We make an economical homemade water heater. Do-it-yourself indirect heating boiler from steel parts How to make a coil for a water heater with your own hands
Boiler indirect heating done with your own hands in accordance with standard scheme, which necessarily takes into account all technological features and characteristics of reliable and durable water heating equipment.
Let's consider the design and operating principle of such a device in more detail.
Modern ones are especially popular these days. electric boilers storage type, which are perfect for permanent or periodic operation, both in private households and in apartment buildings.
Standard volume storage tank may vary and is selected based on the number of consumers.
This type of household water heating device connected to the water supply directly after the main pipeline system, which makes it possible to provide hot water several parsing points. Additional options in such a water heating device they are represented by special thermostats.
The structure of a traditional boiler is represented by an outer casing and a standard internal storage tank, as well as a durable anti-corrosion coating and additional components.
Diagram of a homemade indirect heating boiler
The standard design of a water heating device in the form of a boiler may have significant differences depending on the type and design features. Indirect heating devices are not capable of independently producing thermal energy, but can be equipped with built-in heating elements, through which the water temperature is effectively maintained within predetermined limits.
The device diagram assumes the presence of the main components in the design, represented by:
- storage tank;
- outer casing;
- thermal insulation;
- heat exchanger;
- space for connecting additional heating element;
- inspection hole;
- cold water inlet;
- input and output for thermal fluid;
- thermometer connection point;
- recirculation line;
- outlet for hot water;
- magnesium anode.
A heating element with a supplied coolant is built inside the insulated tank. Cold water enters through the lower part of the tank, and hot water is taken from the upper part.
Water heating equipment of this type is equipped with a protective magnesium anode. The most modern and expensive models are equipped with a pair of redundant coils. Maintenance temperature regime is provided by a heating element with a thermostat built into the upper part of the tank.
Heating diagram for two types of boilers
Boilers with an indirect heating type are also produced, completely devoid of a coil. This special design is called a “reservoir in a tank”, which is due to the presence of a second tank inside one tank. Water heating in such water heating devices occurs inside the tank, and the coolant moves between the walls.
Factory models of heating boilers indirect type and a circulation pipe are equipped mandatory elements, represented by a magnesium anode and a safety group, as well as a temperature sensor.
How to make an indirect heating boiler with your own hands - manufacturing procedure
To independently manufacture a large storage tank (tank), independent of energy sources, a tank made of corrosion-resistant materials, as well as a spiral-shaped tube with a circulating coolant, are used.
Boiler in the boiler room
Uniform heating of the water inside the boiler tank is ensured by the movement of the coolant from the heating system, and a high-quality heat-insulating layer contributes to maintaining the temperature regime. Ease of use is due to the installation of special fittings in the form of ball valves.
Selection of capacity
A reservoir or storage tank can have almost any size and volume. The second criterion directly depends on the number of consumers and standard hot water consumption. As a rule, hot water consumption is about 50-70 liters per consumer, so the approximate volume of the tank for a family from four people is approximately 200 l.
Boiler tank
It is important to remember that the volume of the tank can vary significantly depending on the number of consumers and serviced hot water points.
Making a tank
To make your own tank for a water heating device, it is recommended to use stainless steel sheets, as well as alloys based on aluminum or other materials that are sufficiently resistant to corrosion.
As alternative option regular can be used gas cylinder, the walls of which must first be cleaned and primed, which will prevent the appearance of unpleasant odor in hot water.
Homemade indirect heating boiler tank
Five holes should be made in the prepared tank, a couple of which are made on the side and are used to install the coil, and two in the lower and upper parts for cold water inlet and hot water outlet.
To make the operation of a hot water boiler trouble-free without using the heating system, it is necessary to install a heating element, for which you need to drill a hole in the lower part, providing it with shut-off fittings or ball valves.
Thermal insulation
In the category of the most affordable and highly effective heat-insulating materials include modern foamed polymers, represented by polystyrene foam or polystyrene foam, as well as polyurethane foam and polyisocyanurite.
