Viessmann Dekamatik-M1 Operating Instructions Manual page 17

Changing the heating curve
Changing the slope of the heating curve
Changing the parallel shift of the heating
curve
Example of an adjusted heating curve
Example of an adjusted heating curve
Changing the slope and parallel shift of the
heating curve:
In this way you can raise or lower the boiler
water or supply temperature.
Setting ranges:
Slope: 0.2 to 3.5
Parallel shift: -13 to +40
If you want to change the setting of the
heating curve, open the cover and go
through the menu as follows:
H BOILER CIRCUIT
. . . . . . . . . . . . . .
H HEATING CURVE
. . . . . . . . . . . . . .
You are now in the HEATING CURVE
menu. Follow the instructions in the menu
and enter the required heating curve.
Note:
Please consult the "Helpful hints" on page
18 when making adjustments.
Slope:
Parallel shift:
With an outdoor temperature of 32 ºF / 0 ºC:
Boiler water temperature
(=supply temperature)
according to diagram
on page 16:
Parallel shift of heating curve: +9 ºF / +5 ºC
yields a boiler water temperature
(=supply temperature) of
Note:
The boiler water temperature cannot rise
above the temperature set on the adjustable
high limit "
".
2.4 Settings and Adjustments
It is possible that the factory setting of the
heating curve may not give the required
room temperature at different outdoor
temperatures. In this case, adjustment of
the heating curve setting is required.
"A" button
"B" button
1.4
+5
124 ºF / 51 ºC
133 ºF / 56 ºC
17