This article outlines what trademark Baxi, information on the manufacturer, as well as the main specifications each series Baxi gas boilers.
General information on the manufacturer of gas equipment BAXI
BDR Thermea occupies a leading position in the world as a manufacturer of high-tech heating and hot water systems. The total turnover of this market is estimated at 16 billion Euros.
BDR Thermea employs 6,400 people. At annual turnover of 1.8 billion euros the company occupies a leading position in the markets of such European countries as France, Great Britain, Germany, Spain, Italy and the Netherlands. In the markets of countries of Eastern Europe BDR Thermea has gained quite a strong position in last years. The same goes for Turkey, China and the US. The company's products can be purchased in more than 70 countries.
BDR Thermea has chosen the following strategy for itself: promotion of local brands with strong positions in European markets. These brands can quickly respond to consumer preferences. Thus, the products of the BDR Thermea group in Europe can be found under the brands Remeha, Baxi, De Dietrich, Heatrae Sadia, Potterton, Brotje, BaxiRoca, Chappee and Baymak.
The company takes great care of relations with partners, investing heavily in employees and strengthening ties with foreign partners. BDR Thermea strives to offer customers complete heating and hot water solutions based on innovative technologies.
Products under the Baxi brand
The company claims that Baxi boilers embody the latest technology and rich experience gained by the corporation over the years. Maximum efficiency combined with a reasonable price gives the best working qualities.
More details on each boiler of this trademark you can read by selecting it in one of the relevant headings:, or, where, by selecting the one you are interested in boiler, you can read it reviews, look options, download instructions and get to know other nuances on specific boiler.
The range of household gas boilers Baxi is very large. Let us consider in more detail the products of this company, for the convenience of perception, bringing the series of boilers into tables.
Gas boilers BAXI series LUNA-3 COMFORT
Baxi gas boilers of the LUNA-3 COMFORT series
These units belong to the third generation. Equipped with a removable electronic control board, which allows you to install it in any place convenient for you. A pleasant trifle is the presence of a room temperature sensor on the board.
The gas system of the boilers of this series is equipped with an electronic flame modulation system, electronic ignition and steel flame dividers. The boilers can operate when the gas pressure drops to 5 mbar, which is important in Russian realities. Moreover, burning is possible not only, but also liquefied gas.
The DHW circuit has an electronic water flow meter. The primary heat exchanger is made of copper coated with a special anti-corrosion compound. Secondary heat exchanger in stainless steel. There is also a pressure gauge, a filter at the water inlet from the network, and other interesting options.
Boiler control system LUNA-3 COMFORT allows you to program the heating mode for a whole week in advance. It is also possible to connect an outdoor temperature sensor, and then the heating mode will be guided by the outdoor temperature.
Among other things, these devices have a lot of security systems. This includes flame control, and protection against blocking of the three-way valve and pump, a thermostat for protection against water overheating and other protection systems.
| Specifications | LUNA-3 COMFORT AIR 250Fi | LUNA-3 COMFORT AIR 310Fi | ||||||
| 31 | 25 | 24 | 25 | 31 | 31 | 25 | 24 | |
| 10,6 | 9,3 | 9,3 | 9,3 | 10,4 | 10,4 | 9,3 | 9,3 | |
| Maximum consumption of natural (liquefied gas) m3/h (kg/h) | 3,52 (2,63) | 2,84 (2,12) | 2,78 (2,07) | 2,84 (2,09) | 3,52 (2,59) | 3,52 (2,63) | 2,78 (2,07) | 2,78 (2,07) |
| Max. productivity, % | 93,1 | 92,9 | 91,2 | 92,9 | 93,1 | 93,1 | 92,9 | 91,2 |
| Productivity at 30% of power, % | 90,8 | 90,2 | 88,7 | 90,2 | 90,8 | 90,8 | 90,2 | 90,3 |
| Expansion tank, l | 10 | 8 | 8 | 8 | 10 | 10 | 8 | 8 |
| The combustion chamber | close | close | open | close | close | close | close | open |
| Temperature control range in the DHW circuit, °C | 35-65 | 35-65 | 35-65 | 35-65 | 35-65 | - | - | - |
| Nominal inlet gas pressure, mbar | 13-20 | 13-20 | 13-20 | 13-20 | 13-20 | 13-20 | 13-20 | 13-20 |
| Electrical power, W | 165 | 135 | 80 | 135 | 165 | 165 | 110 | 170 |
| Dimensions: -height, mm |
760 | 760 | 760 | 760 | 760 | 760 | 760 | 760 |
| -width, mm | 450 | 450 | 440 | 450 | 440 | 450 | 450 | 450 |
| - depth, mm | 345 | 345 | 345 | 345 | 345 | 345 | 345 | 345 |
| NET/GROSS weight | 39/42 | 37/40 | 32/35 | 39/42 | 45/50 | 37/40 | 36,5/39,5 | 30,5/33,5 |
Gas boilers BAXI series LUNA-3 Silver Space
Wall mounted boilers of this series are designed to work on outdoors. The boilers can operate down to -15 °C.
Gas system LUNA-3 Silver Space similar to boilers .
