Gas-fired boilers

Wall bypass gas boilers are widely used for individual heating and hot water supply of apartments, country houses and cottages in most countries in Europe and almost everywhere - in Korea and Japan. The maximum heating power of boilers is typically 24-31 kW (but there are models and 42 kW) - this allows using one device needs to warm rooms up to 300-350 m2. Well, when cascading multiple boilers to heat can be built any size. Cheap and cheerful One major advantage of bypass wall boiler - a full "combat readiness": boilers are equipped with all necessary equipment to provide heating and hot water (DHW) country house. After the simple installation of gas boiler commissioning can enjoy the warmth for many years. Produce double-circuit boilers almost all the leading kotlostroitelnye company - their products are presented here as well. Such heating equipment is in the range of AEG, Bosch, Buderus, Vaillant, Viessmann, Wolf (all - Germany), Chappee, Frisquet (both - Spain), Ariston, Baxi, Beretta, Biasi, Ferroli, Fonditai, Hermann, Radiant Bruciaton, Sime (all - Italy), Protherm (Slovakia), Demir Dokum (Turkey), Termet (Poland), Dakon, Mora, Thermona (all - Czech Republic), Rinnai (Korea). Worth noting is rather expensive, but reliable wall bypass boilers STS (Sweden). Among the products of Russian companies are noteworthy models Siberia («Poc-tovgazoapparat"), NGK "Beetle" (Zhukovsky Machine-building plant »), Angels (« signal "), etc. Among the top sellers, according to many experts, firmly holding company Baxi and Vaillant, as well as Ariston, Beretta, Mora, Hermann and Junkers (Germany). Two sides of the coin wall bypass boilers in addition to the low price wall bypass boilers have other advantages. Thus, virtually all boilers are equipped with modulating burners that change on the "Order" microprocessor heating power (usually in the range 40-100%, but in some models, such as boilers, Rinnai, - 25-100%) and controls the temperature of heating fluid and domestic water depending on the needs of the building warm. Wall-mounted double-circuit boilers adapted for use here, are not afraid of lowering the gas pressure in the pipeline up to 13 mbar, and some models - and up to 3.5 mbar. Of course, the power in such short supply gas pressure is reduced by 5-6 times compared to the nominal, but the boilers are operating stably. But for atmospheric burners outdoor boiler operation at reduced pressure is harmful: the flame "sits" on the burner, it burns and premature failure. If the gas is only planning to bring to your home, you can reconfigure the wall Turbofan gas boiler on imported bottled gas (LPG). Automation "nastennikov" provides autonomous operation of devices throughout the year (to the boiler can not even fit). Well, the security system takes care of the equipment from misuse and various extreme situations. There is a wall-mounted boilers and double-circuit faults. Firstly, it is smaller than the floor, the service life (5-15 years). Secondly, the noise level devices up to 55 dBA, and sometimes even more so in poor sound insulation works the boiler can be heard not only in the kitchen, where he was taken place, but also in other rooms. Third, utility water when using them usually gets hot only a 1.9 / 5 with after opening the tap. Most models on sale netakdavno and the consumer qualities of this technique can be judged only from indirect indicators. Therefore, choose boilers recommended primarily on the experience of the manufacturer, and it having an extensive network of service centers. Briefly tell about the possibilities of modern wall bypass boiler as heating appliances and hot water suppliers, as well as how to choose among many models, one that is suitable for installation in a country house. In search of warmth is obvious that the main purpose of modern wall bypass boiler - space heating. These devices are already equipped with built-in elements needed to organize a full-scale boiler plant, including one or two circulation pumps, diaphragm tank, automatic system, a number of different components to ensure trouble-free operation of the boiler, etc. Wall bypass boilers can be connected directly to the radiator heating system at home. Many models of boilers at the same time maintain coolant temperature 30-85 ° C. In wall boilers Frisquet wider range: 20-85 ° C with an accuracy of 0,5 ° C. Wall two-circuit power boiler must meet the needs of a country house in the warmth. However, in practice for any modern cottages have to buy Wall double-pressure boiler is much more power than needed to heat buildings, in order to provide enough intense stream of hot water from the taps. Coolant (some manufacturers allow only water) is heated usually in a copper heat exchanger that provides heat transfer from flue gases. It is mounted above the chamber two-circuit of the boiler - a metal box (about 20x20x20 cm) sheets of aluminized steel with thermal insulation. At the bottom of the combustion chamber, in place of the bottom of the box, is the injection burner. As soon as it becomes necessary to file the coolant in the heating system, boiler burner is ignited by a signal from the electronics. (If you double-circuit wall boiler is provided pezorozzhig, then run the boiler after the power supply must be