European gas heating equipment has long become not only competitive in the world market, but also has taken leading positions in some countries. For example, Czech gas boilers Proterm Cheetah are popular in Europe and the countries of the former USSR.

Operating principle and technical features of the equipment

Residual products formed as a result of gas combustion are discharged through a coaxial chimney, supplied complete with the gas boiler Proterm Gepard 23 MTV, or purchased separately. Oxygen flow into closed chamber combustion is performed compulsory system ventilation through the external channel of the coaxial chimney.

For the necessary monitoring and control of the boiler, a small LCD display is provided, located on the front surface. The display clearly shows the current working programm and additional indicators tracking normal work all components during self-diagnosis. These include:

1. Protection against freezing of the coolant in the boiler, automatically turning on the circulation pump and burner when the temperature drops below the set parameters.
2. Overheating protection helps protect the boiler gas Protherm Cheetah 23 MTV from burnout of the firebox.
3. Control of gas combustion in the combustion chamber, automatically turning off the gas supply if the burner goes out.
4. A draft sensor that turns off the gas supply to the boiler in the event of absence or unstable draft.

The modulation burner makes it possible to smoothly regulate the heating of water and coolant; the load on both circuits can be changed separately. An increase in power and switching of boiler operating modes to DHW occurs as soon as the tap opens hot water. The boiler is capable of supplying up to 11 liters of water per minute, heated to a temperature of +60C, provided that the temperature of the incoming water is around +30C.

If necessary, wall gas Protherm boilers Cheetah 23 MTV can be equipped with a climate control system and weather-dependent equipment that can automatically change the heating temperature when environmental weather conditions change.

Advantages and disadvantages

1. Natural or household gas is a relatively cheap type of fuel, available in any region through central gas distribution lines or pumped into cylinders and.
2. The level of harmful emissions is minimal and mainly consists of carbon dioxide.
3. The compact dimensions of the equipment allow it to be installed in rooms with limited space.
4. Full automation of work processes makes it possible for equipment to operate without human intervention for a long time.
5. Built-in security systems provide reliable operation boiler throughout its entire operational life.

Simplified model

For heating and hot water supply of apartments and small private houses with one bathroom, double-circuit gas boilers are usually used.

In large houses with several sanitary facilities For heating, single-circuit gas boilers with storage boiler for preparing hot water. This system provides more comfortable use of hot water in the house.

A double-circuit gas boiler is installed in the apartment of a new building with apartment heating Protherm Gepard 23 MTV. Next, let's look at setting the boiler power using this apartment as an example.

Gas boilers Protherm Gepard series (Cheetah) are almost complete analogue(a simpler version) of Protherm Panther boilers. This article describes in detail the adjustment and power settings of gas boilers Protherm Gepard and Protherm Panther.

It should be noted that the company that produces Protherm series boilers at its other plant produces gas boilers of the famous Vaillant brand. Gas Vaillant boilers are in a higher price category due to the use of more quality materials for the manufacture of heat exchangers. But according to the design, other parts used, settings service menu Vaillant brand gas boilers are very similar to Protherm boilers.

The principles of adjustment and power settings described in this article Suitable for many other gas boilers brands and manufacturers.

Internal structure of a dual-circuit gas boiler Protherm Gepard 23 MTV and Panther 25,30 KTV (Panther)

Reasons for clocking (pulse operation) of the boiler in heating mode

The operating manual states that the useful thermal power of the Protherm Gepard 23 MTV boiler is regulated within the range from a maximum of 23.3 kW. to minimum 8.5 kW. The factory setting for power in heating mode is set to 15 kW.

The total area of ​​the apartment heated by the boiler is 60 m 2. To heat the apartment, heating devices (radiators) with a total maximum thermal power of 4 are installed kW.

How to determine the maximum thermal power of a heating circuit in a house or apartment

How to determine the maximum thermal power heating circuit? On the websites of radiator manufacturers and sellers we find the thermal power of each radiator installed in the house. In manufacturers' catalogs, the heat transfer of radiators is presented in 2 modes: 1) 90/70/20 degrees and 2) 75/65/20. You need to look at the heat transfer according to the “75-65/20” parameter. The sum of the powers of all radiators connected to the boiler will be equal to the maximum thermal power of the heating circuit. For the apartment from our example, this value turned out to be 4 kW.

The installers installed the boiler and put it into operation, “forgetting” to do commissioning works. The boiler was started to work with the factory setting of maximum power in heating mode 15 kW.

Obviously, a heating system with a maximum power of only 4 kW., will not be able to accept what is produced by the boiler thermal energy power 15 kW. The power of the boiler burner is controlled automatically within certain limits. But there is a huge difference in the power of the boiler and heating devices leads to the fact that the boiler automation is not able to bring the boiler power in line with the needs of the heating system without additional settings.

The large difference between the power of a gas boiler and the power of heating devices, among other disadvantages, leads to cyclical operation of the boiler.

