Adjusting The Heating Curves - Viessmann FB2A Installation And Service Instructions For Contractors

Commissioning, inspection, maintenance
Further details regarding the individual steps

Adjusting the heating curves

The heating curves illustrate the relation-
ship between the outside temperature
and the boiler water or flow tempera-
ture.
To put it simply: The lower the outside
temperature, the higher the boiler water
or flow temperature.
90
80
70
60
50
40
30
A Heating curve slope for underfloor
heating systems
B Heating curve slope for low temper-
ature heating systems (according to
the Energy Savings Order [Ger-
many])
54
The room temperature, again, depends
on the boiler water or the flow tempera-
ture.
Settings in the delivered condition:
■ Slope = 1.4
■ Level = 0
10 5 0 -5 -10 -15 -20
Outside temperature in °C
(cont.)
Slope
-25 -30
1.4
1.2
1.0
B
0.8
0.6
A
0.4
0.2