38
0.2
Outside temperature in °C
Boiler
water
or
flow temperature
in °C
Slope
2.4
2.6
2.8
3.0
3.2
3.4
90
80
70
60
50
40
30
0
-5 -10 -15 -20
5
10
A
B
2.0
2.2
Set room temperature
in °C
35
30
25
20
15
10
5
0.4
0.6
0.8
1.0
1.2
1.4
-30
-25
C
100
110
1.6
1.8
Fig. 27
Example:
For outside temperature
−
14 °C
:
A
Underfloor heating system, slope 0.2 to 0.8
B
Low temperature heating system, slope 0.8 to 1.6
C
Heating system with a boiler water temperature in
excess of 75 °C, slope 1.6 to 2.0
Factory settings: Slope = 1.4 and level = 0.
A
B
Flow temperature in °C
110
Outside temperature
in °C
3.5
1.4
0.2
-20
C
Set room temperature
in °C
35
30
25
20
15
10
5
Fig. 28
A
Changing the slope:
The gradient of the heating curves changes.
B
Changing the level:
The heating curves are shifted in parallel in a verti-
cal direction.
C
Changing the standard room temperature (set
value):
The heating curves are moved along the "room
temperature set value" axis.
Heating circuit
A heating circuit is a sealed unvented circuit between
the boiler and radiators, through which the heating
water circulates.
A heating system may comprise several heating cir-
cuits: for example, one heating circuit for the rooms
occupied by you and one heating circuit for the rooms
of a separate apartment.
Heating circuit pump
Circulation pump for circulating the heating water in
the heating circuit
Mixer
Hot heating water from the boiler is mixed with cooled
heating water from the heating circuit. The heating
water, brought to the right temperature as required, is
pumped to the heating circuit by the heating circuit
pump. The control unit adjusts the flow temperature via
the mixer to suit different conditions, e.g. changing out-
side temperatures.
Night setback
See "Reduced heating mode"
Open source licences
The programming unit firmware contains open source
software components. Such software is released under
an open source licence and thus available to every-
one.
The full text of the licence can be displayed using the
menu point of the same name.
Appendix
Terminology
(cont.)
5546 498 CA
