Infinitely electronically controlled instantaneous water heater with
21 kilowatts peak power.
TW = leaving the taps
TWW = inlet control valve with
L1/L2/L3/PE = Electric Connection
1) heater
2) Pressure Switch
3) the central retaining screw
L2 of the upper clamp connection (second from left) is already
scorched and melted on the corresponding vein isolation. The device is
not reliable.
For electronic instantaneous water heaters can select the water
temperature at the device. To the mixture of cold water is not
necessary. But even if a mixing valve is used, even a thermostatically
controlled, subject to true electronically controlled water heater is
no longer the limitations of the hydraulic water heater, the heater is
specifically required for proper thermostatic mixing valves.
Benefits are increased comfort and a slightly better efficiency, which
enables energy savings of up to 20% compared to hydraulic
instantaneous water heaters, as well as small amounts of water are
heated only as far as necessary. The warming is largely variable.
The water is usually heated by a heater element in which the filaments
are washed directly from the water. Tap water is usually a good
insulator, so that up to a certain, obvious to the device conductance
no significant fault currents. The bare wire heating elements are
compared with the previously used indirectly heated tube radiators in
addition to the higher efficiency also has the advantage of a much
shorter reaction and thus heating. A disadvantage is the higher
susceptibility to air bubbles and steam bubbles, which can lead to
partial overheating of the heating wires.
Fully electronic water heater, the outlet temperature even above the
performance limit held constant by reducing engine via an
electronically controlled valve, the flow rate to the extent that the
set desired temperature is reached. The world's first fully electronic
water heater in 1987 developed and patented by Stiebel Eltron.
There are also known as "electronic" heater advertised performance
without expensive electronics that have only an electronically
controlled engine valve. By controlling the flow rate can be kept
constant with the temperature limitations, therefore have similar
restrictions on such devices as the hydraulically controlled
instantaneous water heater.
