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6167 814 - 01
Vitodens 200-W B2HE Operating
Appendix
Terminology
(continued)
Heating curve
Heating curves illustrate the relationship between the
outside temperature, the target room temperature and
the supply temperature. The lower the outside
temperature, the higher the supply temperature.
In order to guarantee sufficient heat with minimum fuel
consumption at any outside temperature, the conditions
of your building and system must be taken into
consideration. The heating curve is set by your contractor
for this purpose.
Setting the slope and shift, taking the heating curve as an
example
Factory settings:
Slope = 1.4
Shift = 0
The illustrated heating curves apply with the following
settings:
Heating curve level = 0
Standard room temperature (target room temperature)
= 68°F (20°C)
Note:
Setting the slope or shift too high or too low will
not cause any damage to your heating system.
Both settings affect the level of the supply
temperature, which may then be too low or
unnecessarily
high.
For outside temperature 7°F (
−
14°C):
A
Infloor heating system: Slope 0.2 to 0.8
B
Low temperature heating system: Slope 0.8 to 1.6
C
System with a supply temperature in excess of 167°F
(75°C), slope 1.6 to 2.0
A
If you change the slope:
The steepness of the heating curves changes.
B
If you change the shift:
The heating curves are shifted in parallel in a vertical
direction.
B
If you change the standard room temperature (target
room
temperature):
The heating curves are offset along the “Target room
temperature”
axis.
Slope
Boiler water
Set point
Outside temperature
Heating curve slope
Supply temperature
Outside temperature