When using heat insulators of this type, it is mandatory to use a sealed protective casing, completely eliminating the entry of toxic fumes into the room.
It's important to remember that the best option is the thermal insulation of the storage tank - basalt wool, having density indicators in the range of 35-50 kg/m 3.
Coil manufacturing
To independently manufacture a round steel coil, a pipe bender is used, but if necessary, a square heating element is installed, all parts of which are represented by sections of stainless steel pipe connected by electric welding.
The heating power level is calculated according to the formula: Q = K x A x dT, where the indicators are presented:
- K - thermal transfer coefficient;
- A - area of the total surface of the heating element;
- dT - temperature difference between the coolant and the heating water.
The coil can be placed both in the central part of the tank and along its walls.
The configuration and dimensions of the tank affect the total number of turns, as well as the diameter of the heating element.
During the operation of water heating equipment, there is an accumulation of scale and various deposits on the heating element, therefore periodic cleaning of the coil is a mandatory maintenance measure for the boiler.
Final assembly
Process self-assembly water heating device consists of the following step-by-step measures:
- coil installation;
- soldering pipes on inlet and outlet pipes;
- welding of support legs or hanging loops;
- installation of a heating element;
- tight fit of the lid.
It should be noted that special attention should be paid to thermal insulation of the tank with basalt mats and their fixation on the surface of the outer walls.
To make the operation of the water heating device completely safe, it is necessary to screw on a protective steel casing covered with powder paint or galvanized.
Connection
On final stage The heating element is connected to the heating system circuit in accordance with the standard diagram. Then you need to connect the input and outlet pipe, as well as make wiring to all water distribution points.
Possible connection diagram for an Omicron indirect heating boiler
Before you begin testing the performance of your self-made waterheating device, you should check that all elements are connected correctly.
The main stages of boiler manufacturing are represented by preparing a suitable container, making a coil, providing thermal insulation and assembling the device, including connecting the coil to the heating system, organizing the supply of cold water and the output of hot water.
Video on the topic
Sometimes a homemade water heater is great option save on the necessary expensive equipment. It can be used as a temporary option in case of breakdown of old equipment, or on a permanent basis, for example, V country houses , where the need for hot water is seasonal. Of course, for constant water supply in a private house or apartment, it is best to use factory systems. The manufacture and installation of a homemade device for heating water does not require special experience; anyone can make it. The main thing is availability required material and tools for work. So, how to make a water heater with your own hands?
Of course, self-made pressure storage water heaters, designed by yourself, will be more convenient to use. But their assembly requires additional investment and knowledge. Such systems must be equipped circulation pump to maintain a pressure of 1 atm or connect to a water supply system already installed in the house.
If the budget is limited and there is no opportunity to purchase something like this optional equipment, or there is no water supply system in the house at all, you should pay attention to the non-pressure option. You can make such a water heater with your own hands from an ordinary bucket or large-capacity pan. The main thing is to mount such a device higher so that water runs out of it under the influence of gravity. But you will have to constantly monitor the filling of the storage tank and the water temperature.
Because in such homemade device It is difficult to provide a mixing system; the water should initially be heated no higher than 40 degrees.
What to make a storage tank from
Before making a water heater, you need to decide on the design features of the future boiler. Most often, this storage capacity with a heating element installed inside it, which is responsible for heating the water.
For storage tank It is better to choose containers made of corrosion-resistant metal. The most suitable options: stainless or enameled steel, high-quality plastic, aluminum. You can also use iron tanks, but they will have to be pre-treated with a special protective composition, which minimizes rust formation. Otherwise, the water passing through such a heating device may not be suitable for domestic needs.
For homemade storage water heaters use the most various containers, as an example we can mention a gas cylinder. This is a fairly convenient tank in size, shape and strength.
