Control Sequence - Viessmann VITOTRONIC 200 Installation And Service Instructions Manual

Heating circuit control unit
Example using the settings in the delivered condition
C
D
B
60
50
40
30 30
20
10
A
0
6 7
Time
Fig.52
Start of operation with standard room temperature
A
Set boiler water/flow temperature in accordance
B
with the selected heating curve
Set boiler water/flow temperature in accordance
C
with coding address "FA":
50 °C + 20 % = 60 °C
Duration of operation with raised set boiler water/
D
flow temperature in accordance with coding
address "Fb":
60 min

Control sequence

Mixer circuit
The mixer motor will not be controlled within the "neu-
tral zone" ( 1 K).
±
Flow temperature drops
(Set value 1 K)
−
The mixer motor receives the signal "Mixer open". The
signal duration lengthens with an increasing control dif-
ferential. The duration of pauses reduces with an
increasing control differential.
(cont.)
8 9
Flow temperature rises
(Set value +1 K)
The mixer motor receives the signal "Mixer close". The
signal duration lengthens with an increasing control dif-
ferential. The duration of pauses reduces with an
increasing control differential.
Function description
81