By the way, about other disadvantages of an overly powerful boiler. The service instructions for the Protherm Gepard 23 MTV boiler indicate its efficiency in heating mode: 93.2% at maximum thermal power (23.3 kW.) and 79.4% when operating at minimum power (8.5 kW.) Imagine how the efficiency will further decrease if this boiler has to work with a heating system with a power of 4 kW. Please note that a double-circuit boiler throughout the year most time works in heating mode, with minimum power. At least 1/4 of the gas spent on heating will literally fly uselessly down the chimney. This will be the price to pay for installing overly powerful heating and hot water equipment in the house.

Tips on the topic “How to increase the efficiency of a gas boiler” can be found if you read this article to the end.

Excessive cyclicality, impulsiveness of work or, as people say, “clocking the boiler” manifests itself in the fact that the boiler burner, after being turned on, quickly turns off when the set temperature is reached in the straight pipe at the outlet of the boiler. But the radiators remain not heated to this set temperature - the water heated in the boiler simply does not have time to reach the heating devices. That is, the boiler produces more thermal energy per unit time than a less powerful heating circuit is capable of receiving. Therefore, the temperature of the water leaving the boiler rises quickly and it turns off earlier, without having time to heat the radiators.

After a short time, the circulation pump supplies the heat exchanger with the remaining cool water from the heating system return pipe and the burner turns on again. Then everything repeats again.

A high-power heating system has an increased pipe diameter and radiator volume, which means less hydraulic resistance. In larger systems, water does not flow exactly the same, it flows faster, at a higher flow rate (liters per second). During the rapid passage through the boiler heat exchanger, each liter of water only manages to heat up by 15-20 degrees o C. And in order to heat this liter to a given temperature, the water in the heating system must pass through the heat exchanger several times.

For heating systems low power the pipes are thinner, the radiators are smaller, the hydraulic resistance is higher and the water flows slower. If you heat slowly flowing water with the same power, then the water entering the heat exchanger immediately, at one time, will heat up by 40-60 degrees o C, immediately before maximum temperature, and the boiler will turn off. And the water remaining in the system, which has not reached the boiler, will remain cold until the next clock cycle. This is what happens in the boiler if its power is not adapted to the heating system.

The size of the flame (burner power) in the boiler is controlled electronically using a complex algorithm, which takes into account the time from the start of the burner, the temperature value, the rate of temperature change in the heating circuit, and the temperature difference in direct and return pipe. I don’t know all the intricacies of the regulation algorithm, but automation, without additional service settings, does not ensure normal operation of the boiler at a power below the minimum specified in the technical specifications.

In a properly configured heating system, the temperature difference in the forward and return pipes should be no more than 20 o C.

Clocking reduces the service life of the boiler and increases gas consumption

Any person, even without being a mechanic or electrician, knows that the most difficult operating mode for equipment is the moment of startup, turning on mechanical and electrical equipment. During the start-up period, the greatest wear is observed, and failures most often occur. An increase in the number of starts as a result of cyclicity consumes the operating life of very expensive parts of the boiler the most - gas and three-way valves, circulation pump, exhaust gas fan.

To ignite at the moment of starting, the maximum amount of gas is supplied to the burner. Part of the gas, before the flame appears, literally flies into the pipe. Constantly “re-igniting” the burner further increases gas consumption and reduces the efficiency of the boiler.

Some cyclical operation of a gas boiler is provided for by its normal operating mode. For example, regulating the temperature in a room without a thermostat or using a two-position thermostat occurs by periodically turning on and off the boiler burner.

The task of regulating boiler power is to eliminate excessive cycling - clocking caused by a lack of adaptation of the boiler settings to the heating system.

To eliminate boiler clocking, it is necessary to equalize the power of the boiler and the heating circuit

You can do this in two ways:

1. Reduce the boiler burner power to a level at which the automation can ensure normal operation of the boiler with the connected heating system.
2. Increase the maximum power of the heating circuit by installing additional radiators or replacing existing ones with more powerful ones.

You can use both methods at once. Reduce the difference between the power of the boiler and the heating circuit by replacing and installing more powerful radiators. And then, compensate for the remaining difference by adjusting the boiler power.

The second method is more expensive, but sometimes you have to choose it. The fact is that, in order to save money, builders often install radiators in the house without a reserve of thermal power. As a result, to maintain indoors required temperature, in cold weather it is necessary to supply heating water to the radiators at a maximum temperature of more than 75 o C. At this temperature, decomposition (combustion) of organic dust particles occurs on the radiators and appears in the rooms. bad smell. Besides, heat coolant reduces the service life of polymer pipes and other parts of the heating system made of plastic and rubber.

Sometimes, the power of radiators is simply not enough to maintain the required thermal regime even at maximum temperature heating water. Before adjusting the boiler power, I recommend determining the need, and, if necessary, increasing the power of the radiators by 30 - 100%, at least in the coldest rooms.

The main advantage of low temperature heating is the possibility of using modern technologies. This is about condensing boilers, solar collectors and heat pumps. They require that the system have low temperature heating water.

