Viessmann VITODENS 300 Service Instructions Manual page 55

Code 2
(cont.)
Coding in Function mode
the as
delivered
condition
Address:
value
A3:2 * 1 Outside temperature
below 1 °C: Heating cir-
cuit pump ON
Outside temperature
above 3 °C: Heating cir-
cuit pump OFF
Note
When selecting a value
below 1 °C there will be
a risk of pipes outside
the thermal insulation
envelope of the house
freezing-up. The
standby mode, in parti-
cular, should be
observed, e.g. during
holidays.
Parameters
Address A3:...
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
1
2
to
*1
Only for weather-compensated control units.
Coding
change
Address:
value
A3:-9
to
A3:15
Heating circuit pump
ON at
-10 °C
-9 °C
-8 °C
-7 °C
-6 °C
-5 °C
-4 °C
-3 °C
-2 °C
-1 °C
0 °C
1 °C
to
Coding
Possible change
Heating circuit pump ON/
OFF (see the following
table)
OFF at
-8 °C
-7 °C
-6 °C
-5 °C
-4 °C
-3 °C
-2 °C
-1 °C
0 °C
1 °C
2 °C
3 °C
55