implemented manually. Subsequently, gas is ignited by constantly burning pilot. When power failures country house in the absence of such a cauldron of people did not start that could lead to exit cooled down the heating system. Many modern models of wall-mounted boilers are equipped with double-circuit electronic ignition: when power is restored, they are automatically included with preservation of the original settings.) Following the burner starts pump, and water from the circuit enters the heat exchanger in the heating system and radiators. As the temperature of water in the heating system supply gas to the burner is reduced, which will save gas and increase the efficiency of the boiler. When water temperature exceeds the specified, gas to the burner stops and the boiler goes into standby mode (before the next heating cycle). For some time the pump will continue to work for even heat distribution within the system to prevent overheating and damage to the heat exchanger wall of the boiler. Budget version of the regulation of the heating system requires a connection to automation two-circuit "nastennika" control room located in the "standard" room (nursery or bedroom, without the intense insolation and drafts) and tuned to a specific value at room temperature. At the command of this unit the boiler turns on and off, which is usually accompanied by heat and overrun rather significant temperature fluctuations in the premises. Thermal background will vary with the delay, because automation will take effect only when the temperature in the house, for example, decline, and it occurs later than the actual cooling in the street. If the budget option and use regulation, in order to save energy is better to install a "standard" room room controller with the function of programming (for a day or week). The regulator can set the temperature, depending on the needs at different intervals (eg, on weekends and weekdays, evenings and during the day). The cost of the programmable controller - $ 55-80. There are boilers, which suggests the possibility of automatic regulation of temperature-dependent flow temperature of outdoor air. Outdoor sensor is installed on the northern facade of the house, protected from the sun site. Inside one of the heated rooms assemble additional room control. Immediately, two sensors - and a room, and a street - can accurately track and quickly adjust the temperature in the house. Regardless of the method of regulation to maximize comfort radiators in all rooms (except the "standard" with the room controller) preferably equipped with thermostatic valves. Modern wall bypass boilers can equip in the suburban housing and a mixed system of heating: radiators + heated floors. There are other options for their use - for example, for heating water in the pool, to supply the heat of the house (say, only the garage), as already noted, the possibility of cascade connection of several boilers to increase the total thermal power, etc. How much water under the bridge. .. Practice shows that the water supply through the wall of the boiler with instantaneous two-circuit heat exchanger for heating water is guaranteed to suit those users who for many years enjoyed the instantaneous electric water heaters or electric accumulation tank for heating cold water. But residents of large volumes of homes or the temperature of hot water produced in such a device may not be enough. Compact and lightweight wall two-Contour boilers with flow heat exchanger and cheaper to heat water only when necessary. However, the device capabilities are not limitless. Boilers 24-31 kW provide delivery 12-18 l / min heated at 25 ° C water. If the temperature of incoming water in the house is 10 ° C (about it is winter in the water), at the designated flow from the taps will be flowing stream, heated to 35 ° C. In summer, when the initial coolant temperature of 15 ° C water in the taps will be hot (40 ° C). Of course, reducing the pressure, we can reduce the consumption of hot water and to achieve a comfortable temperature. The maximum water temperature at the outlet of the boiler with a flow heater - up to 65 ° C, but the flow from the tap, it will be with a rate of about 3.8 l / min. How many points can provide a water pumping hot water boiler with a flow-through heater? Through the spout kitchen faucet follows approximately 5-6 L / min, through shower heads imported Mixer - 5-10 L / min. Thus, it is clear that instantaneous heating boiler at the same time will provide hot water sink and shower or easily fill a bath (it is necessary that the font was received about 12 liters per minute of hot water - then it will not have time to cool). At higher boiler is not capable of. Heating water for domestic use in the hot water starts automatically when you open the hot water tap on any mixer. In this case, the principle of priority before heating: First, hot water for taps, and then - for the batteries. Practice shows that even in the bath days, when the boiler heats water for hot water for 2-3 hours in a row, "forgetting" about heating, exposure to cold at home does not occur in severe frosts. Hot water will flow from the tap all the time, while it is open. Many modern boilers, such as 28 CX, TLC (Thermona), for the preparation of hot water use