Eurosit 630 also applies to such a requirement. But it is non-volatile, there is no board there, it will not give us any errors, but it will affect the consumption. And the flame of the igniter... When you see a column of flame 15 centimeters high FROM THE IGNITER, you will understand what it is about.
It is very important to carefully understand the requirement for gas pressure. Now let's move on to the mechanics.

Mechanical connections

Never damage sealing parts! Never loosen the assembly screws! Avoid shocks, falls, blows to the valve, etc. And further. Never remove labels affixed to the valve! The information that is indicated there is very important for you and me, since a replacement, if anything, then how will we select it? The valves, of course, have differences, but more on that later. It will be next. Remove dust caps only during installation. Make sure the gas flow is in the direction indicated by the arrow on the regulator body. Take care to ensure that no foreign material enters the valve during installation. Especially in all holes, the packaging foam is very fond of climbing. It just sticks to everything!
The factory indicates that some versions of Eurosit 630 can be supplied without certain parts. This note, of course, is primarily written for ourselves, but it won't hurt you to know that either.

So, together we check the availability of the following components in Fig. BUT:
- screw for setting the minimum gas flow - 3
- screw for setting the maximum gas flow (it is sometimes called) - 2
If there are no screws, insert the screws into the corresponding holes 14 and 15.

Gas connection

1. Use 3/8" threaded pipe. It is also possible to connect a tube D12 mm with an O-ring and a nut.
2. The valve has two holes for inlet channels 10 and 12 and two holes for outlet channels 11 and 13. The holes that we do not use must be closed with plugs.

Igniter connection

This is pin 8. A regular igniter with a diameter of D1 / 4 "" is usually wrapped in this hole. This is the usual standard configuration. But it is also possible to insert tubes with a diameter of D4 mm, D6 mm with
cone seals and corresponding nuts. At the end of the work, be sure to check all connections for leaks.

Installation and adjustment options. Full list for professionals

1. We check the inlet and outlet pressure using the gas pressure measurement fittings 6 and 7. After measuring the pressure, close the fittings carefully.
2. Adjustment of the maximum and minimum gas flow rates is performed only with a cold bulb.
3. Setting the maximum gas flow (version without pressure regulator) BUT
Turn knob 4 to position 7. Completely tighten adjustment screw 2, and then gradually unscrew it until the required gas flow is reached. ATTENTION! After full
When tightening, do not back out the screw more than two full turns.
4. Disable the maximum gas flow function. Fully turn the setting screw 2, and then turn it out two turns and fix it. Disconnection can also be done by replacing the screw
settings 2 with a plug. In this case, the plug must be fully screwed on.
5. Setting the maximum gas flow (version with pressure regulator) A. Turn the control knob to position 7. By turning the adjustment screw 2 clockwise, the gas flow
increases.
6. Disable pressure regulator function. Turn the adjustment screw 2 fully clockwise.
7. Setting the minimum gas flow. Slowly turn the control knob clockwise to the minimum power position (as close as possible to the main burner on position).
Turning the adjusting screw 3 counterclockwise increases the gas flow.
8. Setting the gas supply to the igniter. Turning screw 5 clockwise reduces gas flow.
9. Disabling the function of setting the gas supply to the igniter. Fully tighten the adjustment screw 5, and then unscrew it two turns and fix it.
10. Changing the type of gas. Set the gas pressure at the outlet of the reducer or use a ready-made reducer with factory settings. Remember that it is strictly forbidden to break off or flash through the flame at the maximum and minimum gas pressure, respectively.

Repair of the gas valve Eurosit 630

Only one type is allowed by the manufacturer repair work- replacement of the magnetic block. This usually occurs when the thermocouple is fully functional and the entire circuit from
thermostat to the breaker. All other works, and especially works of the class "Kulibin + 0.5 ppm" or "whoever is in what much" are strictly prohibited.

Now about the difference between Eurosit 630 blocks. How do they usually differ from each other?

