Instantaneous water heater electric and its application

The summer season is associated with going to the country, repairing city waterways, lack of hot water supply. Instantaneous electric water heater, compact device, will solve the problem. The advantage of the device is the instant heating of running water in a tap or for a shower. No storage capacity required to take up space. Due to the heating elements built into the jacket, the passing water, washing them, heats up.

On this topic:instantaneous electric water heaters for shower!

The principle of operation of instantaneous water heaters

In principle, hot water distribution is not needed. The heated water can be supplied through the cold water line, but then it cannot be diluted.

There are two fundamentally different heating schemes - flow-through pressure and gravity. In this case, the circuit is considered non-pressure, since the water inlet for heating after the valve, and its free flow to the shower passes under atmospheric pressure. In this scheme, a temperature controller is used, the flow rate at the intake is determined by the user manually. The circuit includes a power off valve when there is no water in the pipe. This protects against water overheating and accidents. Instantaneous electric water heater can operate at a power of 2-8 kW and does not require separate wiring.

A pressure flow system is more complicated. In order to obtain the required flow and temperature parameters, two control systems are involved - for pressure and temperature. Pressure systems are complex, use additional options, and their cost is much higher. But they are designed to connect several sampling points, and turn on automatically when a duct appears in the pipe. The system requires a separate wire for the power of the device.

To prevent the water from creating deposits on the shadows when heated, it is subjected to magnetic treatment with a compact activator built into the system. An electric instantaneous water heater is an alternative to a boiler. The equipment has the same tasks, but a different principle of operation. In the boiler, the water is constantly heated, with a power of 1-2 kW, for flow heating, it is necessary to submit a salvo with a power of 3-30 kW, depending on the selected equipment. On the other hand, excess water in the tank cools down, energy is consumed unproductively.

The instantaneous electric water heater takes power only when you use a tap or shower.

Flow heaters device

Numerous models of flow heaters use similar heating methods. Brands are distinguished by design and materials used in product layout. Installation of electrical water heater flowing shower is made from models of pressure head and non-pressure series. The low power of non-pressure devices does not allow obtaining water warmer than 60⁰ C. But this temperature is standard for the supply of coolant in the district heating main. A gravity heater is able to serve only one point of analysis. However, the device is compact, easy to install on your own and can meet the need, provided that a special nozzle is used. Due to the different cross-sections of the inlet and outlet of water, the time that the liquid is in the heating chamber is regulated. The outlet from the narrow end creates a comfortable pressure.

Here is a drawing of a gravity flow heater AEG BS 35 E made in Germany. The company specializes in the production of flow heaters of various categories. The free-flow device can operate at low power and operate at a maximum of two points in turn. Pressurized water heater AEG RCM 6 E can be installed on mains up to 10 bar. Flask and heating element in copper design. Such heaters are installed in a separate cabinet and cannot be called economical.

Installation of an instantaneous electric water heater on a tap

At first glance, a device mounted on a tap appears to be an ordinary mixer. Only the electrical wiring reveals the placement of the device. The robust tube housing hides a spiral heater and a process controller. In design solutions, various power supply connections can be used. All devices include:

• flask;
• heater;
• temperature relay with shutdown function;
• water movement relay giving a start command;
• water filter;
• load regulator.

Usually instantaneous electric water heaters are used for summer cottages. You can wash the dishes and hands with warm water from a low-power device. The lower the power of the device and the simpler the execution, the cheaper it is. For seasonal use, you can find a model costing less than three thousand rubles. In this case, you will have to manually adjust the water flow. The higher the inlet flow, the lower the outlet temperature. It is considered optimal if the device produces a flow-temperature ratio:

• sink in the kitchen - 3-5 l / min at t 45-50⁰ FROM;
• washbasin - 2-4 l / min at t 35-37⁰ FROM;
• shower - 4-10 minutes at t 37-40⁰ FROM.

Such indicators will be given by a device with a power of 3-6 kW. The KDR-4E-3 crane model of the Delimano brand provides heating under these conditions up to 60 degrees. Inexpensive instantaneous water heaters of the Electrolux company took first place in the rating in terms of price and functionality. It is worth paying attention to Electrolux Smartfix 3.5 T and Garanterm GHM 350, Russian-made brands.

Choosing an instantaneous electric water heater for a country house

There are certain norms of water consumption for each person. Therefore, it is necessary to calculate the purchase of a water heater based on the total demand for hot water. For a large building with several sanitary points, it is better to use a storage heating system. The boilers operate on a regular network and are energy efficient.

If there is a need to install an electric instantaneous water heater in an old apartment building, the device should be selected in a power range up to 8 kW, with a separate line.

If a voltage of 380 V is supplied to the building, then you can acquire a powerful device. It is important to select a safe heater that uses:

• enamelled heating chamber;
• elements in a stainless casing;
• flask and heating elements made of copper, with a quartz coating.

How to choose the right instantaneous electric water heater in terms of power? Experts advise:

• in the summer, a power of 3.5 kW is enough, since the water has a temperature of about 18 degrees;
• in winter, models with a power above 5 kW are effective;
• models with options that require a power of more than 7 kW are not worth purchasing for a standard apartment.

A range of electric instantaneous water heaters, their prices and characteristics

The demand for flow heaters is driven by the need to create comfortable living conditions under any circumstances. The compact size of the devices allows you to install the equipment in confined spaces. The water heats up within a few seconds and it is possible to keep a stable indicator.

When choosing a device, they are guided by its power, design and offered options. However, the main indicator is the power of the water heater.

For a choice, we present an overview of several brands.

Atmor instantaneous water heater manufactured in-house in Israel.

The quality of the products is confirmed by:

• working resource - 15 years;
• a special design of heating elements, with a power of up to 12 kW with instantaneous action;
• network operation using an electronic flow sensor;
• possibility of installation in tight spaces.

If the pressure in the system is less than the permissible, the electricity is cut off, the indicator goes out. Atmor heaters can be used in older apartment buildings. As an example, we can offer for consideration a model of an electric instantaneous water heater Atmor ENJOY 100 5000 Shower, costing about 3 thousand. Its productivity is 3 l / min, when heated to 65⁰ C, connection power 5 kW. As a pressure head option for these parameters, the Atmor In-Line 5 model is offered, two thousand rubles more.

Instantaneous water heater Thermex represents a closed structure with two buttons displayed on the panel. We offer products of the Stream series with a capacity of 3.5 - 7 kW and Sistem, a device closed in a housing with a 6-10 kW connection. The unit has chemical protection against salt formation, heating temperature control.

Advantages of running water heater:

• the structure is equipped with a water flow sensor, a copper heater, a temperature control sensor and an RCD;
• serves several points simultaneously;
• easy installation;
• fast water heating.

The stylish Thermex System 600 White pressure head model with a capacity of 5 l / min costs no more than 5 thousand rubles.

Instantaneous water heater Polaris made in Great Britain has 250 service centers for its equipment in Russia. The products are presented in several series, which, in turn, are multivariate.

Common to all models is considered:

• work in the range of 0.25 - 6.0 bar;
• automatic shutdown of heating when reaching 57⁰ FROM;
• the presence of a display on the instrument panel;
• complete with water filter and pressure regulator;
• own accessories included - spout, shower.

Vega and Gamma are considered inexpensive models. Their cost does not exceed 3 thousand. But the most affordable model is considered the Polaris Smart.

When choosing a model of an electric instantaneous water heater, we advise you to pay attention to products under the Electrolux and AEG brands. First of all, it is necessary to focus on the state of the electrical network, from which the water heating is powered.

Review testing instantaneous water heater - video