Hydraulic system differs by the absence of an electric servomotor in the three-way valve and the presence of a high-speed circulation pump with an automatic air vent.
Also boilers Silver Space have a device remote control with climate control.
Otherwise, the boilers of these series are similar.
Technical characteristics of gas boilers manufacturer BAXI LUNA-3 Silver Space series
| Specifications | LUNA-3 SILVER SPACE 310 Fi | LUNA-3 SILVER SPACE 240Fi |
| Max. useful thermal power, kW | 31 | 24 |
| Min. useful thermal power, kW | 10,4 | 9,3 |
| Max. consumed thermal power, kW | 34,3 | 26,3 |
| Min. consumed thermal power, kW | 11,9 | 10,6 |
| Max. consumption of natural (liquefied) gas, m3/h (kg/h) | 3,63(2,67) | 2,78(2,04) |
| Max. productivity, % | 90,3 | 90,3 |
| Performance at 30% power | 88,0 | 88,0 |
| The combustion chamber | close | close |
| Power, W | 190 | 170 |
| dimensions - height, mm |
830 | 830 |
| dimensions - width, mm |
550 | 550 |
| dimensions - depth, mm |
250 | 250 |
| NET weight, kg | 42 | 41,5 |
Gas boilers Baxi series Nuvola-3 B40
Boilers of the NUVOLA-3 B40 series specially created for high hot water consumption. Thanks to the built-in boiler, these units are able to produce 450 liters of water within half an hour, heated by 30 ° C in relation to cold. A wide LCD display will allow you to clearly see all the information about the operation of the boiler and possible failures.
The volume of the built-in boiler is 40 l, the body material is AISI 316L enamelled steel.
If there is not enough water pressure, the pressure switch will work. There is also a system of protection against freezing of water in both circuits.
The line is represented by four models: NUVOLA-3 B40 240 i, NUVOLA-3 B40 280 i, NUVOLA-3 240 Fi, NUVOLA-3 280 Fi.
NUVOLA-3 Comfort.
In this series, the built-in boiler has become even larger. Now its volume is 60 liters. This means that you can already get 510 liters of hot water within 30 minutes. The boilers of this series are equipped with a removable digital panel.
In total, the series has 5 units: NUVOLA-3 Comfort 240 i, NUVOLA-3 Comfort 280 i, NUVOLA-3 Comfort 240 Fi, NUVOLA-3 Comfort 280 Fi, NUVOLA-3 Comfort 320 Fi.
BAXI gas boilers of the LUNA-3 Comfort COMBI series
These are no longer just boilers, but a whole complex consisting of a wall-mounted boiler and an 80-liter boiler placed on the floor. Moreover, the boiler is designed in such a way that it is possible to install the boiler on the boiler without fixing it to the wall. The compact dimensions of the boilers of this series are also noteworthy: 1640 × 450 × 550. Thanks to them, the boiler can be placed even in the smallest rooms.
In fact, the series is a combination of a boiler LUNA-3 Comfort 1.310 fi with boiler COMBI 80.
The elegant design and compact size did not prevent the designers from making connecting the boiler to the boiler simple. As a separate option, a set of low-temperature heating circuits (“warm floor”) is offered. It consists of a mixing valve, a pump and a temperature sensor. The system allows you to connect not only boilers LUNA-3 Comfort 1.310 Fi and LUNA-3 Comfort Combi, but also any other single-circuit from the series a besides this, boilers LUNA-3 Comfort HT 1.120, LUNA-3 Comfort HT 1.240, LUNA-3 Comfort 1.280.
However, to connect the boiler to the boiler, you will need a special kit KSL 714110510.
The fourth generation of boilers begins with a series MAINFour, which is, in fact, continuation of the MAIN Digit series. Despite its compact dimensions (730×400×299 mm), the boiler is equipped with a control panel with a wide LCD display. BUT small size allow the unit to be used in confined spaces.
Gas boilers BAXI ECO Four series
These boilers are also ultra-compact, like the previous ones. Their sizes are the same, but the series on the basis of which they are released is different - ECO-3 Compact.
Boilers ECOFour Available in both single and double sided. Combustion chambers can be either open or closed. The power of the units reaches 24 kW. The undeniable advantages of this series include ease of maintenance, operation and installation.
And of course, it was not without a wide LCD display as part of a digital control panel.
New to the market is wall-mounted boiler of the fifth generation MAIN 5.
In addition to the above, BAXI has wall-mounted boilers of the LUNA-3, FOURTECH series.
Description of the series of wall-mounted condensing boilers from BAXI
Presented in the company's products and wall mounted condensing boilers. This is a series PRIME HT, LUNA HT Residental, LUNA-3 Comfort HT, NUVOLA-3 Comfort HT, Duo-tec Compact, LUNA Duo-tec, NUVOLA Duo-tec, LUNA Duo-tec MP.
The condensing technology of BAXI boilers provides an efficiency of about 110%, which leads to fuel savings of 35% per annual period compared to traditional boilers.
In addition, condensing boilers still manage to work silently. All thanks to the combustion chamber made of special composites.
