Viessmann Vitoladens 300-W Service Instructions For Contractors page 31

Further details regarding the individual steps
Changing the slope and level
90
+20
Outside temperature in °C
A Changing the slope
B Changing the level (vertical parallel
offset of the heating curve)
1. Slope:
Change with coding address "d3" in
code 1.
Setting range 2 to 35 (equals slope
0.2 to 3.5).
2. Level:
Change with coding address "d4" in
code 1.
Setting range -13 to +40 K.
3.5
1.4
A
B
0.2
-20
Commissioning, inspection, maintenance
(cont.)
Adjusting the set room temperature
Standard room temperature
90
A
C
D
Example 1: Adjustment of standard room
temperature from 20 to 26 °C
A Boiler water temperature or flow
temperature in °C
B Outside temperature in °C
C Set room temperature in °C
D Heating circuit pump "OFF"
E Heating circuit pump "ON"
Press the following keys:
1. a "1r" flashes.
2. d to select heating circuit A1 (heat-
ing circuit without mixer)
or
3. a "2r" flashes.
4. d to select heating circuit with
mixer M2.
-20
B
E
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