Viessmann VITOLIGNO 300-P Service Instructions Manual page 66

Codes
Code 2
(cont.)
At 1 K temperature deviation, the burner will start after 10 min, or at a temperature
deviation of 2 K, after 5 min.
Coding in the delivered condition
48:0 Only in systems with a
heating water buffer cyl-
inder:
Buffer cylinder heating
will be stopped only
through the lower buffer
temperature sensor
49:10 Only in systems with a
heating water buffer cyl-
inder:
Buffer cylinder heating
stops when the buffer cyl-
inder temperature (bot-
tom sensor) is within 10 K
of the set value
4E:12 Only in systems with a
heating water buffer cyl-
inder:
Run-on time of the return
temperature raising
pump: 12 min
52:5 Only in systems with a
heating water buffer cyl-
inder:
The return temperature
raising pump stops when
the boiler water tempera-
ture has fallen below the
buffer cylinder tempera-
ture plus 5 K (top sen-
sor)
54:0 Without solar control unit 54:1
66
Possible change
48:1 Buffer cylinder heating will
to be switched off if the actual
48:20 temperature at the top buf-
fer temperature sensor
exceeds the set tempera-
ture by the selected value,
and the stop point has been
reached at the lower buffer
temperature sensor; this
value is adjustable
between 1 and 20 K
49:0 Buffer cylinder heating is
switched off when the set
value has been reached
49:1 Value adjustable from 1 to
to 20 K
49:20
4E:0 Without run-on time
4E:1 Run-on time of the return
to temperature raising pump
4E:30 adjustable from 1 to 30
min
52:0 Value adjustable from 0 to
to 10 K
52:10
With Vitosolic 100;
automatic recognition
54:2 With Vitosolic 200;