The blocks differ mainly only in the range of maintaining the temperature regime. The standard mode of operation of gas boilers is from 40C-90C. Although, on boilers with a power of 11.6 kW, there were valves with a temperature maintenance range ranging from 40C to 72C. This does not affect the operation of the boilers in any way, therefore, valve 0630068, which supports the 40C-90C range, practically solves any problem.

For a quick assessment of the situation, we give a list temperature conditions, which may be indicated on the label of your unit. Attention!!! Not to be confused with ambient temperature! Such data is also on the block label. Be careful!

Operating temperature range of Eurosit 630 gas valve: Link to the full one on our website.

The dimensions and data of the threads of the Eurosit 630 block are given below

The gas valve is required to supply gas to the burner device of the unit. By adjusting the gas valve, you can adjust the amount of fuel supplied. This makes it possible to make the unit more economical or increase the power of the device. Thus, the user, depending on the situation, has the opportunity to adjust the performance of his unit.

Most gas appliances have a SIT valve. It includes the following elements:

  • measuring fitting of gas pressure at the outlet of the valve;
  • adjusting screw for minimum and adjusting nut for maximum fuel consumption;
  • lid;
  • inlet pressure gauge.

The gas boiler valve consists of a locking and modulating coil. When voltage of 220 V is applied to the shut-off valve, the minimum volume of gas is supplied to the burner in accordance with the factory settings. The voltage is then transferred to the modulation coil. The processor, depending on the operating mode (power), supplies voltage with a different modulation frequency, adjusting the amount of gas passing per unit of time.

To set the boiler gas valve to minimum power, you will need a differential pressure gauge, a wrench and a screwdriver. The setup process includes the following steps:

  1. Remove the protective cap covering the valve differential screws.
  2. Open the fitting to measure the pressure of the gas supplied to the burner - turn the locking screw counterclockwise by 1.5-2 turns.
  3. Connect the manometer hose to the inlet fitting.
  4. They turn on the heating mode and turn off one wire of the modulating coil - this is necessary so that the valve supplies gas to the burner to a minimum, which will correspond to the minimum power of the unit.
  5. According to the pressure gauge, set the minimum gas pressure on the burner. To do this, rotate the internal screw located under the protective cap. At the same time, the outer nut is fixed.

The dynamic fuel pressure at the inlet of the gas valve is in the range from 1.4 to 2.4 kPa. If the measurements show that the pressure is outside the specified limits, it is necessary to call gas specialists.

It is not necessary to reset the gas valve manually in the factory power range. This is required in order to transfer the unit to a power lower or higher than the indicators stated in the instructions. Often, valve adjustment is needed if the performance of the device does not correspond to the heated area of ​​\u200b\u200bthe house or apartment.

Setting the gas valve when the boiler is "clocked"

Such a problem as the “clocking” of a gas boiler can be solved by adjusting the gas valve. Usually it occurs if the power of the unit significantly exceeds that required for a given area.

To exclude "clocking" of the device in heating mode, it is necessary to reduce the outlet pressure. This is done by turning the adjusting screw counterclockwise.

To stop "clocking" in the DHW mode, reduce the maximum pressure. This is solved by turning the adjusting nut counterclockwise.

However, in more modern models, “clocking” is eliminated by automation. For example, setting the gas valve of the Buderus boiler is done by blocking cycles:

  • hold the button with wrench within 5 sec;
  • select the duration of the intervals from 0 to 15 minutes using the arrow buttons.

It is recommended that adjustments of this kind be carried out only by specialists. service center, especially if the boiler is under warranty. Otherwise, if you damage the valve, the company will void the warranty and you will have to buy a new part.

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 the operation of the gas burner of the 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 of 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 are wall-mounted 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. 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 set up the correct operation of the device.

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 correctly adjust complete combustion 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 atmospheric burner can be adjusted by yourself. 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. The simplest open-type boilers can be configured independently 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.