Viessmann VITOLIGNO 300-P Service Instructions Manual page 74

Codes
Code 2
(cont.)
Coding in the delivered condition
9E:0 Without outside tempera-
ture sensor
9F:8 Differential between set
flow temperature and set
boiler water temperature
8 K
A0:0 Without remote control
A2:2 With cylinder priority
applied 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 below 1 °C is selected, there is a risk that pipes outside the thermal
envelope of the building could freeze up.
The standby mode in particular should be taken into consideration, e.g. during
holidays.
74
Possible change
9E:1 With outside temperature
sensor; automatic recogni-
tion
9F:0 Differential temperature
to adjustable from 0 to 40
9F:40
A0:1 With Vitotrol 200A;
automatic recognition
A0:2 With Vitotrol 300A;
automatic recognition
A2:0 Without cylinder priority
applied to heating circuit
pump and mixer
A2:1 With cylinder priority
applied to mixer (select for
systems with heating water
buffer cylinder)
During cylinder heating,
the mixer is closed and the
heating circuit pump oper-
ates
A2:3 Modulating priority applied
to to mixer (select for systems
A2:15 without heating water buf-
fer cylinder), i.e. the heat-
ing circuit receives a
reduced amount of heat
Heating circuit pump "ON"/
A3:−9
"OFF"; see the following
to
table
A3:15