When replacing radiators, it is necessary to take into account that the expansion tank built into the boiler is designed for a volume of water in the heating system of no more than 50 liters for a Gepard boiler, and 70 liters for a Panther. If the amount of water as a result of installing new radiators turns out to be greater, then it is necessary to install an external expansion tank.

The external expansion tank is connected to the return line of the heating system closer to the boiler. In this case, it is better to disable the built-in expansion tank.

Buy radiators in your city

Heating radiators

How to regulate the burner power of a gas boiler

The useful thermal output of a gas boiler can be reduced by reducing the gas supply to the burner. They do this by changing the gas valve settings.

Honeywell gas valve for Protherm Gepard (Panther) boiler - operating diagram.
EVS1— safety electric valve; EVS2— electric drive of the control valve; Vm— a stepper motor controls gas flow through a control valve.

IN modern boilers"Protherm Gepard" and "Protherm Panther" basic settings gas valve from Honeywell changed using a stepper motor. The stepper motor is controlled from the boiler control panel through the service menu.

It should be noted that the manufacturer in some versions of gas boilers Protherm Gepard (Panther), Vaillant, instead of a Honeywell gas valve, sets gas valve SIT 845 Sigma. The maximum and minimum burner power settings for this valve are made by rotating the adjusting screws located on the valve body. Read about the features of adjusting the SIT gas valve below, on page 2.

Electromechanical devices of the boiler (electric valves, stepper and conventional electric motors, sensors) are controlled by a microprocessor electronic board control in accordance with the established program. The boiler operating program settings can be changed on the control panel using two menus - a public user menu and a hidden service menu.

Access to the service menu of the Protherm Gepard boiler

The Protherm Gepard boiler is controlled from the control panel through a publicly accessible user menu. How the owner can operate the boiler is described in the operating manual.

On the control panel you can call up another, hidden menu - a service menu intended for specialists. The service menu becomes available on the display screen after entering the code.

Press and hold the mode button (1) for about 7 seconds; the display will change - a number will appear 0 . — Using buttons + or — (2), enter code, number 35 . — Confirm entering the code by pressing the mode button (1). After this, the display will show the first line of the menu in the form of symbols alternating on the screen: d. 0.

— Using buttons + or — d.**.

- Press the "mode" button to move from the menu bar number designation " d.**» to the parameter value (the “=” symbol and the parameter value are alternately displayed on the display). — Change the values ​​of the displayed parameters using the + or — buttons (3) on the boiler panel. — 3 seconds after the change, the new values ​​are automatically confirmed. To return the display to its original state, press the “mode” button for 3 seconds. After 15 minutes of inactivity, the display returns to operating mode on its own.

Access to the service menu of the Protherm Panther boiler (Panther)

The control panel of the Protherm Panther boiler has some differences from the Protherm Gepard boiler. The boiler control panel has a hidden service menu, which becomes accessible when the code is entered.

To access the service menu of the Protherm Panther boiler, you must: Press and hold the mode button (1) for about 7 seconds; The display appearance will change. - By using buttons on the left + or — (2), enter the access code into the service menu - number 35 in the left half of the display. — Confirm entering the code by pressing the mode button (1).

After this, the display will show the 1st line of the menu in the form of symbols d.00 with the menu line number in the left half of the display, and numeric value line parameter - in the right half of the display. - By using buttons on the left + or — (2), enter the number with the required menu bar number: d.**.

To change the value of an option in the menu bar:— Change the values ​​of the displayed line parameters using buttons on the right + or — (3) on the boiler panel. — 3 seconds after the change, the new values ​​are automatically confirmed. To return the display to its original state, press the “mode” button for 3 seconds. After 15 minutes of inactivity, the display returns to operating mode on its own.

The service menu commands and the procedure for setting the power of the Protherm Panther boiler are similar to those given for the Protherm Gepard boiler.

Description of some service menu commands

Line d.00— maximum heating output (net power) of the boiler in heating mode, kW. Range possible values parameter from =9 to =23, factory setting = 15 (for Protherm Gepard).

Line d.01— run-on time of the circulation pump in heating mode, min., select a value between 2 and 60 min. Factory setting =5

Line d.02— Time delay after operation in heating mode for anti-cycling, min. Protects against frequent switching on and off of the burner in heating mode (this function is not applicable in DHW mode). Choose a value between 2 and 60 min. Factory setting = 20 minutes. This delay (called anti-cycling time) prevents a rapid restart in heating mode after the burner has stopped due to the set temperature or the room thermostat TA. It depends on the coolant temperature setting: - at 80 °C, it is set to 1 minute and is not adjustable. - at 20 °C, it can be adjusted from 1 to 60 minutes using the parameter d.02 in the service menu. At intermediate temperatures, between 20 °C and 80 °C, the delay value changes proportionally in the range from 1 min. up to set in d.02 parameter.

