Viessmann VITODENS 200-W Installation And Service Instructions Manual page 150

Function description
Control functions
External blocking and fault message input
Input DE1
Input DE2
Input DE3
The effect on the internal circulation
pump is selected in coding address
"3E" in group "General".
External demand
The "External demand" function is con-
nected via extension EA1. There are 3
inputs available at extension EA1 (DE1
to DE3).
External demand
Input DE1
Input DE2
Input DE3
The effect on the internal circulation
pump is selected in coding address
"3F" in group "General".
The effect on the relevant heating circuit
pump is selected in coding address
"d7" in group "Heating circuit".
Venting program
During the venting program, the circula-
tion pump will be alternately switched on
and off for 30 s at a time over a period of
20 min.
For a certain period, the diverter valve is
alternately set towards heating and
DHW heating. The burner is switched off
during the venting program.
150
(cont.)
The effect on the relevant heating circuit
pump is selected in coding address
"d6" in group "Heating circuit".
The function is selected via the following
coding addresses in the "General"
group:
The minimum set boiler water tempera-
ture in case of external demand is selec-
ted in coding address "9b" in group
"General".
Activate venting program: See "Venting
the heating system".
Code
3A:4
3b:4
3C:4
Code
3A:2
3b:2
3C:2