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Viessmann Vitodens 222-F - 2023 Manual

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AB
Flow temperature
in °C
110
Outside temperature
in °C
3.5
1.4
0.2
-20
C
Set room temperature in °C
35 30 25 20 15 10 5
Fig. 18
AIf you change the slope:
The steepness of the heating curves changes.
BIf you change the level:
The heating curves are shifted in parallel in a verti-
cal direction.
CIf you change the standard room temperature (set
room temperature):
The heating curves are shifted along the "Set room
temperature" axis.
Note
Setting the slope or level too high or too low will not
cause any damage to your heating system.
Both settings affect the level of the flow temperature,
which may then be too low or unnecessarily high.
Heating circuit
A heating circuit is a sealed unvented circuit connect-
ing the heat generator and the radiators, in which the
heating water circulates.
A system may comprise several heating circuits.
For example, one heating circuit for the rooms occu-
pied by you and one heating circuit for the rooms of a
separate apartment.
The heating circuits are designated at the factory as
"Heating circuit 1", "Heating circuit 2", etc.
If you or your qualified contractor have renamed the
heating circuits, e.g. as "Apartment", that name will be
displayed instead of "Heating circuit...".
Heating circuit pump
Circulation pump for circulating the heating water in
the heating circuit
Mixer
Hot heating water from the heat generator is mixed
with cooled heating water from the heating circuit. The
heating water, thus brought to the required tempera-
ture, is pumped to the heating circuit by the heating cir-
cuit pump. To ensure the required set room tempera-
ture is achieved, the control unit adjusts the flow tem-
perature via the mixer to suit different conditions.
Appendix
Terminology (cont.)
5593212
… 62 …


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