coaxial (bi-thermal) copper heat exchanger. It tubing for heating water for household needs, goes inside the pipe heating the coolant, which in turn is heated by contact with flue gases. Scum - the worst enemy of most flow heaters - in this heat exchanger is delayed very slowly. Household water is pumped through the inner tube bithermic heat exchanger, heat from the coolant, which excludes its boiling and, consequently, an intense accumulation of salts. When closing the hot water tap includes automatic pump heating system, and he, driving coolant on the outer tube heat exchanger, it cools quickly, which prevents the formation of deposits after use of hot water. Yet more often used for heating water using heat exchangers, stainless steel, such as model Vitopend 100 WHOA (Viessmann). At the beginning of the draw-burner and includes circulating pump heating system two-circuit wall of the boiler, but the water from the contour of the primary heat exchanger is not directed into the radiator, and the plate heat exchanger, providing rapid heating chase him through the cold water. Method of heating a plate heat exchanger has one serious drawback, which is often silent salesmen. Cold water flows through a narrow gap (1 -3 mm) between the plates. The narrower the gap, the higher the heating rate, but at the same time the gap quickly overgrown by salt deposits. When hard water complete coverage of the gap between the plates can occur within 2-3 months. The main method of protection against scale deposits - to prevent overheating of the water above 60 ° C, and this should take care of automation of the boiler. There are other ways. For example, in boilers Eura (Hermann) on the inlet pipe installed protivonakipnoe device - a permanent magnet, preventing formation of scale in the heat exchanger tank. In reality, water flow can sometimes vary greatly (it depends on how many points of water pumping is currently in use). If the bathroom is not installed mixer with temperature control, then a sharp decrease of water consumption in the case of a system not equipped with temperature control two-circuit of the boiler can get burned, while increasing - to be under a cold shower. This problem is solved in boilers Logomax U022K/U024K (Buderus), Therm 28 SG (Thermona), etc. With the management capacity of the burner with a special "impeller" in the loop of hot water supply (frequency of rotation depends on the amount consumed at any given time the hot water ) boilers provide accurate maintenance of a given water temperature. Whole sea wall bypass boilers with built-funded heaters made of stainless steel or plastic more expensive to operate than their "brothers" with the flow heater (gas consumed in the constant maintenance of a sufficiently high temperature water in the tank), also require more disk space for installation . However, if a user in the first place - the comfort of hot water, then the choice is to stop on them. This, for example, Logomax U052T/U054T (Buderus)-tank of 48 liters, New Elite 60 (Ferroli) -60 l, Planet 25-30/60 (Sime) - 60 liters. Interesting model Vitopend 222 (Viessmann) with the boiler at 50 liters. Maximum power for heating the coolant it is 24 kW, and the preparation of hot water consumed up to 30 kW. Heated water in the boiler is often carried out by immersing it in a spiral tube heat exchanger, which under the recognized need for an automatic boiler water heating for domestic hot water with the help of three-way valve sent water from the heating circuit. For the line hot water in the boiler wall bypass may provide additional pump (Model 60 New Elite, Ferroli). Data on water temperatures are typically displayed on the LCD display is rendered on the front panel. Capacity of the boiler, embedded in a modern wall bypass boilers, as a rule, is 45-60 liters. The user can dispose of this stock at any time and use it with any intensity. Water is likely to be enough to meet most of the traditional chores. Rinsing dishes in the kitchen rather 5-15 liters, for washing in the shower one man - 10 - 30 liters. Pause for heating another portion of hot water are unavoidable only if you have several household and all are cleaned after each other. However, the water will have to wait long: the tank is heated to the desired temperature quickly. What do you do when the hot water you need more than a force to prepare a traditional double-circuit boilers? In the first place - search appliance with a volume tank. For example, dual boilers Hidrocomfort (Frisquet) be equipped with a boiler at 80 and Jan. 20 liters. At a flow rate of 20 l / min and temperature of the water inlet 15 ° C and outlet 40 ° C boiler with a tank of 120 liters enables you to immediately after the opening tap to obtain 450 liters of hot water, then took a break of 10 minutes - 400 more l. If this is not enough, it is worth thinking about connecting to the boiler of a sufficiently large external tank. It is true, then we need to purchase a set of migration and the actual water heater. It is advisable to have your wall-mounted double-pressure boiler with integrated hot water heater had an anti-Legionella - the bacteria that are harmful to human health. Boiler (including the lower part of it) should be periodically heated to a temperature above 60 ° C.