Viessmann VITODENS 200-W Service Instructions Manual page 70

Code 2
Solar/group "4"
Coding in the delivered condition
22:8 Start temperature differ-
ential for central heating
backup: 8 K.
Switching output sS is
switched on when the
temperature at sen-
sor / exceeds the tem-
perature at sensor aÖ by
the selected value.
23:4 Stop temperature differ-
ential for central heating
backup: 4 K.
Switching output sS is
switched off when the
temperature at sen-
sor / falls below the
stop point. The stop point
is the sum of the temper-
ature at sensor aÖ and
the value selected for the
stop temperature differ-
ential.
70
(cont.)
Possible change
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
20:8 Solar heating via external
heat exchanger with addi-
tional temperature sensor
20:9 Solar heating of two DHW
cylinders
22:2 Start temperature differen-
to tial for central heating
22:30 backup is adjustable from
21 to 30 K
23:2 Stop temperature differen-
to tial for central heating
23:30 backup is adjustable from 1
to 29 K