37 / 87
Siemens
RDG400KN,RGD405KN Basic documentation
CE1P3192en
Building Technologies
2017-02-17
m
ax
m
in
Y
0%
100%
TR [
癈
]
YV
C
H
Vmin
Vmax
SpH
Comf/Eco
SpC
Comf/Eco
m
ax
m
in
Y
0%
100%
TR [
癈
]
YV
C
H
Vmin
Vmax
SpH
Prot
SpC
Prot
3.6.5 Single-duct applications
On single-duct applications, the thermostat controls an actuator (air damper, VAV
system, valve, etc.) …
– in heating/cooling mode with changeover (automatically or manually),
– in heating only mode, or
– cooling only mode.
Cooling only is factory-set (P01 = 1).
The output signal for the air flow can be limited to a minimum and maximum value
if required (see section 3.4.1).
Modulating control: 3-position or DC 0…10 V, KNX LTE-Mode
The diagrams below show the control sequence for modulating PI control.
Heating only (P01 = 0)
Cooling only (P01 = 1)
m
ax
m
in
XpH
Y
0%
100%
TR [
癈
]
W
H
Vmin
Vmax
m
ax
m
in
Y
0%
100%
TR [
癈
]
XpC
W
C
Vmin
Vmax
Changeover (P01 = 2, 3)
m
ax
m
in
Changeover
XpH
Y
0%
100%
TR [
癈
]
XpC
W
C
H
Vmin
Vmax
T[°C] Room temperature
XpH Proportional band "Heating"
w
Room temperature setpoint
XpC Proportional band "Cooling"
Y
Control command
Actuator
Vmin Minimum limitation for output
Vmax Maximum limitation for output