Viessmann Vitotronic 200 Installation And Service Instructions Manual page 78

Function description
Cylinder temperature control
System with Vitosolic
A third set DHW temperature can be
defaulted via coding address "67".
Control sequence
Code "55:0", cylinder heating
The DHW cylinder goes cold (set
value 2.5 K, change via coding
address "59"):
The set boiler water temperature is
adjusted 20 K higher than the set
DHW temperature (adjustable via
coding address "60").
Pump ON:
Starting the cylinder primary pump
subject to the boiler water tem-
perature (code "61:0"):
The circulation pump starts when
the boiler water temperature is 7 K
higher than the DHW temperature.
Immediate start of the cylinder pri-
mary pump (code "61:1")
Code "55:1"Adaptive cylinder heating
With adaptive cylinder heating, the
speed of the temperature rise during
DHW heating is taken into account.
78
(cont.)
Reheating by the boiler will be sup-
pressed above this value. The DHW
cylinder is heated exclusively by the
solar heating system.
The DHW cylinder is hot, (set value
+2.5 K):
The set boiler water temperature is
returned to the weather-compen-
sated set value.
Pump run-on:
The cylinder primary pump runs on
after cylinder heating until the fol-
lowing criteria are met:
The differential between the boiler
water and the DHW temperature is
less than 7 K.
The weather-compensated set
flow temperature has been
reached.
The set DHW temperature is
exceeded by 5 K.
The set max. run-on time has
been reached (coding address
"62").
Without pump run-on (code "62:0")