Animo ComBi CB10, Сервисная книжка

Страница: 19 / 56

19 2017/05 Rev. 0.0
EN
ComBi-Line
7.1 How does the boil-dry protection work
The flow heater is protected against overheating and
dry-boiling. The dry-boil protection bulb [2.1] is pushed
in the pocked tube [1.2], which is located in the lower
part of the flow heater (see previous page).
Always connect the machine to a cold water
supply only!
The dry boil protection activates (switches off):
- when the sensor (bulb) registers a very low
temperature (-10 °C). Reset the system.
- when the capillary tube is damaged (leaking).
Normal operation
Visual signs on the swivel arm outlet:
• smooth and continuous water flow
• low steam generation
During normal operation, the lower part of the flow
heater (and the pocket with the dry-boil bulb inside) is
surrounded with aproximately 60 °C lukewarm water.
The set temperature for dry-boiling is 90 °C and it
cannot be activated during a normal operation.
The effects of high limescale
Visual signs on the swivel arm outlet:
• restless and irregular water flow
• high steam generation
• dry boil protection is activated
Once an obstruction builds up in the form of limescale
in the top of the flow heater, not only the top of the flow
heater reaches the 100 °C, but also the lower part of
the flow heater heats up. When the bulb from the dry
boil protection measures 90 °C (abnormally high for the
lower part), it switches off each heater neutrally. It can
only be reset by hand. The reset button is located and
marked on the left outer side of the column.
Scale
Hot water
Cold water
Coffee



High
lime
scale
Low
water
Normal
operation