Viessmann VITODENS 200-W Service Instructions Manual page 54

Codes
Code 2
(cont.)
Parameters
Address A3:...
-6
-5
-4
-3
-2
-1
0
1
2
to
15
Coding in the delivered condition
Boiler circuit, mixer circuit
A4:0 With frost protection (only
for weather-compensa-
ted control units)
A5:5 With heating circuit pump
logic function (economy
circuit): Heating circuit
pump "OFF" if the outside
temperature (AT) is 1 K
higher than the set room
temperature (RT
AT > RT
weather-compensated
control units)
Parameter address
A5:...
1
2
3
54
Heating circuit pump
"ON" at
-7 °C
-6 °C
-5 °C
-4 °C
-3 °C
-2 °C
-1 °C
0 °C
1 °C
to
14 °C
)
set
+ 1 K (only for
set
With heating circuit pump logic function: Heating cir-
cuit pump OFF, if
AT > RT
+ 5 K
set
AT > RT
+ 4 K
set
AT > RT
+ 3 K
set
"OFF" at
-5 °C
-4 °C
-3 °C
-2 °C
-1 °C
0 °C
1 °C
2 °C
3 °C
to
16 °C
Possible change
A4:1 No frost protection, adjust-
ment only possible if cod-
ing address "A3: -9" has
been selected.
Note
Observe the note for code
"A3"
A5:0 Without heating circuit
pump logic function
A5:1 With heating circuit pump
to logic function: Heating cir-
A5:15 cuit pump "OFF", if (see the
following table)