Heating - Viessmann Vitoligno 300-C Installation And Service Instructions For Contractors

Code 2
(cont.)
Coding in the delivered condition
Changeover unit
64:8 The changeover unit has eight
probes. Code only available if a
changeover unit is connected.
Changeover unit, runtime
65:30 Runtime of changeover unit,
30 min. Code only available if a
changeover unit is connected.

Heating

Coding
Coding in the delivered condition
DHW priority
A2:0 No priority control during cylinder
heating
Note
Individually adjustable for each
heating circuit. Select heating cir-
cuit with Á
Frost protection temperature
A3:2 Outside temperature below 1 °C:
Frost protection function "On"
Outside temperature above 3 °C:
Frost protection function "Off"
!
Please note
If the frost protection temperature is set to less
than 1 °C outside temperature, uninsulated
pipes may freeze.
There is a particular risk for outdoor pipes and in
standby mode, e.g. during holidays. Provide
pipes with thermal insulation and avoid unsuper-
vised standby mode.
Parameter address Frost protection function / heating cir-
"A3" cuit pump "On"
9 10 °C
− −
8 9 °C
− −
7 8 °C
− −
Possible change
64:1 Setting range: One to eight wands
to
64:8
65:10 Setting range in min
to Internally, a minimum runtime of the
65:120 suction wand is used to detect an
empty suction wand.
For boiler rated output
8-12kW: 10 min
18-48kW: 20 min
Possible change
A2:1 During cylinder heating, the mixer
closes. When the heating circuit is
wired to the boiler control unit: The
heating circuit pump remains on.
When using an extension kit for the
heating circuit: The heating circuit
pump stops.
A2:2 During cylinder heating, the mixer is
closed and the heating circuit pump
is switched off.
A2:3 During cylinder heating, the set flow
temperature is adjusted to the set
value for reduced heating mode and
the heating circuit pump is switched
off.
A3:-9 Frost protection function "On"/"Off";
to see the following table
A3:15
Frost protection function / heating circuit
pump "Off"
8 °C
−
7 °C
−
6 °C
−
Codes
63