LUNA HT Series designed in such a way that the boilers can be connected to each other in a cascade. Thanks to the control units available as accessories, up to 12 boilers can be connected together.
Duo-tec Compact– these boilers are able to adapt to the quality and type of gas, the diameter of the chimney and other parameters . In addition, they include a burner with complete pre-treatment of the gas-air mixture, which makes it possible to achieve a power modulation factor of 1:7.
LUNA Duo-tec MP- powerful units, reaching 110 kW in this parameter. In addition, up to 16 boilers can operate in cascade. The power modulation factor of these boilers is 1:9.
Brief overview of floor gas boilers from BAXI
Floor standing gas boilers Baxi Power HT
Floor gas BAXI boilers is a series POWERHT and POWERHT 230-320, as well as Slim and Slim HP.
In spite of high power(up to 150 kW), engineers in a series of units POWERHT managed to save compact dimensions. So, all boilers have a width of 45 cm. At the same time, in the series POWER HT 230-320 power increased even more, up to 320 kW. Such boilers are suitable for heating large buildings, for example, office or shopping complexes. High durability is achieved through the use of silumin heat exchanger.
Slim boilers and Slim HP have a cast-iron heat exchanger and an atmospheric burner. Power range ranging from 15 to 62 kW. And in Slim HP There is also fiberglass insulation under the shell to keep heat loss to a minimum.
All the above (and other) boilers can be found in the category:.
If the article was useful, as a thank you use one of the buttons below - this will slightly increase the ranking of the article. After all, it's so hard to find something worthwhile on the Internet. Thank you!Hinged double-circuit gas heating boiler, which we will leave a review on today, is one of the highest quality in model range heating wall-mounted water heaters of this Italian manufacturer.
In order to be convinced of this in more detail, we need to compare the technical characteristics of Baksi EcoFor 24 F and prices, study the operating instructions for the model (passport), reviews of owners and specialists. In addition, we will pay attention not only to the advantages of the boiler, but also to its shortcomings, having analyzed its main breakdowns, malfunctions and errors, as well as ways to eliminate them.
Baxi Eco Four boiler: instruction manual, features
A series of gas boilers "Baxi Eco Four" is a reliable fourth-generation wall-mounted gas heating device in the "family" of brand boilers. The boiler of this series features good quality assembly and used components, spare parts. See photo gas boiler Baxi Eco Four 24F.
Boiler Baxi Eco Four 24 F
The Italian company launches several modifications of Baxi Eco Four boilers on the market: double-circuit and single-circuit, with open and closed camera combustion. In addition to all this, today, devices are produced in two types of power: 24 kW and 14 kW. Let's see what models the manufacturer offers us.
1. Double-circuit gas boilers (heating and hot water):
— Eco Four 24F;
— Eco Four 24.
2. Single-circuit gas boilers (only for heating):
— Eco Four 1.24F;
— Eco Four 1.24;
— Eco Four 1.14F;
— Eco Four 1.14.
The number in the abbreviation indicates the power of the device in kW, and the letter "F" indicates that the boiler is turbocharged, with a closed combustion chamber.
Baxi Eco Four 24F: double-circuit gas boiler device
The most popular, judging by the reviews of owners and specialists, is Baxi model Eco Four 24 F. This is a two-circuit mounted heater with forced draft, with a power of 24 kW, capable of heating private house area up to 200-220 m2. It consists of several main elements characteristic of a modern wall-mounted gas boiler:
- two heat exchangers (copper - for heating, stainless steel - for hot water supply);
- two-speed circulation with automatic air vent;
– Italian gas valve SIT 845;
— gas-burner Polidoro with stainless tips;
- Honeywell electronic board;
— brass three-way valve with electric actuator;
- expansion membrane tank with a volume of 6 liters.
As we can see, all the main elements of the Baksi Eco For 24 F gas boiler are produced by well-known companies, world leaders in their industry. In addition, all internal parts are made of brass: hydraulic group, supply pipes and gas part. The boilers are adapted to Russian frosts and are able to function even at very low gas pressure.
The device and principle of operation of the boiler Baxi Eco Four
The gas burner of the boiler has stainless steel nozzles and smooth flame modulation with smooth electronic ignition, as on all budget units of this manufacturer. A specially developed system for automatic regulation of air supply to the apparatus is protected by a patent.
Functions, control and safety
As on all models of the fourth-generation Baxi boilers, on the front side of the Eco Four 24 F wall-mounted apparatus there is a control panel with an LCD display, which displays and sets the settings and parameters, the temperature in the heating circuit and hot water. In addition, they appear on it when malfunctions or malfunctions occur during the operation of the boiler.
The heating circuit of the Baxi Eco Four boiler can operate in two modes:
– traditional (30-85 °С);
- warm floor (30-45 ° C).
Like the boilers of the Main Four series, all Baxi Eco Four devices incorporate weather-dependent automation that helps the boiler to work depending on the temperature outside the window. All that is needed for this is to buy an outdoor temperature sensor, install and connect it to the boiler.
Buying and connecting a room thermostat will also help save money, because the operation of the boiler, in this case, will be carried out depending on the set air temperature in the house or apartment.
