A simple electric boiler for periodic switching on. Electric boiler connection diagram: options. Electric boilers for private use: reviews and cost

Greetings, comrades! Do you know how to connect an electric boiler to electricity? Are you interested in what elements should the boiler piping include? Today I want to answer these questions in detail and as clearly as possible and tell you which electric boiler connection diagram will allow you to heat your home at minimal cost.

Tasks

Before undertaking any project, you need to clearly formulate its goals. Here is their list.

Safety

It consists of three components:

1. Reliable automatic shutdown . The electrical circuit must prevent electric shock to the user and ensure that the power is turned off if short circuit;
2. Correct wiring calculation. When the boiler is operating full power it should not be heated: high temperatures can damage the insulation. This is especially important when hidden installation wiring;

1. Coolant pressure control. As the temperature of water or antifreeze increases, their volume increases. In a closed loop this means fast growth pressure that threatens pipes and radiators. The boiler piping circuit must prevent exceeding the critical pressure;

For a closed (that is, not communicating with the atmosphere and operating with excess pressure) autonomous heating system, the norm is 1.5 kgf/cm2, the maximum permissible pressure is 2.5-3 kgf/cm2.

Economical

An electric boiler is the source of the most expensive heat among all modern boilers for autonomous heating. Electric power boiler with a minimum error is equal to its thermal power, that is, the price of a kilowatt-hour of thermal energy is equal to the cost of a kilowatt-hour of electricity (at the beginning of 2017 - about 5 rubles).

For comparison - to the owner gas boiler Heat costs 7-8 times less (about 70 kopecks per kWh), wood heat costs four times less (1.2 rubles/kWh).

The main reason for popularity electric heating- its complete autonomy. The boiler does not require the owner’s attention from the word “at all”: it is capable of maintaining the temperature you set in the house for an unlimited time. However, the owner of an electric boiler, of course, wants to reduce his electricity bills. I will tell you how to do this in the corresponding section of the article.

Automatic shutdown

In case of any deviation from the normal mode, the protective devices in the boiler power circuit must turn it off as quickly as possible. The electric boiler automation circuit should include two protective devices A:

Image	Safety device
	RCD(device protective shutdown, or, more correctly, a differential current device). It compares the currents at the input and output of the boiler, recording leaks over 30 milliamps. The RCD is triggered, in particular, when a pet or person touches the terminals of the equipment and when the insulation breaks with current leakage to grounded building structures (for example, to the reinforcement mesh of the foundation). The RCD is triggered almost instantly: turning off the power takes a split second.
	Circuit breaker. Its task is to turn off the power when the level is exceeded rated current. This can happen if there is a short circuit in the wiring, if the shell of the heating element is destroyed by corrosion, or if there is an excessive salt content in the coolant with which the electrode boiler operates. The response speed depends on the deviation of the current from the rated value and can vary from 1-2 seconds to several minutes. The operating current of the machine should differ as little as possible from the maximum current at regular work boiler For example, a 25A circuit breaker with single-phase power supply (220 volts) ensures safe operation of a device with a power of 25x220=5500 W.

So-called differential machine performs the functions of both protective devices: it provides protection for both differential currents and overcurrents.

Wiring

Wiring heating sources can be:

• Wire with a reduced cross-section;
• Detachable connections (sockets, terminals, etc.).

It will help to completely eliminate heating of the wire simple instructions: cross section of each core copper wire must be at least 1 square millimeter at 10 amperes peak current. I emphasize: peak, that is, corresponding maximum power boiler For a supply voltage of 220 volts, 10 amperes correspond to a power of 2.2 kW (220x10/1000), for a voltage of 380 volts - 3.8 kW (380x10/1000).

Connecting the boiler via regular socket permissible only with a power of up to 3.5 kW. A heating boiler with a power of up to 8 kilowatts can be connected to one power phase with a dedicated cable to the panel; A higher power device must be powered from a 380 volt network. The higher the supply voltage at a constant power consumption, the lower the currents in the wiring and the less heating of the wires and terminal connections.

