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Viessmann Vitodens 222-W - 2023 Manual

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Central heating in weather-compensated mode
■Between 06:00 h and 22:00 h, rooms are heated to
20 °C "Room set temperature" (standard room
temperature).
■Between 22:00 h and 06:00 h, rooms are heated to
3 °C "Set reduced room temperature" (reduced
room temperature, frost protection).
Central heating in continuous operation
■Between 06:00 h and 22:00 h, the set flow tempera-
ture is 60 °C ("Set normal flow temperature")
■Between 22:00 h and 06:00 h the set flow tempera-
ture is 20 °C ("Reduced set flow temperature",
frost protection)
Central heating in room temperature-dependent
mode
■The rooms are heated in accordance with the set-
tings on your room temperature controller.
DHW heating
■Between 05:30 and 22:00 h, the DHW is heated to
50 °C "Set DHW temperature". Any installed DHW
circulation pump is switched on.
■Between 22:00 and 05:30, the DHW cylinder is not
reheated. Any installed DHW circulation pump is
switched off.
Note
Any DHW heating started before 22:00 remains on
until the set DHW temperature has been reached.
Frost protection
■Your heat generator and DHW cylinder (if installed)
are protected against frost.
Wintertime/summertime changeover
■This changeover is automatic.
Date and time
■The date and time were set by your heating contrac-
tor.
You can change the settings at any time to suit your
individual requirements.
Power failure
All settings are retained if there is a power failure.
Energy saving tips
Saving energy when using central heating
■Do not overheat your home. Every degree of room
temperature reduction saves up to 6 % on your heat-
ing bills.
Weather-compensated mode and room temperature-
dependent mode:
Do not set your standard room temperature ("Room
set temperature") to above 20 °C: See page 28.
■Heat your home to the reduced temperature at night
or during regular absences:
–Weather-compensated mode:
Reduced room temperature
–Continuous operation and room temperature-
dependent mode:
Reduced flow temperature
For this, adjust the settings in the time program for
central heating ("Time program, heating"): See
page 29.
In room temperature-dependent mode, time pro-
grams for central heating can only be set at the room
temperature controller.
Operating instructions for room temperature
controller
■To switch off functions that are not required (e.g.
central heating in summer), set the operating pro-
gram to "Standby mode" for the relevant heating
circuits: See page 28.
■Only for weather-compensated mode:
If you are going away, set the "Holiday program":
See page 32.
During the period that you are away, the room tem-
perature will be reduced and DHW heating switched
off.
Saving energy on DHW heating
■At night or during regular absences, heat the DHW to
a lower temperature. To do so, adjust the time pro-
gram for DHW heating: See page 34.
■Switch on DHW circulation only for those times in
which you regularly use hot water. For this, adjust
the time program for the DHW circulation pump: See
page 35.
For additional energy saving functions, please contact
your contractor.
Introductory information
Your system is preset (cont.)
5593212
… 13 …


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