H3-72-01
13
For internal use only
1.
Filling in water
The filling procedure is carried out in the following steps:
On commencement of the operational mode, the presence of the water tank is monitored by means of
a Reed switch. If the Reed switch is not activated, operation is discontinued, an acoustic signal sounds
and “insert water tank and press OK” is indicated in the clear text display.
Closing the door is also monitored by means of a Reed switch. If the Reed switch is not activated,
operation is discontinued, an acoustic signal sounds and “close the door and press OK” is indicated in
the clear text display.
The level of water in the evaporator is monitored by means of a level sensor (metal pin / “point gauge”),
which measures the electrical susceptance of the water in the evaporator. The supply pump pumps
water into the evaporator until the level sensor recognises water and then also for a certain follow-on
time above the level of the level sensor. If the water content of the evaporator falls below a certain level,
a topping up procedure is initiated by the level sensor. The water is filled up as described above.
On commencement of the filling up procedure, the ventilation fan is switched on at a certain setting. After
the filling procedure the vent flap and the air inlet flap are closed and the hot air fan is activated.
2.
Altitude adjustment
Automatic altitude adjustment enables the hot air temperature to be regulated with a certain difference
in temperature below the maximum possible steaming temperature. This ensures that the condition of
the air in the oven is always sufficiently moist and that there are no drying effects on the food. Altitude
adjustment is carried out in the following steps:
•
The water in the evaporator is heated up with the evaporator heater operating at full power.
•
If, during a certain period of time, the temperature sensor, on measuring the water temperature in the
steam generator, does not register any change in temperature, this temperature will be taken as the
maximum possible water temperature and therefore also as the maximum possible steam
temperature.
3.
Heating with hot air and steam / continued steam heating
Subsequent to altitude adjustment, the hot air heater will be switched on. When the hot air heater is
switched on, the power of the evaporator heater is reduced in order not to exceed the fuse-protected
power supply of the single-phase appliance connection.
The hot air heater is regulated with a certain difference in temperature below the recommended or self-
installed oven temperature by means of an oven temperature sensor. If the required temperature set is
higher than the maximum temperature resulting from altitude adjustment, this temperature will be
accepted. However, the hot air must not to reach the oven temperature level.
Water will evaporate until the oven temperature sensor has reached the recommended oven
temperature or the oven temperature set. If the required temperature set is higher than the maximum
temperature resulting from altitude adjustment, this temperature will be accepted.
Exception:
from a certain temperature setting on, steam production is only regulated by the steam outlet
temperature of the climatic sensor and is thus detached from the oven temperature control. This ensures
an optimal and sufficient supply of steam for cooking.
(A setting of 100°C would enable the proportion of hot air to become too high, since the steam at the
altitude of Zug only reaches a temperature of approx. 98°C)
After completion of altitude adjustment, the floor heater is clocked at reduced power. On initial actuation
of the climatic sensor, the floor heater is switched on at full power after a certain delay.