In a private house with wooden walls wiring is laid only in metal pipe(steel, copper or corrugated stainless steel). The requirement is related to fire safety: The metal shell will prevent the tree from catching fire in the event of a short circuit.

Required strapping elements

Electrode or induction boiler for safe work water circuit requires the following set of additional equipment:

Image	Strapping element
	Circulation pump, ensuring the movement of antifreeze or water along the circuit. Its performance is most easily calculated as 0.043xQ, where Q is the boiler power in kilowatts. The formula is correct for a temperature difference between the boiler outlet and inlet of 20 °C.
	Expansion membrane tank. It is divided by an elastic membrane into two compartments - air and intended for coolant. Since air compresses much better than liquid, the increase in pressure with increasing volume of coolant is insignificant. The volume of the tank is approximately 10% of the volume of the circuit, which is roughly calculated as 15 liters per 1 kW of boiler power.
	Security group. It includes a pressure gauge for visual pressure control, an automatic air vent for removing air and steam and safety valve, which discharges coolant into the drain when a specified pressure is exceeded (usually 2.5-3 atmospheres).

How to arrange the piping elements in the heating system of a private house when installing it yourself?

• Pump placed on the return line, in front of the boiler. The lowest water temperature in the entire circuit will have a beneficial effect on the life of the device: the plastic impeller and rubber sealing gaskets do not like heat;
• Security group always mounted on the supply, immediately after the boiler outlet. It is there that the pressure will begin to increase when the circulation stops (for example, if the pump breaks down);

• Expansion tank can be placed at any filling point at some distance from the pump (2 filling diameters before the impeller and 8 filling diameters after the impeller). The flow turbulence generated by the pump has a bad effect on the life of the elastic membrane of the tank.

A special case

Modern heating element boilers differ from electrode and induction boilers large size housings. In addition to the tank with heating elements, it contains full set piping: pump, expansion tank, safety and air valves. The pressure sensor readings are displayed on the instrument display panel.

That is why, when installing a heating element boiler, it can be connected directly to the heating supply. It makes sense to install only a pair of shut-off ball valves at the inlet and outlet: they will allow you to avoid resetting the entire heating system when dismantling the boiler for repair or maintenance.

Economical electric heating

How can you reduce your home heating costs?

Here is a description of three solutions with varying effectiveness.

Remote thermostat

The automation of modern boilers provides for the connection of remote thermostats. They allow the device to flexibly respond to changes in air temperature, adjusting the current heating power to it. Without a thermostat, the boiler maintains the set temperature of the coolant, which is not always justified: during a thaw, at the same temperature of the radiators, the house will become noticeably warmer.

Expenses: from 1500 rubles (with self-installation thermostat).

Saving: up to 20% electricity.

Underfloor heating

More effective solution- heating the house with an in-floor heating system. When laying in a screed or under parquet board heat exchanger pipes, the entire floor turns into a heating device.

Savings are achieved due to more rational compared to radiator heating distribution of cold and hot zones:

• With convection heating at +20 at floor level under the ceiling, the air will heat up to 26-28 ° C, which will give an average room temperature of 23-24 degrees;
• A warm floor, heated to the same +20, will warm the air under the ceiling only to +16. Average temperature - +18 °C.

Expenses: from 1000 rubles per square meter of heated area. Expensive, no doubt. As a bonus, you will receive an unforgettable feeling of comfort: walking on a heated floor is very pleasant, and a child playing on the floor will never catch a cold.

Saving: at outside temperature 0 °C decrease average temperature in a house from +24 to +18 degrees it will save 33% of electricity.

Film heaters successfully compete with a combination of an electric boiler and a water-heated floor. They fit under any heat-conducting finishing coating, without requiring major repairs of an apartment or house. Square meter A film heater with a specific power of 150-220 W/m2 costs 600-800 rubles.

Thermal accumulator

A buffer tank, or heat accumulator, is a volumetric water tank with thermal insulation and several pipes for connecting to heating circuits. Its function is clear from the name - the accumulation of thermal energy.

