Evan electric boilers for heating: features of the use of systems and units when heating rooms, Evan electric boilers, electric boiler, EPO electric boiler, EPO Evan electric heating appliance

This topic will cover:

electrical diagrams of boilers;
possible causes of boiler breakdowns and ways to eliminate them,

options for connecting electric boilers will also be considered for:

two-wire single-phase network;
four-wire three-phase network with a neutral wire.

For the two connection methods, you need to know that when connecting any electrical equipment, and we are talking about electric boilers that are equated to this category, the connection is made with grounding.

In this topic, the casings of electric boilers are subject to grounding.

Why does this need to be taken into account? - Then, in the event of a breakdown of the conductor phase insulation on the metal parts of the body and a person accidentally touches the body of the electric boiler, the current potential in the human body decreases.

Replacing the heating element

Replacing the heating element and other elements, as well as diagnostics to determine the cause of the malfunction, is carried out in a passive way when the electrical equipment is disconnected from the external alternating voltage source.

This issue cannot be resolved on your own if you are not an electrician and such work is carried out accordingly if you have knowledge of the regulatory documents of the electrical safety approval group.

So what is the need for these details? — You may ask, if in this or that case there is a malfunction, you can call the electrician directly.

Well, let's put it this way - knowledge of electrical and electrical engineering will not be superfluous for you.

Connecting an electric boiler

Let's consider connecting the EVAN S1-30 electric boiler to a four-wire, three-phase network with a neutral wire.

The fifth PE conductor in the diagram in Fig. 1 is grounding and is connected to the body of the EVAN S1-30 electric boiler. Reading the connection diagram:

The electric boiler is equipped with so-called buses; a network cable with a plug is connected to buses N, A, B, C. From the buses, three phases A, B, C have branching. One branch of phases A, B, C is connected to the first contacts of the heating elements of two blocks.

The second branch from the same four buses is connected through a starter to the second contacts of the heating elements of two blocks.

Here it should be taken into account that for each individual block with heating elements, each individual heating element is connected to phase wires as follows:

Phase A and neutral wire N from the busbars are connected to the control panel. In its combination, the control panel is connected to a voltage of 220 V, the conductors from the control panel are connected:

with pump;
with air temperature sensor;
with thermostat sensor;
with self-resetting thermal switch.

The control panel consists of electronic elements that are not indicated in the diagram.

For electronic elements, diagnostics are outlined in this blog.

After carrying out repairs to replace one or another electrical part:

block with heating elements;
self-resetting thermal switch

and other parts included in the electrical circuit, it is necessary, before connecting the electric boiler to an external source of alternating voltage, to check the electrical circuit of the boiler for resistance. Diagnostics of the resistance in the electrical circuit of this circuit is carried out either with an ohmmeter or a multimeter with the appropriate function.

If, as a result of measuring resistance, the device indicates a zero value, in this example you should reconsider the connections you have made. A zero resistance number indicates a short circuit in the electrical circuit.

Consider the following electrical circuit for two types of boilers EPO-7.5 and EPO-9.45. The electrical circuit shown in Fig. 2 is identical and the difference here is only in the power of electric boilers. Let's follow the connection diagram:

These types of electric boilers are connected to a two-wire, single-phase network. The PE grounding wire is connected to the heating element block and to the body of the electric boiler. The phase wire from the phase bus in this circuit has a branching, one wire with phase potential goes to the control panel and is connected from the control panel to the first contacts of the heating elements,

Electric boilers on heating elements

The corporation uses unique devices for its boilers, heating elements, as a converter of electricity into heat. These structures are made of alloy steel in the form of tubes. The resistance of the heating element is calculated at 100 MΩ. This figure exceeds the safety requirements not only of Russian manufacturers.

For the company’s devices, only two types of failure are possible:

destruction of the internal heating element of the heating element as a result of burnout of the coil;
violation of the integrity of the heating element by breakdown.

The occurrence of these malfunctions is due to two reasons:

deposition of solid sediment on heating elements, formed as a result of the precipitation of hardness salts of the coolant as a result of its heating. The sediment covering the heating element prevents heat from being removed from the heating element, which causes it to burn out;
voltage surges in the network can lead to destruction of the integrity of the heating device;
evaporation of water leads to overheating and, as a result, combustion of the heating element occurs;
The Evan electric heating boiler, which uses a heating element in its design, loses in size and weight.