How to make a water heater from a gas cylinder
Ideally, a new vessel will be purchased for this. If this is not possible, use a used cylinder. To get rid of the smell of gas, it should be carefully treat with nitro primer and rinse inner surface. To do this, the cylinder will have to be cut first and then welded again.
It is worth paying special attention that before performing work that will involve violating the integrity of the cylinder, it must be filled with water to prevent the possibility of an explosion.
Tools and materials:
- welding machine and a drill for metal;
- metal-cutting tool for applying threads (die);
- screwdrivers and gas wrench;
- empty gas cylinder;
- heating element with thermostat;
- insulating composition for heating element (lubricant or tow);
- metal eyeliners;
- nut, safety and check valve s;
- fasteners for fixing the finished boiler.
Manufacturing instructions.
The DIY water heater is almost ready. Now the completed device can be filled with water and checked for leaks. If all is well, you can connect the heating element and use the device.
Economical DIY water heater
The constant increase in electricity tariffs forces many consumers to switch to saving mode. A good option is a DIY storage boiler powered by solar energy.
To make it you will need:
- large volume storage tank (100-200 liters);
- PVC pipes and hoses for water supply;
- fasteners.
Instructions on how to make an economical boiler for a summer cottage:
- holes are made in the storage barrel for pipes;
- hoses are connected to them;
- the capacitive tank is installed in a sunny place protected from the wind;
- water supply is organized (this can be a hose connected to the water supply);
- conclusion is made to the tap or outdoor shower.
Under the influence sun rays the water in the barrel heats up and can be used for your needs. This practical option for organization summer shower on his own garden plot. Often such barrels are installed directly on the roof of various buildings. To make the most of natural energy and achieve maximum efficiency from such a device, next to the reservoir in which the water is located, reflective elements(for example, the remains of a foil backing for a laminate), or the tank itself should be painted a dark color.
If desired, anyone can make a water heater with their own hands. The main thing is to think ahead design features equipment, select suitable materials and secure the water heating system.
Do you think it’s enough to choose the right water heater? For successful operation, it is equally important to connect it. In this article you will learn how to piping an indirect heating boiler. Our recommendations will help you carry out the installation so that the equipment works as efficiently as possible and does not break down.
Types of water heaters and their operating principles
Unlike models that run on electricity or gas, an indirect heating boiler (IBC) operates thanks to an external heat source. If the system is connected to heating, then the coolant warms up due to solid fuel. This approach helps in winter time, and what to do in the summer, when heating season finished?
Manufacturers produce combined systems: an additional heating element is placed in the tank, which can be powered by electricity or a solar collector. , read in a separate publication.
There are two types of water heaters:
- managed;
- without control.
The first ones are more expensive and easy to use, they work automatically. All that is needed:
- Connect the hot water inlet and outlet.
- Organize the supply of cold flow to the tank.
- Install a liquid distribution device.
Even equipment with a thermostat cannot heat up more than the coolant allows. For example, the boiler heats up to 40 degrees, which means the coolant will heat the water by a maximum of 40 degrees.
Devices without control operate automatically, depending on the boiler parameters. You will have to install the temperature sensor yourself and connect it to the heating system. After which the strapping is performed, which we will discuss in detail below.
When choosing, pay attention to additional functionality - it may be useful during operation. More expensive models can be equipped accumulation system. Thanks to improved insulation and a large tank volume, the liquid retains heat well in the absence of electricity.
There are also devices with recycling. Fast heating is provided by three pipes. A hot stream moves along two of them, and a cold stream moves through one. An additional pipe can be used to connect clothes to the dryer.
Features of tanks and their installation
There are also indirect water heaters. Wall-mounted ones reach a capacity of up to 150 liters. The shape of the tank is most often round. They are mounted on special brackets that are included in the kit.
Tanks with a displacement of 200 to 1500 are installed on the floor. They have side or rear hose connections. The base is often supported by legs. For large equipment you will have to allocate a separate room.
