Operating Instructions

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Siemens RXB application library (KNX) RXB – Fan coil applications from FC-10, FC-11, FC-12, FC-13 CM110672en_05
Building Technologies 5BFNC08 – Four-pipe fan coil with room supply air cascade 2013-06-07
Four-pipe fan coil with room supply air cascade
FNC08
• Heating with LTHW and cooling with CHW.
• Modulating control of heating and cooling valve.
• Room supply air cascade.
• Automatic or manual fan control.
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.
10385S14
B1
YC
YH
Q1
N1
R1
D1 D2
T
KNX
R
Operating diagrams
Valves
100
0
TR [°C]
Y [%]
SpH SpC
YC
YH
H
C
10385D42
1-2-3 speed fan
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.
TR [°C]
Y
H
C
Q14
Q24
Q34
SpH SpC
10385D43