Reference: by heating 3 cubic meters of water from 40 to 80 °C, you can store 120 kilowatt-hours of heat. This is enough to heat a house of 70-100 square meters for 16 hours.

What does having a heat accumulator provide?: if you have a two-rate meter, you can use electricity for heating only at night, during the cheap tariff. The heat accumulated during the night by the buffer tank is gradually consumed during the day for the needs of heating the house.

Energy companies are offering electricity at cheaper night rates to compensate for the overnight drop in load on the grid. The fact is that it is impossible to store a large amount of energy, and it is not always possible to maneuver the power of generators.

How to connect a heat accumulator to a boiler and heating system: it forms two circuits with a circulation pump in each of them. The first circuit connects the boiler to the buffer tank, the second - the tank to the radiators. Provides a constant battery temperature when the water temperature in the tank drops mixing unit with three-way thermostatic mixer.

Expenses: with a tank volume of 3000 liters, taking into account the cost of an additional circulation pump and mixing unit - from 180,000 rubles.

Saving: reduction in heating costs by 2.5-3 times. Single bet and night rates for Moscow at the beginning of 2017 the ratio is 5.38/1.64 rubles.

Conclusion

I sincerely hope that my advice will help the dear reader make electric heating in his home safe and economical. As always, Additional materials you can find in the video in this article. I look forward to your additions and comments to it. Good luck, comrades!

If connection suburban area connection to a centralized gas supply is impossible for some reason and is at least not planned in the coming years, then heating from an electric boiler is often used to heat private houses - the solution has a number of advantages, although it is not without drawbacks.

To use the device effectively, it is important to correctly select the electrical equipment and circuit diagram. We suggest understanding the constructive and functional features different types electric boilers, and also evaluate the features various options connecting units to the heating system.

For those who plan to organize home heating from electrical appliance, it will be useful to learn how to use the double tariff to reduce electricity bills.

Electric boiler converts electrical energy in thermal and depending on the design features it can be:

• TENOV;
• electrode;
• induction.

Regardless of the type modern models equipped with which you can adjust the power of the device and the degree of heating of the coolant.

Usually it is also possible to obtain information from external sensor to control the temperature of the air mass in a specific room.

Device with heating element

Install inside a container intended for water. They can be made in the form of tubes or plates. To regulate the degree of heating, the heaters are turned on one by one.

Water enters the tank, is heated, and then transferred to the circuit. As it cools or heats up, individual heating elements turn on or off. The movement of the coolant is controlled by the built-in circulation pump.

Depending on the size and type of heating elements, electric boilers are wall-mounted or floor-mounted. You need to choose a place to install the device so that it is convenient to service.

To do this, you can use special formulas to perform the calculations manually. It is convenient to use calculators available on specialized websites. After entering information about the area, layout and other characteristics of the transformer substation, the program will provide the necessary information.

Usually the estimated length of the pipe is slightly increased to have a small margin. If it seems too short, you'll just have to buy a new one. Heated floors require a filtration system to ensure that the coolant is sufficiently clean.

Electric boiler and double tariff

One of the significant reasons for using an electric boiler for heating is the possibility of using double tariffs for the use of electricity. Reducing fees during the night period allows you to significantly reduce costs.

A two-tariff meter makes it possible to pay much less for electricity used at night than during the day and allows owners of electric boilers to save money

Will need to purchase and install two-tariff meter. It is worth noting that dual-circuit models equipment with heating element is supplied hot water To collapsible crane with a characteristic noticeable delay. As a result, some of the heat is lost, which reduces the effect of saving electricity.

It makes sense to supplement such a design with an external heat accumulator capable of long time keep high temperature heated water. Such a device is quite effective when using a two-tariff meter.

Water is heated at night, stored warm and used during the day, energy consumption during the day is reduced, as well as electricity bills.

Conclusions and useful video on the topic

Electric boiler installation procedure:

Although using an electric boiler as a heating device is considered too expensive, its advantages are obvious. Such devices are safe for people and environment, operate automatically, are accessible and easy to use.

