What should you pay attention to when buying a floor-standing double-circuit gas boiler for heating a private house?

The need to use hot water and heat encourages the search for cheap energy supply and an efficient heating system.

Floor-standing double-circuit Gas boilers operate on relatively inexpensive fuel - gas.

Floor-mounted installations often indicate that the unit has high power, meaning it is capable of producing energy for large spaces.

The gas boiler must be powerful, safe, convenient in use and capable of withstanding more than one heating season. The boiler itself also has requirements. The unit must be installed in a separate, well-ventilated room and try to avoid using it at maximum power alone.

Double-circuit floor-standing gas boilers

Gas units with two contours It functions on the principle of alternating the supply of hot water to the radiators and to the taps. Water enters the device and passes through a heat exchanger.

Heating occurs due to the combustion of gas and the release of heat. After passing through heat exchanger, the liquid is directed into one of two circuitsSince the heating is constantly on, the water goes into it.

The hot water supply system (HWS) is used from time to time, so that the liquid flows into the taps, a special valve shuts off the water supply to the heating devices. But there are also gas boilers with built-in boiler — an independent water heating device. They are best installed in houses where hot water supply is used frequently.

Boilers are also divided into convection (direct heating of the coolant) and condensation (additional heating due to evaporation).

Technical specifications

The technical parameters of floor-standing gas heating boilers include:

• power;
• principle of heat release;
• energy dependence.

The power calculation shows what unit is needed for the room. This parameter is calculated using the formula: 1 kW per 10 m² area. But since it is not customary to operate heating boilers at maximum power in order to increase their service life, the device is purchased with a reserve 20%.

Photo 1. Floor-standing double-circuit gas boiler model KS-GS 5S, closed combustion chamber, manufacturer - Taiga, Russia.

In other words, for a house with an area of 300 m² a boiler with a capacity of not 30 kW, but 36 kW.

The principle of heat generation in a floor-standing gas unit depends on whether it is a convection or condensation boiler, and also closed does it have a combustion chamber or openIn a convection appliance, heat is directly transferred from the burning gas to the heat exchanger, and the combustion products and steam exit through the chimney.

In condensation, steam is collected separately special tube and is used for additional heat generation. This significantly increases the boiler efficiency and reduces fuel consumption.

Eat autonomous boilers and energy dependent. The first work without electricity.

This helps to save on expensive electricity and makes heating and water supply independent of possible power failures.

But security and control systems, as well as digital control components, require power supply. Their use is justified by the fact that it allows you to regulate the operation of equipment, reducing fuel consumption and creating a more comfortable microclimate.

Requirements for the premises

What you need to know about the rules for installing floor-standing gas boilers is described in SNiP 42-01-2002 "Gas distribution systems". The equipment is installed in separate rooms, as these are rather bulky units that require space and a well-thought-out ventilation system. This most often applies to devices with open combustion chamber.

Unlike closed-chamber systems, air enters open-combustion devices from the surrounding space, and combustion products are removed through chimney, so the room should be well ventilated.

If the boiler is designed for high power, it may be quite heavy.

This is relevant for units with cast iron heat exchangers, which already weigh a lot on their own, and together with boilers the weight increases up to several hundred kilograms. For such devices, a separate one is required. foundation.

For boilers with power over 60 kW installation rules require a separate room, or better yet, a separate building. It should have a permanent air vent, the installation area should be from 4 m², ceiling height - 2.5 m, and there is also a grounding circuit (for energy-dependent models) and a door of width from 0.8 m.

Because gas boiler operating permit issued by government agencies, it is better for the equipment to be installed by professionals. They should also be trusted with the boiler piping, which guarantees its proper operation, especially if we are talking about a dual-circuit system.

Gas equipment is strictly supervised, so the slightest deviation from the rules can block the use of a gas boiler in the house, even if it is the only source of heat. Experienced installers prepare the premises for installation and operation of the device, install the necessary communications, connect the unit and set up its operation.

Recommendations for selection

First of all, when choosing a gas boiler, you need to be guided by proven brand.

Price also matters, but the brand is more important, because if you have to look for spare parts or repair the device, well-known brands have service centers everywhere.

The spare part ordered from them will be delivered quickly, and the repair of the gas boiler will be done qualitatively. In addition, it is also important power device. Based on it, a suitable model is selected.

Floor-standing boilers are usually high-power equipment. From 60 kW for private houses to 3 thousand kW for large buildings. If this is an energy-dependent option, it is necessary that there is an electrical network at the place of its installation, and its resources are sufficient for the operation of the device. Otherwise, an autonomous boiler will be required, the operation of which does not require electricity, and the movement of the coolant through the pipes is based on natural circulation.

Among the factors that influence the choice of the unit are not only power, but also materials, And technology of the system operationFor example, they choose between boilers with heat exchangers made of cast iron and steel. The first last a long time (up to 30 years), have good heat transfer, but are heavy and fragile. Second stronger, more resistant to mechanical impact, but subject to corrosion.

Boilers with an open firebox take air from the room and require forced ventilation. Devices with a closed chamber and a coaxial chimney take air from the street and remove smoke there.

Features of operation

When using a double-circuit floor-standing gas boiler in a house, it is necessary to follow the operating rules.

Allowed:

• install the device in in a safe place in accordance with the recommendations for the placement of gas appliances;
• do harness, guided by the technical characteristics of the device specified in the instructions;
• configure the system operation according to required parameters and in full compliance with the set of functions included in the boiler;
• use only licensed equipment.

It is prohibited:

• change factory design the device even in minor details;
• reduce diameter ventilation openings in the room;
• store in the boiler room flammable items;
• combine the boiler room with residential premises.

Pros and cons for heating a private house

Advantages:

• high power;

  

• heating and hot water supply for large areas;
• cheap fuel.

Flaws:

• necessity separate specially equipped room;
• large sizes;
• high price.

In terms of heating and hot water supply of cottages and multi-family houses and even industrial buildings, it is unlikely that there will be anything more suitable than gas boilers. Especially if the building is located outside the city limits and there is a gas pipeline nearby.

Useful video

Watch the video which tells about the structure of a floor-standing gas boiler.

Troubleshooting Methods

Floor-standing dual-circuit devices supply hot water and heat medium-sized buildings using cheap fuel. At the same time, the units require a set of measures for efficient operation.

For example, after a long period of operation it may turn out that the boiler will not start. One of the reasons This can cause clogging of the nozzles where combustion occurs. To clean them, call masters, since such elements require careful handling.

Another malfunction is - insufficient or excessive traction, which occurs in devices with open combustion chambers.

IN first In this case, when checking, the flame of the match brought to the table does not tilt inward, but in second goes out immediately.

This problem can be fixed on one's own, adjusting the air inflow and outflow in the room. In addition, in winter, the draft can be hindered by a narrowing chimney diameter iceYou just need to scrape it off and the air exchange will be balanced.

More one common a malfunction is a case when the water does not heat up well and the room does not receive enough heat. This is directly related to the dual-circuit system, in which the valve shuts off the water supply to the heating system when the tap in the kitchen is opened and the liquid is directed there.

This problem can be solved by installing boiler or by purchasing a boiler with a built-in boiler, which will separately heat water for the DHW system. If the water is turned on very often, then this method is the only one an exit for the house to work fully both contours.