Technical data

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Siemens RDG400KN Basic documentation CE1P3192en
Building Technologies Functions 20 Jul 2010
Without a valid bus signal for changeover air, the air volume is only increased for
cooling:
2-position heating / cooling coil
Modulating heating / cooling coil
Y
YHC
TR [°C]
SDC
C
H
dz
max
min
Y
0%
100%
TR [°C]
XpC
YV
C
Vmin
Vmax
Changeover water
ON
OFF
w
SDH
YHC
(w)
Y
0%
100%
YHC
TR [°C]
XpH
w
XpC
YHC
C
H
dz
max
min
Y
0%
100%
TR [°C]
XpC
YV
C
Vmin
Vmax
Changeover water
(w)
Y Output signal
TR Room temperature
w Comfort setpoint if changeover water = Heating
(w) Comfort setpoint if changeover water = Cooling
H Heating sequence
C Cooling sequence
YV Volume flow rate
XpH Proportional band heating
XpC Proportional band cooling
Vmin Minimum volume output
Vmax Maximum volume output
Note: The diagrams show the PI controller's proportional part only.
Setting the sequence and the control outputs
Refer to sections 3.4 "Applications", 3.6.1 "Sequences", and 3.7 "Outputs".