Viessmann Vitodens 333 Service Instructions Manual page 51

Code 2
(cont.)
Coding in the delivered condition
A3:2 Outside temperature
below 1 °C: Heating cir-
cuit pump "ON"
Outside temperature
above 3 °C: Heating cir-
cuit pump "OFF"
!
Please note
When selecting a
value below 1 °C
there is a risk of
pipes outside the
thermal envelope
of the house
being damaged
by frost.
The standby
mode, in particu-
lar, should be
taken into con-
sideration, e.g.
during holidays.
Parameters
Address A3:...
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
1
2
to
15
Possible change
A3:–9
to
A3:15
Heating circuit pump
"ON"
-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
14 °C
Coding
Heating circuit pump
"ON/OFF" (see the fol-
lowing table)
"OFF"
-8 °C
-7 °C
-6 °C
-5 °C
-4 °C
-3 °C
-2 °C
-1 °C
0 °C
1 °C
2 °C
3 °C
16 °C
51