If the type of heating system is chosen correctly and all its components are professionally installed, the boiler will operate for a long time without unnecessary costs.

Do you have experience using an electric boiler to heat your home? Or want to ask questions on the topic? Please comment on the post and participate in discussions. Block feedback located below.

Therefore, for such a “voracious” consumer of electricity as an electric boiler, from stable operation which in winter depends a lot, It is important to make the correct electrical wiring, select reliable automatic protective equipment and make the connection correctly.

To better understand the principle of connecting a boiler, you need to know what it usually consists of and how it works. We will talk about the most common heating element boilers, the heart of which is Tubular Electric Heaters (TEH).

passing through Electric heating element the current heats it up, this process is controlled by an electronic unit that monitors important indicators boiler operation, using various sensors. The electric boiler may also include a circulation pump, control panel, etc.

Depending on the power consumption, electric boilers designed for a supply voltage of 220 V - single-phase or 380 V - three-phase are usually used in everyday life.

The difference between them is simple, 220V boilers are rarely more powerful than 8 kW, most often in heating systems devices of no more than 2-5 kW are used, this is due to restrictions on the allocated power in single-phase power lines of houses.

Respectively 380V electric boilers are more powerful and can efficiently heat large houses.
Connection diagrams, rules for choosing cables and automatic protective equipment for 220V and 380V boilers are different, so we will consider them separately, starting with single-phase ones.

Connection diagram of an electric boiler to a 220 V power supply (single-phase)

As you can see, the 220 V boiler supply line is protected by a differential circuit breaker, which combines the functions of a circuit breaker (AB) and. Also, it is mandatory to connect grounding to the device body.

The heating elements or heating elements (if there are several of them) in such a boiler are designed for a voltage of 220V, respectively, to one of the ends of the tubular electric heater A phase is connected, and a zero is connected to the other.

To connect the boiler, you need to lay a three-wire cable (Phase, Working zero, Protective zero - grounding).

If you were unable to find a suitable differential automatic switch or it is simply too expensive in the line of protective automatics you have chosen, you can always replace it with a combination of Circuit Breaker (AB) + Residual Current Device (RCD), in which case the diagram for connecting a single-phase boiler to the electrical network looks like So:

Now all you have to do is choose a cable the right brand and cross-sections and ratings of protective automatic equipment, for correct wiring to the electric boiler.

When choosing, you need to start from the power of the future boiler, and it is best to count with a reserve, because in the future, if you decide to change the boiler, you will no longer be able to choose an older model (more powerful), without serious alterations to the wiring.

I will not burden you with unnecessary formulas and calculations, but will simply lay out a table for selecting cables and automatic protective equipment depending on the power of a 220 V single-phase electric boiler. Moreover, the table will take into account both connection options: through a differential switch and through a combination of Circuit Breaker + RCD.

Specifications will be indicated for the gasket copper cable brand VVGngLS, the minimum permissible PUE (electrical installation rules) for use in residential buildings, while the calculations were made for a route from the meter to the electric boiler 50 meters long; if your distance is greater, you may need to adjust the values.

Table for selecting protective automatic equipment and cable cross-section according to the power of a 220 V electric boiler

The residual current device (RCD) is always selected one step higher than the circuit breaker paired with it, but if you cannot find an RCD of the required rating, you can take the protection of the next level, the main thing is not to take it lower than required.
There are usually no particular difficulties or discrepancies when connecting a 220V electric boiler, so we move on to the three-phase version.

General electrical diagram connecting a 380 V electric boiler looks like this:

As you can see, the line is protected by a three-phase residual current circuit breaker; grounding is necessarily connected to the boiler body.

As usual, according to tradition, I am posting a connection diagram for a three-phase electric boiler with a combination of an automatic switch (AB) plus a residual current device (RCD) in a circuit, which is often cheaper and more accessible than Diff. machine.

