Operating instructions

115
Flow temperature rises
(Set value +1 K)
The mixer motor receives the signal
"Mixer closed". The signal duration
lengthens with an increasing control dif-
ferential. The duration of pauses
reduces with an increasing control differ-
ential.
Cylinder temperature control of the Vitotronic 300-K
Brief description
■ The cylinder temperature control is a
constant temperature control function.
This is achieved by starting and stop-
ping the circulation pump for cylinder
heating.
The switching differential is ±2.5 K.
■ When the DHW cylinder is heated, a
set flow temperature is specified that
is 20 K higher than the set DHW tem-
perature (adjustable at coding address
"60" in the "DHW" group).
Functions
Time program
An automatic or an individual time pro-
gram may be selected for DHW heating
and the DHW circulation pump.
Compared with the heating circuit heat-
up phase, DHW heating starts 30 min
earlier in automatic mode.
The individual time program enables up
to 4 time phases per day to be set for
DHW heating and the DHW circulation
pump for every day of the week.
All cylinder heating sequences will be
completed independently of the time pro-
gram.
Function description, Vitotronic 100 and Vitotronic 300-K
Heating circuit control of the Vitotronic 300-K
(cont.)
5815 091 GB
Service