The nuances of installing and tying the device
It is best to wire the water heater together with the installation of the boiler and other equipment, rather than embed the device into an already ready-made system. There are two basic connection principles:
- With priority. This scheme requires a powerful boiler. It provides rapid heating of the tank contents by pumping the entire volume through the coil. This way, hot water enters the radiators, which prevents the temperature from dropping.
- No priority. It is characterized by prolonged heating, since not all water passes through the coolant.
Tying rules:
- Choose a place to install the tank as close to the boiler as possible. This way you can reduce heat loss.
- Installation must be carried out on a flat and durable surface.
- For normal functioning systems at the water heater outlet need to be installed expansion tank. It neutralizes thermal expansion.
- Each individual device (circuit) must be equipped with taps. This will allow you to turn them off individually, regardless of the rest of the system.
- Installation required.
- To reduce water hardness, .
- Do not place tanks larger than 150 liters on the wall, especially if it is made of plasterboard.
How to tie a boiler
There are several strapping schemes, which we present below. Choose the one that is most convenient for you.
Forced circulation and three-way valve
The diagram is suitable for piping or with a boiler. If on this moment The gas boiler is already installed, place the BKN nearby. A circulation pump is mounted on the supply. After which a three-way valve is connected, which is controlled by a temperature sensor.
A tee is cut into the inlet pipe in front of the housing, to which a hose is connected to drain liquid from the heat exchanger. How it works:
- As soon as the temperature sensor informs the control board that the temperature has been reduced, the valve turns on the water heater coolant. The heating system starts up.
- The coolant contents pass through the heat exchanger and are heated in the tank.
- As soon as the heating reaches the set temperature, the valve switches operation to heating.
Convenient diagram for regular use of the water heater.
Using two pumps
If the BKN is installed at a great distance from the boiler or you rarely use it, it is better to include a circulation pump in the system.
Connection diagram to an automatic boiler:
One pump is mounted on the inlet pipe, and the other on the heating body. Tying is done using tees, without three way valve. The thermostat controls the start and stop of the pumps.
Non-volatile boiler
For this scheme it is better to use wall models, since the boiler must be located higher than other appliances.
Installation of a floor model is also possible. But in this case, the water will heat up more slowly.
Priority is provided by a large circuit that is supplied to the water heater. It should be one step larger than the one supplied to the heating system.
Temperature and flow switching are provided by a thermostatic head with a sensor. The desired indicators are set on it. If the sensor shows that there is cold water in the tank, heating is switched to the boiler - and vice versa.
Application of hydraulic connection
Suitable for installations with multiple circuits and large tank volumes. Similar schemes are used in apartment buildings, when in addition to heating it is necessary to provide, for example, floor heating.
The hydraulic distributor (hydraulic arrow) helps distribute the pressure so as to avoid thermal shock. Doing installation yourself is risky; it is better to contact a specialist.
Recirculation equipment
If you want to turn on an additional heating device, a towel dryer, you need to organize the connection so that water constantly circulates in the pipes. You can immediately buy a device with a recirculation function or turn it on using tees. However, such a connection has negative aspects:
- High consumption of electricity and fuel. As the water passes through the dryer pipes, it cools, so the device needs to be turned on more often.
- Mixing layers. During normal operation, hot liquid rises to the top. The flow that comes out of the pipes mixes the layers, and at the exit you get a liquid at a lower temperature.
Connection steps
Do necessary calculations, mark the layout of the pipes and the installation location of the boiler and boiler on the floor plan. Prepare a solid foundation for the water heater, especially if it is designed for large volumes. Next, do this:
- Carry out the wiring, marking the locations of the hot and cold pipes.
- Install the tee, safety valve. The latter allows you to get rid of excess pressure.
- Seal all connections securely.
- Connect to electricity and install an RCD.
- When finished, adjust the thermostat settings. Perform a test run.
Observe connections and pipes. There should be no leaks or suspicious noise. Remember that the heat source can be not only the boiler, but also solar collector. Sometimes installing it is much more profitable.