It is convenient to select protective automatic ratings and cable cross-sections for three-phase electric boilers of various capacities using the following table:

In three-phase electric boilers, three heating elements are usually installed at once, sometimes more. At the same time, in almost all domestic boilers Each of the tubular electric heaters is designed for a voltage of 220 V and is connected as follows:

This is the so called star connection, for this case it is supplied to the boiler neutral wire Nick.

The heating elements themselves are connected to the network as follows: one end of each of the tubular electric heaters is connected by a jumper, the remaining three free phases are alternately connected: L1, L2 and L3.

If your boiler has heating elements designed for a voltage of 380 V, their connection diagram is completely different and it looks like this:

This connection of the heating element of an electric boiler is called a “triangle” and at the same voltage of 380 V, as in the previous “Star” method, the boiler power increases significantly. In this case, a neutral conductor is not required, only phase wires are connected, and the electrical connection diagram looks like this:

Do not deviate from the connection diagrams acceptable for your electric boiler, if there are heating elements for 220V at three-phase connection, do not change the circuit to a “triangle”. As you understand, theoretically you can reconnect them and get a voltage of 380 V on the heating element, respectively, increasing their power, but in this case they will most likely simply burn out.

How to determine the correct connection diagram for heating elements with a star or triangle and, accordingly, what voltage they are designed for?

If the instructions for connecting your electric boiler are lost or there is simply no way to access them, determine correct scheme Connections at home can be done as follows:

1. First of all, inspect the terminals of the heating element; most likely, the manufacturer has already prepared the contacts for a specific circuit. So, for example, for connecting a star and heating elements for 220V, three terminals will be connected by a jumper.

2. The very presence of the zero terminal - “N”, indicates that the heating elements are 220 V and they must be connected according to the “Star” circuit. Moreover, its absence does not mean that the heating element is 380 V.

3. The same reliable option To find out the voltage of the heating element is to look at the markings indicated either on the flange to which the tubular electric heaters are attached

Or, on the heating element itself, its parameters are necessarily extruded:

If you cannot find out for sure the voltage for which your electric boiler is designed and the connection diagram for its heating element, but you “really need to” connect it, I advise you to use the “Star” circuit. With this option, if the heating elements are designed for 220 V, they will work normally, and if they are rated at 380 V, they will simply produce less power, but most importantly they will not burn out.

In general, there are different cases, and it is very difficult to cover them all in the format of one article., That's why be sure to write your questions, additions, stories from personal experience and practice, it will be useful to many!

The remoteness of centralized gasification lines forces homeowners to look for alternative sources thermal energy for autonomous heating systems.

Along with burning solid or liquid fuel, translation gas equipment for propane-butane mixture, they are actively used. This type of electricity-to-heat converters is used both as the main heat-generating unit and in the form backup source for heating rooms.

Varieties

Constructive approaches, circuit diagrams electric heat generators determine a wide power range for this type of boiler.

In addition to dividing according to the type of power supply network into single-phase devices and three-phase units, thermal converters are classified as follows:

1. Tenovye. Heating of the circulating coolant is carried out through the interaction of the liquid with thermoelectric heating elements in the chamber of the device.
2. . Resistance of an electrolyte (saline solution) when passed through it alternating current accompanied by the release of thermal energy, which is transferred to heating radiators ( heated floors).
3. . Heat is removed from a kind of transformer with a primary and secondary (short-circuited) winding.

Power Supply Requirements

Rated power ranges from 1.5 to 36 kW.

Such a consumed load on the electrical network requires a dedicated line to connect the converter.

The power cables to it are laid directly from the metering device (electricity meter). For emergency or planned generator shutdown, use circuit breakers, which in parallel act as a fuse in the event of a short circuit.

Allowed to connect to single-phase network models with power up to 9 kW inclusive, more powerful equipment operates in three phases.

Note: the boiler must be connected to electrical network with grounding.

How to avoid freezing and boiling of coolant

The use of electric heat sources in water heating circuits is associated with the risk of boiling of the liquid.

Therefore, the units are practically not built into gravity systems heating of private houses, and are installed in combination with systems that ensure coolant circulation.

