Siemens Desigo RXB Technical Manual page 429

Four-pipe fan coil with room supply air cascade
Plant diagram
N1 Room controller.
R1 Room unit with temp.
sensor.
B1 Supply air temperature
sensor.
D1 Window switch.
D2 Presence detector.
Q1 Fan (1... 3-speed).
YH Heating valve.
YC Cooling valve.
Operating diagrams
Y Output signal.
TR Room temperature.
SpH Effective heating setpoint.
SpC Effective cooling setpoint.
H Heating sequence.
C Cooling sequence.
YH Heating valve.
YC Cooling valve.
Q14 Fan speed 1.
F1 Fan speed 2.
Q34 Fan speed 3.
Siemens
Building Technologies
• Heating with LTHW and cooling with CHW.
• Modulating control of heating and cooling valve.
• Room supply air cascade.
• Automatic or manual fan control.
YC
YH
N1
K N X
R
Y [%]
H
100
YH
0
SpH SpC
Y
H
Q34
Q24
Q14
SpH SpC
RXB application library (KNX)
FNC08 – Four-pipe fan coil with room supply air cascade
B1
Q1
T
R1
C
YC
TR [°C]
C
TR [°C]
FNC – Fancoil-Applikationen aus FC-10, FC-11, FC-12
FNC08
K NX
D1 D2
CM110672en_03
R
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30.11.2007