Viessmann VITODENS 200-W Service Instructions Manual page 53

Code 2
(cont.)
Coding in the delivered condition
9F:8 Differential temperature
8 K; only in conjunction
with the mixer circuit (only
for weather-compensa-
ted control units)
Boiler circuit, mixer circuit
A0:0 Without remote control
(only for weather-com-
pensated control units)
A2:2 Cylinder priority applica-
ble to heating circuit
pump and mixer
A3:2 Outside temperature
below 1 °C: Heating cir-
cuit pump "On"
Outside temperature
above 3 °C: Heating cir-
cuit pump "Off"
!
Please note
If a value is selected below 1 °C, there is a risk of pipes outside the thermal
envelope of the building freezing up.
The standby mode, in particular, should be taken into consideration, e.g. dur-
ing holidays.
Parameters
Address A3:...
-9
-8
-7
Possible change
9F:0
to
9F:40
A0:1
A0:2
A2:0
A2:1
A2:3
to
A2:15
A3:-9
to
A3:15
Heating circuit pump
"ON" at
-10 °C
-9 °C
-8 °C
Differential temperature
adjustable from 0 to 40 K
With Vitotrol 200 (auto-
matic recognition)
With Vitotrol 300 (auto-
matic recognition)
Without cylinder priority
applicable to heating circuit
pump and mixer
Cylinder priority applies
only to the mixers. The
mixer is closed whilst the
cylinder is being heated;
the heating circuit pump
runs.
Reduced priority applied to
mixer (the heating circuit
receives a reduced amount
of energy)
Heating circuit pump "ON/
OFF" (see the following
table)
"OFF" at
-8 °C
-7 °C
-6 °C
Codes
53