Boiler"/Group 2 - Viessmann Vitodens 222-F B2TA Installation And Service Instructions Manual

"General"/group 1
Coding in the delivered condition
99:0 Do not adjust
9A:0 Do not adjust
9b:70 Set flow temperature for
external demand 70 °C
9C:20 With LON communication
module:
Monitoring LON subscrib-
ers
If there is no response
from a subscriber after
20 min, the values speci-
fied inside the control unit
are used. Only then will a
fault message be issued
(only for weather-com-
pensated control units)
9F:8 Only for heating circuit
with mixer:
Differential temperature
8 K (only for weather-
compensated control
units)

"Boiler"/group 2

Select "Boiler" for weather-compensa-
ted control units (see page 89).
Coding
Coding in the delivered condition
04:1 Minimum burner pause
time subject to the boiler
load (specified by boiler
coding card)
(cont.)
Possible change
9b:0
to
9b:127
9C:0
9C:5
to
9C:60
9F:0
to
9F:40
Select "2" for constant temperature con-
trol units (see page 89).
Possible change
04:0
Code 2
Set value adjustable from 0
to 127 °C (limited by boiler-
specific parameters)
No monitoring
Time adjustable from 5 to
60 min
Differential temperature
adjustable from 0 to 40 K
Systems with low loss
header:
97