Viessmann Vitodens 200 Service Instructions Manual page 50

Coding
Code 2
(cont.)
Parameter
Address A3:...
2
to
15
Coding in the delivered condition
Boiler circuit, mixer circuit
A4:0 With frost protection
(only for weather-com-
pensated control units)
A5:5 With heating circuit
pump logic function
(economy circuit): Heat-
ing circuit pump "OFF"
when the outside tem-
perature (AT) is 1 K
higher than set room
temperature (RT
AT > RT
for weather-compen-
sated control units)
Parameter address
A5:...
1
2
3
4
5
6
7
to
15
50
Heating circuit pump
"ON" at
1 °C
to
14 °C
Possible change
A4:1
A5:0
A5:1
to
A5:15
)
set
+ 1 K (only
set
With heating circuit pump logic function: Heating
circuit pump OFF, if
AT > RT + 5 K
set
AT > RT + 4 K
set
AT > RT + 3 K
set
AT > RT + 2 K
set
AT > RT + 1 K
set
AT > RT
set
AT > RT - 1 K
set
AT > RT - 9 K
set
"OFF" at
3 °C
16 °C
No frost protection; this
setting is only possible if
coding address "A3: -9"
has been selected.
Note
Observe the note for cod-
ing address "A3".
Without heating circuit
pump logic function
With heating circuit pump
logic function: Heating
circuit pump "OFF", if
(see the following table)