Baxi Eco Four boiler control panel
Boilers "Baxi Eco Four 24 F" are equipped with modern elements safety: the pneumatic relay (draft sensor) is triggered when there is insufficient draft in the chimney, when the pressure in the heating system is low, a special pressure switch is turned on, and when the pressure is too high, a safety valve of 3 bar is activated. There are flame control sensors, temperature sensors on the heating circuit and running water, manometer.
energy saving circulation pump"Grundfos UP 15-50" automatically turns on once a day to avoid blocking the three-way valve or jamming it. This function is very useful when the heater is idle for a long time and not in use.
Also, the boilers of this series are equipped with a modern self-diagnosis system: the device itself periodically tests the operation and reports any problems on the LCD display. It is possible to connect to bottled gas, after changing the gas nozzles for liquefied gas.
Baxi Eco Four 24 F: gas boiler specifications
The smoke exhaust system of the Eco For boiler is designed for a diameter of 60/100 mm. When buying an adapter for dividing the chimney channels, it is possible to install aluminum pipes with a diameter of 80 mm. Atmospheric boiler with open cam The combustion chamber does not have a fan, and the diameter of its chimney pipe is 120 mm.
Heating and gas are connected to fittings with a thread diameter of 3/4', the DHW circuit is 1/2'. The device has compact dimensions of 730/400/299 mm. The capacity of the hot water circuit of the boiler is about 14 l / min., which is quite enough for the simultaneous operation of two points of water intake: a kitchen and a bathroom. These and other technical characteristics are described in the table.
Baksi Eco For 24F: technical characteristics of the boiler
Baxi Eco Four gas boiler errors
E01 - the burner does not ignite.
E02 - overheating protection sensor tripped.
E03 - Faulty thrust pressure switch.
E05 - the temperature sensor of the heating circuit has tripped.
E06 - malfunction temperature sensor DHW circuit.
E10 - insufficient pressure in the heating system.
E25 / 26 - no circulation in the heating system due to pump blockage.
E35 - false flame.
E96 - insufficient voltage in the electrical network.
Advantages of the gas boiler Baxi Eco Four 24F:
- European assembly;
- two heat exchangers;
— good quality components and main components;
— modern system security;
- the ability to connect and outdoor temperature sensor;
- network service centers around the country.
Disadvantages of the gas boiler Baxi Eco Four 24 F:
— high price from 37,000 rubles;
- expensive spare parts;
— a small volume of the expansion tank 6 liters;
- The electronic board is sensitive to power surges.
Today we left a review on the popular double-circuit wall model boiler for heating -, technical specifications, device according to the operating instructions. The reviews of owners and specialists are rather contradictory, but the undoubted advantage of the EcoFor series devices is the presence of two separate heat exchangers, a brass hydraulic group and a Grundfos brand pump. Let's watch the video.
The actual total gas consumption for a certain period of time practically does not depend on the power of the boiler, but depends on the heat loss of the heated room, the mode of operation of the equipment and the amount of water used in the hot water circuit (DHW).
In the passports of gas boilers, as a rule, gas consumption is given at minimum and maximum power. Gas consumption is usually given for standardized gas types (G20 - natural gas methane, G30 - liquefied gas butane, G31 - liquefied gas propane).
For an "average" imported boiler with an efficiency of 90%, the total gas consumption at a load (net power) of 10 kW is approximately equal to:
– 1.2 m3/h for natural gas (G20);
– 0.86 kg/h for LPG (G30 or G31).
When calculating natural gas consumption, it should also be taken into account that in Russia, the lower calorific value may differ from standardized G20 gas downwards (up to 10–15%).
Reference data:
Lower calorific value of gases:
– for natural gas G20 (methane) is equal to 34.02 MJ/m3;
- for liquefied gas G30 (butane) is 45.6 MJ / kg;
- for liquefied gas G31 (propane) is 46.3 MJ / kg.
Values are at 15°C and atmospheric pressure 1013 mbar (760 mm Hg or 1 atm).
The exact gas consumption for non-condensing boilers can be determined by the formula: Gas consumption (m³/h or kg/h) = 3.6 Power consumption (kW) where
About the joint operation of BAXI boilers
ADVANTAGES OF USING SEVERAL BOILERS FOR ONE HEATING SYSTEM
An increasingly popular solution among installation and design organizations is the use of several boilers for one heating system. Such a solution is justified with a thermal load already starting from 40 kW. This can be either a large heated area, or the presence of thermal loads in the form of pools, garages, baths, greenhouses, etc.
The use of several boilers for one heating system has a number of advantages compared to one boiler with the same total capacity. We list some of these advantages.
Firstly, several small, smaller and lighter boilers are much easier and cheaper to transport to the boiler room and install there instead of one large and heavy boiler. (Especially relevant is this moment when installing roof or semi-basement boiler rooms.)
Secondly, the reliability of the system is significantly increased. If one of the boilers is forced to stop, the system will continue to work, providing at least 50% of the power (if two boilers are installed).
Thirdly, maintenance is facilitated by the smaller size of each boiler. can be carried out without stopping the entire system and.
