Cylinder Temperature Control - Viessmann Vitotronic 200 KW2 Installation And Service Instructions Manual

Cylinder temperature control

Brief description
The cylinder thermostat operates
with a constant temperature. It is the
result of starting and stopping the
cylinder primary pump.
The switching differential is ±2.5K.
Whilst the cylinder is being heated, a
constant upper boiler water
temperature is set, and the central
heating is switched OFF (optional
cylinder priority).
Functions
Time program
An automatic program or an
individual time program may be
selected for heating DHW and the
control of the DHW circulation pump.
Compared with the heating circuit
heat−up phase, DHW heating starts
30 minutes earlier in automatic
mode.
The individual time program enables
up to four switching periods per day
to be set via the time switch to
control the DHW heating and the
DHW circulation pump.
Any cylinder heating sequence will
be completed, independent of the
time program.
Function description
Coding addresses which influence
the cylinder thermostat
54, 55, 56, 58 to 62, 64, 66, 67,
70 to 75, 7F , A2.
For a description, see the coding
overview.
In conjunction with coding address 7F
7F:1 Detached house:
H Automatic mode
For systems with two heating
circuits, the heating times for
heating circuit 1 are applied.
H Individual time program
The switching times for DHW
heating and the DHW circulation
pump have the same effect on all
heating circuits.
7F:0 Apartment block:
H Automatic mode
For systems with two heating
circuits, the heating times for
the individual heating circuit
are applied.
H Individual time program
The switching times for DHW
heating can be adjusted separately
for each heating circuit.
53