Siemens RDG400KN Basic Documentation page 42

Notes
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 radiator/floor heating
Y
100%
Vmax
Vmin
0%
Y
SDH
ON
YR
W
OFF
dz
Y Output signal
TR Room temperature
W Effective setpoint Comfort
H Heating sequence
C Cooling sequence
YV Volume flow rate
YR Radiator/floor 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)
Refer to sections 0, 3.6.1 and 3.7.
RDG400KN,RGD405KN Basic documentation
Modulating radiator/floor heating
Y
XpC
C
100%
Vmax
YV
Vmin
0%
TR [癈 ]
Y
100%
0%
TR [癈 ]
XpH Proportional band heating
XpC Proportional band cooling
Vmin Minimum volume output
Vmax Maximum volume output
SDH Switching differential heating
XpC
C
YV
TR [癈 ]
XpH
YR
W
dz
TR [癈 ]
CE1P3192en
2017-02-17