Fourthly, the total resource of boilers increases. In autumn-spring time, only a part of the boilers can be operated by turning off some of the boilers manually or using cascade automation.
Fifthly, if in the future it will be necessary to replace any part of the boiler, then it is known that parts for boilers of lower power are more accessible and cheaper due to the greater serial production. It goes without saying that service work must be carried out by trained and competent personnel. Professional specialists will be able to perform a fairly large range of work directly at home with client clients. For several years we have been repairing gas boilers and servicing, while constantly supplementing and improving the services provided. This became possible thanks to the high qualification of each of our masters.
To provide reliable operation boiler and achieving a long service life, it is recommended to regularly check the correct functioning of the boiler and regularly service the boiler.
Check frequency and after-sales service determined by the installation and use. For most conditions, it is acceptable to carry out annual inspection and maintenance work on the boiler. It is essential that service work be carried out by trained and competent personnel.
1) GENERAL CHECKS.
- Check chimneys from the side of the street. Make sure that they are not closed and that no foreign objects have got inside.
- Switch on the boiler and check the operation of the controls and safety devices. (More detailed instructions see the installation and operating instructions for checking the operation of the controls and safety, or ask your dealer, specifying specific models).
- Make sure all connections and fittings are securely fastened. If necessary, repair leaks and redo unreliable connections.
- Check the gas valve setting (minimum and maximum burner pressure).
- Check and, if necessary, clean the inlet filters cold water(one filter is located in the hydraulic unit of the boiler, and the second one is in the cold water inlet valve) and a secondary plate heat exchanger.
- To check the safety valve of the heating system, we recommend turning the valve head counterclockwise until it clicks. Check that after clicking, the safety valve allows water to exit the system.
Reinstall the relief valve head (turn clockwise). - If necessary, change the water in the heating system (flush the system). Fill the system up to required pressure(approximately 1 atm. in a cold state).
If the pressure in the system after heating to the maximum temperature exceeds 2.5 atm., Then it is necessary to check the expansion tank and bring the pressure in it to the required one.
Note:
- The expansion tank must be checked when the pressure in the system is zero
- Pressure test point in expansion tank located at the top rear of the boiler.
Note: Before servicing the boiler, disconnect it from the mains and shut off gas cock at the entrance to the boiler. Let the boiler cool down.
Always check for leaks after handling any gas components.
2) CLEANING THE BOILER.
- Remove all deposits and impurities on the primary heat exchanger using a soft brush and vacuum cleaner.
Do not use a brush with metal bristles! - Check Status insulating panels combustion chambers. Replace any damaged panels.
- Check the condition of the injectors (injectors) on the gas rail (gas manifold). If necessary, clean them thoroughly with a soft brush. Do not use a brush with metal bristles as this could damage the nozzles!
- Remove any loose debris from the boiler.
- Unscrew and replace injectors that look damaged.
- Clean the top of the burner with a soft brush and vacuum cleaner. Make sure flame openings are clean.
Dirty holes can be cleaned with a stiff brush. - Check the condition and correct location of the ignition electrode and the flame control electrode.
- Check that the fan impeller is clean and free to rotate (if a fan is present).
3) MAINTENANCE OF HEAT EXCHANGERS IN WALL BOILERS "BAXI".
When using wall-mounted boilers with instantaneous DHW heat exchangers, the following is recommended:
- Install a mechanical filter at the cold water inlet of the water supply system to the boiler (to reduce the risk of contamination of the heat exchanger). This filter must be cleaned or replaced regularly, depending on the type of filter.
- To significantly reduce the rate of scale formation in the heat exchanger, it is preferable to use water at a set DHW temperature not higher than 45°C.
- Depending on the hardness of the water, on the set DHW temperature on the boiler and on the amount of water used, regularly clean the heat exchanger once every 1-5 years. With sufficiently hard water and subject to points 1 and 2, we consider it expedient to clean the heat exchangers once every 3 years.
- If the water hardness is higher than 20 F (where 1 F = 10 mg CaCO3 per 1 liter of water), devices should be installed to prevent scale clogging of the DHW heat exchanger (for example, a magnetic or electromagnetic activator, a polyphosphate dispenser).
- Disconnect hot and cold water pipes from the boiler (DHW system).
- Connect the pump with flushing liquid for descaling to the freed pipes of the boiler.
- Turn on the pump for 30 - 60 minutes.
- Restore original connections.
Gas consumption in BAXI boilers
The actual total gas consumption for a certain period of time practically does not depend on the power of the boiler, but depends on the heat loss of the heated room, the mode of operation of the equipment and the amount of water used in the hot water circuit (DHW).
In the passports of boilers, as a rule, gas consumption is given at minimum and maximum power. Gas consumption is usually given for standardized gas types (G20 - natural gas methane, G30 - liquefied gas butane, G31 - liquefied gas propane).
For an "average" imported boiler with an efficiency of 90%, the total gas consumption at a load (net power) of 10 kW is approximately equal to:
– 1.2 m3/h for natural gas (G20);
– 0.86 kg/h for LPG (G30 or G31).
