
13
5583 141 v1.0
Vitotrol 200A, Installation, Operating and Service Additional Information
Setback mode (reduced heating mode)
See “Reduced heating mode”.
Heating program
The heating program determines whether you heat your
rooms and DHW, or only heat DHW, or whether you shut
down your heating system with frost protection monitoring.
You can select the following heating programs:
Hw
The rooms are heated and DHW is provided (winter mode).
Hw
DHW is provided but there is no central heating
(summer mode).
H9
Frost protection is enabled; no central heating,
no DHW heating.
Operating status
In the heating program
w
the operating status
“standard heating mode” switches to the operating status
“reduced heating mode” and vice versa. The times for the
operating status changeover are defined when the time
program is set at the Vitotronic control unit.
Heating circuit
A heating circuit is a sealed circuit between the boiler
and radiators, in which the heating water circulates.
A heating system may comprise several heating circuits.
For example, one heating circuit for the rooms occupied
by you and one heating circuit for the rooms of a separate
apartment.
Heating circuit pump
Circulation pump for the circulation of the heating water
in the heating circuit.
Actual temperature
Current temperature at the time of the scan;
e.g. actual room temperature.
Mixer
A mixer mixes the water heated in the boiler with the
cooled water returning from the heating circuit.
The water, heated to the right temperature in line with
demand, is delivered to the heating circuit by the heating
circuit pump. The Vitotronic control unit adjusts the
heating circuit flow temperature via the mixer to the
various conditions, e.g. different outside temperature.
Night setback
See “Reduced heating mode”.
Standard heating mode
When you are in the house during the day, you can heat
the rooms in standard heating mode. Set the periods with
the time program for central heating at the Vitotronic
control unit. During these times, the rooms are heated
to the standard room temperature.
Standard room temperature
Set the standard room temperature when you are at
home during the day (see page 11).
Reduced heating mode
When you are out or during the night, you can heat the
rooms in reduced heating mode (setback mode). Set the
periods with the time program for central heating at the
Vitotronic control unit. During these times, the rooms are
heated to a reduced room temperature.
Reduced room temperature
When you are out or during the night, select the reduced
room temperature on the Vitotronic control unit.
See also “Reduced heating mode”.
Solar circuit pump
In conjunction with solar thermal systems. The solar
circuit pump delivers the cooled heat transfer medium
from the DHW cylinder indirect coil to the collectors.
Set temperature
Default temperature that should be reached;
e.g. set room temperature (see page 11).
Summer mode
Heating program “Only DHW”. At warmer times of the
year, i.e. when the rooms do not have to be heated,
you can disable heating mode. The boiler remains enabled
for DHW heating.
Cylinder primary pump
Circulation pump for heating the DHW in the DHW
cylinder.
Terminology