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Benefit
Description
Setting
Effect
274/348
Siemens Building Technologies
HVAC Products
4.268 Maximum value of heat demand Ux
• Maximum heat demand can be defined
At output Ux, which is defined for the heat demand (operating line 890, setting 5 - 8),
the maximum value of heat demand can be fixed.
Setting range
5...130
The controller can generate a heat demand in the form of an analog voltage signal of
DC 0...10 V.
The maximum heat demand is to be defined on this operating line (corresponding to
10 V).
The conversion of the required temperature to a voltage signal takes place in a linear
fashion based on the following calculation.
[v]
10
8
6
4
2
0
10
20
30
40
50
t
= "Maximum value of heat demand"
S
= "Minimum limitation of heat demand" = 5 °C
DC 0 – 10 V ≙ 0 – 100 %
The voltage can be converted according to the following equation:
10
[V]
" *
current
=
[V]
"
maximum
limitation
Basic Documentation RVP540 / RVP550
Description of the heating engineer settings
Unit
°C
90 100 110 120 130 [°c]
60
70
80
°
temperatur
e
demand"
[
C]
of
temperatur
e
demand"
Factory setting
100
°
[
C]
CE1P2488en
18.10.2002
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