Universal devices for heating a private house or apartment are popular. 2 circuit gas boiler is used to heat the room and to obtain hot water supply. For the correct choice of units, you need to consider their characteristics.
Principle of operation
The 2-circuit boiler operates in 2 modes: heating and water heating. However, the device cannot perform these functions at the same time. The first burner start in heating mode is characterized by a long operating time, since the temperature of the coolant in the circuit must rise to the set values. As soon as the liquid is hot, the fuel supply is cut off. If the room has a temperature sensor, the burner turns on and off automatically.
The movement of the coolant is provided in a natural way (due to the pressure difference) or by a circulation pump. Combustion products are removed through a chimney or through a fan. To turn on the water heating, you need to turn the tap valve. The fluid heats up in 5 seconds. In this case, the heating circuit does not work.
System adjustment in this case is carried out by a three-way valve. This device redirects a certain amount of heated water into the secondary heat exchanger. From it, the temperature of the remaining liquid rises.
Characteristics
Gas-fired boilers 2x have the following characteristics:
- power: from 10 to 280 kW;
- heating area: from 100 sq.m .;
- Efficiency: from 90%;
- type of heat exchanger: aluminum, copper, stainless steel;
- type of chimney: natural, coaxial.
Most models of such boilers require an electrical connection.
Types of 2 loop gas boilers
There are mounted and floor boilers. They differ in the place of installation, as well as in some characteristics.
Wall
The wall-mounted unit is a complete heating system that does not take up much space. It is most often installed in an apartment or in a private house, if the room is small, and it is not possible to equip a separate boiler room. It does not need additional equipment for stable operation. Such devices have an attractive design, but they are unstable to voltage surges.
Floor
The floor version is designed for heating rooms with an area of more than 300 sq.m. At the same time, the user himself can choose a heating system depending on his needs. Often, such a unit requires a separate room, but there are small models that are mounted in the kitchen. Such boilers serve for a long time, are autonomous and do not depend on power surges.
Boiler elements
Before using the unit, you need to consider its device. The boiler consists of the following elements:
- Burner. It is located in an open closed combustion chamber. This part provides heating of the coolant and is a heat generator for hot water supply.
- The combustion chamber.
- Circulation pump. Thanks to him, the coolant moves in the system.
- Three-way valve. Provides switching of water heating and heating modes.
- The main heat exchanger. Location - under the burner. It heats up the liquid.
- Secondary heat exchanger. It is necessary for the preparation of hot water.
- Automation. Thanks to it, the parameters of the heating equipment are regulated.If a malfunction appears in the unit, the automation simply turns it off.
In the lower part of the device there are pipes for connecting pipes of the heating and water supply systems, as well as a device for removing combustion products.
Advantages and disadvantages
The use of double-circuit boilers has the following advantages:
- economical fuel consumption;
- noiselessness;
- the ability to install on the floor or on the wall;
- small dimensions;
- autonomy of functioning;
- Ease of Management;
- safety.
However, there are some disadvantages, for example, a significant flow of fluid at the start-up phase. The amount of hot water depends on the volume of the tank inside the boiler. For powerful floor models, the construction of an additional foundation or the equipment of a separate room is often required.
Selection rules
To choose the right device for your home or apartment, you need to consider the following parameters:
- total heated area;
- energy costs and maintenance costs;
- availability of additional functions;
- device power;
- type of traction.
When choosing, the heat exchanger material is taken into account, since the duration and quality of operation of the device depend on this parameter. It is better to give preference to the copper version, but it costs more.
User manual
Gas boilers are used for heating and hot water supply of apartments, private residential and country houses, public buildings. In this case, it does not matter at all whether the system is connected to the main gas pipeline, since the units can run on liquefied fuel, which is supplied in cylinders.
The manual for the use of gas equipment is a set of requirements and rules, compliance with which makes the operation of the device safe and efficient. Initially, the device is connected to the gas main, as well as to the pipes of the water supply, heating system, and the mains. The device is connected to the trunk only by qualified specialists who are authorized to perform such work.
If there is a need to replace parts of the device, only original spare parts are selected. When a malfunction occurs, the unit immediately disconnects from the gas supply. Any service work to eliminate breakdowns on your own is prohibited. Before the start of the heating season, the condition of the chimneys and ducts is checked. When the equipment is turned off for a long time, the gas valve is shut off.
Do not use aggressive chemicals to wash the unit. Before turning on the boiler, you need to make sure that there is a coolant in the heating system, that the burner, the safety valve and automation are working properly. During operation of the unit, make sure that there is no smell of gas in the room. The burner is periodically cleaned of contaminants.
Popular manufacturers
When choosing heating equipment, not only its characteristics, but also the manufacturer are taken into account. It is better to choose the equipment of those companies that have good reviews and an impeccable reputation.
Ariston
Double-circuit gas boilers Ariston are made in Italy. The company offers a wide range of equipment characterized by modern automation and functionality. The specified technique has the following advantages:
- low power consumption;
- environmental cleanliness, safety;
- the main heat exchanger is made of copper;
- compactness;
- the ability to adjust the flame power;
- automatic ignition;
- multi-level security system.
Among the shortcomings, the need for periodic manual adjustment of the boiler stands out. In addition, it makes noise during operation.
Buderus
The manufacturer offers wall-mounted models of double-circuit boilers that are adapted to domestic operating conditions: pressure drops. The equipment runs on natural and liquefied gas. The heating system is quickly tuned for optimal functioning, the boiler has thermal and sound insulation, reliable automation. The devices stand out with their modern design and affordable price. However, the units do not have surge protection.
Hephaestus and others
Domestic manufacturer, highly reliable. Automation on Italian units, operates without failures. The devices are simple in design, so the controls are intuitive. The risk of breakdowns is reduced to zero, since the device has a minimum of auxiliary nodes. Hephaestus boilers are easy to maintain. Users can choose the device from floor or wall options.
Among other manufacturers are popular:
- Vailant. German company offering wall and floor models, turbocharged and atmospheric type. The power of devices ranges from 4-280 kW. High-tech equipment. The advantage of the unit is self-diagnosis. Efficiency - from 92%. The boilers have an ergonomic design. The maintenance of these devices is expensive.
- Baxi. The Italian company offers devices that are protected from pressure drops, freezing of the coolant, breakdown of a 3-way valve. Adjustment of the equipment is carried out in manual and automatic mode. Operation and installation are simple, automation responds to weather changes.
Gas double-circuit boilers are the best devices for heating houses or apartments of any area, with the additional function of heating water. Proper installation and compliance with the operating rules will increase their service life.