When calculating natural gas consumption, it should also be taken into account that in Russia, the lower calorific value may differ from standardized G20 gas downwards (up to 10–15%).
Reference data:
Lower calorific value of gases:
– for natural gas G20 (methane) is equal to 34.02 MJ/m3;
- for liquefied gas G30 (butane) is 45.6 MJ / kg;
- for liquefied gas G31 (propane) is 46.3 MJ / kg.
Values are at 15°C and atmospheric pressure 1013 mbar (760 mm Hg or 1 atm).
The exact gas flow rate for non-condensing boilers can be determined by the formula: Gas consumption (m³/h or kg/h) = 3.6 Power consumption (kW) where
About the joint operation of BAXI boilers
1. ADVANTAGES OF USING SEVERAL BOILERS FOR ONE HEATING SYSTEM
An increasingly popular solution among installation and design organizations is the use of several boilers for one heating system. Such a solution is justified with a thermal load already starting from 40 kW. This can be either a large heated area, or the presence of thermal loads in the form of pools, garages, baths, greenhouses, etc.
The use of several boilers for one heating system has a number of advantages compared to one boiler with the same total capacity. We list some of these advantages.
Firstly, several small, smaller and lighter boilers are much easier and cheaper to transport to the boiler room and install there instead of one large and heavy boiler. (This moment becomes especially relevant when installing roof or semi-basement boiler rooms.)
Secondly, the reliability of the system is significantly increased. If one of the boilers is forced to stop, the system will continue to work, providing at least 50% of the power (if two boilers are installed).
Thirdly, maintenance is facilitated by the smaller size of each boiler. Maintenance of each boiler can be carried out without stopping the entire system.
Fourthly, the total resource of boilers increases. In autumn-spring time, only a part of the boilers can be operated by turning off some of the boilers manually or using cascade automation.
Fifthly, if in the future it will be necessary to replace any part of the boiler, then it is known that parts for boilers of lower power are more accessible and cheaper due to the greater serial production.
2. ABOUT CASCADE CONTROL UNITS
Most often, to simplify the schemes when using SLIM series boilers together (see diagrams below), no cascade automation is provided, and the required outlet temperature is set on each boiler. But if you want, you can easily use blocks cascade control, which are connected to contacts intended for connecting individual room thermostats.
Connecting boilers in cascade using a cascade control unit is a complete solution and has a higher efficiency. This block ensures that all boilers operate alternately and guarantees the same number of operating hours for each boiler. The cascade control unit optimizes the operation of the system and ensures that only the required number of boilers are switched on, depending on the required power. When working with modulating burners, the cascade control unit, in addition to the principle described above, seeks to ensure that the boilers operate in partial power mode (in modulation mode).
The most effective use of the cascade control unit together with condensing boilers. In this case, the power released by the boilers is always ideally matched to the power consumed. For example, when using only three BAXI wall-mounted boilers of the LUNA HT Residential series with a power of 100 kW, the output power smoothly changes from 30 to 300 kW, depending on the needs of the system. This means that the working regulation ratio of such a system will be 1:10.
3. ABOUT BAXI CONDENSING BOILERS WORKING IN CASCADE
Condensing boilers are the last word in the development of innovative technologies. Thanks to their reduced gas consumption, they become the most profitable solution for the consumer and are currently the most economical gas-fired installations. When incorporated into a low temperature system, condensing boilers can reduce gas consumption by up to 35% per year compared to conventional boilers and thus reduce gas costs by 35%.
As part of a cascade system, condensing boilers represent a new alternative to systems industrial heating.
The use of BAXI condensing boilers in cascades from 45 to 150 kW has become popular due to the following advantages:
– the ability to provide high power in a limited space;
- easier installation of roof boilers in cascade installation;
- small specific gravity equipment (per unit of power);
– lower vibration and noise level compared to traditional boilers with blast burners;
– Significant savings in gas, which is becoming more and more significant due to the regular increase in the cost of gas;
- the presence of a built-in fan. This allows you to use small diameter chimneys and do without large expensive chimneys;
– environmental friendliness of condensing boilers. The very low content of CO and NOx in comparison with any other boilers allows the use of such systems in large cities and natural areas.
4. TYPICAL SCHEMES USING SEVERAL FLOOR SLIM BOILERS.
Scheme 1
In diagram 1, several BAXI floor-standing boilers of the SLIM series work together for one heating system through a hydraulic separator (“hydraulic arrow”).
This scheme is typical and allows you to connect the required number of boilers and heating zones (or heat load zones). In this scheme, all the advantages described above of using several boilers for one heating system are fully realized. If desired, a cascade control block can be used in this circuit. Also, sometimes instead of floor boilers, wall-mounted boilers are used.
The system has
– two high-temperature heating zones with their own pumps (H1 and H2). The temperature of each zone is controlled by a zone room thermostat (TK1 and TK2);
– two low-temperature zones (“heat-insulated floors”) regulated by water temperature sensors.
– a hot water boiler connected as one of the zones of the heating system. The water temperature in the boiler is controlled by the boiler thermostat (TB) by switching on the boiler loading pump (NB).
