Viessmann VITOTRONIC 100 Operating Instructions Manual page 14

Control unit operation
Operating program information
Symbol Operating program
DHW heating (available in conjunction with DHW cylinder only)
"Only DHW"
Frost protection
"Standby mode"
Special operating programs
The following special operating programs are available
according to system equipment:
■ "External hook-up"
The operating program set at the control unit was
e.g. changed over via an externally connected but-
ton.
Example: In a school, heating demand exists outside
of school times, e.g. for a parents' evening.
This function cannot be influenced via the control
unit. Once the external changeover no longer
applies, the set operating program becomes active
again.
■ "External program"
The operating program set at the control unit has
been changed over by another control device. E.g.,
by your mobile phone with your Viessmann app. You
can change the operating program on the Vitotronic
control unit.
Note
The special operating programs are shown on the dis-
play in alternation with the boiler water temperature.
In the main menu, you can call up the set operating
program under "Information" (see page 20).
14
(cont.)
Function
DHW is heated in accordance with the settings
■
for the DHW temperature (see chapter "DHW
heating").
No central heating
■
Frost protection for the boiler and the DHW cylin-
■
der is assured.
No central heating
■
No DHW heating
■
Frost protection for the boiler and the DHW cylin-
■
der is assured.