Dependence of anti-cycling time on the parameter value setting in the line d.02 and heating temperatures

Line d.18— operating mode of the circulation pump; Operating mode options: = 0 - with burner: the pump operates together with the burner. =1 - continuous; with RT thermostat: the pump is activated by the command of the room thermostat. =2 - constantly in winter: the pump runs all the time while the boiler is in WINTER mode. Factory setting =1.

Line d.19— speed of the circulation pump; Operating mode options: =0 - burner is running; speed in heating mode is selected automatically, maximum - in DHW mode, minimum - if the burner is turned off = 1 - min. speed in heating mode, max. – in DHW mode =2 – automatically selected in heating mode, max. – in DHW mode =3 — max. speed in heating and hot water mode. Factory setting =2. Each time the burner is started in heating mode, the pump is switched on at a limited speed for at least 30 seconds. If the temperature difference between supply and return reaches 20 OK, the pump switches to maximum speed until the burner switches off (even if the temperature difference has decreased). The same cycle occurs at the next ignition.

Line d.35— shows the position of the 3-way valve, heating/DHW (read only); =99 - hot water =0 - heating =40 - middle position

Line d.36— shows on the display the hot water consumption measured by the flow sensor, l/min. when dispensing hot water (read only)

Line d.40- shows on the display the temperature of the water leaving the boiler in the direct pipeline of the heating system, o C. (only for reading)

Line d.41- shows on the display the temperature of the water at the inlet to the boiler, in the return pipe of the heating system, o C. (only for reading)

Line d.44 — Ionization current control. This parameter informs that the ionization current is in optimal range. The displayed value does not represent the actual current value! Range of values: 0 – 10. In the range: =0 – 4 – ionization current is sufficient – ​​flame is present; =4 – 8 – ionization current is slightly below a sufficient level – there is a possibility of flame loss; =8 – 10 – ionization current does not correspond to a sufficient level – there is no flame.

Line d.52— setting the minimum power of the boiler burner by shifting the minimum position of the Honeywell gas valve stepper motor. The range of possible parameter values ​​is from =0 to =99. How less value parameter, the weaker the intensity of gas combustion.

Line d.53— setting the maximum power of the boiler burner by shifting the maximum position of the Honeywell gas valve stepper motor. The range of possible parameter values ​​is from =0 to =-99 (negative values ​​with a minus sign). The lower the parameter value, the weaker the intensity of gas combustion.

Line d.62- lowering the heating temperature at night. Setting range 0 - 30 o C. If you connect a timer or even a manual switch to the boiler, you can switch the boiler into two modes: day or night. In night mode, the heating temperature setting is reduced by the amount set in d.62. Those. During the day, the temperature of the heating water and the temperature in the house are higher, and at night lower. You can set it the other way around.

Line d.67 — Displays the time between boiler starts. This parameter displays the cooling time in minutes before the boiler is turned on again. The countdown of minutes begins at the moment the boiler turns off due to exceeding the maximum set operating temperature of the heating water on the boiler control panel and the room regulator is permanently closed. This parameter is important for the anti-cyclic function of the boiler when the cooling time reaches next switch on is calculated based on the set boiler heating water temperature and the set anti-cycling time interval in line d.02.

Line d.70 — Setting the position of the three-way valve. In this mode, it is possible to set the position of the three-way valve, regardless of the heating requirements for a particular circuit. Three-way valve position: =0 - the valve is controlled based on standard requirements from the control system; =1 - three-way valve is set to the middle position to empty the boiler (both heating and domestic hot water); =2 - the three-way valve is set to the heating position of the extract air.

Line d.71— Setting the maximum temperature in the heating system. Select a value from =45 to =80 °C. Factory setting =75 °C.

Line d.88 — Water hammer protection in cold water distribution (for KTV and KOV boilers). The ability to change the parameter eliminates the reaction to water hammer, which in some cases occurs in cold water pipelines. For example, at the moment of closing an automatic valve in cistern toilet (or washing machine, or dishwasher) a pressure surge (water hammer) may occur in the water supply pipes. The consequence of this may be false alarm flow sensor (turbine) of tap water, which will lead to short-term unwanted activation of the boiler DHW mode. Factory setting =0 - activation of the ignition process for heating tap water at a flow rate of 1.5 l/min. Changing the parameter to value =1 - activation of the ignition process for heating tap water at a flow rate of 3.7 l/min. In this case, the flow duration should be at least 2 seconds.

Line d.90 — Identification of the connected room sensor. By using this parameter It is possible to verify that the room regulator is connected correctly, or that the connection between the room regulator and the boiler is working properly. Please note: this description only applies to controllers that support eBus communication. If a conventional regulator with a switching relay was connected, this function not possible to use. Display: =0 - the regulator is not connected or does not communicate with the boiler; =1 - the regulator is connected and there is communication between it and the boiler.