Scheme 2
In diagram 2, two boilers operate on single system heating. At the same time, the built-in automation of one of the boilers is used to heat the boiler for hot water supply. (Most often, the following BAXI products are used in the implementation of this scheme: two SLIM 1.490 iN boilers with a capacity of 49 kW each and a SLIM UB 120 boiler with a capacity of 120 liters or a PREMIER PLUS 200 boiler with a capacity of 200 liters).
In addition to the above advantages of using several boilers per heating system this scheme allows:
– do without the use of additional complex blocks of cascade control;
- use the built-in weather-dependent automation of boilers;
- do not change the temperature of the heat carrier in the heating system if there is a request from the hot water boiler;
- use the built-in automatic hot water priority on one of the boilers.
When designing a heating system according to this scheme, attention should be paid to the following points.
- Each boiler pump must independently, "alone" provide the necessary water flow throughout the entire heating system. If this is not possible, it is recommended to install a hydraulic separator ("water separator") and a separate pump(s) in the heating system.
– It is recommended that the temperature control knobs in the heating system be set to the same position.
For simplicity, the diagram does not show shut-off valves, filters and other elements.
The system has:
– high-temperature heating zone;
- low-temperature zone ("warm floors"), regulated by a water temperature sensor;
- a hot water boiler connected to one of the boilers. When the water in the boiler cools down, the boiler turns off the pump of the first boiler (NK1) and turns on the loading pump of the boiler (NB1).
Examples of circuits using several BAXI condensing boilers are shown in the "Diagrams using accessories for temperature control in condensing boilers" section.
BAXI boiler control panels
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Is your house already built? Thinking about the choice of energy resources for autonomous heating? There are several sources of thermal energy: natural gas, firewood, coal, fuel oil, liquid fuel, electricity. The technical representative of BAXI in the Volga region Shipov Sergey Nikolaevich will tell about the use of liquefied petroleum gas as a fuel.
The concept of liquefied gas
In Russia, liquefied petroleum gas is usually called hydrocarbon gases (LPG) based on a mixture of light hydrocarbons liquefied under pressure with a boiling point of -50 to 0 °C. The composition of such a gas can vary significantly, the main components are propane, propylene, isobutane, isobutylene, n-butane and butylene. Today, for autonomous gas supply systems, mixtures of liquefied technical propane and butane (SPBT, petroleum gas, complies with GOST 20448-90) are used, rather than liquefied natural gas (methane). The latter is stored at low temperatures in special cryogenic vessels, requires additional evaporators and is economically justified only for heating a large group of houses.
Liquefied petroleum gas (LHG) liquefies with a slight increase in pressure. Then it can be easily transported and stored. With a decrease in pressure or a slight increase in temperature, the "liquid" gas begins to evaporate and passes into the gas phase, ending in saturation. Saturated vapor pressure depends only on the ambient temperature and does not depend on the amount of liquid.
About 0.25 m3 of the gas phase is obtained from one liter of LPG. In winter, the gas pressure decreases and the gas phase supply capacity decreases. If steam is taken intensively (for example, turn on the boiler at 100% power), then the accelerated evaporation of the liquid will lead to its cooling and, therefore, to a decrease in productivity. To obtain the required volumes of gases, the number of LPG containers is increased. Optimal set propane has the desired properties. It steadily supplies the gas phase even in frosts, but is relatively expensive and good only in winter. In summer, when it is hot, its vapor pressure reaches the maximum value allowed for the walls of the vessel (1.6 MPa), so propane is diluted with cheaper and not intensively evaporating butane.
LPG is not recommended to be placed in basements and even basements if the area of the windows in them is less than 1 m2. Since a lot of air is required for the complete combustion of SPBT, it is necessary to provide in boiler rooms good ventilation. In addition, it is necessary to organize natural lighting in the room, as well as install a gas leak detection sensor and a self-powered automatic shut-off valve.
Scope of LPG
Due to its environmental friendliness (cleanliness of combustion) and relatively low production and processing costs, propane-butane gas has been widely used for industrial and household needs of the population. The scope of liquefied petroleum gas is wide. So, for example, LPG is used as a source of heat, fuel for cars, raw materials for the production of aerosols, etc.
The use of LPG as a raw material for home heating retains all the advantages of independent heating on natural main gas, with the exception of current gas costs. But it often happens that even with a relatively close location of the main gas pipeline, the prospect of connecting to the “cherished pipe” remains far beyond the horizon. In this case, the choice of fuel should be approached with a calculator. For example, consider heating a 300 m2 cottage with three types of fuel: liquid (diesel) (DF), mains electricity and LPG. On average, such a room consumes 80,000 kW of energy per year for heating. Based on this figure, we will carry out the following calculations:
Table 1. Economic comparison of heating costs for a 300m2 cottage
Prices are taken as of June 2011. The average gas consumption is 0.86 kg per 10 kW.
The presented fuel consumption and cost estimate table shows a clear feasibility study for the use of LPG. Additional advantages of bottled gas, unlike diesel fuel and electricity, will be: the possibility of organizing various options for the preparation of hot water (boiler or flow heat exchanger) and minimal emissions into the atmosphere, unlike diesel fuel. Only NOX, CO2 and steam will be emitted with flue gases. When using condensing boilers as heat generators, harmful emissions are significantly reduced, and gas savings can reach 30%!