To finally understand the principles of strapping, watch the video
Utility services annually “delight” users by turning off hot water supply. Therefore, many have switched to individual water heaters - some even make a boiler with their own hands. How to do this, what to consider, how profitable the work is, read our article.
Is it worth making a homemade water heater?
To find out, you need to calculate the feasibility of the installation. Perhaps it's better to use the factory one?
Do the math. To do this you need to consider:
- The price of hot water is 1 cubic meter approximately 200 rubles.
- Heating temperature - 65 degrees.
- The heat capacity of water is 4200 J/kg.
- The liquid inlet temperature is 8° in winter.
Calculate using the following formula:
A = 4200*(65 – 8)*1000 liters = 239.4 MJ
N = A/t = 239.4 MJ/3600 = 66.5 kW
Result: homemade device It would be unwise to install it in a house or apartment. It is cheaper to pay for utility services.
However, it may be suitable for summer use, because the liquid at the inlet will no longer be 8 degrees, but 15°C. Do the calculation:
N = A/t = 4200*(65 – 15)*1000 l = 239.4 MJ /3600 = 58 kW
Consider:
- Heating from utility companies does not always correspond to the stated 65 degrees. Most often it is 58-59°C.
- In the same time homemade tank has heat losses that need to be remembered.
Conclusion: A homemade water heater is not suitable for constant use in an apartment - it is not profitable. Easier . But for a dacha and a summer shower - an excellent option.
Type of fuel
The operation of the equipment is based on the coolant. What are they like:
- Gas water heater. These are the most economical devices, however, self-production Absolutely forbidden. Firstly, it is life-threatening. At factories, equipment goes through many tests and checks before it reaches the store. Secondly, even after making the heater, you will not receive permission to operate it. Moreover, you will have to pay a fine.
- Wood boiler(indirect heating). The easiest way: you can organize a small stove and install a boiler on top.
- Electric type the most secure. About him and we'll talk further.
Pressure or non-pressure option
It is better to choose a pressure-type storage electric water heater - you will get a strong continuous flow in the shower. But for self-installation organization will be needed circulation pump, which will create pressure in the system. This makes the task more difficult.
The non-pressure option works easier. To create it, you can choose any container: a bucket, a pan. The main thing is to install the container higher so that there is a good flow of water.
The disadvantage of non-pressure systems is the impossibility of uniform mixing of cold and hot liquid. Therefore, you need to heat it up to 40 degrees and use the contents immediately.
What to make a tank from
The housing is the basis of the future boiler. To create it you will need a material that is resistant to corrosion and rust. You can use stainless steel, aluminum, plastic. Iron is also used if it is treated with a special protective paint, otherwise the water will be of little use.
Important! If you want to make a tank yourself, you will need a welding machine, as well as experience as a welder.
As a result, water will accumulate in the container and be heated by the heating element. You can take ready-made tanks: for example, make a body from a gas cylinder or plastic barrels.
How to make a water heating tank
It is best to install a new cylinder for a water heater. First, prepare everything you will need for work:
- Welding tool.
- Carving tool.
- Gas keys.
- Screwdriver Set.
- Drill.
- Balloon. If you are purchasing a new one, choose one without a valve. You won't need it, and the product will cost more. If you are using a used version, treat the walls with a nitro primer to remove residual gas.
- Nuts 3.2 cm.
- A heating element. Choose a heating element with a thermal relay and low power.
- Tow or grease.
- Heat-resistant plastic pipes.
- Wiring and terminals for organizing connections.
- Stopcocks.
Stages of manufacturing at home:
- Prepare the balloon. Cut it lengthwise by welding, carefully treat the inside with nitro primer. Now all that remains is to weld the tank.
- In a clean container, make two holes with a drill: from the bottom to take in cold water, from the top to drain the heated liquid. The location complies with the laws of physics, because hot water rises.
- Weld the tube to the holes. If both outlets are located at the bottom, then the hot liquid tube should be the length of the housing.
