Scheme connecting the electric boiler to the heating system. Electric boilers for private houses

To achieve comfort in the house in winter is impossible without using a heating system. As one of the main components in this case are electric boilers that require proper installation in compliance with technical standards. The heating system will work efficiently if the electric boiler is connected rationally.

Features of the circuit when connecting to a heating system

If you compare this equipment with gas devices, then they are easier to install, they have excellent performance characteristics, which made such units the most common among consumers. But electric boilers have certain features that should be taken into account in order to achieve trouble-free operation of the device.

As another distinctive feature from gas boilers is the possibility of tie-in anywhere in the system. Thus, the electric boiler can be connected to a circuit with forced or natural circulation of water. The device can be located at the lowest point of the system, which will guarantee maximum heating of the radiators. The discharge pipe should be located at the shortest distance from the battery level. The boiler circuit will provide for earthing on the heater. Its connection can be made to the switchboard. The zero phase of the electrical wiring should not be involved, because such actions are dangerous, the RCD identifies it and recognizes it as a short circuit in the equipment circuit.

The above-mentioned connection diagram of the electric boiler must be observed in parallel with the correct piping. In addition to the equipment itself, you will need:

• Thermal carrier;
• Pipes;
• Other components.

For reference

Tying is the connection of the device to the system, where different components are used. If the strapping is done correctly, the master will be able to achieve a slight difference between the outgoing and incoming temperature of the thermal carrier. The boiler must be connected so that the water reaches the desired value in the small circuit. Once it gets into a large circuit, the heat energy will be transferred to the radiators.

Connection diagram

The scheme for connecting the electric boiler requires the observance of a certain algorithm. To carry out the work, it is necessary to prepare:

• Temperature sensors;
• Shutoff and drain valves;
• Pump for circulation of the coolant in the battery;
• tank;
• Expansion filter;
• Electric boiler.

Start the work with the marking, then you can proceed with the installation. The unit should be placed as far as possible from the water pipe, this is required to prevent the possibility of a short circuit during leakage. The equipment can be mounted with bolts or dowels, while the surface is leveled not only horizontally, but also vertically. If it is a floor unit, you will need a pallet.

Recommendations of the master

The connection diagram of the electric boiler assumes that it is necessary to shut off the water intake, this should be done before starting work. The connection can be made by means of couplings and adapters. As part of the electrics, there must be an automatic switch and an RCD of the desired denominations. When connecting, it is necessary to provide grounding, but cable channels are required for laying the wiring. The devices are responsive even to minor voltage surges, which indicates the need for using a stabilizer.

What else is important to know about the connection diagram

The connection scheme of the electric boiler will differ depending on the circulation, which is forced or natural. Thus, the scheme is accidental, collector or primary-secondary rings. It can also be direct or mixing. In the first case, the temperature can be changed with the help of a burner, whereas a mixing one assumes the use of the element with the same name, supplemented with a servo-drive.

The scheme of connecting the electric boiler to the heating system assumes the need to install the boiler collector taking into account the return and supply lines. The system is connected to the boiler by means of a pipe of the required diameter, the output is fitted with a three-way mixing valve, with which it will be possible to control the temperature regime. The circulation pump is installed on the return line, and in the next step it is possible to install a unit controlling the pressure and temperature.

Most often for the implementation of heating systems are used two-circuit boilers, which assume the passage of water along a small contour. Once the coolant, which can be antifreeze or water, is heated, it goes along a large circle. Connecting the electric boiler to the warm floor is one of the types of strapping. There are two more types, the first one involves the installation of a hot coolant circuit (antifreeze or oil will pass through an electric boiler), and if it is water, then it will enter the tap. The third scheme of tying is the usual connection to the electrical network.

When tying the dual-circuit equipment, its type is determined by a model that can have a mixer. Its installation is quite complicated, therefore it is impossible to carry out such works with their own hands, along with the correct connection to the power grid, it will be necessary to monitor the connection to hot water supply.

Wiring diagram of the boiler by cable

The variant with the installation of boiler equipment is relevant, if the conditions under which aluminum-steel wires are connected to the house are observed. Otherwise, the connection cable of the electric boiler is used. If it is a question of three-phase equipment, then additional wiring is required, using an aluminum wire with a cross section of 1.8 mm2. Used and specialized cables with a copper core. The cable should be perpendicular to the structure and lay a separate phase, which will be required for powerful equipment.

Cost of installation works

The cost of connecting an electric boiler may vary depending on its cost. Some firms indicate a certain percentage of the price, usually it is a limit of 15 to 20%. However, if the equipment is too cheap, then a minimum threshold is set, it varies from 7,500 to 10,000 rubles.

Electric boilers for private use: reviews and prices

The most popular electric boilers on the domestic market today are RusNit models, which are manufactured in Russia. If you are interested in foreign analogs, then you should pay attention to the company Bosch, as well as Elbeva. If you are considering electric heating boilers for a private house, the price, the reviews on them you should be interested. Among others, the market is represented by the Protherm Scat 6KR model, which will cost 45,200 rubles. It is designed for heating small rooms, and also allows the connection of several boilers installed in a cascade. This, according to customers, is an excellent opportunity to increase the output capacity. An additional advantage is the possibility of connecting an external boiler, which will be used in the home for the preparation of hot water. The power can be adjusted if desired, and the equipment itself will be reliably protected by time delay from sudden power surges in the network. The boiler has two heating elements, each with a power of 3 kW. According to customers, this equipment has a high coefficient of efficiency, and the device does not require a chimney.

Another model - "Evan S1-5", which costs 11,800 rubles., It is a device equipped with electric heaters. The case is made of stainless steel, which is very popular with consumers, because this extends the life of the equipment. On the body there are: the on / off key, the temperature regulator and the heating indicator. All these functions allow you to operate the equipment with a high degree of comfort. When the temperature is adjusted, the power remains unchanged, which is 5 kW. These electric boilers for private homes, the price, reviews about which can help you make the right choice, are compact in size, you can install them on the wall.

Conclusion

Before starting the work of the master, the electric circuit of the electric boiler connection must be considered. Otherwise, you can not avoid mistakes that could cause the equipment to fail.