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Siemens
RDG400KN,RGD405KN Basic documentation
CE1P3192en
Building Technologies
2017-02-17
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 [
癈
]
SDC
C
H
dz
m
ax
m
in
Y
0%
100%
TR [
癈
]
XpC
YV
C
Vmin
Vmax
Changeover water
ON
OFF
w
SDH
YHC
(w)
Y
0%
100%
YHC
TR [
癈
]
XpH
w
XpC
YHC
C
H
dz
m
ax
m
in
Y
0%
100%
TR [
癈
]
XpC
YV
C
Vmin
Vmax
Changeover water
(w)
Y
Output signal
TR
Room temperature
w
Comfort setpoint when heating sequence active
(w)
Comfort setpoint when cooling sequence active
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
SDH Switching differential heating
∂
The diagrams only show the PI controller's proportional part
∂
Switching between heating and cooling depends on the setpoints and the room
temperature (see section 3.6.2)
Setting the sequence and the control outputs
Refer to sections 0, 3.6.1 and 3.7.
Notes