- Install taps on the pipes. Connect a check valve to the cold one; it will help prevent the contents from draining into the sewer. A safety valve is installed on the hot one, which will prevent the pressure from rising to a critical level.
- On top, where the gas valve was located, you need to install a heating element. Secure it with 32mm nuts. Insulate the element with tow or lubricant, then secure the thermostat.
For ease of use, you can install an LED. This way you will know when the heating element turns on and off.
- To get a super-efficient boiler, you need to insulate it. There is a simple way to do this: select a metal layer with an area slightly larger than the body. Insert the finished body into the prepared sheet cylinder. Fill the remaining space thermal insulation material: isotone, polyurethane foam. Covers are welded on top and bottom.
- To install, connect metal connections to the pipes. Hang the device in the intended place - take into account its weight when filled.
All that remains is to perform a test run. To do this, the tank is filled with water and inspected for leaks. If everything is in order, you can connect the heating element.
A storage heater can be made quite simply if it is powered by sunlight.
Prepare for the organization:
- Tank for 100-200 liters.
- Hoses, pipes for water supply.
- Corners for creating a frame or other fasteners.
Implementation of plans:
- Make holes in the tank.
- Connect pipes and hoses to them.
- Secure the structure in a windless place so that it is constantly exposed to sunlight.
- Take care to fill the water. A hose from a well can be used for this.
- Organize a shower outlet.
To enhance heating, the barrel can be painted black. Arrange foil panels near the structure. They will reflect heat onto the barrel, allowing the contents to warm up by 40 degrees.
No free container or barrel? Then use plastic bottles. Setting up a functioning system is simple. You will need:
- bottles;
- sealant;
- taps;
- drill.
Proceed sequentially:
- At the bottom of each bottle, make a hole the diameter of its neck.
- Insert the bottles one into the other until you have a battery of 10-12 pieces.
- In total you should get five or more stripes.
- Seal all connections.
- Install a tap on top, at the entrance. Do the same at the bottom exit.
- Organize a water supply or install containers.
Install the system on the roof for better heating. Depending on the size, the structure will provide warm water for 2-3 people.
A homemade water heater is an excellent way out. In the summer, you can take a shower at the dacha, and if you make a device with a heating element, then it will help you out at any time of the year.
Even residents of apartment buildings supplied with hot water face the problem of lack of hot water. centralized system hot water supply.
If the owners of private houses did not take care of installing a double-circuit boiler that provides the cottage with both heat and hot water, then they begin to look for a way to get a sufficient amount of heated water for economic needs.
Even in ideal When the house is gasified, installing a gas water heater does not always completely solve the problem of obtaining hot water in sufficient quantities.
It takes some time for hot water to appear in the tap, and when using a shower, the water temperature can drop sharply if you start using the water tap in the kitchen. These disadvantages are always characteristic of instantaneous water heaters, where water is heated using gas or electricity.
When using an indirect heating boiler, such problems do not arise, since they The device allows you to keep the water temperature constant.
If you calculate the cost of obtaining hot water when using instantaneous water heaters and compare it with the costs of heating water with indirect heating boilers, it is obvious that the operation of the latter costs consumers much less.
However purchasing such an industrial water heater will cost a considerable amount. Usually required volume construction is calculated based on the number of people living in the house. One person will need at least 50 liters of hot water per day.
For a family of four, you need to purchase an indirect heating boiler with a minimum volume of 200 liters. Depending on the manufacturer, the purchase of such a model will cost home owners 35-45 thousand rubles.
Since its design is not too complicated, many homeowners make the device themselves.
Operating principle of an indirect heating boiler
Before you start making such a heating device, you should understand how it works, and to do this, study its structure. An indirect heating boiler is a regular tank with pipes inside. Coolant circulates through them.
The heat source can be a heating system. Water is supplied inside the tank, gradually heating up to a temperature determined by the parameters of the coolant. Since water for household needs is drawn from the top of the tank, its temperature remains stable and it is convenient to use heated water.
