Viessmann Dekamatik-M1 Operating Instructions Manual page 18

2.4 Settings and Adjustments
Helpful hints
Alter your heating curve, if ...
... heat output is insufficient when
outdoor temperatures are cold, but
adequate during spring and fall
... heat output is too high when
outdoor temperatures are cold, but
adequate during spring and fall
... heat output during spring and fall
is inadequate, but sufficient when
outdoor temperatures are cold
... heat output during spring and fall
is too high, but sufficient when
outdoor temperatures are cold
Effects of adjusting the "
Example 1: Adjusting the "
68 ºF to 79 ºF / 20 ºC to 26 ºC
18
Type of alteration
" or " " knob
" dial from
Increase the value of the "slope" to the
next level.
Decrease the value of the "slope" one
level.
In Figure the "parallel shift" of the
1
heating curve is raised one level, in
Figure the "slope" is lowered one
2
level.
In Figure the "parallel shift" of the
1
heating curve is lowered one level, in
Figure the "slope" is raised one
2
level.
The heating curve is adjusted accordingly
along the desired room temperature axis
and thereby makes available more or less
heat through a higher or lower boiler water
temperature for the same outdoor
temperature.
Boiler water temperature/
A
supply temperature in ºF / ºC
Outdoor temperature in ºF / ºC
B
Desired room temperature in ºF / ºC
C