During installation, special attention is paid to the thermostatic device, which is responsible for turning the electric boiler on/off automatically. The thermostat relay can also act as system freeze protection when the generator is used as backup equipment.

Water heating safety

Continuous cycling electrical equipment, trouble-free operation requires installation in heating scheme protective devices and devices.

They are mounted separately or assembled into a security group, which is represented by the following parts:

1. Automatic valve for releasing air from the water circuit (AVK).
2. Safety valve membrane type to reset overpressure from the system if the thermostat fails or a blockage occurs in the pipeline.
3. Pressure gauge. The control and measuring device is used to visually monitor the state of the working environment in the circuit. Sometimes, instead of a pressure gauge, a combined device is used that shows, in addition to pressure, the temperature of the coolant.

Specialist's note: in the diagram closed heating Be sure to install an expansion tank with a displacement that provides compensation for the linear expansion of the entire volume of coolant in the system.

Connecting boiler equipment to the water supply

Long-term (seasonal) heating operation is inevitably accompanied by a decrease in the amount of liquid in the circuit.

Connecting the water supply to the space heating system is intended to neutralize this phenomenon.

The connecting pipeline is usually equipped with two ball valves, between which devices for water treatment are installed. This may be a filter filled with polyphosphate salt. The filler chemically prevents the formation of salt deposits on the heating elements of boilers.

Note: the efficiency of electrode boilers depends on the concentration of salts in the solution for electrolysis; in this case, water treatment is accompanied by the process of enriching the liquid with salt.

The installation of an electric boiler is not regulated by regulatory authorities. It is only necessary to agree on the allocation of capacity for equipment if its consumption goes beyond the limits specified in the contract.

Optimization of payment for electricity, the cost of which varies at different times of the day, determines the modernization of the metering unit for consumed kilowatts.

Install a meter with two or more tariff gradations.

The monthly price for heating with an electric boiler when using temporary tariffs is significantly reduced.

You can connect an electric boiler to the heating system yourself, but if you want to do everything right, doubt your abilities or don’t have enough time to independent work, trust installation organizations with extensive work experience. To ensure that the heating in your home lasts as long as possible, buy devices only from high-quality manufacturers.

Watch the video in which a specialist explains how to properly connect an electric boiler for heating:

With the onset of cold weather, you really want your home to be warm and comfortable. Installing an electric boiler will help create such conditions. Modern market provides a large number of heating devices, so there should not be any difficulties with choosing a suitable unit. A problem may arise with the connection, so it is worth understanding the features and operating principles of the device.

Before installing the boiler, you need to study its specifics

Features and types

An electric boiler is part of the heating system, its main function is to heat the home and supply water. The main task of the device is to transform electrical energy into thermal energy. It should be noted right away that the usefulness coefficient of such a device is 96-99%, but gas and solid fuel boilers have a much lower rate, which does not exceed 80%.

All boilers powered by electricity can be divided into rheostat and shadow types. There are also electrode-type units and direct action. They work as follows: an electric current passes through water, releasing heat and heating it. The advantages include compactness and absolute safety. In addition, scale practically does not appear in them. The fact is that water molecules in these devices are split into ions.

Induction models are valued for their high efficiency, despite the fact that heating elements are not used. Despite high cost, such units are very popular. This is due to their safety. The principle of operation is that the device is assembled from special material, which, under the influence of current, begins to release heat.

In this video you will learn how to install a boiler with your own hands:

As the others heating devices Electric boilers installed in a private house have their pros and cons. The advantages of installing an electric boiler for heating a private home include the following:

• no open flame;
• easily regulates temperature;
• does not leave combustion waste after work;
• compactness;
• high efficiency;
• easy to install;
• doesn't need chimney and ventilation system;
• environmentally friendly;
• safe.

All these qualities provide the heating unit with a long service life. Naturally, if you comply with all care and installation requirements. The main disadvantages are considered high price, which not everyone can afford. And the installation of such units, for example, in country houses It's just not practical.

