Not all apartments and houses have uninterrupted hot water supply. Their residents sometimes face the inability to take a shower or bath. This problem will help them cope with a flowing water heater. It can be installed in the bathroom itself.
Choosing a place
First of all, sufficient power is needed to operate the instantaneous water heater. They have a capacity of from 1 to 27 kW, and usually require the installation of a new network and connection to the electrical panel. In apartments, single-phase non-pressure flow-through devices are most often used; their power is up to 4-6 kW.
If you constantly have no warm water in your apartment, then you should choose a more powerful model, preferably a pressure type, or consider buying a storage tank.
It should be said that low-power instantaneous water heaters usually have one phase, and devices with a capacity of 11 kW or more - three-phase. If your housing has only one phase, then you can only install a single-phase device.
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The choice of the place where the instantaneous water heater will be installed depends on its type: non-pressure or pressure. Most often, to ensure that you wash yourself in the shower during the period of water outages, non-pressure models are installed in the bathrooms.Of course, they are not able to give such a pressure of hot water, which gives a centralized supply of hot water or pressurized water heater. But the flow of heated water, which will provide you with a pressureless look, is enough to wash.
Important! It should use exactly the shower nozzle, which comes bundled with a non-pressure water heater - it has fewer holes. From the usual shower nozzle water can barely go.The free-flow model is installed near the place of consumption of water heated by it. Usually this place is above or below the sink, on the side. The following aspects are taken into account:
- it should not be sprayed from the shower. Devices marked with IP 24 and IP 25 are protected from water ingress, but it is also undesirable to put them in places of pouring;
- access to control, adjustment;
- ease of use of the shower (tap), which is connected;
- convenience of connection to the central water supply;
- strength of the wall to which the device will be attached. Typically, the weight of such water heaters is small, but the wall should ensure its secure attachment. Brick, concrete, wooden walls are usually not in doubt, but drywall may not be suitable;
- evenness of the wall. On too curved surfaces, it is sometimes difficult to install the device correctly.
Learn how to get rid of old paint, pokleit wallpaper, insulate the windows in the apartment.Pressure water heater is able to serve several points of water consumption at once. Its installation is carried out near the riser or the point of dismantling. Such a device has more power than non-pressure. It may have both the top and bottom connection, but to install and connect such a model, it is better to contact the experts.
Flowing water heaters are gas and electric. Electrical devices are mainly used, since for a gas one it is necessary that the project has a gas column and a gas pipeline, and the installation must be coordinated with the city service.
Did you know? One of the first ways of heating water was burning hot stones on the fire, which were immersed in a container with water.
Mounting
Having chosen where the right place is, you should do the following:
- to determine the place of attachment, using the level, and make a mark. Be sure to check them with the mounting plate from the kit (if any);
- with the help of a drill, holes are drilled in the wall at the places indicated earlier;
- dowels are inserted into the holes;
- screws are screwed into the dowels;
- our water heater is attached to the screws.
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Installation of water heater
To connect a single-phase instantaneous water heater to electricity, you will need to measure the desired cable length from the electrical panel to the place of operation of the device. Usually for such purposes a three-core copper cable with a section of 3x2.5 mm is taken, but the power of the water heater itself should also be taken into account. Approximate values of the section depending on the power provided in the table. 
For safe operation of the device (after all, it will be used in a room with high humidity), you will also need automatic protection for this connection (RCD). For the same reason, there must be grounding.
The outlet should be chosen not cheap, waterproof, which can withstand a current of 25A. If there is no plug, then you should install it yourself. The plug must be selected with a ground contact.
- First connect the cable to the switched off device through a special hole and hang the device on the wall.
- Strip the ends of the wires and connect them to the terminal box according to the instructions. It is very important to connect all three conductors (phase, working zero and ground) to the socket intended for them. Tighten them with fastening screws.
- Connect the other end of the cable to the terminals of the electrical panel through the RCD as well as in the device - phase to phase, zero to zero, grounding to ground.
Important! The operation of such a heater gives a large load on the network, and it is undesirable to turn it on simultaneously with other devices that have high power consumption.All work on the connection to the mains are performed in the absence of voltage in the network.
If you have installed a washing machine with a socket in the bathroom, which has a separate connection to the panel through the RCD, then you just need to connect a cable with a plug to this outlet to the device.
Video: how to install instantaneous water heater
Connection technology
Before work associated with the tie-in water pipes, water should be blocked.
Connect the free-flow model in two ways:
- through the shower hose. The hose is removed from the hose and attached to the inlet of the device. This method is good for occasional shutdowns of hot water;
- through tee. Tee crashes into a water pipe or is attached to the outlet for a washing machine. A valve or a ball valve is attached to the tee (in the presence of a washing machine, two taps or valves). From it to the inlet of the heater stretches a plastic pipe or a special hose. At the exit set the hose with a shower nozzle. If you want to use the water heater constantly, then such a tee with a valve is cut into the outlet for a hot water pipe.
Did you know? In ancient Roman terms there was a centralized system of heating with the help of a stove, water and air, which then circulated in the voids of the walls and the floor. This system came to the Romans from the Greeks, but was perfected by Roman engineers.
System check
Before the first start of the system should be checked:
- fastener strength;
- correct cable connection If there are testers, check that the power is properly connected;
- tightness of connections. Pay special attention to the tightness of the cover above the terminal box of the water heater;
- water pressure.
Trial run
- Before starting the pressure model, shut off the hot water supply pipe to the apartment. Open the hot and cold water valves on the water heater.
- Open the valve at the free-flow model with a shower head. Before any start it is necessary to fill the water heater with water.
- When you turn on, first turn on the faucet, and then the water heater. And when you turn off the device is turned off first, and then shut off the water.
- Select the required power for heating water.
- Turn on the water and then the water heater and wait a few minutes until the water heats up. Ensure that the instrument is working properly and that there are no leaks in the connections.
- Turn off the device and close the water.
Important! Such devices are equipped with filters whose purity should be monitored. In the absence of such a filter, you can install it yourself. If the water in your plumbing is hard, then Teng will need to periodically get rid of scale.Connect the instantaneous water heater can be yourself. But it requires proper connection to the electrical panel and to the water pipes. If you do not have the necessary skills or the connection process itself is doubtful, it is better to turn to professionals.
Instantaneous water heater: reviews
5kW, it's almost 23 Ampere. These are two powerful teapots and two weaker, simultaneously. Here and figure out the cable section.
Ground connection is mandatory !!!!! If the house is old, the task becomes difficult.
An 80-liter boiler is able to provide a set of two baths of hot and warm water, i.e. comfortable for ablution.
For a family of two people and 50 liters is enough. Out from the flow heater to the boiler. No regrets.
