Siemens RDG400KN Basic Documentation page 38

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