In addition, the devices stop working if there are power outages. In addition, an electric heating device provokes the formation of scale, and this, in turn, significantly increases energy consumption.

When installing an electric boiler with your own hands, you need to take care of high-quality thermal insulation. In this case, heat will not be wasted, which means you can save on electricity bills.

Safety regulations

Before proceeding with installation, you must familiarize yourself with the safety rules. Before connecting the electric boiler to the heating system, you must turn off the power supply; only in such conditions can you proceed with installation.

Do not forget about safety rules when installing the boiler

In addition, the following must be observed:

• Boilers should not be installed near a water supply or other sources of water;
• during installation work It is strictly forbidden to use locking reinforcing bars;
• the boiler unit requires grounding;
• before installing the device you need to obtain permission from a special service;
• in case of repairs, contact only specialists;
• use electrical cable, which corresponds to the boiler power;
• the device is placed at a distance specified in the instructions;
• the mounting wall must be made of non-combustible material.

After heating radiator put in place, you need to make sure that all requirements and conditions are met. The device must operate correctly and uninterruptedly in all modes.

Power calculation

Before purchasing an electric boiler, you need to determine the power required to heat your home. In this case, you need to take into account the difference in temperature outside and in the house, the number of windows and the condition in which the windows, doors and floors are located. The power of such devices can vary from 2 to 60 kW.

To calculate required power, you can use the simple formula F = S × F 1/10, where:

• F - device power;
• S- total area rooms;
• F 1 - power density per 10 m².

In addition to the basic calculation, there are a number of conditions that affect indoor heating. When starting to install a heating boiler yourself, The following factors need to be taken into account:

• quality of thermal insulation material;
• number of rooms in the house;
• number and size of windows;
• the presence of a basement and attic in the home;
• number of floors;
• climatic features of the area;
• is there ventilation;
• Is the roof insulated?

Since such a calculation is quite difficult to make, especially for an inexperienced master, it is better to seek help from specialists. Although if the housing has an area of ​​less than 150 m², then you can use the formula by adding 1.5 kW - this figure will be the minimum power of the electric boiler.

Step by step installation

Heating boilers powered by electricity are easy to connect. But first you need to figure out the method of fastening; there are two types:

• wall;
• floor.

The connection diagram of an electric boiler to the heating system for both types has the same principle. The only difference is that one is attached to the wall and the other to the floor. First you need to prepare the tools and required material which will be needed during operation:

• hammer drill;
• building level;
• electrical cable;
• fasteners;
• profile for fastening and mounting strip;
• locksmith's keys;
• metal-plastic pipes;
• user manual and diagram.

Installing an electric boiler in a private house begins with markings. To do this, use a level to mark the location of the device. It is best to install it away from the water supply system.

Then all actions are performed strictly according to the instructions:

1. Using a hammer drill, drill required quantity holes. But you should first make sure that the wall can support the weight of the heating device.
2. Attach the fastening profile and install the bar.
3. Using a level, measure how level the fasteners are.
4. At the next stage, the boiler is secured with dowels. If the device floor type, then special metal stands are first mounted to the floor.
5. Now proceed to grounding; if you neglect this point, the operation of the device will become unsafe. First you need to make a center, that is, connect several metal pins with reinforcement, and then bury these rods into the ground.
6. After connecting the device to a separate circuit breaker, you need to connect the neutral wire to these metal rods; all excess overvoltage will go into the ground.

After all the steps taken, you need to calculate the cable cross-section: the higher the power, the larger the cross-section. Now this wire is routed to the boiler, where a circuit breaker is installed. But separate electrical cables are pulled from the sensors that regulate the temperature.

If the boiler is not equipped with a pump and expansion tank, then install it yourself. This can be done using fasteners and an electric drill. Connect both devices to the main device metal-plastic pipes and secure it nearby. It is best to remove all wiring into cable channels, and then install a protective casing.

To connect the heating boiler to the heating system, you need to turn off the water in the house. And then, using a flange and coupling, attach the device to the pipeline. It remains to check the electric boiler for functionality.