Unit installation

111
Coding in the delivered condition Possible change
■ Target temperature
control switched on
(code "10:1"):
Temperature at which
the solar heated water
in the DHW cylinder is
to be stratified.
■ Extended control func-
tions set to heat two
DHW cylinders (code
"20:8"):
When one DHW cylin-
der reaches its set
DHW temperature, the
second DHW cylinder
is heated.
12:10 Minimum collector tem-
perature 10 °C.
The solar circuit pump will
only start when the set
minimum collector tem-
perature is exceeded.
12:0 Minimum collector temper-
ature function switched
off.
12:1
to
12:90
The minimum collector
temperature can be adjus-
ted from 1 to 90 °C.
20:0 No extended control func-
tions enabled.
20:1 Additional function for
DHW heating.
20:2 Differential temperature
control 2.
20:3 Differential temperature
control 2 and auxiliary func-
tion.
20:4 Differential temperature
control 2 for central heating
backup.
20:5 Thermostat function.
20:6 Thermostat function and
auxiliary function.
20:7 Solar heating via external
heat exchanger without
additional temperature
sensor.
Code 2, Vitotronic 300-K
"Solar" group
(cont.)
5601 090 GB
Service