Domestic instantaneous water heaters are compact and have a power of up to 15 kW. Before installation, permitting documents are obtained; exceeding the load limit on the electrical network leads to the protection being triggered, and the apartment building will be de-energized.
The high power consumption of instantaneous water heaters is associated with the need to heat a large amount of water. 2 kW is enough for washing hands or dishes. 3.5 kW will delight you with lukewarm water for the shower. The electrical wiring of a standard "Khrushchev" is limited to 5 kW.
Let's consider some aspects of self-repair of instantaneous water heaters.
Non-insulated coils in instantaneous water heaters
Uninsulated coils in storage water heaters pose a serious threat to human life. It is strictly prohibited to troubleshoot a heating element by simply winding nichrome wire over the rod.
The design of an instantaneous water heater is fundamentally different from a storage one: there is no tank as such, the heating element is placed in a container slightly larger than the heating element itself, made of copper. The device is equipped with two degrees of protection: a thermostat that maintains the water temperature; flow sensor that turns off the heating element when the water supply stops.
Electricity and water are no joke when it comes to human lives. It is forbidden, as is sometimes written, to place uninsulated nichrome spirals in copper tanks, which are often connected by copper tubes. This is called negligent homicide.
Finally, an argument for the readers! It is specially coated with nichrome ceramics to reduce the formation of scale. Metal is an unsurpassed basis for salt deposition. It is not by chance that it is supplied with an inert shell.
Instructions for instantaneous water heaters
Below are instructions for the heaters discussed in the article. You should read them carefully before using them.
Especially the sections where it is written how to turn water and power on and off.
• THERMEX_Stream_manual / THERMEX Stream instantaneous electric water heater. Manual. Purpose, technical characteristics, delivery set, description and principle of operation, operation, electrical diagram., pdf, 6.58 MB, downloaded: 3743 times./
• THERMEX_Combi_manual / Instantaneous electric water heater THERMEX Combi. Manual. Purpose, technical characteristics, delivery set, description and principle of operation, operation, electrical diagram., pdf, 6.89 MB, downloaded: 2606 times./
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