5 Functions of the heating circuit
Which controller functions are available depends on the selected system code number (Anl).
5.1 Weather-compensated control
When weather-compensated control is used, the flow temperature is controlled according to
the outdoor temperature. The heating characteristic in the controller defines the flow temper-
ature set point as a function of the outdoor temperature (–> Fig. 5). The outdoor temperature
required for weather-compensated control can either be measured at an outdoor sensor or
received over the 0 to 10 V input or from a connected device bus.
Functions
WE Configuration
Outdoor sensors AF1, 2 1 CO1, 2, 3 -> F02 - 1
Outdoor temperature received
over 0 to 10 V input
0
–20 °C
50 °C
CO5 -> F23 - 1
Lower transmission range / –30 to 100 °C
Upper transmission range / –30 to 100 °C
If you wish to alternatively receive the outdoor temperature over the device bus, the follow-
ing additional configurations must be made:
Device bus 0 CO7 -> F01 - 1; device bus address
Receive value AF1 0 CO7 -> F07 - 1; register no.
Receive value AF2 0 CO7 -> F09 - 1; register no.
EB 5579 EN 69
Functions of the heating circuit
20
30
0.2
2.4
2.62.93.2
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.4
0.6
40
50
60
70
80
90
100
110
120
130
t
VL
[
°
C]
-20 [
°
C]
t
A
-16-12-8-4048121620
Fig. 5 · Gradient characteristics
t
VL
Flow temperature
t
A
Outdoor temperature
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