Viessmann WB2-44 - Heating Curve

Additional Information
51
Control Unit for Weather-Responsive Operation
with programming unit
(continued)
Heating curve
The heating curves represent the
relationship between the outdoor
temperature and the boiler water or
supply temperature.
Put simply: The lower the outdoor
temperature, the higher the boiler water
or supply temperature.
In turn, the room temperature is
dependent on the boiler water or supply
temperature.
If a different room temperature is set, the
curves are shifted parallel t o the desired
room temperature axis.
Factory settings:
H slope ”n”=1.4
H shift ”N”=0
1. To change the slope
Open cover on programming unit and
go through menu as follows:
Menu option Button
→ HEATING CIRCUIT A ”A”
or
HEATING CIRCUIT B ”B”
→ HEATING CURVE ”B”
→ CHANGE ”A”
2. To change the shift
Open cover on programming unit and
go through the menu as follows:
→ HEATING CIRCUIT A ”A”
or
HEATING CIRCUIT B ”B”
→ HEATING CURVE ”B”
→ CHANGE 2 × ” A”
5285 961 v1.3
1.4
50 41 32 23
14
-4
0.2
0.4
0.6
0.8
1.0
1.2
1.6
1.8
2.0
2.2
2.4 2.6 2.8 3.0 3.2 3.4
Slope
30
40
50
60
70
80
90
100
110
Boiler water temperature or supply temperature in ºF/ºC
Outdoor temperature
5
10 5 0 -5 -10
-20
-15
ºC
ºF
86
104
122
176
194
212
230
158
140
ºF ºC
230/
+68/20 -4/20
0.2
1.4
3.5
Boiler water temperature or supply temperature in ºF/ºC
Outdoor temperature in ºF/ºC
110
-13
+68/20 -4/20
1.4
+40
Outdoor temperature in ºF/ºC
Boiler water temperature or supply temperature in ºF/ºC
230/
110