Rice. 3 Boiler diagram using heating elements

Technical features of boilers

The product range of boilers is represented by the following series:

The “Standard” series is represented by the “Economy” and “Standard” models. All boilers of the standard category are characterized by the ability to smoothly adjust the coolant temperature and are equipped with an input for connecting a circulation pump. The design of these boilers is extremely simple and consists of a metal cylinder, in the lower part of which there is a heating element, and in the upper part there is a temperature regulator sensor.

The line of this series is rich in models of varying power - from 2.5 kW to 30 kW. For heating large areas, the additional installation of a circulation pump and an expansion tank is required. Typically used as electric boilers for home and small offices.

Devices in this category differ in their equipment - for example, depending on the power, the models contain a certain number of heating elements and connectors for connecting room temperature sensors.

Among private property owners, devices of this series are most in demand.

Electric boilers "Evan" have different technical characteristics in this series, depending on the presence or absence of a three-stage switch, a built-in circulation pump, and an electronic control unit. Accordingly, more expensive models have all three mechanisms, while economical models only have a three-stage power switch. The boiler power range is from 3.5 kW to 30 kW. They are used as electric boilers for homes, offices, and warehouses.

Boilers of this series have very high power characteristics - thus, the model range is represented by units with heating output from 36 kW to 480 kW. The boilers have (not in all models) four-stage power regulation, protection against short circuits, inappropriate pressure, overheating and overload.

General principles for connecting electric boilers

Connecting a household heating appliance is not difficult, since the devices can be connected to the network using a regular electrical outlet, provided that their power is not higher than 3.5 kW. Almost all household electric heating appliances have a maximum power of about 24 kW.

The Evan company, a well-known manufacturer of electric heating boilers in Russia, has in its assortment electrical appliances, the power of which is determined by the value of 240 kW.

Devices whose power starts from 7 kW are connected to 380 Volt power lines. In both options, electric boilers must have an individual connection to the power source.

The Evan company specializes in the production of single-flange electrical appliances (with the exception of Professional class boilers), using a container for heating the coolant made of alloy steel, treated with a special anti-corrosion compound. The thickness of the heating container is 3 mm. Electric boilers of the Comfort class are made of special material with high thermal insulation and a wall thickness of 20 mm. The operating period of such a device is calculated to be at least 30 years.

Rice. 1 Models of electric boilers from Evan

All of the company's household appliances have different power levels and are designed for connection to power lines with voltage characteristics of 220 or 380 Volts.

Rice. 2 Electric single flange model

Evan boilers: pros and cons

Among the disadvantages of electric heating boilers for the Evan home are the dependence on electricity and its high consumption. However, the listed disadvantages are more or less characteristic of most electric heaters. Regarding Evan boilers specifically, many owners complain about the noisy operation of the devices, unreliable heating elements, frequent relay breakdowns and failure of the boiler automation.

Therefore, when choosing a boiler, it is better to consult with a company specialist, because the causes of breakdowns are often caused by operating conditions, instability of the supplied electricity, incorrectly executed connection diagram of the electric heating boiler and other reasons not related to manufacturing defects.

Speaking about the advantages of these Russian boilers, they usually highlight their low cost, ease of installation, a huge selection of models and ease of operation. In addition, the devices have all the advantages of electric boilers as such.

In this series, they note the absence of the need to prepare fuel and install a chimney (as is required in the case of gas and solid fuel boilers), high efficiency (99%) and a level of safety (subject to high-quality electrics).

Electric boilers EVAN. Model range and features.

Evan electric boilers are a Russian brand, with a factory in Nizhny Novgorod.
Evan is part of the Swiss NIBE group of companies with more than 90 offices worldwide. All parts that make up electric boilers undergo strict testing according to European standards and are produced only by reliable and trusted companies. When purchasing equipment from Evan, you can always be sure that the equipment will meet all the stated characteristics and will reliably serve you throughout its entire service life. The Evan electric boiler lines are divided into 3 classes:

Evan STANDARD;
Evan COMFORT;
Evan LUX;

Features of connecting electric boilers

Even for a non-specialist, the connection diagram for an electric heating boiler is clear, so installing the device will not be difficult. To understand how to install, you should know what devices you will be working with and what their purpose is.