Autonomous gas supply of LPG
Having opted for LPG, next step the question arises of the actual location of gas reservoirs and the gas supply of heat generating installations.
Two types of containers are used: gas cylinders and gas holders.
Gas cylinder - a steel welded cylinder for liquefied hydrocarbon gases (propane) GOST 15860-84 is designed for transportation and storage of propane different capacity 50, 25, 12 and 5 liters (working pressure - 1.6 MPa).
Installation of gas supply using small containers should be carried out with a number of cylinders of at least 3 pieces. This allows you to increase the evaporation surface and reduce the risk of freezing cylinders. It is important to use pressure regulators with the parameters required for a given boiler and type of gas. It is not allowed to use regulators not intended for LPG!
Gas tank - a reservoir designed for storage, regasification of liquefied hydrocarbon gas during gasification of residential buildings, household and agricultural facilities. Gas holders are distinguished by volume (from 0.25 to 100 m2). Unlike cylinders, they provide a larger evaporation surface and a larger volume of LPG storage and, as a result, fewer refuelings.
In any case, to get safe use LPG will require the design of gas supply at home. A complex and time-consuming process consists not only in the development optimal scheme gas supply at home, but also includes obtaining a number of permits and registering an autonomous gas supply system. In some cases, LPG is used as a backup fuel, but a number of operations must be carried out to transfer the boiler.
Application of LPG with boilers
When choosing a heat generator, you should pay attention to the possibility of its operation on LPG. Not all boiler manufacturers allow conversion to another type of fuel.
| Boiler model | Nozzle diameter for methane | Liquid nozzle diameter gas | Qty | Injector code for liquefied gas |
|---|---|---|---|---|
| MAIN Four 240F | 1,28 | 0,77 | 13 | 5680020 |
| MAIN 24Fi | 1,28 | 0,74 | 13 | 5666390 |
| MAIN Four 24 | 1,18 | 0,74 | 13 | 5666390 |
| MAIN 24 i | 1,18 | 0,74 | 13 | 5666390 |
| ECO Four 240Fi/1.240Fi, ECO-3 Compact 240Fi/1.240Fi | 1,28 | 0,77 | 13 | 5680020 |
| ECO Four 240i/1.240i,ECO-3 Compact 240i/1.240i | 1,18 | 0,77 | 13 | 5680020 |
| ECO Four 1.140Fi/1.140i, ECO-3 Compact 1.140Fi/1.140i | 1,18 | 0,77 | 10 | 5680020 |
| LUNA-3 (Comfort) 240Fi/240i, ECO-3 240Fi/240i | 1,18 | 0,74 | 15 | 601520 |
| LUNA-3 310Fi, LUNA 310Fi, ECO-3 280Fi, ECO 280Fi | 1,28 | 0,77 | 15 | 608450 |
| Nuvola-3 (Comfort) | 1,18 | 0,69 | 18 | 5666910 |
| Slim 1.150 | 2,6 | 1,5 | 2 | 3607110 |
| Slim 1.230/2.230 | 3,15 | 1,75 | 2 | 3607120 |
| Slim 1.300/2.300 | 3,5 | 2,05 | 2 | 3607130 |
| Slim 1.400 | 4,1 | 2,4 | 2 | 3607140 |
| Slim 1.490 | 4,5 | 2,65 | 2 | 3607150 |
| Slim 1.620 | 5,2 | 2,95 | 2 | 3607160 |
BAXI natural gas equipment can also be used as an LPG heat generator. To transfer BAXI atmospheric boilers and water heaters to LPG (in the G31 instruction), it is enough for the serviceman to perform three important operations:
1. “Inform” the board that the boiler is now working on G31 (LPG) (change a number of parameters F, or change the position of the jumper / toggle switch GPL);
2. Replace the existing nozzles with nozzles with a smaller through hole (purchased separately, see table. 2);
3. Reconfigure the gas valve (according to parameters G31).
For condensing boilers, the operation takes place at no additional cost:
1. Replace the gas diaphragm located at the outlet of the gas valve (included in the kit);
2. Set the H parameters using the control panel display;
3. If necessary, adjust the gas valve.
The use of LPG with condensing boilers not only reduces emissions in environment but also significantly reduces gas consumption.
Table 3. Approximate consumption of liquefied gas for residential heating
Features of the use of LPG
Active use by owners of private houses and industrial enterprises LPG autonomous gas supply system makes it possible to evaluate its advantages, advantages and reliability.
Low fuel consumption, excellent quality, convenient operation and long service life gas equipment These are the undoubted advantages of autonomous gas supply. Full independence from the main network with natural gas and the ability to receive all-the-year-round hot water and warmly attracts owners of private houses. Do not forget about the possibility of a fairly quick reorientation of BAXI equipment from methane to propane and vice versa. In addition, autonomous gasification is an economically viable LPG supply system compared to heating sources such as electricity and diesel fuel.
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