Heating Circuit 1, Heating Circuit 2, Heating Circuit 3/Group "5 - Viessmann VITODENS 200-W Service Instructions Manual

Solar/Group "4"
(cont.)
Coding in the delivered condition
Extended control functions
20:0 No extended control func-
tions enabled

Heating circuit 1, heating circuit 2, heating circuit 3/Group "5"

Select "Heating circuit ..." for weather-compensated control units (see page 41).
Select "5" for constant temperature control units (see page 41).
Possible change
20:1 Auxiliary 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
20:8 Solar heating via external
heat exchanger with addi-
tional temperature sensor
20:9 Solar heating of two DHW
cylinders
Code 1
47