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Viessmann Vitodens 222-W - 2023 Manual

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Operating programs for central heating and DHW heating
Note
The operating programs for central heating and DHW
heating can be set separately.
Symbol Operating program Function
Central heating
"Heating" The rooms of the selected heating circuit are heat-
ed in accordance with the specified room tempera-
ture or flow temperature and the time program (see
chapter "Central heating").
Note
In room temperature-dependent mode, a time pro-
gram for central heating can only be set at the
room temperature controller: See operating instruc-
tions for room temperature controller.
"Standby mode" ■No central heating
■Frost protection for the heat generator is active.
DHW heating
"DHW" "ON" DHW is heated in accordance with the DHW tem-
perature and time program specified (see chapter
"DHW heating").
"DHW" "OFF" ■No DHW heating
■Frost protection for the DHW cylinder is active.
Special operating programs and functions
■"Screed drying"
This function is activated by your contractor. Your
screed is dried in line with a set time program (tem-
perature/time profile) suitable for the relevant build-
ing materials. Your settings for central heating have
no effect on the duration of screed drying (max. 32
days). The system no longer provides DHW heating.
The "Screed drying" function can be altered or
switched off by your contractor.
■"External hook-up"
The operating program set at the control unit was
changed over by an external device, e.g. an EM-EA1
extension (DIO electronics module). The operating
program cannot be changed via the control unit for
as long as the external hook-up is enabled.
■Only for weather-compensated mode and continuous
operation:
"Holiday program": See page 32.
■Only for weather-compensated mode and continuous
operation:
"Holidays at home": See page 31.
Note
The special operating programs and functions are dis-
played alternately with the room temperature or the
flow temperature of the heat generator.
In the main menu, you can call up the set operating
program under "Information": See page 43.
Procedure for setting a time program
The following explains how to input the settings for a
time program. The specifics of the individual time pro-
grams can be found in the relevant chapters.
Operation
Operating program
5593212
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