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Operating manual for the auroMATIC 620 Controller 0020094404_0054
Summer/Winter changeover
In the basic display it is possible to determine whether
the changeover between summer and winter time is to
take place automatically.
The default setting (as-supplied condition) is for auto-
matic changeover not to take place.
If the controller is fitted with a VRC DCF external sen-
sor, the summer/winter changeover takes place auto-
matically. Switching off the automatic changeover is
not possible in this case.
On the last weekend in March, the clock is put forward
by one hour: from 2:00 to 3:00 hrs.
On the last weekend in October, the clock is put back by
one hour: from 3:00 to 2:00 hrs.
Switch-on room temperature:
Room temperature control incorporates the room tem-
perature into the calculation of the flow temperature.
Prerequisites:
There is a temperature sensor, which measures the
room temperature, fitted in the remote control or in
the wall-mounted controller.
The thermostatic control function must be activated
for each heating circuit by the heating engineer
(Menu C2).
Target room temperature
The target room temperature is the temperature that
you would like in your apartment and which you specify
to your controller. If the controller is installed in the
living room, then the target room temperature for the
room in which the controller is installed applies. If the
controller is installed in the boiler, the target room tem-
perature is applied as a reference value for controlling
the flow temperature in accordance with the heating
curve.
Timer programme
The timer programme enables the heating and/or hot
water times of heaters to be specified individually.
Timer programme is the generic term for heating pro-
gramme, holiday programme, cylinder charging pro-
gramme.
Time window
Three time windows per day can be programmed for the
heating, the hot water generation and the
circulation pump.
Example:
Time window 1: Mon 09:00 – 12:00
Time window 2: Mon 15:00 – 18:30
In the heating, each time window is allocated a target
value, which the heating system maintains during this
time.
For hot water generation, the target hot water tempera-
ture prevails for all time windows.
In the case of the circulation pump the time windows
determine the operating times.
Type of protection
The level of protection indicates the suitability of elec-
trical equipment for various ambient conditions and
additionally the protection of people from potential
hazards during their use.
example:
The controller has the level of protection IP 20. The two
numbers are of significance here.
The first digit indicates the protection of the equipment
from contact, e.g. with objects or body parts, which
could penetrate into dangerous areas of the equipment
(2 = objects > 12.5 mm Ø).
The second digit indicates the protection of the equip-
ment from the ingress of water (0 = no protection).
Weather-controlled
The outside temperature is measured by a separate
sensor which is mounted in the open air, and the results
are transmitted to the controller. At low outside tempe-
ratures the controller provides increased heating out-
put; at higher outside temperatures the heating output
is reduced.
You can find further information, among other things, in
the Vaillant heating engineering encyclopaedia on the
Internet at:
http://www.vaillant.de/Privatkunden/Marktinformati-
onen/Heiztechniklexikon.
Glossary
56


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