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The summer season is associated with the departure to the cottage, the repair of urban waterways, the lack of hot water. A flowing electric water heater, a compact device, will solve the problem. Advantage of the device in instantaneous heating of running water in a faucet or shower. It does not require an accumulating capacity that takes up space. Due to the heating elements built into the jacket, the running water, after washing them, heats up.
Principle of operation of instantaneous water heaters
In principle, the distribution of hot water is not needed. Heated water can be fed along the cold water line, but then it can not be diluted.
There are two fundamentally different heating schemes - flowing pressure and non-pressure. In this case, the scheme is considered to be non-pressure, since the water inlet to the heating after the gate valve and its free discharge to the shower passes under atmospheric pressure. In this scheme, a temperature controller is used, the user determines the flow rate on arrival. The circuit includes a shutdown valve in the absence of water in the pipe. This protects against overheating of water and an accident. The flowing electric water heater can operate at a power of 2-8 kW and does not require separate wiring.
The pressure flow system is more complicated. In order to obtain the required flow and temperature parameters, two regulating systems are involved - pressure and temperature. Pressure systems are complex, use additional options, and their cost is much greater. 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, designed for the power of the device.
To ensure that water does not create deposits on the tents when heated, it is magnetically treated with a compact activator built into the system. An electric water heater is an alternative to a boiler. The equipment has some tasks, but a different principle of operation. In the boiler water is heated constantly, with a capacity of 1-2 kW, for flow heating it is necessary to give a volley with a power of 3-30 kW, depending on the equipment selected. On the other hand, excess water in the container cools, energy is wasted unproductively.
The flowing electric water heater takes power only when using a tap or shower.
Installation of flow-through heaters
Numerous models of flow heaters use similar methods of heating. Brands are distinguished by design and applied materials in the layout of products. The installation of an electric water heater for the shower is performed from models of pressure and pressureless series. Low power of non-pressure devices does not allow receiving water, warmer than 60 ° C. But such a temperature is the standard for supplying a coolant in the central heating line. A pressureless heater can only serve one point of parsing. However, the device is compact, easy to install on its own and can provide the need for a special nozzle. Due to different sections of the inlet and discharge of water, the time of the liquid in the heating chamber is regulated. Expiration from the narrow end creates a comfortable pressure.
Here is a drawing of a pressureless flow-through heater AEG BS 35 E from Germany. The company specializes in the production of flow-through heaters of different categories. A gravity-free device can operate at low power and operate at a maximum of two points in turn. The AEG RCM 6 E pressure water heater can be installed on the line up to 10 bar. Flask and heating element in copper version. Such heaters are installed in a separate cabinet, and they can not be called economical.
Installation of a flow-through electric water heater to the tap
At first glance, the device installed on the faucet seems like an ordinary mixer. Only electrical wiring gives the placement of the device. In the sturdy housing of the tube, a spiral heater and a control regulator are hidden. In the design solutions can be used different power supply. All devices include:
- a flask;
- heater;
- temperature relay with the shut-off function;
- a water flow relay that gives a command to start;
- filter on water;
- load regulator.
Typically, electric water heaters are used for cottages. Wash dishes and hands with warm water can be from a low-power device. The lower the power of the device and the simpler the design, the cheaper it is. For seasonal use, you can find a model worth less than three thousand rubles. In this case, you have to manually adjust the flow of water. The higher the inlet flow, the lower the outlet temperature. It is considered optimal if the device produces a flow-temperature ratio:
- washing in the kitchen - 3-5 l / min at t 45-500 C;
- washbasin - 2-4 l / min at t 35-37 С;
- Shower - 4-10 minutes at t 37-40 С.
Such indicators will give the device a power of 3-6 kW. The model of the crane KDR-4E-3 of Delimano brand provides heating under these conditions to 60 degrees. Inexpensive flow-through water heaters of the company Electrolux (Electrolux) took the first place in the rating for the price and functionality. It is worth paying attention to Electrolux Smartfix 3.5 T and Garanterm GHM 350, the brand of Russian production.
Choice of a flow-through 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. Boilers operate on a regular network and consume energy sparingly.
If there was a need to install an electric flow-through water heater in a block of flats old device, the device should be selected in the power range up to 8 kW, with a separate gasket line.
If a 380 V power supply is connected to the building, you can acquire a powerful device. It is important to choose a safe heater using:
- enamelled heating chamber;
- elements in a stainless casing;
- a flask and heating elements of copper, with a quartz coating.
How to choose the right electric water heater by power? Experts advise:
- In summer, enough power, kW, as the water has a temperature of about 18 degrees;
- In winter models with a power exceeding 5 kW are effective;
- models with options that require a power of more than 7 kW, in a standard apartment is not worth buying.
Model range of electric instantaneous water heaters of their prices and characteristics
Demand for flow-through heaters is conditioned 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 conditions. Water heats up within a few seconds and there is an opportunity to keep a stable indicator.
When choosing a device, it is guided by its power, design and proposed options. However, the main indicator is the power of the water heater.
For the opportunity to choose, we present an overview of several brands.
Atmor running water heateris manufactured in Israel's own production.
Quality of products is confirmed:
- working resource - 15 years;
- special design of the heater, up to 12 kW with instantaneous action;
- work in the network using an electronic flow sensor;
- the possibility of installation in a tight space.
If the head in the system is less than permissible, the electricity is turned off, the indicator goes out. Atmor heaters can be used in multi-apartment buildings of old construction. As an example, you can suggest to consider the model of an electric instantaneous water heater Atmor ENJOY 100 5000 Shower, costing about 3 thousand. Its capacity is 3 l / min, with heating up to 65 C, power connection of 5 kW. As a pressure option for these parameters, the Atmor In-Line 5 model is proposed, two thousand rubles more expensive.
Flowing water heater ThermexA closed design with two buttons on the panel. The products of Stream series with capacity of 7 kW and Sistem are offered, the device closed in the case with a connection for 6-10 kW. The unit has a chemical protection against salt formation, adjustment of the heating temperature.
Advantages of running water heater:
- The design is equipped with a water flow sensor, a copper heater, a temperature control sensor and an RCD;
- serves several points at the same time;
- easy installation;
- fast heating of water.
Stylish model Thermex System 600 White pressure head with a capacity of 5 liters per minute does not cost more than 5 thousand rubles.
Flowing water heater PolarisManufacture of the Great Britain has 250 centers on service of the technics in Russia. The products are presented in several series, which in turn are multivariate.
Common to all models are:
- work in the range, 5 bar;
- automatic shutdown of heating when reaching 57 C;
- presence of the display on the panel of the device;
- a water filter and a pressure regulator;
- Own accessories in the complete set - a spill, a shower.
Vega and Gamma are considered inexpensive models. Their cost does not exceed 3 thousand. But the most affordable at the price is the Polaris Smart model.
When choosing the model of an electric flow-through water heater, we recommend paying attention to products under the brand name Electrolux and AEG. First of all, it is necessary to focus on the state of the electrical network, from which the water heater is supplied.