So, during installation you will have to mount the boiler itself, various regulators, and an expansion tank on the wall (or on the floor). Depending on the purpose, one or more main circuits are connected to the boiler. Also, depending on the model, installation of a circulation pump and boiler unit may be required.

Before proceeding with installation, you should familiarize yourself with a document such as the connection diagram for an electric heating boiler, which the manufacturer encloses with the package of documents for the unit. In accordance with this document, the device is connected to other devices in the heating network.

It should be borne in mind that if the boiler power does not exceed 3.5 kW, it can be plugged into an outlet. Otherwise, electrical installation is carried out directly from the junction box.

Moreover, if the power of the device exceeds 7 kW, the use of a three-phase network of 380 V will be required. The boiler must be protected by an RCD and a circuit breaker.

We should not forget about grounding the wiring.

Electric boilers "Evan" and their features

Electric heaters are designed for heating and heating:

residential premises;
various household;
warehouses, utility buildings;
dacha;
various types of industrial premises.

They are widely used in urban apartment buildings for heating apartments. When the central heating is turned off, they can be used as an additional source of heat.

Most Evan-type heaters use tubular electric heaters to heat the coolant. Therefore, they are characterized by the corresponding features and advantages that heating element electric boilers have. Tubular electric heaters for Evan are made of stainless steel, so they are reliable in operation.

These heating elements have their own distinctive feature: the coolant is heated using flow mode.

The advantages of this type of equipment include:

great design;
small sizes;
compactness;
does not require special premises;
convenient and simple installation of heating devices.

The boiler control system includes starting fittings, which allow for simple, reliable starting of the electric boiler. The thermoregulatory system, using appropriate sensors, ensures that the indoor temperature regime chosen by the owner of the house is maintained.

The control system allows the consumer to change the power consumption when the electric boiler is operating. This allows for rational use of electrical energy depending on operating conditions. These boilers are simple, easy to use, reliable, and at the same time have a low price.

Prices for electric boilers "EVAN"

Evan

Watch a video about the benefits of using electric boilers.

Equipment and characteristics of EVAN EXPERT:

Model range with power range from 7.5 to 27 kW
Nine-stage automatic power control depending on the current level of heat loss
Intelligent control system ensuring maximum energy efficiency and full automation of the device operation
Unique weather-dependent dual heating control algorithm based on analysis of both outside and room temperatures

Possibility of manual power limitation
Possibility to use both water and non-freezing liquids certified for heating systems as a coolant
Possibility of direct connection of the “warm floor” system to the boiler
Stainless steel heating elements blocks Backer (Czech Republic)
Rotation of heating elements to increase the life of heating elements
Outdoor temperature sensor included
Room temperature sensor included
Expanded equipment of the mini-boiler room:
— built-in circulation pump Wilo RS 15/5
— expansion tank 12 l
— automatic air vent
Full security package:
- overheat protection
– emergency self-resetting sensor (operation temperature - 92 ±3 °C);
— protection against short circuit currents and overloads
- circuit breaker;
— protection against overpressure
- safety valve
— protection against failure (break or short circuit) of temperature and pressure sensors
— control of the presence of phases, automatic switching when a phase enters the remaining one, followed by restoration of uniform resource consumption
— emergency heating shutdown independent of the controller
— antifreeze of the coolant in the heating system
Maximum comfort and control options:
— built-in programmer for daily and weekly room air temperature (9 preset operating modes)
— graphic display with intuitive navigation through settings and operating modes
— ability to connect the EVAN GSM/Wi-Fi Climate remote control module
— control of boilers located in a cascade
- DHW control
– switching the valve directing the coolant flow to the indirect water heater (purchased separately)
- three-way valve control
Help for service departments:
— self-diagnosis of faults, archiving of time and error codes
— power consumption statistics
— the presence of a unique debugging mode, within which you can check the operation of each of the boiler controls
Pipe thread: inlet/outlet – external G 3/4
Efficiency – 99.5%
Installation method: wall
Warranty - 24 months.

At the end of our article, I would like to note that when choosing any model of EVAN electric boiler, except for the EXPERT model, you must consult with our specialists and select a safety group, the cost of which does not break the buyer’s pocket, but ensures the safety and integrity of the entire heating circuit.