Line d.96— Setting the boiler to the parameters set at the factory. If the settings lead to incorrect operation or failures, it is possible to restore the boiler to factory settings. Setting: =0 - replacement with factory settings will not be performed; =1 - a return to factory settings will be made Note: when entering the setting of this parameter, the display always shows parameter “0”

How to eliminate boiler clocking in heating mode

Adjusting the maximum heating power of a Gepard or Panther boiler through the service menu

At the first stage in the service menu, as described above, we find the line d.0, press the “mode” button and look at the value of the boiler power parameter on the display, kW. In our example, the factory setting =15 was visible. It is necessary to set a new boiler power value, equal to power heating devices connected to the boiler. This setting will only work in heating mode.

If the power of the heating system corresponds to the operating range of boiler power

The maximum power of the heating system in the house may fall within the operating power range of the boiler specified in the instructions. For example, general maximum power There are 11 radiators in the house kW. The operating power range of the Protherm Gepard 23 MTV boiler is within 8.5 - 23.3 kW.

In the service menu, as described above, find line d.0, press the “mode” button and look at the value of the boiler power parameter on the display, kW. For example, the factory setting =15 will be visible. Using the “-” button we set the new boiler power value = 11.

I recommend trying to set the boiler power to 20 - 30% less than the heating circuit power, for example, d.00 =9 kW. This power should be enough to compensate for heat losses at home, since the power of radiators is usually chosen with some reserve.

Increasing the anticycling time

At the second stage, increase the anticycling time in the line d.02 service menu.

Factory setting d.02 = 20 minutes. According to the graph (see above) we determine that, for the heating water temperature specified on the display, 70 o C, restarting the burner is possible after 4 - 5 minutes, not earlier.

In line d.02 we set a new value for the anticycling time, for our example the maximum possible = 60 minutes. Line d.67 displays the time in minutes until the boiler is turned on again. Breaks in burner operation became approximately 10 minutes long. Twice as much as with the factory setting, which is still too often.

Increasing the anti-cycling time results in the burner turning on later, at a lower heating water temperature. The heat flow from the boiler to the heating circuit is reduced.

Thus, selecting the settings of the boiler power and anti-cycling time through the service menu, ensure that the cycle time between turning on the boiler burner is at least 15 minutes. That is, the boiler should be turned on no more than four times within one hour.

I note that not all brands of gas boilers have the ability to adjust the anti-cycling time. In this case, you only have to select the boiler power settings.

On some brands of gas boilers, the rotation speed (performance) of the circulation pump is set manually using a switch on the pump. To reduce the boiler clock, it is recommended to increase the pump speed.

Setting up a Gepard or Panther gas boiler for power below the minimum

At the third stage setup is in progress minimum boiler power, by an amount lower than specified in the instructions.

Such adjustment is not necessary in all cases, but only when the first and second stages do not bring the required result. As in our case, when at the first stage we use the “-” button to set a new boiler power value = 9 (the minimum possible setting corresponds to 8.5 kW.). The newly set maximum boiler heating power (8.5 kW) is still very different from the power of heating devices (4 kW).

It should be noted that adjusting the boiler power using the method described below can be useful in other cases, as it allows you to adjust the heating power boiler in accordance with the actual power of the heating circuit. The actual power is usually less than the calculated one.

Before carrying out work for setting the minimum burner power, necessary:

• Fully open thermostatic and other valves on radiators, and room thermostat set to maximum temperature. The thermostat that controls the heated floors is set to the maximum permissible temperature so as not to overheat the floors.
• In the custom menu of the boiler, set the maximum operating temperature, which is set by the owners in the coldest weather, adding another +5 °C. Usually it is not less than 65 °C. If the owners do not remember it, or on the new boiler in the menu they set the factory setting for the maximum temperature of 75 °C. The boiler burner will have to switch off automatically at a temperature of 5 °C more, i.e. at 80 °C.
• Cool the heating circuit to a heating water temperature below 30 °C.

Next, start the burner in heating mode, select the line in the service menu d.52, press the “mode” button and see on the display the value of the gas valve stepper motor position parameter in the factory minimum power mode.

By removing the front cover of the boiler, we visually observe the size of the flame in the burner. In our example, the factory setting was displayed on the display, the number = 72, and the flame height in the burner was quite high.

Use the “-” button to set a new parameter value in the line d.52, for example =20. 3 seconds after the change, when the new value is automatically confirmed, we observe a significant decrease in the flame height in the burner. This indicates that the useful power of the boiler with the specified setting will be greatly reduced.

Next, observe on the display the increase in temperature in the direct heating pipeline at the outlet of the boiler. Typically, the temperature increase stops when it reaches some value less than the set value, for example 52 °C. The boiler is running, but the temperature does not increase (or changes very, very slowly). This means that a power balance has been achieved between the boiler and the heating system at this established water temperature. At this moment, we increase the parameter in line d.52 of the service menu, set a new value = 30 - the temperature begins to rise again and stops again, for example at 63 °C. Again we add the parameter value in line d.52 =35 and so select the parameter until the temperature stops at a value slightly higher than the maximum, for example 77 °C. In this way, a balance is achieved between the power of the boiler and the heating circuit at maximum operating temperature. The boiler power will be set to the minimum level required to operate with the connected heating circuit. In this case, the cyclic operation of the boiler will be minimal.