Thus, it is possible a private house, where available heating system operating on any type of fuel, provide sufficient hot water. An indirect heating boiler can also be used in multi-storey buildings by connecting it to the heating system.
True, it will function only during the heating season. In order for the device to be used in the absence of heating, an electric heating element is added to the design, plugging it into the network as needed.
Types of homemade indirect heating boilers
In the most popular design option, a coil made of a metal pipe is used to pass the coolant. The coil is placed in a tank, the container is filled with water, and then the coolant is passed through.
When cold water in the tank comes into contact with the coil, it heats up. If pipes with coolant are placed along the walls of the tank, the storage boiler will not work worse.
Home craftsmen are constantly coming up with new device designs. There is an option that allows you to do without coolant pipes. In this case, use two containers having different diameter. They are inserted into each other, cold water is supplied to the smaller one, and space is allocated for the coolant between their walls.
However using a coil gives faster water heating, since a pipe of this shape is longer, and this makes it possible to use the coolant more efficiently. There are other designs, but the ones described above are the easiest to make yourself.
Materials and parts required for the manufacture of a boiler
First of all, you need to select a container for making the tank. The best choice of material is stainless steel. You can use a ready-made barrel, order a tank required size, or purchase a gas cylinder. It has sufficient strength, suitable dimensions and shape. Another option for making a tank could be a container made of heat-resistant plastic. 
Holes of the required size should be made in the tank. Two holes will be needed to connect the cold water supply and hot water supply pipes. One of them is done at the bottom of the tank, and the other at the top of it. Two more holes will be needed for the installation of a coil intended for the passage of coolant.
For coil manufacturing A tube made of brass or copper is perfect. These materials transfer heat well and can be easily shaped into the desired shape. You can also use small diameter plastic pipes.
In order to make a coil, a pipe of the required length is wound onto a base, which can be strong metal pipe or rounded log.
In order for the tube intended for the coil to be bent evenly, without creases, it is completely filled with sand before starting work. Then the coil will turn out correct form, the same diameter along its entire length.
Often, novice craftsmen do not know how to correctly calculate the dimensions of the coil. Its parameters depend on several factors - you should take into account the volume of the container, the material of the coil and the temperature of the coolant. It is believed that For every 10 liters of water volume, 1.5 kW of thermal power is required for heating.
Based on the volume of the tank, the temperature of the coolant and the temperature of the incoming water, it is calculated required length coil To do this, use a special calculation formula. For a container with a volume of 200 liters, when using a coil with a diameter of 10 mm, its length will be about 15 meters.
Even before installation storage boiler it is necessary to decide how its thermal insulation will be carried out. It will not be possible to do without it, since natural heat losses are high and the efficiency of the water heater will be too low. To thermally insulate the tank, place it inside a suitable container, and then fill it with polyurethane foam.
To assemble the boiler, you should ensure that you have fittings, nuts, rubber seals, ball valves. When making a structure from a gas cylinder, welding equipment will be required.
Watch a video on how to make an indirect heating boiler with your own hands:
Installation procedure
Installation of an indirect heating boiler, in which the coolant is supplied through a coil, begins with its installation. A thread is cut at the ends of the coil, onto which a lock nut is screwed, and then they are inserted into the prepared holes in the tank so that the lock nuts have a stop.
The threaded part of the coil should extend beyond the surface of the tank. Rubber gaskets are put on them, and threaded couplings are screwed on top of them. As a result of these manipulations, the coil is securely fixed, and it becomes possible to connect it to the heating system.
The next stage of work is connecting the tank to cold water and discharging the hot water tap to the required location. The final part of the installation will be insulating the water heater, but before that you should check the tightness of all connections.
In this way, you can provide your home with sufficient hot water from minimal costs. The cost of purchased materials will cost a small amount, especially if you compare it with models made industrially. The price of a factory-made boiler starts from 20 thousand rubles for models from Drazice OKC.
Video on how to properly connect an indirect heating boiler with your own hands:
