Viessmann Vitoligno 300-P Service Instructions For Contractors page 55

Code 2
(cont.)
If the buffer cylinder temperature (top sensor) falls by a value below the set flow
temperature, the burner will start after a specified delay.
Example:
Code "47:10"
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:
The buffer cylinder heat-
ing stops when the buffer
cylinder temperature
(lower 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.
Possible change
48:1 The buffer cylinder heating
to will be switched off if the
48:20 actual temperature at the
top buffer cylinder temper-
ature sensor falls below the
set temperature by the
selected value, and the
stop point has been
reached at the lower buffer
cylinder temperature sen-
sor; this value is adjustable
between 1 and 20 K.
49:0 The 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.
Codes
55