If the radiators do not warm up well in height, the temperature difference in the forward and return pipes at a maximum temperature is more than 15-20°, then increase the response pressure of the bypass valve. Read below on how to adjust the bypass valve. The water temperature in the forward and return pipelines can be seen on the display if you enter the service menu, lines d.40 and d.41.

In case of adjusting the bypass valve, the gas valve setting in line d.52 must be repeated.

In our example, the burner heated the water to a maximum temperature of 77 o C at the minimum value of the parameter in the line d.52, equal to =28 (factory setting was =72). With a lower parameter value, the burner could not heat the water to the specified temperature. And when higher value the burner heated the water to 80 o C and the boiler automatic switched off the combustion.

It should be noted that the method described above for adjusting the gas valve, which allows you to balance the boiler power with the power of the heating circuit through an experiment, is not included in the recommendations of the boiler manufacturer. This is the idea of ​​the author of the article, successfully implemented when setting up autonomous heating systems with gas boilers.

Factory calibrated gas valve

The boiler manufacturer specifies Calibrate the minimum power on the gas valve as follows:

In line d.00 of the service menu, set parameter =9, which limits the boiler power to the minimum level specified in the instructions. Turn on the boiler in heating mode.

A pressure gauge tube is connected to the upper fitting at the gas valve outlet. Before connecting, it is necessary to unscrew the locking screw on the fitting 1-2 turns.

Call line d.52 service menu. And changing with buttons + And — string parameter value d.52, set the gas valve outlet to the minimum pressure specified in the boiler operating manual. For example, for a Gepard 23 MTV boiler, the minimum pressure in front of the burner is 1.5 mbar or 15.5 mm.water.st..

This setting will ensure the boiler operates with the minimum power specified by the manufacturer - 8.5 kW. To answer the obvious question, what to do if the power of the heating circuit connected to the boiler is less, service instructions The boiler manufacturer does not provide an answer.

In our example, after setting up and installing in the line d.52 parameter =28, measuring the pressure at the outlet of the gas valve in front of the burner showed a value of 4 mm.water column

Readers in the comments ask the question: “Isn’t such a significant decrease in gas pressure on the burner dangerous for the boiler?” Boilers have many different protections, but there is no protection against low gas pressure on the burner. From this we conclude that low pressure in itself is not dangerous for the boiler. It is important to ensure stable ignition and stable combustion of gas, since the boilers have appropriate protection.

A home technician can roughly assess whether the gas valve settings correspond to the factory settings without resorting to measuring the gas pressure on the valve.

To do this, set parameter =9 in line d.00 of the menu and turn on the boiler in the minimum heating power mode. Record readings gas meter. After 15 minutes (1/4 hour), the meter readings are recorded again and the gas consumption during this time is determined. For example, we determined the gas consumption from the meter to be 0.289 m 3 /15 min. Multiply this value by 4 and get gas consumption per 1 hour in minimum power mode 1.156 m 3 /hour. Compare the obtained value with the data from the factory instructions. For example, standard flow rate gas in minimum power mode for the Cheetah 23 boiler MTV is 1.15 m 3 /hour. Gas consumption according to the meter readings approximately corresponds to the factory norm. We conclude that setting the gas valve in minimum power mode meets the requirements of the factory instructions. If not, then the gas consumption is adjusted by changing the parameter in line d.52.

Similarly, based on gas consumption, you can evaluate the setting of the gas valve at maximum power by switching the boiler to DHW mode.

Power 23.3 kW. corresponds to the maximum pressure at the valve outlet 85 mm.water column

U-shaped pressure gauge

A simple pressure gauge for measuring a gas valve can be made from a clear plastic tube, filled with water and bent into a U shape. One end of the tube is placed over the valve fitting and the other is left open. A ruler is used to measure the difference in water levels in the branches of the tube. The measured distance will be equal to the pressure in millimeters of water column - mm.water.st..

A tube with an internal diameter of 8 can be tightly pulled onto the gas valve fitting. mm. For a tube of a different diameter you will have to select an adapter.

At the end of the measurements, do not forget to carefully tighten the screw on the measuring fitting and check its tightness.

Wall-mounted gas boiler Proterm Cheetah, reviews from owners that help everyone potential buyers It’s better to decide on the choice of a mounted gas appliance; it firmly occupies a high place in the ratings of heating equipment.

Modern design and quality of materials, compact dimensions and a maximum range of all necessary functions have made the “Gepard” model a kind of flagship in the line of mounted double-circuit gas boilers from the Slovak company “”.

I propose to analyze in more detail the device and the differences between the models, specifications and prices for gas boilers Protherm Gepard 23 MTV and MOV, the operating instructions for which will help us review the devices of the Slovak manufacturer.

Features of wall-mounted double-circuit gas boilers Protherm Gepard MTV and MOV

Like any European manufacturer of mounted gas boilers, the Proterm company produces several models in the Gepard line. Let's figure out how they differ and what makes them special.

