27/52
Siemens
RXB application library (KNX)
FNC – Fancoil-Applikationen aus FC-10, FC-11, FC-12 CM110672en_0
3
Building Technologies
FNC08 – Four-pipe fan coil with room supply air cascade
30.11.2007
FNC08
Four-pipe fan coil with room supply air cascade
KNX
R
•
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.
1038
5S14
B1
YC
YH
Q1
N1
R1
D1
D2
T
KNX
R
Operating diagrams
100
0
TR [°C]
Y [%]
SpH
SpC
YC
YH
H
C
10
38
5D
4
2
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
10
38
5D
4
3