Viessmann Vitodens 222-F B2TA Installation And Service Instructions Manual page 71

Further details regarding the individual steps
Note
If the heating system includes heating
circuits with mixers, then the flow tem-
perature of the heating circuit without
mixer is higher by a selected differential
(8 K in the delivered condition) than the
flow temperature of the heating circuits
with mixers.
90
80
70
60
50
40
30
Slope setting ranges:
■ Underfloor heating systems: 0.2 to 0.8
■ Low temperature heating systems: 0.8
to 1.6
Selecting the set room temperature
Individually adjustable for each heating
circuit.
Commissioning, inspection, maintenance
The differential temperature is adjusta-
ble via coding address "9F" in the "Gen-
eral" group.
10 5 0 -5 -10 -15 -20
Outside temperature in °C
The heating curve is offset along the axis
of the set room temperature. With the
heating circuit pump logic function ena-
bled, the curve modifies the starting and
stopping characteristics of the heating
circuit pump.
(cont.)
Slope
1.4
1.2
1.0
0.8
0.6
0.4
0.2
-25 -30
71