In the cold season, the issue of hot water supply becomes acute in places where there is no centralized one. Typically, these places include country houses and country houses. Installation of finished equipment will cost the owner relatively expensive. Therefore, many decide to make an indirect heating boiler with their own hands. This option is considered one of the most inexpensive and economical during use.
Principle of operation
Such units have a simple principle of operation, you just need to understand their device. So, the apparatus is a tank, inside which heating pipes pass. They supply heat transfer fluid to heat the room. While the liquid flows inside the device, the water used for household needs also heats up. That is why the device got its name. The coil is heated in two ways:
- connecting the system to a more powerful heating device (for example, a boiler);
- connection to the central heating system.
There are several options for such tanks:
- The most popular is the use of a metal coil inside the tank, made from a pipe of small diameter. Water is drawn into the vessel, which heats up upon contact with the bent component in which the coolant flows.
- Pipes can be placed not in the center, but next to the walls. The system is no different anymore. This option is considered even better, since the area of u200bu200bcontact between water and the curved element is larger.
- Not tubes are used, but containers with different diameters. They are located one inside the other. Liquid for household needs is collected in the smaller one, and the coolant is supplied to the space between the walls.
Before you create an indirect heating boiler with your own hands, you must definitely consider all the positive and negative sides.
Such units have a lot of advantages:
- reduced use of energy resources;
- reduction of operating costs;
- available materials for production and their minimum quantity;
- The water temperature is always maintained at the same level.
Despite the obvious advantages, such devices have a number of disadvantages:
- for large units, you need to allocate a separate room;
- heating a large volume of liquid takes longer, while the temperature in the house rises more slowly;
- the rapid appearance of deposits in the tank and on the coil, which must be removed mechanically or chemically at least twice a year;
- the problematic repair of internal components — more often it is just a replacement.
Creating a boiler
- From the very beginning, a container is prepared, which will act as a tank. You can use any stainless steel vessel, even non-sealed ones. To work with it, you need a welding machine. It should be noted that glass-ceramic and enameled vessels wear out quickly with such use and require replacement. Therefore, it is better to stay on stainless steel. The most popular is the use of a gas cylinder. It is cut into two halves, cleaned, primed and welded back. Of course, this can not be done, but then the water will smell of gas for a long time.
- Then you need to make high-quality thermal insulation of the walls of the tank. This is done using different materials: polyurethane foam, glass wool or any other insulation. In order for the insulation to perform the necessary functions, the entire surface must be covered. Often an additional tank is used for this. The container is installed in a large one, and insulating material is placed between them.
- Coil. It is made from a metal pipe of small diameter. It is wound around a cylindrical object. Another pipe of a much larger diameter is best. Threaded fittings are attached to the ends of the resulting spiral. Do not make the turns too tight to each other, as it will not be convenient to remove and mount it back. And this will need to be done at least a couple of times a year.
- After preparation, the time comes when you need to assemble the boiler with your own hands. So, two holes are made on the tank: for cold water from below, and for hot water — from above. This is due to the physical law that hot masses always rise up. Cranes are mounted on the holes. In addition, you also need to make another hole at the bottom — for the drain pipe. This will help, if necessary, quickly remove all the water from the tank. After that, two more holes are cut into which metal fittings are installed. The coil will be attached to them.
- After assembly, the entire system must be checked for leaks. This is best done carefully. Firstly, this is the only way to achieve the optimal level of heating of both systems. Secondly, if oil or the same antifreeze is used in the system, problems may arise when using water for household needs. Not to mention the failure of some components or even the entire structure. To check, you need to coat the coil with soapy water and let the air inside. The same must be done with all connections.
- The top of the tank is closed with a lid with a rubber gasket. It is also insulated.
Interesting! There are options for mounting even a plastic container, but it should only be made of food-grade PVC. In addition, problems may arise in case of unforeseen contact with the heating surface.
After that, it remains only to install in the system. You can use.
As you can see, everyone can make their own indirect heating boiler. It is considered an economical option not only during manufacture, but also during use. Such a system allows you to have heating in the house, and for small energy costs to get warm water for household needs. In this case, the volume of the tank can be made based on needs.