Siemens Desigo RXB Technical Manual page 417

Four-pipe fan coil
Plant diagram
N1 Room controller.
R1 Room unit with temp.
sensor.
B1 Return air 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.
Q24 Fan speed 2.
Q34 Fan speed 3.
Siemens
Building Technologies
• Heating with LTHW and cooling with CHW.
• Modulating control of heating and cooling valve.
• 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)
FNC04 – Four-pipe fan coil
Q1
T
B1
T
R1
C
YC
TR [°C]
C
TR [°C]
FNC – Fancoil-Applikationen aus FC-10, FC-11, FC-12
FNC04
K NX
D1 D2
CM110672en_03
R
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30.11.2007