Gas boilers Proterm Gepard

Double-circuit gas boilers "Gepard" are produced only in Slovakia and only in two versions:

— with a closed combustion chamber Gepard MTV;
— with an open chamber (atmospheric) Gepard MOV.

Until 2015, devices in this series had a display small size, and the power of the produced boilers was 11 and 23 kW. Since 2015, the company has modernized wall-mounted boilers Gepard series, replacing the digital display with a brighter and more informative one, installing a new hydraulic group of higher quality composite materials and an improved SIT gas valve.

In addition, the power of the new boilers became 12 and 23 kW. For example, the Protherm Gepard 23 MTV gas boiler is a double-circuit gas boiler with a closed combustion chamber (with a turbine) with a power of 23-24 kW, and the Protherm Gepard 12 MOV boiler is a double-circuit gas boiler with an open combustion chamber (natural draft) with a power of 12 kW.

Gas boiler Prothem Gepard 23 MTV: instructions and device

This unit with two heat exchangers includes a reliable two-speed circulation pump Grundfos, pneumatic gas valve SIT, the gas burner of the boiler is made of chromium-nickel steel, a membrane expansion tank of 5 liters.

Let's look at the photo diagram of the device and connection of the gas mounted boiler "Protherm Gepard 23 MTV".

Protherm Gepard 23 MTV

Dual-circuit mounted boilers heating Protherm Gepard 12 and 23 MTV with a closed combustion chamber and forced draft can be used either with a 60/100 mm coaxial pipe “pipe in pipe” through the wall, or with a separate pipe system through a chimney duct separator - an 80/80 mm adapter.

A modern information LCD display reflects the user-set temperature in the heating and hot water circuits. In addition, it shows various error codes in case of malfunctions or breakdowns of the device. It is possible to enable the economical “Eco” mode on the control panel, in which the temperature will not exceed 50 degrees, as well as the “warm floors” mode.

A room thermostat for setting the operating mode of the unit depending on the air temperature in the house is not included in the package of the “wall unit”, but is an option that can be purchased and connected separately.

The circulation pump has an automatic air vent and a post-circulation function that protects the pump from jamming. The hydraulic group of the Gepard 2015 boiler is made of higher quality materials than those of the devices of the previous series. Let's take a closer look at it.

Hydraulic group of the Proterm Gepard boiler

Gepard gas boilers are equipped with electric ignition, gas burner with its smooth modulation and a three-way valve that automatically regulates the heating of water in the unit, depending on its operating circuit. Installed temperature sensors NTS, draft sensor, as well as protection against overheating and freezing of the heating system.

Gas boilers Protherm Gepard MTV: technical characteristics, gas consumption, dimensions

Proterm Gepard gas boilers have fairly compact dimensions: 740/310/410 mm. Connecting the DHW circuit using threaded fittings with a diameter of 1/2′, and the heating and gas circuits using 3/4′. The productivity of running hot water is 11.4 l/min.

Atmospheric boilers with an open combustion chamber “Gepard 12 and 23 MOV” with a chimney diameter of 130 mm. Natural gas consumption for models with a maximum power of 23 kW is 2.9 m3/hour, and liquefied gas consumption is 2.1 kg/hour.

Gas boilers Protherm Gepard: technical characteristics

— European assembly;
— high quality components;
— modern set functions;
— informative display with anti-glare;
— a network of service centers.

Disadvantages of gas boilers Proterm Gepard:

— hydraulic group made of plastic;
— small volume of expansion tank;
— high price from 40,000 rubles;
— a two-year guarantee is valid only if the boiler is installed by specialists with certificates from Protherm.

Gas boilers Protherm Gepard 23 MTV and MOV, reviews are often positive, both from owners and specialists. Today we examined in detail the technical characteristics and design features of the Gepard 23 MTV boiler, using the operating instructions and information from the company’s official website. The device has many advantages and some disadvantages, which we also focused on. Let's watch the video.

• Description
• Characteristics
• Documentation
• Reviews 2
• Where can I buy

Advantages:

burner automatic ignition system;

flame modulator;

room thermostat;

system self-diagnosis;

Equipment:

gas boiler PROTHERM CHEETH 23 MTV.

Description

Gas boiler PROTHERM 23 MOV CHEETAH

PROTHERM wall-mounted boiler CHEETAH MOV 23 uses natural or liquefied gas as fuel. This model designed for heating (radiators and underfloor heating system) and preparing hot water for household needs. An open combustion chamber does not require the installation of a chimney, only forced ventilation, since it uses air directly from the room. The wall-mounted installation option and compact dimensions allow you to choose the PROTHERM GEPARD 23 MOV boiler even for small rooms, for example, a kitchen.

Advantages:

there is a device start indicator;

burner automatic ignition system;

flame modulator;

clear control panel with digital display;

built-in temperature sensor;

room thermostat;

system self-diagnosis;

anti-freeze system and overheating protection;

protection of the pump from blocking.

Equipment:

gas boiler PROTHERM CHEETH 23 MOV;

instruction manual and technical data sheet.

