24
H3-72-01
For internal use only
Since soft water or a domestic descaling device may result in the limestone sensor not actuating, after
a certain number of hours of operation and for reasons of hygiene the clear text display will require the
user to descale the system.
In order to be able to recognise the water level in the evaporator by means of the level sensor, the
average result of 80 readings during a period of 2 sec. (software) is deducted.
5.3
Descale
Program duration: approx. 35 minutes
The “descale” program can be selected with the OK button (menu of the OK button back – user settings
– descale).
Descaling comprises the following steps:
•
The water tank, which is filled with 0.5 litres of a mixture of equal proportions of descaling agent
and water, is recognised.
•
For reasons of safety the evaporator is firstly emptied. To do so, the discharge pump is operated
for 12 seconds (software).
•
The supply pump transports the mixture into the evaporator until the level sensor recognises
water, with a certain follow-on time (slightly longer than in the standard function). The mixture is
circulated several times and is pumped in and out again.
•
After the evaporator has been filled, the mixture in the evaporator is heated up to a certain
temperature, thus speeding up the descaling process. The mixture is maintained at this
temperature for some time.
•
After which the evaporator is emptied until the level recognition is actuated, with a certain follow-on
period.
The first rinse is carried out in the following steps:
•
The water tank must be removed, emptied and filled with fresh water up to the MAX mark and then
reinstalled. On doing so, unauthorised utilisation is secured against by means of a minimum period
of 5 seconds (software) between detection, removal and installation of the water tank.
•
The rinsing liquid is transported into the evaporator up to the level recognition with a certain,
longer, follow-on time. The rinsing liquid is circulated several times.
•
Subsequent to circulation the rinsing liquid is heated up to a certain temperature [60°C]
(EEPROM) for a certain period [0 sec.] (virtually no heating up!)
•
Subsequent to heating up, the rinsing liquid is pumped off until the level recognition is actuated, in
addition to a certain follow-on time. Should the rinsing liquid exceed the permissible temperature,
the “Empty” program is started.
The second rinse is carried out in the following steps:
•
The water tank must be removed, emptied and filled with fresh water up to the MAX mark and then
reinstalled. On doing so, unauthorised utilisation is secured against by means of a minimum period
of 5 seconds (software) between detection, removal and installation of the water tank.
•
The rinsing liquid is transported into the evaporator up to the level recognition with a certain follow-
on time. The rinsing liquid is circulated several times.
