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9.7
Commissioning after triggering the safety temperature and pressure limiter
The heating elements are heating coils that are directly washed by the water flowing through
them. This type of heating and the extremely low water content of 0.5 litres ensure a high
degree of efficiency. The water flow is limited to a maximum of 10 l/min by a built-in flow
regulator when the hot water valve is fully open, so that an outlet temperature suitable for
showering is maintained.
The built-in safety temperature and pressure limiter provides a double safety shutdown in
case of overpressure and overtemperature.
The pressure limiter is triggered when the pressure rises to approx. 22 bar, the temperature
limiters are triggered at approx. 55º C in the inlet and at approx. 70º C in the hot water
outlet. If the pressure or temperature limiter responds, the unit is immediately disconnected
from the mains.
Before repressing the safety temperature and pressure limiter, the cause of the malfunction
must be determined and rectified by a specialist.
(1) Switch off the mains voltage.
(2) Remove the cover from the instantaneous water heater. Note the slot of the potentiometer.
(3) Use a screwdriver to press on the pressure point of the limiter (see picture) until it engages.
(4) If necessary, put the potentiometer back on and attach the cover.
(5) Switch on the mains voltage.
Water management system C 400 V
Original operating instructions
Operation
Safety pressure limiter
28 from 40
Version 2
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