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English 5.906-548.0 Rev. 00 (04/12)
1 Thermal insulation
2 Overflow, movable lid in the insulation
In case of failure of the float valve, the water exits
from the boiler via the overflow. The flap of the heat
insulation is opened by the stream of water.
Note:
The flap reduces heating loss in the boiler. Also, the
exiting of water vapors that condense inside the de-
vice and can lead to damage, is prevented.
1 Water shortage safeguard
2 Float
The lack of water fuse prevents the heating element
from being switched on when there is a water short-
age.
The control electronics captures the hot water tem-
perature via the temperature sensor and switches the
heating elements off or on as needed.
If the temperature regulation via the control electron-
ics fails, the temperature limiter switches the heating
element off if the maximum temperature is exceeded.
Reset the temperature limiter:
Switch on/off the device switch again.
1 Connection, protective conductor
5.6.3 Overflow
5.6.4 Water shortage safeguard
5.6.5 Temperature sensor
5.6.6 Temperature controller
5.6.7 Protective conductor connection