This model doesn't fit? We recommend paying attention to its analogue - gas boiler PROTHERM CHEETH 23 MTV.

Gas wall-mounted boiler PROTHERM CHEETH 23 MOV can be purchased at affordable price in the Bigam online store. We have various ways Payment: cash and bank transfer. Delivery is carried out transport companies, by courier or by the client, if there is our store in your city. Also available full list services service center: from warranty service to repair and sale of necessary spare parts.

Characteristics

With the onset of winter, you really want more comfort and warmth in your home. But property owners are also pleased with the modest electricity bill. If you install a gas boiler in your home, you will be able to enjoy its power and energy efficiency. However, the store today offers a huge variety of such devices, and to make right choice sometimes it can be quite difficult. Among others, you will find Gepard gas boilers, which have been known to Russian consumers for many years. This equipment is inexpensive, high-quality, and also belongs to the middle class and has European quality. You can verify this by reading the characteristics presented below.

Characteristics

Gas boilers "Gepard" of a double-circuit type are used for heating and providing housing with hot water supply. The liquid is heated separately, sanitary water goes into the radiators and bathroom, while drinking water goes into the kitchen. The system has a built-in water heater, the volume of which can range from 30 to 60 liters. If there are several water intake points in the house, then a larger volume of liquid is consumed, in this case it is best to install the second option.

Single-circuit gas boilers "Gepard" have a maximum flow rate of heated water without unnecessary load. The designs use room regulators temperature, and the heating fluid and water supply system are heated separately. Among the manufacturer’s popular models is the Protherm “Panther 25 KTV”. This wall hardware, the maximum power of which is 24.6 kW. The device has a closed combustion chamber and costs 33,600 rubles. If we are talking about the Protherm “Cheetah 23 MTV” model, then its maximum power is 23.3 kW, and the cost is 27,600 rubles. The "Cheetah" series is represented by both closed and open cameras combustion. The first version of boilers can be installed in a room where there is no chimney. This is ensured by a coaxial system, through which gases are removed.

Reviews of the boiler "Proterm Gepard 23 MTV"

If you are interested in Cheetah gas boilers, then you can pay attention to the characteristics of the model mentioned in the subtitle. Installation in an apartment will take a minimum amount of time and money, the equipment will be able to support comfortable temperature. Heating is carried out within the range from 38 to 60 °C for hot water supply, and from 38 to 80 °C for the heating system. According to buyers, the design reacts quite sensitively to hard water, so it is best to take care of the cleanliness of the liquid. For this purpose, a filter is installed. Buyers also like what's on sale. this equipment no extra charges, so you can purchase devices at a minimal cost.

Boiler installation

Gas boilers "Cheetah", reviews of which you were able to read above, must be installed taking into account the requirements; they require an area that must be equal to 4 m2 or more. The ceiling height should be 2.5 m. The door width should be equivalent to 80 cm, the unit should be illuminated through openings. The presence of window openings is also stipulated by the rules. For every 10 m2 of room there must be at least 0.3 m2 of windows. When installing a Proterm Gepard gas boiler, it is important to ensure good ventilation in the room, because gas combustion is ensured by fresh air. The area of ​​the opening for oxygen supply should be equivalent to 8 cm 2 for each kilowatt of power. The pipes through which gas will be transported must be made of metal. Flexible hoses are used only for connecting consumers.

The power supply system of the equipment must have a circuit breaker with thermal protection. Gas equipment must be located in basement private residential building. If we are talking about multi-story apartment building, then a gas boiler cannot be placed in the basement. The Proterm Cheetah gas boiler must be equipped with a meter. It should be kept at least 20 cm away from it, this also applies to flammable materials. Depending on the power of the equipment, the distance between the wall and the boiler can be from 30 to 50 cm.

Boiler structure

The gas boiler "Gepard 23" consists of a housing, inside of which there is a combustion chamber. The outside of its walls are covered with insulating material. At the bottom there is a gas burner device and an igniter. On top is the main heat exchanger made of heat-resistant steel or cast iron, through which the coolant passes. The secondary heat exchanger is located outside the combustion chambers. An automatic element is installed in front of the burner, which includes a gas valve and a thermostatic regulator. To mix and distribute water flows, it is used. In addition to the main equipment, the device is equipped with a circulation pump, an expansion tank and a fan for forced supply of fresh air.

Main boiler malfunctions

The Cheetah gas boiler, the price of which was mentioned above, may encounter some malfunctions during operation. For example, error f28 on the display indicates that the ignition attempt was unsuccessful. The injectors should be blown out and the gas supply checked. After this, you need to try to re-ignite. But if you see error f75 on the display, this indicates a repeat of the pressure level check error. In this case, you should call a specialist to inspect the condition of the heating system.

Conclusion

After installing the Gepard gas equipment, the first settings must be performed by a company specialist. This is required in order to select the most suitable pressure level for the heating system and set the temperature indicators at the desired level. Otherwise, the equipment may not be covered by warranty.